NEWS
author haftmann
Fri Feb 06 15:15:32 2009 +0100 (2009-02-06)
changeset 29823 0ab754d13ccd
parent 29810 fa4ec7a7215c
child 29861 3c348f5873f3
permissions -rw-r--r--
session Reflecion renamed to Decision_Procs, moved Dense_Linear_Order there
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Isabelle NEWS -- history user-relevant changes
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==============================================
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New in this Isabelle version
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----------------------------
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*** General ***
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* Simplified main Isabelle executables, with less surprises on
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case-insensitive file-systems (such as Mac OS).
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  - The main Isabelle tool wrapper is now called "isabelle" instead of
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    "isatool."
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  - The former "isabelle" alias for "isabelle-process" has been
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    removed (should rarely occur to regular users).
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  - The former "isabelle-interface" and its alias "Isabelle" have been
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    removed (interfaces are now regular Isabelle tools).
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Within scripts and make files, the Isabelle environment variables
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ISABELLE_TOOL and ISABELLE_PROCESS replace old ISATOOL and ISABELLE,
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respectively.  (The latter are still available as legacy feature.)
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The old isabelle-interface wrapper could react in confusing ways if
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the interface was uninstalled or changed otherwise.  Individual
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interface tool configuration is now more explicit, see also the
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Isabelle system manual.  In particular, Proof General is now available
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via "isabelle emacs".
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INCOMPATIBILITY, need to adapt derivative scripts.  Users may need to
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purge installed copies of Isabelle executables and re-run "isabelle
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install -p ...", or use symlinks.
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* The default for ISABELLE_HOME_USER is now ~/.isabelle instead of the
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old ~/isabelle, which was slightly non-standard and apt cause
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surprises on case-insensitive file-systems.
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INCOMPATIBILITY, need to move existing ~/isabelle/etc,
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~/isabelle/heaps, ~/isabelle/browser_info to the new place.  Special
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care is required when using older releases of Isabelle.  Note that
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ISABELLE_HOME_USER can be changed in Isabelle/etc/settings of any
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Isabelle distribution.
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* Proofs of fully specified statements are run in parallel on
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multi-core systems.  A speedup factor of 2-3 can be expected on a
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regular 4-core machine, if the initial heap space is made reasonably
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large (cf. Poly/ML option -H).  [Poly/ML 5.2.1 or later]
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* The Isabelle System Manual (system) has been updated, with formally
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checked references as hyperlinks.
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* Generalized Isar history, with support for linear undo, direct state
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addressing etc.
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* Recovered hiding of consts, which was accidentally broken in
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Isabelle2007.  Potential INCOMPATIBILITY, ``hide const c'' really
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makes c inaccessible; consider using ``hide (open) const c'' instead.
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* Removed exotic 'token_translation' command.  INCOMPATIBILITY, use ML
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interface instead.
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* There is a new syntactic category "float_const" for signed decimal
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fractions (e.g. 123.45 or -123.45).
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*** Pure ***
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* Class declaration: sc. "base sort" must not be given in import list
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any longer but is inferred from the specification.  Particularly in HOL,
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write
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    class foo = ...     instead of      class foo = type + ...
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* Type binding gradually replaces formerly used type bstring for names
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to be bound.  Name space interface for declarations has been simplified:
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  NameSpace.declare: NameSpace.naming
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    -> binding -> NameSpace.T -> string * NameSpace.T
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  NameSpace.bind: NameSpace.naming
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    -> binding * 'a -> 'a NameSpace.table -> string * 'a NameSpace.table
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         (*exception Symtab.DUP*)
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See further modules src/Pure/General/binding.ML and
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src/Pure/General/name_space.ML
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* Module moves in repository:
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    src/Pure/Tools/value.ML ~> src/Tools/
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    src/Pure/Tools/quickcheck.ML ~> src/Tools/
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* Slightly more coherent Pure syntax, with updated documentation in
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isar-ref manual.  Removed locales meta_term_syntax and
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meta_conjunction_syntax: TERM and &&& (formerly &&) are now permanent,
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INCOMPATIBILITY in rare situations.
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* Goal-directed proof now enforces strict proof irrelevance wrt. sort
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hypotheses.  Sorts required in the course of reasoning need to be
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covered by the constraints in the initial statement, completed by the
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type instance information of the background theory.  Non-trivial sort
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hypotheses, which rarely occur in practice, may be specified via
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vacuous propositions of the form SORT_CONSTRAINT('a::c).  For example:
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  lemma assumes "SORT_CONSTRAINT('a::empty)" shows False ...
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The result contains an implicit sort hypotheses as before --
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SORT_CONSTRAINT premises are eliminated as part of the canonical rule
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normalization.
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* Changed defaults for unify configuration options:
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  unify_trace_bound = 50 (formerly 25)
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  unify_search_bound = 60 (formerly 30)
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* Different bookkeeping for code equations:
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  a) On theory merge, the last set of code equations for a particular constant
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     is taken (in accordance with the policy applied by other parts of the
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     code generator framework).
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  b) Code equations stemming from explicit declarations (e.g. code attribute)
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     gain priority over default code equations stemming from definition, primrec,
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     fun etc.
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  INCOMPATIBILITY.
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* Global versions of theorems stemming from classes do not carry
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a parameter prefix any longer.  INCOMPATIBILITY.
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* Dropped locale element "includes".  This is a major INCOMPATIBILITY.
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In existing theorem specifications replace the includes element by the
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respective context elements of the included locale, omitting those that
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are already present in the theorem specification.  Multiple assume
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elements of a locale should be replaced by a single one involving the
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locale predicate.  In the proof body, declarations (most notably
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theorems) may be regained by interpreting the respective locales in the
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proof context as required (command "interpret").
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If using "includes" in replacement of a target solely because the
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parameter types in the theorem are not as general as in the target,
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consider declaring a new locale with additional type constraints on the
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parameters (context element "constrains").
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* Dropped "locale (open)".  INCOMPATIBILITY.
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* Interpretation commands no longer attempt to simplify goal.
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INCOMPATIBILITY: in rare situations the generated goal differs.  Use
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methods intro_locales and unfold_locales to clarify.
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* Interpretation commands no longer accept interpretation attributes.
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INCOMPATBILITY.
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* Complete re-implementation of locales.  INCOMPATIBILITY.
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The most important changes are listed below.  See documentation
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(forthcoming) and tutorial (also forthcoming) for details.
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- In locale expressions, instantiation replaces renaming.  Parameters
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must be declared in a for clause.  To aid compatibility with previous
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parameter inheritance, in locale declarations, parameters that are not
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'touched' (instantiation position "_" or omitted) are implicitly added
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with their syntax at the beginning of the for clause.
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- Syntax from abbreviations and definitions in locales is available in
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locale expressions and context elements.  The latter is particularly
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useful in locale declarations.
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- More flexible mechanisms to qualify names generated by locale
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expressions.  Qualifiers (prefixes) may be specified in locale
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expressions.  Available are normal qualifiers (syntax "name:") and strict
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qualifiers (syntax "name!:").  The latter must occur in name references
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and are useful to avoid accidental hiding of names, the former are
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optional.  Qualifiers derived from the parameter names of a locale are no
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longer generated.
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- "sublocale l < e" replaces "interpretation l < e".  The instantiation
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clause in "interpretation" and "interpret" (square brackets) is no
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longer available.  Use locale expressions.
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- When converting proof scripts, be sure to replace qualifiers in
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"interpretation" and "interpret" by strict qualifiers.  Qualifiers in
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locale expressions range over a single locale instance only.
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* Command 'instance': attached definitions no longer accepted.
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INCOMPATIBILITY, use proper 'instantiation' target.
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* Keyword 'code_exception' now named 'code_abort'.  INCOMPATIBILITY.
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* The 'axiomatization' command now only works within a global theory
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context.  INCOMPATIBILITY.
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*** Document preparation ***
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* Antiquotation @{lemma} now imitates a regular terminal proof,
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demanding keyword 'by' and supporting the full method expression
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syntax just like the Isar command 'by'.
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*** HOL ***
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* Auxiliary class "itself" has disappeared -- classes without any parameter
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are treated as expected by the 'class' command.
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* Leibnitz's Series for Pi and the arcus tangens and logarithm series.
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* Common decision procedures (Cooper, MIR, Ferrack, Approximation, Dense_Linear_Order)
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now in directory HOL/Decision_Procs.
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* Theory HOL/Decisioin_Procs/Approximation.thy provides the new proof method
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"approximation".  It proves formulas on real values by using interval arithmetic.
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In the formulas are also the transcendental functions sin, cos, tan, atan, ln,
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exp and the constant pi are allowed.  For examples see HOL/ex/ApproximationEx.thy.
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* Theory "Reflection" now resides in HOL/Library.
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* Entry point to Word library now simply named "Word".  INCOMPATIBILITY.
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* Made source layout more coherent with logical distribution
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structure:
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    src/HOL/Library/RType.thy ~> src/HOL/Typerep.thy
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    src/HOL/Library/Code_Message.thy ~> src/HOL/
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    src/HOL/Library/GCD.thy ~> src/HOL/
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    src/HOL/Library/Order_Relation.thy ~> src/HOL/
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    src/HOL/Library/Parity.thy ~> src/HOL/
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    src/HOL/Library/Univ_Poly.thy ~> src/HOL/
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    src/HOL/Real/ContNotDenum.thy ~> src/HOL/
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    src/HOL/Real/Lubs.thy ~> src/HOL/
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    src/HOL/Real/PReal.thy ~> src/HOL/
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    src/HOL/Real/Rational.thy ~> src/HOL/
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    src/HOL/Real/RComplete.thy ~> src/HOL/
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    src/HOL/Real/RealDef.thy ~> src/HOL/
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    src/HOL/Real/RealPow.thy ~> src/HOL/
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    src/HOL/Real/Real.thy ~> src/HOL/
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    src/HOL/Complex/Complex_Main.thy ~> src/HOL/
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    src/HOL/Complex/Complex.thy ~> src/HOL/
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    src/HOL/Complex/FrechetDeriv.thy ~> src/HOL/
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    src/HOL/Complex/Fundamental_Theorem_Algebra.thy ~> src/HOL/
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    src/HOL/Hyperreal/Deriv.thy ~> src/HOL/
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    src/HOL/Hyperreal/Fact.thy ~> src/HOL/
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    src/HOL/Hyperreal/Integration.thy ~> src/HOL/
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    src/HOL/Hyperreal/Lim.thy ~> src/HOL/
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    src/HOL/Hyperreal/Ln.thy ~> src/HOL/
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    src/HOL/Hyperreal/Log.thy ~> src/HOL/
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    src/HOL/Hyperreal/MacLaurin.thy ~> src/HOL/
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    src/HOL/Hyperreal/NthRoot.thy ~> src/HOL/
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    src/HOL/Hyperreal/Series.thy ~> src/HOL/
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    src/HOL/Hyperreal/SEQ.thy ~> src/HOL/
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    src/HOL/Hyperreal/Taylor.thy ~> src/HOL/
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    src/HOL/Hyperreal/Transcendental.thy ~> src/HOL/
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    src/HOL/Real/Float ~> src/HOL/Library/
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    src/HOL/Real/HahnBanach ~> src/HOL/HahnBanach
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    src/HOL/Real/RealVector.thy ~> src/HOL/
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    src/HOL/arith_data.ML ~> src/HOL/Tools
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    src/HOL/hologic.ML ~> src/HOL/Tools
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    src/HOL/simpdata.ML ~> src/HOL/Tools
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    src/HOL/int_arith1.ML ~> src/HOL/Tools/int_arith.ML
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    src/HOL/int_factor_simprocs.ML ~> src/HOL/Tools
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    src/HOL/nat_simprocs.ML ~> src/HOL/Tools
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    src/HOL/Real/float_arith.ML ~> src/HOL/Tools
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    src/HOL/Real/float_syntax.ML ~> src/HOL/Tools
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    src/HOL/Real/rat_arith.ML ~> src/HOL/Tools
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    src/HOL/Real/real_arith.ML ~> src/HOL/Tools
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    src/HOL/Library/Array.thy ~> src/HOL/Imperative_HOL
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    src/HOL/Library/Heap_Monad.thy ~> src/HOL/Imperative_HOL
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    src/HOL/Library/Heap.thy ~> src/HOL/Imperative_HOL
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    src/HOL/Library/Imperative_HOL.thy ~> src/HOL/Imperative_HOL
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    src/HOL/Library/Ref.thy ~> src/HOL/Imperative_HOL
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    src/HOL/Library/Relational.thy ~> src/HOL/Imperative_HOL
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* If methods "eval" and "evaluation" encounter a structured proof state
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with !!/==>, only the conclusion is evaluated to True (if possible),
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avoiding strange error messages.
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* Simplifier: simproc for let expressions now unfolds if bound variable
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occurs at most one time in let expression body.  INCOMPATIBILITY.
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* New classes "top" and "bot" with corresponding operations "top" and "bot"
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in theory Orderings;  instantiation of class "complete_lattice" requires
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instantiation of classes "top" and "bot".  INCOMPATIBILITY.
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* Changed definition lemma "less_fun_def" in order to provide an instance
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for preorders on functions;  use lemma "less_le" instead.  INCOMPATIBILITY.
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* Unified theorem tables for both code code generators.  Thus
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[code func] has disappeared and only [code] remains.  INCOMPATIBILITY.
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* Constants "undefined" and "default" replace "arbitrary".  Usually
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"undefined" is the right choice to replace "arbitrary", though logically
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there is no difference.  INCOMPATIBILITY.
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* Generic ATP manager for Sledgehammer, based on ML threads instead of
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Posix processes.  Avoids potentially expensive forking of the ML
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process.  New thread-based implementation also works on non-Unix
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platforms (Cygwin).  Provers are no longer hardwired, but defined
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within the theory via plain ML wrapper functions.  Basic Sledgehammer
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commands are covered in the isar-ref manual
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* Wrapper scripts for remote SystemOnTPTP service allows to use
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sledgehammer without local ATP installation (Vampire etc.).  See also
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ISABELLE_HOME/contrib/SystemOnTPTP and the VAMPIRE_HOME setting
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variable.  Other provers may be included via suitable ML wrappers, see
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also src/HOL/ATP_Linkup.thy.
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* Normalization by evaluation now allows non-leftlinear equations.
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Declare with attribute [code nbe].
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* Command "value" now integrates different evaluation
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mechanisms.  The result of the first successful evaluation mechanism
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is printed.  In square brackets a particular named evaluation
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mechanisms may be specified (currently, [SML], [code] or [nbe]).  See
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further src/HOL/ex/Eval_Examples.thy.
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* New method "sizechange" to automate termination proofs using (a
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modification of) the size-change principle. Requires SAT solver. See
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src/HOL/ex/Termination.thy for examples.
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* HOL/Orderings: class "wellorder" moved here, with explicit induction
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rule "less_induct" as assumption.  For instantiation of "wellorder" by
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means of predicate "wf", use rule wf_wellorderI.  INCOMPATIBILITY.
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* HOL/Orderings: added class "preorder" as superclass of "order".
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INCOMPATIBILITY: Instantiation proofs for order, linorder
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etc. slightly changed.  Some theorems named order_class.* now named
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preorder_class.*.
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* HOL/Finite_Set: added a new fold combinator of type
nipkow@28855
   325
  ('a => 'b => 'b) => 'b => 'a set => 'b
nipkow@28855
   326
Occasionally this is more convenient than the old fold combinator which is
nipkow@28855
   327
now defined in terms of the new one and renamed to fold_image.
nipkow@28855
   328
nipkow@29671
   329
* HOL/Ring_and_Field and HOL/OrderedGroup: The lemmas "group_simps" and
nipkow@29671
   330
"ring_simps" have been replaced by "algebra_simps" (which can be extended with
nipkow@29671
   331
further lemmas!). At the moment both still exist but the former will disappear
nipkow@29671
   332
at some point.
nipkow@29671
   333
wenzelm@27793
   334
* HOL/Ring_and_Field and HOL/Divides: Definition of "op dvd" has been
wenzelm@27793
   335
moved to separate class dvd in Ring_and_Field; a couple of lemmas on
wenzelm@27793
   336
dvd has been generalized to class comm_semiring_1.  Likewise a bunch
wenzelm@27793
   337
of lemmas from Divides has been generalized from nat to class
wenzelm@27793
   338
semiring_div.  INCOMPATIBILITY.  This involves the following theorem
wenzelm@27793
   339
renames resulting from duplicate elimination:
haftmann@27651
   340
haftmann@27651
   341
    dvd_def_mod ~>          dvd_eq_mod_eq_0
haftmann@27651
   342
    zero_dvd_iff ~>         dvd_0_left_iff
haftmann@28559
   343
    dvd_0 ~>                dvd_0_right
haftmann@27651
   344
    DIVISION_BY_ZERO_DIV ~> div_by_0
haftmann@27651
   345
    DIVISION_BY_ZERO_MOD ~> mod_by_0
haftmann@27651
   346
    mult_div ~>             div_mult_self2_is_id
haftmann@27651
   347
    mult_mod ~>             mod_mult_self2_is_0
haftmann@27651
   348
wenzelm@27599
   349
* HOL/Library/GCD: Curried operations gcd, lcm (for nat) and zgcd,
wenzelm@27599
   350
zlcm (for int); carried together from various gcd/lcm developements in
wenzelm@27599
   351
the HOL Distribution.  zgcd and zlcm replace former igcd and ilcm;
wenzelm@27599
   352
corresponding theorems renamed accordingly.  INCOMPATIBILY.  To
wenzelm@27599
   353
recover tupled syntax, use syntax declarations like:
haftmann@27556
   354
haftmann@27556
   355
    hide (open) const gcd
haftmann@27556
   356
    abbreviation gcd where
haftmann@27556
   357
      "gcd == (%(a, b). GCD.gcd a b)"
haftmann@27556
   358
    notation (output)
haftmann@27556
   359
      GCD.gcd ("gcd '(_, _')")
haftmann@27556
   360
haftmann@27556
   361
(analogously for lcm, zgcd, zlcm).
haftmann@27556
   362
haftmann@27556
   363
* HOL/Real/Rational: 'Fract k 0' now equals '0'.  INCOMPATIBILITY.
haftmann@27551
   364
nipkow@28964
   365
* The real numbers offer decimal input syntax: 12.34 is translated into
nipkow@28964
   366
  1234/10^4. This translation is not reversed upon output.
nipkow@28964
   367
haftmann@27651
   368
* New ML antiquotation @{code}: takes constant as argument, generates
haftmann@27651
   369
corresponding code in background and inserts name of the corresponding
haftmann@27651
   370
resulting ML value/function/datatype constructor binding in place.
haftmann@27651
   371
All occurrences of @{code} with a single ML block are generated
haftmann@27651
   372
simultaneously.  Provides a generic and safe interface for
haftmann@27651
   373
instrumentalizing code generation.  See HOL/ex/Code_Antiq for a toy
haftmann@27651
   374
example, or HOL/Complex/ex/ReflectedFerrack for a more ambitious
haftmann@27651
   375
application.  In future you ought refrain from ad-hoc compiling
haftmann@27651
   376
generated SML code on the ML toplevel.  Note that (for technical
haftmann@27651
   377
reasons) @{code} cannot refer to constants for which user-defined
haftmann@27651
   378
serializations are set.  Refer to the corresponding ML counterpart
haftmann@27651
   379
directly in that cases.
haftmann@27651
   380
haftmann@27424
   381
* Integrated image HOL-Complex with HOL.  Entry points Main.thy and
haftmann@27424
   382
Complex_Main.thy remain as they are.
haftmann@27424
   383
wenzelm@27599
   384
* New image HOL-Plain provides a minimal HOL with the most important
wenzelm@27599
   385
tools available (inductive, datatype, primrec, ...).  By convention
wenzelm@27599
   386
the corresponding theory Plain should be ancestor of every further
wenzelm@27599
   387
(library) theory.  Some library theories now have ancestor Plain
wenzelm@27599
   388
(instead of Main), thus theory Main occasionally has to be imported
wenzelm@27599
   389
explicitly.
haftmann@27421
   390
wenzelm@28248
   391
* The metis method now fails in the usual manner, rather than raising
wenzelm@28248
   392
an exception, if it determines that it cannot prove the theorem.
paulson@28233
   393
paulson@28700
   394
* The metis method no longer fails because the theorem is too trivial
paulson@28700
   395
(contains the empty clause).
paulson@28700
   396
wenzelm@27324
   397
* Methods "case_tac" and "induct_tac" now refer to the very same rules
wenzelm@27324
   398
as the structured Isar versions "cases" and "induct", cf. the
wenzelm@27324
   399
corresponding "cases" and "induct" attributes.  Mutual induction rules
wenzelm@27324
   400
are now presented as a list of individual projections
wenzelm@27324
   401
(e.g. foo_bar.inducts for types foo and bar); the old format with
wenzelm@27324
   402
explicit HOL conjunction is no longer supported.  INCOMPATIBILITY, in
wenzelm@27324
   403
rare situations a different rule is selected --- notably nested tuple
wenzelm@27324
   404
elimination instead of former prod.exhaust: use explicit (case_tac t
wenzelm@27324
   405
rule: prod.exhaust) here.
wenzelm@27122
   406
wenzelm@27141
   407
* Attributes "cases", "induct", "coinduct" support "del" option.
wenzelm@27141
   408
wenzelm@27122
   409
* Removed fact "case_split_thm", which duplicates "case_split".
wenzelm@27122
   410
wenzelm@27122
   411
* Command 'rep_datatype': instead of theorem names the command now
wenzelm@27122
   412
takes a list of terms denoting the constructors of the type to be
wenzelm@27122
   413
represented as datatype.  The characteristic theorems have to be
wenzelm@27122
   414
proven.  INCOMPATIBILITY.  Also observe that the following theorems
wenzelm@27122
   415
have disappeared in favour of existing ones:
wenzelm@27122
   416
haftmann@27104
   417
    unit_induct                 ~> unit.induct
haftmann@27104
   418
    prod_induct                 ~> prod.induct
haftmann@27104
   419
    sum_induct                  ~> sum.induct
haftmann@27104
   420
    Suc_Suc_eq                  ~> nat.inject
haftmann@27104
   421
    Suc_not_Zero Zero_not_Suc   ~> nat.distinct
haftmann@27104
   422
wenzelm@27122
   423
* Library/Nat_Infinity: added addition, numeral syntax and more
wenzelm@27122
   424
instantiations for algebraic structures.  Removed some duplicate
wenzelm@27122
   425
theorems.  Changes in simp rules.  INCOMPATIBILITY.
haftmann@27104
   426
wenzelm@28088
   427
* ATP selection (E/Vampire/Spass) is now via Proof General's settings
wenzelm@28088
   428
menu.
nipkow@28067
   429
haftmann@27104
   430
ballarin@27696
   431
*** HOL-Algebra ***
ballarin@27696
   432
ballarin@27713
   433
* New locales for orders and lattices where the equivalence relation
ballarin@27713
   434
  is not restricted to equality.  INCOMPATIBILITY: all order and
ballarin@27713
   435
  lattice locales use a record structure with field eq for the
ballarin@27713
   436
  equivalence.
ballarin@27713
   437
ballarin@27713
   438
* New theory of factorial domains.
ballarin@27713
   439
ballarin@27696
   440
* Units_l_inv and Units_r_inv are now simprules by default.
ballarin@27696
   441
INCOMPATIBILITY.  Simplifier proof that require deletion of l_inv
ballarin@27696
   442
and/or r_inv will now also require deletion of these lemmas.
ballarin@27696
   443
ballarin@27696
   444
* Renamed the following theorems.  INCOMPATIBILITY.
ballarin@27696
   445
UpperD ~> Upper_memD
ballarin@27696
   446
LowerD ~> Lower_memD
ballarin@27696
   447
least_carrier ~> least_closed
ballarin@27696
   448
greatest_carrier ~> greatest_closed
ballarin@27696
   449
greatest_Lower_above ~> greatest_Lower_below
ballarin@27717
   450
one_zero ~> carrier_one_zero
ballarin@27717
   451
one_not_zero ~> carrier_one_not_zero  (collision with assumption)
ballarin@27696
   452
wenzelm@27793
   453
huffman@27485
   454
*** HOL-NSA ***
huffman@27485
   455
huffman@27485
   456
* Created new image HOL-NSA, containing theories of nonstandard
huffman@27485
   457
analysis which were previously part of HOL-Complex.  Entry point
huffman@27485
   458
Hyperreal.thy remains valid, but theories formerly using
huffman@27485
   459
Complex_Main.thy should now use new entry point Hypercomplex.thy.
huffman@27485
   460
huffman@27485
   461
ballarin@27704
   462
*** ZF ***
ballarin@27704
   463
ballarin@27704
   464
* Proof of Zorn's Lemma for partial orders.
ballarin@27704
   465
ballarin@27704
   466
wenzelm@27246
   467
*** ML ***
wenzelm@28088
   468
wenzelm@29161
   469
* High-level support for concurrent ML programming, see
wenzelm@29161
   470
src/Pure/Cuncurrent.  The data-oriented model of "future values" is
wenzelm@29161
   471
particularly convenient to organize independent functional
wenzelm@29161
   472
computations.  The concept of "synchronized variables" provides a
wenzelm@29161
   473
higher-order interface for components with shared state, avoiding the
wenzelm@29162
   474
delicate details of mutexes and condition variables.  [Poly/ML 5.2.1
wenzelm@29162
   475
or later]
wenzelm@29161
   476
wenzelm@28294
   477
* Simplified ML oracle interface Thm.add_oracle promotes 'a -> cterm
wenzelm@28294
   478
to 'a -> thm, while results are always tagged with an authentic oracle
wenzelm@28294
   479
name.  The Isar command 'oracle' is now polymorphic, no argument type
wenzelm@28294
   480
is specified.  INCOMPATIBILITY, need to simplify existing oracle code
wenzelm@28294
   481
accordingly.  Note that extra performance may be gained by producing
wenzelm@28294
   482
the cterm carefully, avoiding slow Thm.cterm_of.
wenzelm@28294
   483
wenzelm@28282
   484
* ML bindings produced via Isar commands are stored within the Isar
wenzelm@28282
   485
context (theory or proof).  Consequently, commands like 'use' and 'ML'
wenzelm@28282
   486
become thread-safe and work with undo as expected (concerning
wenzelm@28282
   487
top-level bindings, not side-effects on global references).
wenzelm@28282
   488
INCOMPATIBILITY, need to provide proper Isar context when invoking the
wenzelm@28282
   489
compiler at runtime; really global bindings need to be given outside a
wenzelm@28282
   490
theory. [Poly/ML 5.2 or later]
wenzelm@28282
   491
wenzelm@28282
   492
* Command 'ML_prf' is analogous to 'ML' but works within a proof
wenzelm@28282
   493
context. Top-level ML bindings are stored within the proof context in
wenzelm@28282
   494
a purely sequential fashion, disregarding the nested proof structure.
wenzelm@28282
   495
ML bindings introduced by 'ML_prf' are discarded at the end of the
wenzelm@28282
   496
proof.  [Poly/ML 5.2 or later]
wenzelm@28282
   497
wenzelm@28099
   498
* Generic Toplevel.add_hook interface allows to analyze the result of
wenzelm@28103
   499
transactions.  E.g. see src/Pure/ProofGeneral/proof_general_pgip.ML
wenzelm@28103
   500
for theorem dependency output of transactions resulting in a new
wenzelm@28103
   501
theory state.
wenzelm@28099
   502
wenzelm@28088
   503
* Name bindings in higher specification mechanisms (notably
wenzelm@28088
   504
LocalTheory.define, LocalTheory.note, and derived packages) are now
wenzelm@28088
   505
formalized as type Name.binding, replacing old bstring.
wenzelm@28088
   506
INCOMPATIBILITY, need to wrap strings via Name.binding function, see
wenzelm@28088
   507
also Name.name_of.  Packages should pass name bindings given by the
wenzelm@28088
   508
user to underlying specification mechanisms; this enables precise
wenzelm@28088
   509
tracking of source positions, for example.
wenzelm@28088
   510
wenzelm@28089
   511
* Result facts (from PureThy.note_thms, ProofContext.note_thms,
wenzelm@28089
   512
LocalTheory.note etc.) now refer to the *full* internal name, not the
wenzelm@28089
   513
bstring as before.  INCOMPATIBILITY, not detected by ML type-checking!
wenzelm@28089
   514
wenzelm@27246
   515
* Rules and tactics that read instantiations (read_instantiate,
wenzelm@27246
   516
res_inst_tac, thin_tac, subgoal_tac etc.) now demand a proper proof
wenzelm@27246
   517
context, which is required for parsing and type-checking.  Moreover,
wenzelm@27246
   518
the variables are specified as plain indexnames, not string encodings
wenzelm@27246
   519
thereof.  INCOMPATIBILITY.
wenzelm@27246
   520
wenzelm@27287
   521
* Disposed old type and term read functions (Sign.read_def_typ,
wenzelm@27287
   522
Sign.read_typ, Sign.read_def_terms, Sign.read_term,
wenzelm@27287
   523
Thm.read_def_cterms, Thm.read_cterm etc.).  INCOMPATIBILITY, should
wenzelm@27287
   524
use regular Syntax.read_typ, Syntax.read_term, Syntax.read_typ_global,
wenzelm@27269
   525
Syntax.read_term_global etc.; see also OldGoals.read_term as last
wenzelm@27269
   526
resort for legacy applications.
wenzelm@27269
   527
wenzelm@27380
   528
* Antiquotations: block-structured compilation context indicated by
wenzelm@27391
   529
\<lbrace> ... \<rbrace>; additional antiquotation forms:
wenzelm@27391
   530
wenzelm@27519
   531
  @{let ?pat = term}                      - term abbreviation (HO matching)
wenzelm@27519
   532
  @{note name = fact}                     - fact abbreviation
wenzelm@27519
   533
  @{thm fact}                             - singleton fact (with attributes)
wenzelm@27519
   534
  @{thms fact}                            - general fact (with attributes)
wenzelm@27519
   535
  @{lemma prop by method}                 - singleton goal
wenzelm@27519
   536
  @{lemma prop by meth1 meth2}            - singleton goal
wenzelm@27519
   537
  @{lemma prop1 ... propN by method}      - general goal
wenzelm@27519
   538
  @{lemma prop1 ... propN by meth1 meth2} - general goal
wenzelm@27519
   539
  @{lemma (open) ...}                     - open derivation
wenzelm@27380
   540
wenzelm@27246
   541
wenzelm@27979
   542
*** System ***
wenzelm@27979
   543
wenzelm@28676
   544
* Multithreading for Poly/ML 5.1/5.2 is no longer supported, only for
wenzelm@28676
   545
Poly/ML 5.2.1 or later.
wenzelm@28254
   546
wenzelm@28248
   547
* The Isabelle "emacs" tool provides a specific interface to invoke
wenzelm@28248
   548
Proof General / Emacs, with more explicit failure if that is not
wenzelm@28248
   549
installed (the old isabelle-interface script silently falls back on
wenzelm@28248
   550
isabelle-process).  The PROOFGENERAL_HOME setting determines the
wenzelm@28248
   551
installation location of the Proof General distribution.
wenzelm@28248
   552
wenzelm@27979
   553
* Isabelle/lib/classes/Pure.jar provides basic support to integrate
wenzelm@27979
   554
the Isabelle process into a JVM/Scala application.  See
wenzelm@27979
   555
Isabelle/lib/jedit/plugin for a minimal example.  (The obsolete Java
wenzelm@27979
   556
process wrapper has been discontinued.)
wenzelm@27979
   557
wenzelm@27979
   558
* Status messages (with exact source position information) are
wenzelm@27979
   559
emitted, if proper markup print mode is enabled.  This allows
wenzelm@27979
   560
user-interface components to provide detailed feedback on internal
wenzelm@27979
   561
prover operations.
wenzelm@27979
   562
wenzelm@27979
   563
* Homegrown Isabelle font with unicode layout, see Isabelle/lib/fonts.
wenzelm@27979
   564
wenzelm@27979
   565
wenzelm@27143
   566
wenzelm@27008
   567
New in Isabelle2008 (June 2008)
wenzelm@27008
   568
-------------------------------
wenzelm@25464
   569
wenzelm@25522
   570
*** General ***
wenzelm@25522
   571
wenzelm@27061
   572
* The Isabelle/Isar Reference Manual (isar-ref) has been reorganized
wenzelm@27061
   573
and updated, with formally checked references as hyperlinks.
wenzelm@27061
   574
wenzelm@25994
   575
* Theory loader: use_thy (and similar operations) no longer set the
wenzelm@25994
   576
implicit ML context, which was occasionally hard to predict and in
wenzelm@25994
   577
conflict with concurrency.  INCOMPATIBILITY, use ML within Isar which
wenzelm@25994
   578
provides a proper context already.
wenzelm@25994
   579
wenzelm@26323
   580
* Theory loader: old-style ML proof scripts being *attached* to a thy
wenzelm@26323
   581
file are no longer supported.  INCOMPATIBILITY, regular 'uses' and
wenzelm@26323
   582
'use' within a theory file will do the job.
wenzelm@26323
   583
wenzelm@26650
   584
* Name space merge now observes canonical order, i.e. the second space
wenzelm@26650
   585
is inserted into the first one, while existing entries in the first
wenzelm@26659
   586
space take precedence.  INCOMPATIBILITY in rare situations, may try to
wenzelm@26650
   587
swap theory imports.
wenzelm@26650
   588
wenzelm@27067
   589
* Syntax: symbol \<chi> is now considered a letter.  Potential
wenzelm@27067
   590
INCOMPATIBILITY in identifier syntax etc.
wenzelm@27067
   591
wenzelm@27067
   592
* Outer syntax: string tokens no longer admit escaped white space,
wenzelm@27067
   593
which was an accidental (undocumented) feature.  INCOMPATIBILITY, use
wenzelm@27067
   594
white space without escapes.
wenzelm@27067
   595
wenzelm@27067
   596
* Outer syntax: string tokens may contain arbitrary character codes
wenzelm@27067
   597
specified via 3 decimal digits (as in SML).  E.g. "foo\095bar" for
wenzelm@27067
   598
"foo_bar".
wenzelm@27067
   599
wenzelm@25522
   600
haftmann@25502
   601
*** Pure ***
haftmann@25502
   602
wenzelm@26718
   603
* Context-dependent token translations.  Default setup reverts locally
wenzelm@26718
   604
fixed variables, and adds hilite markup for undeclared frees.
wenzelm@26718
   605
berghofe@26681
   606
* Unused theorems can be found using the new command 'unused_thms'.
berghofe@26681
   607
There are three ways of invoking it:
berghofe@26681
   608
berghofe@26681
   609
(1) unused_thms
berghofe@26681
   610
     Only finds unused theorems in the current theory.
berghofe@26681
   611
berghofe@26681
   612
(2) unused_thms thy_1 ... thy_n -
berghofe@26681
   613
     Finds unused theorems in the current theory and all of its ancestors,
berghofe@26681
   614
     excluding the theories thy_1 ... thy_n and all of their ancestors.
berghofe@26681
   615
berghofe@26681
   616
(3) unused_thms thy_1 ... thy_n - thy'_1 ... thy'_m
berghofe@26681
   617
     Finds unused theorems in the theories thy'_1 ... thy'_m and all of
berghofe@26681
   618
     their ancestors, excluding the theories thy_1 ... thy_n and all of
berghofe@26681
   619
     their ancestors.
berghofe@26681
   620
wenzelm@26718
   621
In order to increase the readability of the list produced by
wenzelm@26718
   622
unused_thms, theorems that have been created by a particular instance
wenzelm@26874
   623
of a theory command such as 'inductive' or 'function' are considered
wenzelm@26874
   624
to belong to the same "group", meaning that if at least one theorem in
wenzelm@26718
   625
this group is used, the other theorems in the same group are no longer
wenzelm@26718
   626
reported as unused.  Moreover, if all theorems in the group are
wenzelm@26718
   627
unused, only one theorem in the group is displayed.
wenzelm@26718
   628
wenzelm@26718
   629
Note that proof objects have to be switched on in order for
wenzelm@26718
   630
unused_thms to work properly (i.e. !proofs must be >= 1, which is
wenzelm@26874
   631
usually the case when using Proof General with the default settings).
berghofe@26681
   632
wenzelm@26650
   633
* Authentic naming of facts disallows ad-hoc overwriting of previous
wenzelm@26650
   634
theorems within the same name space.  INCOMPATIBILITY, need to remove
wenzelm@26650
   635
duplicate fact bindings, or even accidental fact duplications.  Note
wenzelm@26650
   636
that tools may maintain dynamically scoped facts systematically, using
wenzelm@26650
   637
PureThy.add_thms_dynamic.
wenzelm@26650
   638
wenzelm@26660
   639
* Command 'hide' now allows to hide from "fact" name space as well.
wenzelm@26660
   640
wenzelm@26496
   641
* Eliminated destructive theorem database, simpset, claset, and
wenzelm@26496
   642
clasimpset.  Potential INCOMPATIBILITY, really need to observe linear
wenzelm@26496
   643
update of theories within ML code.
wenzelm@26479
   644
wenzelm@26955
   645
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm@26955
   646
INCOMPATIBILITY, object-logics depending on former Pure require
wenzelm@26955
   647
additional setup PureThy.old_appl_syntax_setup; object-logics
wenzelm@26955
   648
depending on former CPure need to refer to Pure.
wenzelm@26650
   649
wenzelm@26495
   650
* Commands 'use' and 'ML' are now purely functional, operating on
wenzelm@26479
   651
theory/local_theory.  Removed former 'ML_setup' (on theory), use 'ML'
wenzelm@26479
   652
instead.  Added 'ML_val' as mere diagnostic replacement for 'ML'.
wenzelm@26479
   653
INCOMPATIBILITY.
wenzelm@26479
   654
wenzelm@26874
   655
* Command 'setup': discontinued implicit version with ML reference.
wenzelm@26434
   656
wenzelm@25970
   657
* Instantiation target allows for simultaneous specification of class
wenzelm@25970
   658
instance operations together with an instantiation proof.
wenzelm@25970
   659
Type-checking phase allows to refer to class operations uniformly.
wenzelm@27067
   660
See src/HOL/Complex/Complex.thy for an Isar example and
wenzelm@27067
   661
src/HOL/Library/Eval.thy for an ML example.
haftmann@25502
   662
wenzelm@26201
   663
* Indexing of literal facts: be more serious about including only
wenzelm@26201
   664
facts from the visible specification/proof context, but not the
wenzelm@26201
   665
background context (locale etc.).  Affects `prop` notation and method
wenzelm@26201
   666
"fact".  INCOMPATIBILITY: need to name facts explicitly in rare
wenzelm@26201
   667
situations.
wenzelm@26201
   668
wenzelm@26925
   669
* Method "cases", "induct", "coinduct": removed obsolete/undocumented
wenzelm@26925
   670
"(open)" option, which used to expose internal bound variables to the
wenzelm@26925
   671
proof text.
wenzelm@26925
   672
wenzelm@26925
   673
* Isar statements: removed obsolete case "rule_context".
wenzelm@26925
   674
INCOMPATIBILITY, better use explicit fixes/assumes.
wenzelm@26925
   675
wenzelm@26874
   676
* Locale proofs: default proof step now includes 'unfold_locales';
wenzelm@26874
   677
hence 'proof' without argument may be used to unfold locale
wenzelm@26874
   678
predicates.
ballarin@26765
   679
ballarin@26765
   680
haftmann@26762
   681
*** Document preparation ***
haftmann@26762
   682
wenzelm@26914
   683
* Simplified pdfsetup.sty: color/hyperref is used unconditionally for
wenzelm@26914
   684
both pdf and dvi (hyperlinks usually work in xdvi as well); removed
wenzelm@26914
   685
obsolete thumbpdf setup (contemporary PDF viewers do this on the
wenzelm@26914
   686
spot); renamed link color from "darkblue" to "linkcolor" (default
wenzelm@26920
   687
value unchanged, can be redefined via \definecolor); no longer sets
wenzelm@26920
   688
"a4paper" option (unnecessary or even intrusive).
wenzelm@26914
   689
wenzelm@27008
   690
* Antiquotation @{lemma A method} proves proposition A by the given
wenzelm@27008
   691
method (either a method name or a method name plus (optional) method
wenzelm@27008
   692
arguments in parentheses) and prints A just like @{prop A}.
haftmann@26762
   693
haftmann@26762
   694
wenzelm@25464
   695
*** HOL ***
wenzelm@25464
   696
wenzelm@27067
   697
* New primrec package.  Specification syntax conforms in style to
wenzelm@27067
   698
definition/function/....  No separate induction rule is provided.  The
wenzelm@27067
   699
"primrec" command distinguishes old-style and new-style specifications
wenzelm@27067
   700
by syntax.  The former primrec package is now named OldPrimrecPackage.
wenzelm@27067
   701
When adjusting theories, beware: constants stemming from new-style
wenzelm@27067
   702
primrec specifications have authentic syntax.
wenzelm@27067
   703
wenzelm@27067
   704
* Metis prover is now an order of magnitude faster, and also works
wenzelm@27067
   705
with multithreading.
wenzelm@27067
   706
wenzelm@27067
   707
* Metis: the maximum number of clauses that can be produced from a
wenzelm@27067
   708
theorem is now given by the attribute max_clauses.  Theorems that
wenzelm@27067
   709
exceed this number are ignored, with a warning printed.
wenzelm@27067
   710
wenzelm@27067
   711
* Sledgehammer no longer produces structured proofs by default. To
wenzelm@27067
   712
enable, declare [[sledgehammer_full = true]].  Attributes
wenzelm@27067
   713
reconstruction_modulus, reconstruction_sorts renamed
wenzelm@27067
   714
sledgehammer_modulus, sledgehammer_sorts.  INCOMPATIBILITY.
wenzelm@27067
   715
haftmann@27104
   716
* Method "induct_scheme" derives user-specified induction rules
wenzelm@27067
   717
from well-founded induction and completeness of patterns. This factors
wenzelm@27067
   718
out some operations that are done internally by the function package
wenzelm@27067
   719
and makes them available separately.  See
wenzelm@27067
   720
src/HOL/ex/Induction_Scheme.thy for examples.
wenzelm@27067
   721
wenzelm@27067
   722
* More flexible generation of measure functions for termination
wenzelm@27067
   723
proofs: Measure functions can be declared by proving a rule of the
wenzelm@27067
   724
form "is_measure f" and giving it the [measure_function] attribute.
wenzelm@27067
   725
The "is_measure" predicate is logically meaningless (always true), and
wenzelm@27067
   726
just guides the heuristic.  To find suitable measure functions, the
wenzelm@27067
   727
termination prover sets up the goal "is_measure ?f" of the appropriate
wenzelm@27067
   728
type and generates all solutions by prolog-style backwards proof using
wenzelm@27067
   729
the declared rules.
wenzelm@27067
   730
wenzelm@27067
   731
This setup also deals with rules like 
wenzelm@27067
   732
wenzelm@27067
   733
  "is_measure f ==> is_measure (list_size f)"
wenzelm@27067
   734
wenzelm@27067
   735
which accommodates nested datatypes that recurse through lists.
wenzelm@27067
   736
Similar rules are predeclared for products and option types.
wenzelm@27067
   737
berghofe@26964
   738
* Turned the type of sets "'a set" into an abbreviation for "'a => bool"
berghofe@26964
   739
berghofe@26964
   740
  INCOMPATIBILITIES:
berghofe@26964
   741
wenzelm@27008
   742
  - Definitions of overloaded constants on sets have to be replaced by
wenzelm@27008
   743
    definitions on => and bool.
berghofe@26964
   744
berghofe@26964
   745
  - Some definitions of overloaded operators on sets can now be proved
wenzelm@27008
   746
    using the definitions of the operators on => and bool.  Therefore,
wenzelm@27008
   747
    the following theorems have been renamed:
berghofe@26964
   748
berghofe@26964
   749
      subset_def   -> subset_eq
berghofe@26964
   750
      psubset_def  -> psubset_eq
berghofe@26964
   751
      set_diff_def -> set_diff_eq
berghofe@26964
   752
      Compl_def    -> Compl_eq
berghofe@26964
   753
      Sup_set_def  -> Sup_set_eq
berghofe@26964
   754
      Inf_set_def  -> Inf_set_eq
berghofe@26964
   755
      sup_set_def  -> sup_set_eq
berghofe@26964
   756
      inf_set_def  -> inf_set_eq
berghofe@26964
   757
berghofe@26964
   758
  - Due to the incompleteness of the HO unification algorithm, some
berghofe@26964
   759
    rules such as subst may require manual instantiation, if some of
berghofe@26964
   760
    the unknowns in the rule is a set.
berghofe@26964
   761
berghofe@26964
   762
  - Higher order unification and forward proofs:
berghofe@26964
   763
    The proof pattern
berghofe@26964
   764
berghofe@26964
   765
      have "P (S::'a set)" <...>
berghofe@26964
   766
      then have "EX S. P S" ..
berghofe@26964
   767
wenzelm@27008
   768
    no longer works (due to the incompleteness of the HO unification
wenzelm@27008
   769
    algorithm) and must be replaced by the pattern
berghofe@26964
   770
berghofe@26964
   771
      have "EX S. P S"
berghofe@26964
   772
      proof
berghofe@26964
   773
        show "P S" <...>
berghofe@26964
   774
      qed
berghofe@26964
   775
berghofe@26964
   776
  - Calculational reasoning with subst (or similar rules):
berghofe@26964
   777
    The proof pattern
berghofe@26964
   778
berghofe@26964
   779
      have "P (S::'a set)" <...>
berghofe@26964
   780
      also have "S = T" <...>
berghofe@26964
   781
      finally have "P T" .
berghofe@26964
   782
wenzelm@27008
   783
    no longer works (for similar reasons as the previous example) and
wenzelm@27008
   784
    must be replaced by something like
berghofe@26964
   785
berghofe@26964
   786
      have "P (S::'a set)" <...>
berghofe@26964
   787
      moreover have "S = T" <...>
berghofe@26964
   788
      ultimately have "P T" by simp
berghofe@26964
   789
berghofe@26964
   790
  - Tactics or packages written in ML code:
berghofe@26964
   791
    Code performing pattern matching on types via
berghofe@26964
   792
berghofe@26964
   793
      Type ("set", [T]) => ...
berghofe@26964
   794
wenzelm@27008
   795
    must be rewritten. Moreover, functions like strip_type or
wenzelm@27008
   796
    binder_types no longer return the right value when applied to a
wenzelm@27008
   797
    type of the form
berghofe@26964
   798
berghofe@26964
   799
      T1 => ... => Tn => U => bool
berghofe@26964
   800
berghofe@26964
   801
    rather than
berghofe@26964
   802
berghofe@26964
   803
      T1 => ... => Tn => U set
berghofe@26964
   804
wenzelm@26874
   805
* Merged theories Wellfounded_Recursion, Accessible_Part and
wenzelm@27067
   806
Wellfounded_Relations to theory Wellfounded.
krauss@26748
   807
haftmann@26513
   808
* Explicit class "eq" for executable equality.  INCOMPATIBILITY.
haftmann@26513
   809
wenzelm@26874
   810
* Class finite no longer treats UNIV as class parameter.  Use class
wenzelm@26874
   811
enum from theory Library/Enum instead to achieve a similar effect.
haftmann@26445
   812
INCOMPATIBILITY.
haftmann@26445
   813
wenzelm@26874
   814
* Theory List: rule list_induct2 now has explicitly named cases "Nil"
wenzelm@26874
   815
and "Cons".  INCOMPATIBILITY.
wenzelm@26874
   816
wenzelm@26422
   817
* HOL (and FOL): renamed variables in rules imp_elim and swap.
wenzelm@26422
   818
Potential INCOMPATIBILITY.
wenzelm@26422
   819
wenzelm@26874
   820
* Theory Product_Type: duplicated lemmas split_Pair_apply and
wenzelm@26874
   821
injective_fst_snd removed, use split_eta and prod_eqI instead.
wenzelm@26874
   822
Renamed upd_fst to apfst and upd_snd to apsnd.  INCOMPATIBILITY.
haftmann@26355
   823
wenzelm@26335
   824
* Theory Nat: removed redundant lemmas that merely duplicate lemmas of
wenzelm@26335
   825
the same name in theory Orderings:
wenzelm@26335
   826
wenzelm@26335
   827
  less_trans
wenzelm@26335
   828
  less_linear
wenzelm@26335
   829
  le_imp_less_or_eq
wenzelm@26335
   830
  le_less_trans
wenzelm@26335
   831
  less_le_trans
wenzelm@26335
   832
  less_not_sym
wenzelm@26335
   833
  less_asym
wenzelm@26335
   834
wenzelm@26335
   835
Renamed less_imp_le to less_imp_le_nat, and less_irrefl to
wenzelm@26335
   836
less_irrefl_nat.  Potential INCOMPATIBILITY due to more general types
wenzelm@26335
   837
and different variable names.
wenzelm@26315
   838
haftmann@26231
   839
* Library/Option_ord.thy: Canonical order on option type.
haftmann@26231
   840
wenzelm@27008
   841
* Library/RBT.thy: Red-black trees, an efficient implementation of
wenzelm@27008
   842
finite maps.
krauss@26197
   843
haftmann@26231
   844
* Library/Countable.thy: Type class for countable types.
haftmann@26231
   845
wenzelm@26180
   846
* Theory Int: The representation of numerals has changed.  The infix
wenzelm@26180
   847
operator BIT and the bit datatype with constructors B0 and B1 have
wenzelm@26180
   848
disappeared.  INCOMPATIBILITY, use "Int.Bit0 x" and "Int.Bit1 y" in
wenzelm@26180
   849
place of "x BIT bit.B0" and "y BIT bit.B1", respectively.  Theorems
wenzelm@26180
   850
involving BIT, B0, or B1 have been renamed with "Bit0" or "Bit1"
wenzelm@26180
   851
accordingly.
wenzelm@26180
   852
wenzelm@26180
   853
* Theory Nat: definition of <= and < on natural numbers no longer
wenzelm@26180
   854
depend on well-founded relations.  INCOMPATIBILITY.  Definitions
wenzelm@26180
   855
le_def and less_def have disappeared.  Consider lemmas not_less
wenzelm@26180
   856
[symmetric, where ?'a = nat] and less_eq [symmetric] instead.
wenzelm@26180
   857
wenzelm@26180
   858
* Theory Finite_Set: locales ACf, ACe, ACIf, ACIfSL and ACIfSLlin
wenzelm@26180
   859
(whose purpose mainly is for various fold_set functionals) have been
wenzelm@26874
   860
abandoned in favor of the existing algebraic classes
wenzelm@26180
   861
ab_semigroup_mult, comm_monoid_mult, ab_semigroup_idem_mult,
wenzelm@26180
   862
lower_semilattice (resp. upper_semilattice) and linorder.
haftmann@26139
   863
INCOMPATIBILITY.
haftmann@26041
   864
wenzelm@26180
   865
* Theory Transitive_Closure: induct and cases rules now declare proper
wenzelm@26180
   866
case_names ("base" and "step").  INCOMPATIBILITY.
wenzelm@26180
   867
wenzelm@26180
   868
* Theorem Inductive.lfp_ordinal_induct generalized to complete
wenzelm@26180
   869
lattices.  The form set-specific version is available as
wenzelm@26180
   870
Inductive.lfp_ordinal_induct_set.
haftmann@26013
   871
wenzelm@26874
   872
* Renamed theorems "power.simps" to "power_int.simps".
wenzelm@27067
   873
INCOMPATIBILITY.
haftmann@25961
   874
wenzelm@26180
   875
* Class semiring_div provides basic abstract properties of semirings
haftmann@25942
   876
with division and modulo operations.  Subsumes former class dvd_mod.
haftmann@25942
   877
wenzelm@26180
   878
* Merged theories IntDef, Numeral and IntArith into unified theory
wenzelm@26180
   879
Int.  INCOMPATIBILITY.
wenzelm@26180
   880
wenzelm@26180
   881
* Theory Library/Code_Index: type "index" now represents natural
wenzelm@26180
   882
numbers rather than integers.  INCOMPATIBILITY.
wenzelm@26180
   883
wenzelm@26180
   884
* New class "uminus" with operation "uminus" (split of from class
wenzelm@26180
   885
"minus" which now only has operation "minus", binary).
haftmann@25919
   886
INCOMPATIBILITY.
haftmann@25919
   887
wenzelm@25522
   888
* Constants "card", "internal_split", "option_map" now with authentic
haftmann@25919
   889
syntax.  INCOMPATIBILITY.
wenzelm@25522
   890
wenzelm@25522
   891
* Definitions subset_def, psubset_def, set_diff_def, Compl_def,
wenzelm@25522
   892
le_bool_def, less_bool_def, le_fun_def, less_fun_def, inf_bool_def,
wenzelm@25522
   893
sup_bool_def, Inf_bool_def, Sup_bool_def, inf_fun_def, sup_fun_def,
wenzelm@25522
   894
Inf_fun_def, Sup_fun_def, inf_set_def, sup_set_def, Inf_set_def,
wenzelm@25522
   895
Sup_set_def, le_def, less_def, option_map_def now with object
haftmann@25919
   896
equality.  INCOMPATIBILITY.
wenzelm@25464
   897
schirmer@25705
   898
* Records. Removed K_record, and replaced it by pure lambda term
wenzelm@25726
   899
%x. c. The simplifier setup is now more robust against eta expansion.
schirmer@25705
   900
INCOMPATIBILITY: in cases explicitly referring to K_record.
wenzelm@25464
   901
wenzelm@27067
   902
* Library/Multiset: {#a, b, c#} abbreviates {#a#} + {#b#} + {#c#}.
wenzelm@27067
   903
wenzelm@27067
   904
* Library/ListVector: new theory of arithmetic vector operations.
wenzelm@27067
   905
wenzelm@27067
   906
* Library/Order_Relation: new theory of various orderings as sets of
wenzelm@27067
   907
pairs.  Defines preorders, partial orders, linear orders and
wenzelm@27067
   908
well-orders on sets and on types.
krauss@26877
   909
wenzelm@25726
   910
krauss@26197
   911
*** ZF ***
krauss@26197
   912
wenzelm@26874
   913
* Renamed some theories to allow to loading both ZF and HOL in the
wenzelm@26874
   914
same session:
wenzelm@26874
   915
wenzelm@26874
   916
  Datatype  -> Datatype_ZF
wenzelm@26874
   917
  Inductive -> Inductive_ZF
wenzelm@26874
   918
  Int       -> Int_ZF
wenzelm@26874
   919
  IntDiv    -> IntDiv_ZF
wenzelm@26874
   920
  Nat       -> Nat_ZF
wenzelm@26874
   921
  List      -> List_ZF
wenzelm@26874
   922
  Main      -> Main_ZF
wenzelm@26874
   923
wenzelm@26874
   924
INCOMPATIBILITY: ZF theories that import individual theories below
wenzelm@26874
   925
Main might need to be adapted.  Regular theory Main is still
wenzelm@26874
   926
available, as trivial extension of Main_ZF.
krauss@26197
   927
krauss@26197
   928
wenzelm@25737
   929
*** ML ***
wenzelm@25737
   930
wenzelm@27067
   931
* ML within Isar: antiquotation @{const name} or @{const
wenzelm@27067
   932
name(typargs)} produces statically-checked Const term.
wenzelm@27067
   933
wenzelm@26401
   934
* Functor NamedThmsFun: data is available to the user as dynamic fact
wenzelm@26724
   935
(of the same name).  Removed obsolete print command.
wenzelm@26401
   936
wenzelm@27067
   937
* Removed obsolete "use_legacy_bindings" function.
wenzelm@26188
   938
wenzelm@25737
   939
* The ``print mode'' is now a thread-local value derived from a global
wenzelm@25737
   940
template (the former print_mode reference), thus access becomes
wenzelm@25737
   941
non-critical.  The global print_mode reference is for session
wenzelm@25737
   942
management only; user-code should use print_mode_value,
wenzelm@25737
   943
print_mode_active, PrintMode.setmp etc.  INCOMPATIBILITY.
wenzelm@25737
   944
wenzelm@26874
   945
* Functions system/system_out provide a robust way to invoke external
wenzelm@29161
   946
shell commands, with propagation of interrupts (requires Poly/ML
wenzelm@29161
   947
5.2.1).  Do not use OS.Process.system etc. from the basis library!
wenzelm@26222
   948
wenzelm@25737
   949
wenzelm@25626
   950
*** System ***
wenzelm@25626
   951
wenzelm@25971
   952
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs ---
wenzelm@25971
   953
in accordance with Proof General 3.7, which prefers GNU emacs.
wenzelm@25970
   954
wenzelm@25626
   955
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm@25626
   956
optional line editor may be specified via ISABELLE_LINE_EDITOR
wenzelm@25626
   957
setting, the default settings attempt to locate "ledit" and "rlwrap".
wenzelm@25626
   958
wenzelm@25651
   959
* isatool browser now works with Cygwin as well, using general
wenzelm@25651
   960
"javapath" function defined in Isabelle process environment.
wenzelm@25651
   961
wenzelm@27067
   962
* YXML notation provides a simple and efficient alternative to
wenzelm@27067
   963
standard XML transfer syntax.  See src/Pure/General/yxml.ML and
wenzelm@27067
   964
isatool yxml as described in the Isabelle system manual.
wenzelm@25651
   965
wenzelm@25652
   966
* JVM class isabelle.IsabelleProcess (located in Isabelle/lib/classes)
wenzelm@25651
   967
provides general wrapper for managing an Isabelle process in a robust
wenzelm@25651
   968
fashion, with ``cooked'' output from stdin/stderr.
wenzelm@25651
   969
wenzelm@25855
   970
* Rudimentary Isabelle plugin for jEdit (see Isabelle/lib/jedit),
wenzelm@25855
   971
based on Isabelle/JVM process wrapper (see Isabelle/lib/classes).
wenzelm@25855
   972
wenzelm@27067
   973
* Removed obsolete THIS_IS_ISABELLE_BUILD feature.  NB: the documented
wenzelm@27067
   974
way of changing the user's settings is via
wenzelm@27067
   975
ISABELLE_HOME_USER/etc/settings, which is a fully featured bash
wenzelm@27067
   976
script.
wenzelm@27067
   977
wenzelm@27067
   978
* Multithreading.max_threads := 0 refers to the number of actual CPU
wenzelm@27067
   979
cores of the underlying machine, which is a good starting point for
wenzelm@27067
   980
optimal performance tuning.  The corresponding usedir option -M allows
wenzelm@27067
   981
"max" as an alias for "0".  WARNING: does not work on certain versions
wenzelm@27067
   982
of Mac OS (with Poly/ML 5.1).
wenzelm@27067
   983
wenzelm@27067
   984
* isabelle-process: non-ML sessions are run with "nice", to reduce the
wenzelm@27067
   985
adverse effect of Isabelle flooding interactive front-ends (notably
wenzelm@27067
   986
ProofGeneral / XEmacs).
wenzelm@27067
   987
wenzelm@25626
   988
wenzelm@25464
   989
wenzelm@25429
   990
New in Isabelle2007 (November 2007)
wenzelm@25429
   991
-----------------------------------
wenzelm@17754
   992
wenzelm@17754
   993
*** General ***
wenzelm@17754
   994
wenzelm@22826
   995
* More uniform information about legacy features, notably a
wenzelm@22826
   996
warning/error of "Legacy feature: ...", depending on the state of the
wenzelm@23367
   997
tolerate_legacy_features flag (default true). FUTURE INCOMPATIBILITY:
wenzelm@23367
   998
legacy features will disappear eventually.
wenzelm@22826
   999
wenzelm@17918
  1000
* Theory syntax: the header format ``theory A = B + C:'' has been
wenzelm@17918
  1001
discontinued in favour of ``theory A imports B C begin''.  Use isatool
wenzelm@17918
  1002
fixheaders to convert existing theory files.  INCOMPATIBILITY.
wenzelm@17918
  1003
wenzelm@17918
  1004
* Theory syntax: the old non-Isar theory file format has been
wenzelm@17918
  1005
discontinued altogether.  Note that ML proof scripts may still be used
wenzelm@17918
  1006
with Isar theories; migration is usually quite simple with the ML
wenzelm@17918
  1007
function use_legacy_bindings.  INCOMPATIBILITY.
wenzelm@17918
  1008
wenzelm@22871
  1009
* Theory syntax: some popular names (e.g. 'class', 'declaration',
wenzelm@22871
  1010
'fun', 'help', 'if') are now keywords.  INCOMPATIBILITY, use double
wenzelm@22871
  1011
quotes.
wenzelm@19814
  1012
wenzelm@23888
  1013
* Theory loader: be more serious about observing the static theory
wenzelm@23888
  1014
header specifications (including optional directories), but not the
wenzelm@24172
  1015
accidental file locations of previously successful loads.  The strict
wenzelm@24172
  1016
update policy of former update_thy is now already performed by
wenzelm@24172
  1017
use_thy, so the former has been removed; use_thys updates several
wenzelm@24172
  1018
theories simultaneously, just as 'imports' within a theory header
wenzelm@24172
  1019
specification, but without merging the results.  Potential
wenzelm@24172
  1020
INCOMPATIBILITY: may need to refine theory headers and commands
wenzelm@24172
  1021
ROOT.ML which depend on load order.
wenzelm@23888
  1022
wenzelm@23888
  1023
* Theory loader: optional support for content-based file
wenzelm@23888
  1024
identification, instead of the traditional scheme of full physical
wenzelm@23889
  1025
path plus date stamp; configured by the ISABELLE_FILE_IDENT setting
wenzelm@23888
  1026
(cf. the system manual).  The new scheme allows to work with
wenzelm@23888
  1027
non-finished theories in persistent session images, such that source
wenzelm@23888
  1028
files may be moved later on without requiring reloads.
wenzelm@23888
  1029
wenzelm@24187
  1030
* Theory loader: old-style ML proof scripts being *attached* to a thy
wenzelm@24187
  1031
file (with the same base name as the theory) are considered a legacy
wenzelm@24800
  1032
feature, which will disappear eventually. Even now, the theory loader
wenzelm@24800
  1033
no longer maintains dependencies on such files.
wenzelm@24800
  1034
wenzelm@24800
  1035
* Syntax: the scope for resolving ambiguities via type-inference is
wenzelm@24800
  1036
now limited to individual terms, instead of whole simultaneous
wenzelm@24234
  1037
specifications as before. This greatly reduces the complexity of the
wenzelm@24234
  1038
syntax module and improves flexibility by separating parsing and
wenzelm@24234
  1039
type-checking. INCOMPATIBILITY: additional type-constraints (explicit
wenzelm@24234
  1040
'fixes' etc.) are required in rare situations.
wenzelm@24234
  1041
wenzelm@25034
  1042
* Syntax: constants introduced by new-style packages ('definition',
wenzelm@25034
  1043
'abbreviation' etc.) are passed through the syntax module in
wenzelm@25034
  1044
``authentic mode''. This means that associated mixfix annotations
wenzelm@25034
  1045
really stick to such constants, independently of potential name space
wenzelm@25034
  1046
ambiguities introduced later on. INCOMPATIBILITY: constants in parse
wenzelm@25034
  1047
trees are represented slightly differently, may need to adapt syntax
wenzelm@25034
  1048
translations accordingly. Use CONST marker in 'translations' and
wenzelm@25034
  1049
@{const_syntax} antiquotation in 'parse_translation' etc.
wenzelm@25034
  1050
wenzelm@17981
  1051
* Legacy goal package: reduced interface to the bare minimum required
wenzelm@17981
  1052
to keep existing proof scripts running.  Most other user-level
wenzelm@17981
  1053
functions are now part of the OldGoals structure, which is *not* open
wenzelm@17981
  1054
by default (consider isatool expandshort before open OldGoals).
wenzelm@17981
  1055
Removed top_sg, prin, printyp, pprint_term/typ altogether, because
wenzelm@17981
  1056
these tend to cause confusion about the actual goal (!) context being
wenzelm@17981
  1057
used here, which is not necessarily the same as the_context().
wenzelm@17918
  1058
wenzelm@23379
  1059
* Command 'find_theorems': supports "*" wild-card in "name:"
wenzelm@23379
  1060
criterion; "with_dups" option.  Certain ProofGeneral versions might
wenzelm@23379
  1061
support a specific search form (see ProofGeneral/CHANGES).
webertj@22965
  1062
wenzelm@20370
  1063
* The ``prems limit'' option (cf. ProofContext.prems_limit) is now -1
wenzelm@20370
  1064
by default, which means that "prems" (and also "fixed variables") are
wenzelm@20370
  1065
suppressed from proof state output.  Note that the ProofGeneral
wenzelm@20370
  1066
settings mechanism allows to change and save options persistently, but
wenzelm@20370
  1067
older versions of Isabelle will fail to start up if a negative prems
wenzelm@20370
  1068
limit is imposed.
wenzelm@20370
  1069
wenzelm@21308
  1070
* Local theory targets may be specified by non-nested blocks of
wenzelm@21308
  1071
``context/locale/class ... begin'' followed by ``end''.  The body may
wenzelm@21308
  1072
contain definitions, theorems etc., including any derived mechanism
wenzelm@21308
  1073
that has been implemented on top of these primitives.  This concept
wenzelm@21308
  1074
generalizes the existing ``theorem (in ...)'' towards more versatility
wenzelm@21308
  1075
and scalability.
wenzelm@21308
  1076
wenzelm@21960
  1077
* Proof General interface: proper undo of final 'end' command;
wenzelm@21960
  1078
discontinued Isabelle/classic mode (ML proof scripts).
wenzelm@21960
  1079
wenzelm@17754
  1080
wenzelm@17865
  1081
*** Document preparation ***
wenzelm@17865
  1082
wenzelm@21717
  1083
* Added antiquotation @{theory name} which prints the given name,
wenzelm@21717
  1084
after checking that it refers to a valid ancestor theory in the
wenzelm@21717
  1085
current context.
haftmann@21339
  1086
wenzelm@17869
  1087
* Added antiquotations @{ML_type text} and @{ML_struct text} which
wenzelm@17869
  1088
check the given source text as ML type/structure, printing verbatim.
wenzelm@17865
  1089
wenzelm@21717
  1090
* Added antiquotation @{abbrev "c args"} which prints the abbreviation
wenzelm@21717
  1091
"c args == rhs" given in the current context.  (Any number of
wenzelm@21735
  1092
arguments may be given on the LHS.)
wenzelm@21717
  1093
wenzelm@21717
  1094
wenzelm@17779
  1095
*** Pure ***
wenzelm@17779
  1096
wenzelm@24800
  1097
* The 'class' package offers a combination of axclass and locale to
wenzelm@25129
  1098
achieve Haskell-like type classes in Isabelle.  Definitions and
wenzelm@25129
  1099
theorems within a class context produce both relative results (with
wenzelm@25129
  1100
implicit parameters according to the locale context), and polymorphic
wenzelm@25129
  1101
constants with qualified polymorphism (according to the class
wenzelm@25129
  1102
context).  Within the body context of a 'class' target, a separate
wenzelm@25129
  1103
syntax layer ("user space type system") takes care of converting
wenzelm@25129
  1104
between global polymorphic consts and internal locale representation.
wenzelm@25177
  1105
See src/HOL/ex/Classpackage.thy for examples (as well as main HOL).
haftmann@25184
  1106
"isatool doc classes" provides a tutorial.
wenzelm@20807
  1107
haftmann@25199
  1108
* Generic code generator framework allows to generate executable
wenzelm@24800
  1109
code for ML and Haskell (including Isabelle classes).  A short usage
wenzelm@24800
  1110
sketch:
haftmann@20188
  1111
haftmann@20188
  1112
    internal compilation:
haftmann@25199
  1113
        export_code <list of constants (term syntax)> in SML
haftmann@20453
  1114
    writing SML code to a file:
haftmann@25199
  1115
        export_code <list of constants (term syntax)> in SML <filename>
haftmann@22735
  1116
    writing OCaml code to a file:
haftmann@25199
  1117
        export_code <list of constants (term syntax)> in OCaml <filename>
haftmann@20188
  1118
    writing Haskell code to a bunch of files:
haftmann@25199
  1119
        export_code <list of constants (term syntax)> in Haskell <filename>
haftmann@25199
  1120
haftmann@25199
  1121
    evaluating closed propositions to True/False using code generation:
haftmann@25184
  1122
        method ``eval''
haftmann@25184
  1123
haftmann@25184
  1124
Reasonable default setup of framework in HOL.
haftmann@20453
  1125
haftmann@20453
  1126
Theorem attributs for selecting and transforming function equations theorems:
haftmann@20453
  1127
haftmann@22845
  1128
    [code fun]:        select a theorem as function equation for a specific constant
haftmann@22845
  1129
    [code fun del]:    deselect a theorem as function equation for a specific constant
haftmann@22845
  1130
    [code inline]:     select an equation theorem for unfolding (inlining) in place
haftmann@22845
  1131
    [code inline del]: deselect an equation theorem for unfolding (inlining) in place
haftmann@20453
  1132
haftmann@22735
  1133
User-defined serializations (target in {SML, OCaml, Haskell}):
haftmann@20453
  1134
haftmann@20453
  1135
    code_const <and-list of constants (term syntax)>
haftmann@20453
  1136
      {(target) <and-list of const target syntax>}+
haftmann@20453
  1137
haftmann@20453
  1138
    code_type <and-list of type constructors>
haftmann@20453
  1139
      {(target) <and-list of type target syntax>}+
haftmann@20453
  1140
haftmann@20453
  1141
    code_instance <and-list of instances>
haftmann@20453
  1142
      {(target)}+
haftmann@20453
  1143
        where instance ::= <type constructor> :: <class>
haftmann@20453
  1144
haftmann@20453
  1145
    code_class <and_list of classes>
haftmann@20453
  1146
      {(target) <and-list of class target syntax>}+
haftmann@20453
  1147
        where class target syntax ::= <class name> {where {<classop> == <target syntax>}+}?
haftmann@20453
  1148
haftmann@25199
  1149
code_instance and code_class only are effective to target Haskell.
haftmann@22735
  1150
wenzelm@25177
  1151
For example usage see src/HOL/ex/Codegenerator.thy and
wenzelm@25177
  1152
src/HOL/ex/Codegenerator_Pretty.thy.  A separate tutorial on code
wenzelm@24800
  1153
generation from Isabelle/HOL theories is available via "isatool doc
wenzelm@24800
  1154
codegen".
haftmann@20188
  1155
wenzelm@25129
  1156
* Code generator: consts in 'consts_code' Isar commands are now
wenzelm@25129
  1157
referred to by usual term syntax (including optional type
wenzelm@25129
  1158
annotations).
wenzelm@25129
  1159
wenzelm@19254
  1160
* Command 'no_translations' removes translation rules from theory
wenzelm@19254
  1161
syntax.
wenzelm@19254
  1162
wenzelm@19625
  1163
* Overloaded definitions are now actually checked for acyclic
wenzelm@19714
  1164
dependencies.  The overloading scheme is slightly more general than
wenzelm@19714
  1165
that of Haskell98, although Isabelle does not demand an exact
wenzelm@19714
  1166
correspondence to type class and instance declarations.
wenzelm@19714
  1167
INCOMPATIBILITY, use ``defs (unchecked overloaded)'' to admit more
wenzelm@19714
  1168
exotic versions of overloading -- at the discretion of the user!
wenzelm@19711
  1169
wenzelm@19711
  1170
Polymorphic constants are represented via type arguments, i.e. the
wenzelm@19711
  1171
instantiation that matches an instance against the most general
wenzelm@19711
  1172
declaration given in the signature.  For example, with the declaration
wenzelm@19711
  1173
c :: 'a => 'a => 'a, an instance c :: nat => nat => nat is represented
wenzelm@19711
  1174
as c(nat).  Overloading is essentially simultaneous structural
wenzelm@19711
  1175
recursion over such type arguments.  Incomplete specification patterns
wenzelm@19714
  1176
impose global constraints on all occurrences, e.g. c('a * 'a) on the
wenzelm@19715
  1177
LHS means that more general c('a * 'b) will be disallowed on any RHS.
wenzelm@19714
  1178
Command 'print_theory' outputs the normalized system of recursive
wenzelm@19714
  1179
equations, see section "definitions".
wenzelm@19625
  1180
wenzelm@24086
  1181
* Configuration options are maintained within the theory or proof
wenzelm@24086
  1182
context (with name and type bool/int/string), providing a very simple
wenzelm@24086
  1183
interface to a poor-man's version of general context data.  Tools may
wenzelm@24110
  1184
declare options in ML (e.g. using Attrib.config_int) and then refer to
wenzelm@24110
  1185
these values using Config.get etc.  Users may change options via an
wenzelm@24110
  1186
associated attribute of the same name.  This form of context
wenzelm@24110
  1187
declaration works particularly well with commands 'declare' or
wenzelm@24110
  1188
'using', for example ``declare [[foo = 42]]''.  Thus it has become
wenzelm@24110
  1189
very easy to avoid global references, which would not observe Isar
wenzelm@24110
  1190
toplevel undo/redo and fail to work with multithreading.
wenzelm@24086
  1191
wenzelm@24172
  1192
Various global ML references of Pure and HOL have been turned into
wenzelm@24172
  1193
configuration options:
wenzelm@24172
  1194
wenzelm@24172
  1195
  Unify.search_bound		unify_search_bound
wenzelm@24172
  1196
  Unify.trace_bound		unify_trace_bound
wenzelm@24172
  1197
  Unify.trace_simp		unify_trace_simp
wenzelm@24172
  1198
  Unify.trace_types		unify_trace_types
wenzelm@24172
  1199
  Simplifier.simp_depth_limit	simp_depth_limit
wenzelm@24172
  1200
  Blast.depth_limit		blast_depth_limit
wenzelm@24172
  1201
  DatatypeProp.dtK		datatype_distinctness_limit
wenzelm@24172
  1202
  fast_arith_neq_limit  	fast_arith_neq_limit
wenzelm@24172
  1203
  fast_arith_split_limit	fast_arith_split_limit
wenzelm@24172
  1204
wenzelm@24086
  1205
* Named collections of theorems may be easily installed as context
wenzelm@24800
  1206
data using the functor NamedThmsFun (see also
wenzelm@24086
  1207
src/Pure/Tools/named_thms.ML).  The user may add or delete facts via
wenzelm@24110
  1208
attributes; there is also a toplevel print command.  This facility is
wenzelm@24110
  1209
just a common case of general context data, which is the preferred way
wenzelm@24110
  1210
for anything more complex than just a list of facts in canonical
wenzelm@24110
  1211
order.
wenzelm@24086
  1212
wenzelm@24032
  1213
* Isar: command 'declaration' augments a local theory by generic
wenzelm@24032
  1214
declaration functions written in ML.  This enables arbitrary content
wenzelm@24032
  1215
being added to the context, depending on a morphism that tells the
wenzelm@24032
  1216
difference of the original declaration context wrt. the application
wenzelm@24032
  1217
context encountered later on.
wenzelm@24032
  1218
wenzelm@24032
  1219
* Isar: proper interfaces for simplification procedures.  Command
wenzelm@24032
  1220
'simproc_setup' declares named simprocs (with match patterns, and body
wenzelm@24032
  1221
text in ML).  Attribute "simproc" adds/deletes simprocs in the current
wenzelm@24032
  1222
context.  ML antiquotation @{simproc name} retrieves named simprocs.
wenzelm@24032
  1223
wenzelm@24032
  1224
* Isar: an extra pair of brackets around attribute declarations
wenzelm@24032
  1225
abbreviates a theorem reference involving an internal dummy fact,
wenzelm@24032
  1226
which will be ignored later --- only the effect of the attribute on
wenzelm@24032
  1227
the background context will persist.  This form of in-place
wenzelm@24032
  1228
declarations is particularly useful with commands like 'declare' and
wenzelm@24032
  1229
'using', for example ``have A using [[simproc a]] by simp''.
wenzelm@24032
  1230
wenzelm@23369
  1231
* Isar: method "assumption" (and implicit closing of subproofs) now
wenzelm@23369
  1232
takes simple non-atomic goal assumptions into account: after applying
wenzelm@23369
  1233
an assumption as a rule the resulting subgoals are solved by atomic
wenzelm@23369
  1234
assumption steps.  This is particularly useful to finish 'obtain'
wenzelm@23369
  1235
goals, such as "!!x. (!!x. P x ==> thesis) ==> P x ==> thesis",
wenzelm@23369
  1236
without referring to the original premise "!!x. P x ==> thesis" in the
wenzelm@23369
  1237
Isar proof context.  POTENTIAL INCOMPATIBILITY: method "assumption" is
wenzelm@23369
  1238
more permissive.
wenzelm@23369
  1239
wenzelm@23369
  1240
* Isar: implicit use of prems from the Isar proof context is
wenzelm@23369
  1241
considered a legacy feature.  Common applications like ``have A .''
wenzelm@23369
  1242
may be replaced by ``have A by fact'' or ``note `A`''.  In general,
wenzelm@23369
  1243
referencing facts explicitly here improves readability and
wenzelm@23369
  1244
maintainability of proof texts.
wenzelm@23369
  1245
wenzelm@17865
  1246
* Isar: improper proof element 'guess' is like 'obtain', but derives
wenzelm@17865
  1247
the obtained context from the course of reasoning!  For example:
wenzelm@17865
  1248
wenzelm@17865
  1249
  assume "EX x y. A x & B y"   -- "any previous fact"
wenzelm@17865
  1250
  then guess x and y by clarify
wenzelm@17865
  1251
wenzelm@17865
  1252
This technique is potentially adventurous, depending on the facts and
wenzelm@17865
  1253
proof tools being involved here.
wenzelm@17865
  1254
wenzelm@18020
  1255
* Isar: known facts from the proof context may be specified as literal
wenzelm@18020
  1256
propositions, using ASCII back-quote syntax.  This works wherever
wenzelm@18020
  1257
named facts used to be allowed so far, in proof commands, proof
wenzelm@18020
  1258
methods, attributes etc.  Literal facts are retrieved from the context
wenzelm@18020
  1259
according to unification of type and term parameters.  For example,
wenzelm@18020
  1260
provided that "A" and "A ==> B" and "!!x. P x ==> Q x" are known
wenzelm@18020
  1261
theorems in the current context, then these are valid literal facts:
wenzelm@18020
  1262
`A` and `A ==> B` and `!!x. P x ==> Q x" as well as `P a ==> Q a` etc.
wenzelm@18020
  1263
wenzelm@18020
  1264
There is also a proof method "fact" which does the same composition
wenzelm@18044
  1265
for explicit goal states, e.g. the following proof texts coincide with
wenzelm@18044
  1266
certain special cases of literal facts:
wenzelm@18020
  1267
wenzelm@18020
  1268
  have "A" by fact                 ==  note `A`
wenzelm@18020
  1269
  have "A ==> B" by fact           ==  note `A ==> B`
wenzelm@18020
  1270
  have "!!x. P x ==> Q x" by fact  ==  note `!!x. P x ==> Q x`
wenzelm@18020
  1271
  have "P a ==> Q a" by fact       ==  note `P a ==> Q a`
wenzelm@18020
  1272
wenzelm@20118
  1273
* Isar: ":" (colon) is no longer a symbolic identifier character in
wenzelm@20118
  1274
outer syntax.  Thus symbolic identifiers may be used without
wenzelm@20118
  1275
additional white space in declarations like this: ``assume *: A''.
wenzelm@20118
  1276
wenzelm@20013
  1277
* Isar: 'print_facts' prints all local facts of the current context,
wenzelm@20013
  1278
both named and unnamed ones.
wenzelm@20013
  1279
wenzelm@18308
  1280
* Isar: 'def' now admits simultaneous definitions, e.g.:
wenzelm@18308
  1281
wenzelm@18308
  1282
  def x == "t" and y == "u"
wenzelm@18308
  1283
wenzelm@18540
  1284
* Isar: added command 'unfolding', which is structurally similar to
wenzelm@18540
  1285
'using', but affects both the goal state and facts by unfolding given
wenzelm@18815
  1286
rewrite rules.  Thus many occurrences of the 'unfold' method or
wenzelm@18540
  1287
'unfolded' attribute may be replaced by first-class proof text.
wenzelm@18540
  1288
wenzelm@18815
  1289
* Isar: methods 'unfold' / 'fold', attributes 'unfolded' / 'folded',
wenzelm@18815
  1290
and command 'unfolding' now all support object-level equalities
wenzelm@18815
  1291
(potentially conditional).  The underlying notion of rewrite rule is
wenzelm@18815
  1292
analogous to the 'rule_format' attribute, but *not* that of the
wenzelm@18815
  1293
Simplifier (which is usually more generous).
wenzelm@18815
  1294
kleing@24238
  1295
* Isar: the new attribute [rotated n] (default n = 1) rotates the
kleing@24238
  1296
premises of a theorem by n. Useful in conjunction with drule.
kleing@24238
  1297
wenzelm@19220
  1298
* Isar: the goal restriction operator [N] (default N = 1) evaluates a
wenzelm@19220
  1299
method expression within a sandbox consisting of the first N
wenzelm@19240
  1300
sub-goals, which need to exist.  For example, ``simp_all [3]''
wenzelm@19240
  1301
simplifies the first three sub-goals, while (rule foo, simp_all)[]
wenzelm@19240
  1302
simplifies all new goals that emerge from applying rule foo to the
wenzelm@19240
  1303
originally first one.
wenzelm@19220
  1304
wenzelm@19814
  1305
* Isar: schematic goals are no longer restricted to higher-order
wenzelm@19814
  1306
patterns; e.g. ``lemma "?P(?x)" by (rule TrueI)'' now works as
wenzelm@19814
  1307
expected.
wenzelm@19814
  1308
wenzelm@18901
  1309
* Isar: the conclusion of a long theorem statement is now either
wenzelm@18901
  1310
'shows' (a simultaneous conjunction, as before), or 'obtains'
wenzelm@18901
  1311
(essentially a disjunction of cases with local parameters and
wenzelm@18901
  1312
assumptions).  The latter allows to express general elimination rules
wenzelm@18910
  1313
adequately; in this notation common elimination rules look like this:
wenzelm@18901
  1314
wenzelm@18901
  1315
  lemma exE:    -- "EX x. P x ==> (!!x. P x ==> thesis) ==> thesis"
wenzelm@18901
  1316
    assumes "EX x. P x"
wenzelm@18901
  1317
    obtains x where "P x"
wenzelm@18901
  1318
wenzelm@18901
  1319
  lemma conjE:  -- "A & B ==> (A ==> B ==> thesis) ==> thesis"
wenzelm@18901
  1320
    assumes "A & B"
wenzelm@18901
  1321
    obtains A and B
wenzelm@18901
  1322
wenzelm@18901
  1323
  lemma disjE:  -- "A | B ==> (A ==> thesis) ==> (B ==> thesis) ==> thesis"
wenzelm@18901
  1324
    assumes "A | B"
wenzelm@18901
  1325
    obtains
wenzelm@18901
  1326
      A
wenzelm@18901
  1327
    | B
wenzelm@18901
  1328
wenzelm@18910
  1329
The subsequent classical rules even refer to the formal "thesis"
wenzelm@18901
  1330
explicitly:
wenzelm@18901
  1331
wenzelm@18901
  1332
  lemma classical:     -- "(~ thesis ==> thesis) ==> thesis"
wenzelm@18901
  1333
    obtains "~ thesis"
wenzelm@18901
  1334
wenzelm@18910
  1335
  lemma Peirce's_Law:  -- "((thesis ==> something) ==> thesis) ==> thesis"
wenzelm@18910
  1336
    obtains "thesis ==> something"
wenzelm@18901
  1337
wenzelm@18901
  1338
The actual proof of an 'obtains' statement is analogous to that of the
wenzelm@18910
  1339
Isar proof element 'obtain', only that there may be several cases.
wenzelm@18910
  1340
Optional case names may be specified in parentheses; these will be
wenzelm@18910
  1341
available both in the present proof and as annotations in the
wenzelm@18910
  1342
resulting rule, for later use with the 'cases' method (cf. attribute
wenzelm@18910
  1343
case_names).
wenzelm@18901
  1344
wenzelm@21447
  1345
* Isar: the assumptions of a long theorem statement are available as
wenzelm@21447
  1346
"assms" fact in the proof context.  This is more appropriate than the
wenzelm@21447
  1347
(historical) "prems", which refers to all assumptions of the current
wenzelm@21447
  1348
context, including those from the target locale, proof body etc.
wenzelm@21447
  1349
wenzelm@19263
  1350
* Isar: 'print_statement' prints theorems from the current theory or
wenzelm@19263
  1351
proof context in long statement form, according to the syntax of a
wenzelm@19263
  1352
top-level lemma.
wenzelm@19263
  1353
wenzelm@18901
  1354
* Isar: 'obtain' takes an optional case name for the local context
wenzelm@18901
  1355
introduction rule (default "that").
wenzelm@18901
  1356
wenzelm@19587
  1357
* Isar: removed obsolete 'concl is' patterns.  INCOMPATIBILITY, use
wenzelm@19587
  1358
explicit (is "_ ==> ?foo") in the rare cases where this still happens
wenzelm@19587
  1359
to occur.
wenzelm@19587
  1360
wenzelm@19682
  1361
* Pure: syntax "CONST name" produces a fully internalized constant
wenzelm@19682
  1362
according to the current context.  This is particularly useful for
wenzelm@19682
  1363
syntax translations that should refer to internal constant
wenzelm@19682
  1364
representations independently of name spaces.
wenzelm@19682
  1365
wenzelm@21537
  1366
* Pure: syntax constant for foo (binder "FOO ") is called "foo_binder"
wenzelm@21537
  1367
instead of "FOO ". This allows multiple binder declarations to coexist
wenzelm@21537
  1368
in the same context.  INCOMPATIBILITY.
wenzelm@21537
  1369
wenzelm@21209
  1370
* Isar/locales: 'notation' provides a robust interface to the 'syntax'
wenzelm@21209
  1371
primitive that also works in a locale context (both for constants and
wenzelm@24950
  1372
fixed variables). Type declaration and internal syntactic representation
wenzelm@24950
  1373
of given constants retrieved from the context. Likewise, the
wenzelm@24950
  1374
'no_notation' command allows to remove given syntax annotations from the
wenzelm@24950
  1375
current context.
wenzelm@19682
  1376
wenzelm@19665
  1377
* Isar/locales: new derived specification elements 'axiomatization',
wenzelm@19665
  1378
'definition', 'abbreviation', which support type-inference, admit
wenzelm@19083
  1379
object-level specifications (equality, equivalence).  See also the
wenzelm@19083
  1380
isar-ref manual.  Examples:
wenzelm@19081
  1381
wenzelm@19665
  1382
  axiomatization
wenzelm@21595
  1383
    eq  (infix "===" 50) where
wenzelm@21595
  1384
    eq_refl: "x === x" and eq_subst: "x === y ==> P x ==> P y"
wenzelm@21595
  1385
wenzelm@21595
  1386
  definition "f x y = x + y + 1"
wenzelm@21595
  1387
  definition g where "g x = f x x"
wenzelm@19081
  1388
wenzelm@19363
  1389
  abbreviation
wenzelm@21595
  1390
    neq  (infix "=!=" 50) where
wenzelm@19363
  1391
    "x =!= y == ~ (x === y)"
wenzelm@19081
  1392
wenzelm@19083
  1393
These specifications may be also used in a locale context.  Then the
wenzelm@19083
  1394
constants being introduced depend on certain fixed parameters, and the
wenzelm@19083
  1395
constant name is qualified by the locale base name.  An internal
wenzelm@19083
  1396
abbreviation takes care for convenient input and output, making the
wenzelm@19088
  1397
parameters implicit and using the original short name.  See also
wenzelm@25177
  1398
src/HOL/ex/Abstract_NAT.thy for an example of deriving polymorphic
wenzelm@19083
  1399
entities from a monomorphic theory.
wenzelm@19083
  1400
wenzelm@19083
  1401
Presently, abbreviations are only available 'in' a target locale, but
wenzelm@19363
  1402
not inherited by general import expressions.  Also note that
wenzelm@19363
  1403
'abbreviation' may be used as a type-safe replacement for 'syntax' +
wenzelm@24735
  1404
'translations' in common applications.  The "no_abbrevs" print mode
wenzelm@24735
  1405
prevents folding of abbreviations in term output.
wenzelm@19084
  1406
wenzelm@19682
  1407
Concrete syntax is attached to specified constants in internal form,
wenzelm@19682
  1408
independently of name spaces.  The parse tree representation is
wenzelm@21209
  1409
slightly different -- use 'notation' instead of raw 'syntax', and
wenzelm@19682
  1410
'translations' with explicit "CONST" markup to accommodate this.
wenzelm@19665
  1411
wenzelm@24800
  1412
* Pure/Isar: unified syntax for new-style specification mechanisms
wenzelm@24800
  1413
(e.g.  'definition', 'abbreviation', or 'inductive' in HOL) admits
wenzelm@24800
  1414
full type inference and dummy patterns ("_").  For example:
wenzelm@24735
  1415
wenzelm@24735
  1416
  definition "K x _ = x"
wenzelm@24735
  1417
wenzelm@24738
  1418
  inductive conj for A B
wenzelm@24738
  1419
  where "A ==> B ==> conj A B"
wenzelm@24738
  1420
wenzelm@21735
  1421
* Pure: command 'print_abbrevs' prints all constant abbreviations of
wenzelm@21735
  1422
the current context.  Print mode "no_abbrevs" prevents inversion of
wenzelm@21735
  1423
abbreviations on output.
wenzelm@21735
  1424
wenzelm@24800
  1425
* Isar/locales: improved parameter handling: use of locales "var" and
wenzelm@24800
  1426
"struct" no longer necessary; - parameter renamings are no longer
wenzelm@24800
  1427
required to be injective.  For example, this allows to define
wenzelm@24800
  1428
endomorphisms as locale endom = homom mult mult h.
ballarin@19783
  1429
ballarin@19931
  1430
* Isar/locales: changed the way locales with predicates are defined.
ballarin@19931
  1431
Instead of accumulating the specification, the imported expression is
wenzelm@22126
  1432
now an interpretation.  INCOMPATIBILITY: different normal form of
wenzelm@22126
  1433
locale expressions.  In particular, in interpretations of locales with
wenzelm@22126
  1434
predicates, goals repesenting already interpreted fragments are not
wenzelm@22126
  1435
removed automatically.  Use methods `intro_locales' and
wenzelm@22126
  1436
`unfold_locales'; see below.
wenzelm@22126
  1437
wenzelm@22126
  1438
* Isar/locales: new methods `intro_locales' and `unfold_locales'
wenzelm@22126
  1439
provide backward reasoning on locales predicates.  The methods are
wenzelm@22126
  1440
aware of interpretations and discharge corresponding goals.
wenzelm@22126
  1441
`intro_locales' is less aggressive then `unfold_locales' and does not
wenzelm@22126
  1442
unfold predicates to assumptions.
ballarin@19931
  1443
ballarin@19931
  1444
* Isar/locales: the order in which locale fragments are accumulated
wenzelm@22126
  1445
has changed.  This enables to override declarations from fragments due
wenzelm@22126
  1446
to interpretations -- for example, unwanted simp rules.
ballarin@19931
  1447
ballarin@23920
  1448
* Isar/locales: interpretation in theories and proof contexts has been
ballarin@23920
  1449
extended.  One may now specify (and prove) equations, which are
ballarin@23920
  1450
unfolded in interpreted theorems.  This is useful for replacing
ballarin@23920
  1451
defined concepts (constants depending on locale parameters) by
ballarin@23920
  1452
concepts already existing in the target context.  Example:
ballarin@23920
  1453
ballarin@23920
  1454
  interpretation partial_order ["op <= :: [int, int] => bool"]
ballarin@23920
  1455
    where "partial_order.less (op <=) (x::int) y = (x < y)"
ballarin@23920
  1456
wenzelm@24800
  1457
Typically, the constant `partial_order.less' is created by a
wenzelm@24800
  1458
definition specification element in the context of locale
wenzelm@24800
  1459
partial_order.
wenzelm@24800
  1460
wenzelm@24859
  1461
* Method "induct": improved internal context management to support
wenzelm@24800
  1462
local fixes and defines on-the-fly. Thus explicit meta-level
wenzelm@24800
  1463
connectives !!  and ==> are rarely required anymore in inductive goals
wenzelm@24800
  1464
(using object-logic connectives for this purpose has been long
wenzelm@24800
  1465
obsolete anyway). Common proof patterns are explained in
wenzelm@25177
  1466
src/HOL/Induct/Common_Patterns.thy, see also
wenzelm@25177
  1467
src/HOL/Isar_examples/Puzzle.thy and src/HOL/Lambda for realistic
wenzelm@25177
  1468
examples.
wenzelm@24606
  1469
wenzelm@24859
  1470
* Method "induct": improved handling of simultaneous goals. Instead of
wenzelm@24606
  1471
introducing object-level conjunction, the statement is now split into
wenzelm@24606
  1472
several conclusions, while the corresponding symbolic cases are nested
wenzelm@24606
  1473
accordingly. INCOMPATIBILITY, proofs need to be structured explicitly,
wenzelm@25177
  1474
see src/HOL/Induct/Common_Patterns.thy, for example.
wenzelm@24606
  1475
wenzelm@24859
  1476
* Method "induct": mutual induction rules are now specified as a list
wenzelm@24800
  1477
of rule sharing the same induction cases. HOL packages usually provide
wenzelm@24606
  1478
foo_bar.inducts for mutually defined items foo and bar (e.g. inductive
wenzelm@24859
  1479
predicates/sets or datatypes). INCOMPATIBILITY, users need to specify
wenzelm@24859
  1480
mutual induction rules differently, i.e. like this:
wenzelm@18506
  1481
wenzelm@18506
  1482
  (induct rule: foo_bar.inducts)
wenzelm@18506
  1483
  (induct set: foo bar)
wenzelm@24859
  1484
  (induct pred: foo bar)
wenzelm@18506
  1485
  (induct type: foo bar)
wenzelm@18506
  1486
wenzelm@18506
  1487
The ML function ProjectRule.projections turns old-style rules into the
wenzelm@18506
  1488
new format.
wenzelm@18506
  1489
wenzelm@24859
  1490
* Method "coinduct": dual of induction, see
wenzelm@18399
  1491
src/HOL/Library/Coinductive_List.thy for various examples.
wenzelm@18399
  1492
wenzelm@24859
  1493
* Method "cases", "induct", "coinduct": the ``(open)'' option is
wenzelm@24859
  1494
considered a legacy feature.
wenzelm@24859
  1495
wenzelm@20919
  1496
* Attribute "symmetric" produces result with standardized schematic
wenzelm@20919
  1497
variables (index 0).  Potential INCOMPATIBILITY.
wenzelm@20919
  1498
wenzelm@22126
  1499
* Simplifier: by default the simplifier trace only shows top level
wenzelm@22126
  1500
rewrites now. That is, trace_simp_depth_limit is set to 1 by
wenzelm@22126
  1501
default. Thus there is less danger of being flooded by the trace. The
wenzelm@22126
  1502
trace indicates where parts have been suppressed.
nipkow@18674
  1503
  
wenzelm@18536
  1504
* Provers/classical: removed obsolete classical version of elim_format
wenzelm@18536
  1505
attribute; classical elim/dest rules are now treated uniformly when
wenzelm@18536
  1506
manipulating the claset.
wenzelm@18536
  1507
wenzelm@18694
  1508
* Provers/classical: stricter checks to ensure that supplied intro,
wenzelm@18694
  1509
dest and elim rules are well-formed; dest and elim rules must have at
wenzelm@18694
  1510
least one premise.
wenzelm@18694
  1511
wenzelm@18694
  1512
* Provers/classical: attributes dest/elim/intro take an optional
wenzelm@18695
  1513
weight argument for the rule (just as the Pure versions).  Weights are
wenzelm@18696
  1514
ignored by automated tools, but determine the search order of single
wenzelm@18694
  1515
rule steps.
paulson@18557
  1516
wenzelm@18536
  1517
* Syntax: input syntax now supports dummy variable binding "%_. b",
wenzelm@18536
  1518
where the body does not mention the bound variable.  Note that dummy
wenzelm@18536
  1519
patterns implicitly depend on their context of bounds, which makes
wenzelm@18536
  1520
"{_. _}" match any set comprehension as expected.  Potential
wenzelm@18536
  1521
INCOMPATIBILITY -- parse translations need to cope with syntactic
wenzelm@18536
  1522
constant "_idtdummy" in the binding position.
wenzelm@18536
  1523
wenzelm@18536
  1524
* Syntax: removed obsolete syntactic constant "_K" and its associated
wenzelm@18536
  1525
parse translation.  INCOMPATIBILITY -- use dummy abstraction instead,
wenzelm@18536
  1526
for example "A -> B" => "Pi A (%_. B)".
wenzelm@17779
  1527
wenzelm@20582
  1528
* Pure: 'class_deps' command visualizes the subclass relation, using
wenzelm@20582
  1529
the graph browser tool.
wenzelm@20582
  1530
wenzelm@24800
  1531
* Pure: 'print_theory' now suppresses certain internal declarations by
wenzelm@24800
  1532
default; use '!' option for full details.
wenzelm@20620
  1533
wenzelm@17865
  1534
nipkow@17806
  1535
*** HOL ***
nipkow@17806
  1536
wenzelm@25129
  1537
* Method "metis" proves goals by applying the Metis general-purpose
wenzelm@25129
  1538
resolution prover (see also http://gilith.com/software/metis/).
wenzelm@25129
  1539
Examples are in the directory MetisExamples.  WARNING: the
wenzelm@25129
  1540
Isabelle/HOL-Metis integration does not yet work properly with
wenzelm@25129
  1541
multi-threading.
wenzelm@25129
  1542
  
wenzelm@25129
  1543
* Command 'sledgehammer' invokes external automatic theorem provers as
wenzelm@25129
  1544
background processes.  It generates calls to the "metis" method if
wenzelm@25129
  1545
successful. These can be pasted into the proof.  Users do not have to
wenzelm@25129
  1546
wait for the automatic provers to return.  WARNING: does not really
wenzelm@25129
  1547
work with multi-threading.
wenzelm@25129
  1548
wenzelm@24804
  1549
* New "auto_quickcheck" feature tests outermost goal statements for
wenzelm@24804
  1550
potential counter-examples.  Controlled by ML references
wenzelm@24804
  1551
auto_quickcheck (default true) and auto_quickcheck_time_limit (default
wenzelm@25129
  1552
5000 milliseconds).  Fails silently if statements is outside of
wenzelm@25129
  1553
executable fragment, or any other codgenerator problem occurs.
wenzelm@24804
  1554
haftmann@25184
  1555
* New constant "undefined" with axiom "undefined x = undefined".
haftmann@25184
  1556
haftmann@25184
  1557
* Added class "HOL.eq", allowing for code generation with polymorphic
haftmann@25184
  1558
equality.
haftmann@25184
  1559
haftmann@25184
  1560
* Some renaming of class constants due to canonical name prefixing in
haftmann@25184
  1561
the new 'class' package:
haftmann@25184
  1562
haftmann@25184
  1563
    HOL.abs ~> HOL.abs_class.abs
haftmann@25184
  1564
    HOL.divide ~> HOL.divide_class.divide
haftmann@25184
  1565
    0 ~> HOL.zero_class.zero
haftmann@25184
  1566
    1 ~> HOL.one_class.one
haftmann@25184
  1567
    op + ~> HOL.plus_class.plus
haftmann@25184
  1568
    op - ~> HOL.minus_class.minus
haftmann@25184
  1569
    uminus ~> HOL.minus_class.uminus
haftmann@25184
  1570
    op * ~> HOL.times_class.times
haftmann@25184
  1571
    op < ~> HOL.ord_class.less
haftmann@25184
  1572
    op <= > HOL.ord_class.less_eq
haftmann@25184
  1573
    Nat.power ~> Power.power_class.power
haftmann@25184
  1574
    Nat.size ~> Nat.size_class.size
haftmann@25184
  1575
    Numeral.number_of ~> Numeral.number_class.number_of
haftmann@25184
  1576
    FixedPoint.Inf ~> Lattices.complete_lattice_class.Inf
haftmann@25184
  1577
    FixedPoint.Sup ~> Lattices.complete_lattice_class.Sup
haftmann@25184
  1578
    Orderings.min ~> Orderings.ord_class.min
haftmann@25184
  1579
    Orderings.max ~> Orderings.ord_class.max
haftmann@25184
  1580
    Divides.op div ~> Divides.div_class.div
haftmann@25184
  1581
    Divides.op mod ~> Divides.div_class.mod
haftmann@25184
  1582
    Divides.op dvd ~> Divides.div_class.dvd
haftmann@25184
  1583
haftmann@25184
  1584
INCOMPATIBILITY.  Adaptions may be required in the following cases:
haftmann@25184
  1585
haftmann@25184
  1586
a) User-defined constants using any of the names "plus", "minus",
haftmann@25184
  1587
"times", "less" or "less_eq". The standard syntax translations for
haftmann@25184
  1588
"+", "-" and "*" may go wrong.  INCOMPATIBILITY: use more specific
haftmann@25184
  1589
names.
haftmann@25184
  1590
haftmann@25184
  1591
b) Variables named "plus", "minus", "times", "less", "less_eq"
haftmann@25184
  1592
INCOMPATIBILITY: use more specific names.
haftmann@25184
  1593
haftmann@25184
  1594
c) Permutative equations (e.g. "a + b = b + a")
haftmann@25184
  1595
Since the change of names also changes the order of terms, permutative
haftmann@25184
  1596
rewrite rules may get applied in a different order. Experience shows
haftmann@25184
  1597
that this is rarely the case (only two adaptions in the whole Isabelle
haftmann@25184
  1598
distribution).  INCOMPATIBILITY: rewrite proofs
haftmann@25184
  1599
haftmann@25184
  1600
d) ML code directly refering to constant names
haftmann@25184
  1601
This in general only affects hand-written proof tactics, simprocs and
haftmann@25184
  1602
so on.  INCOMPATIBILITY: grep your sourcecode and replace names.
haftmann@25184
  1603
Consider using @{const_name} antiquotation.
haftmann@25184
  1604
haftmann@25184
  1605
* New class "default" with associated constant "default".
haftmann@25184
  1606
haftmann@25184
  1607
* Function "sgn" is now overloaded and available on int, real, complex
haftmann@25184
  1608
(and other numeric types), using class "sgn".  Two possible defs of
haftmann@25184
  1609
sgn are given as equational assumptions in the classes sgn_if and
haftmann@25184
  1610
sgn_div_norm; ordered_idom now also inherits from sgn_if.
haftmann@25184
  1611
INCOMPATIBILITY.
haftmann@25184
  1612
haftmann@25184
  1613
* Locale "partial_order" now unified with class "order" (cf. theory
haftmann@25184
  1614
Orderings), added parameter "less".  INCOMPATIBILITY.
haftmann@25184
  1615
haftmann@25184
  1616
* Renamings in classes "order" and "linorder": facts "refl", "trans" and
haftmann@25184
  1617
"cases" to "order_refl", "order_trans" and "linorder_cases", to avoid
haftmann@25184
  1618
clashes with HOL "refl" and "trans".  INCOMPATIBILITY.
haftmann@25184
  1619
haftmann@25184
  1620
* Classes "order" and "linorder": potential INCOMPATIBILITY due to
haftmann@25184
  1621
changed order of proof goals in instance proofs.
haftmann@25184
  1622
haftmann@25184
  1623
* The transitivity reasoner for partial and linear orders is set up
haftmann@25184
  1624
for classes "order" and "linorder".  Instances of the reasoner are available
haftmann@25184
  1625
in all contexts importing or interpreting the corresponding locales.
haftmann@25184
  1626
Method "order" invokes the reasoner separately; the reasoner
haftmann@25184
  1627
is also integrated with the Simplifier as a solver.  Diagnostic
haftmann@25184
  1628
command 'print_orders' shows the available instances of the reasoner
haftmann@25184
  1629
in the current context.
haftmann@25184
  1630
haftmann@25184
  1631
* Localized monotonicity predicate in theory "Orderings"; integrated
haftmann@25184
  1632
lemmas max_of_mono and min_of_mono with this predicate.
haftmann@25184
  1633
INCOMPATIBILITY.
haftmann@25184
  1634
haftmann@25184
  1635
* Formulation of theorem "dense" changed slightly due to integration
haftmann@25184
  1636
with new class dense_linear_order.
haftmann@25184
  1637
haftmann@25184
  1638
* Uniform lattice theory development in HOL.
haftmann@25184
  1639
haftmann@25184
  1640
    constants "meet" and "join" now named "inf" and "sup"
haftmann@25184
  1641
    constant "Meet" now named "Inf"
haftmann@25184
  1642
haftmann@25184
  1643
    classes "meet_semilorder" and "join_semilorder" now named
haftmann@25184
  1644
      "lower_semilattice" and "upper_semilattice"
haftmann@25184
  1645
    class "lorder" now named "lattice"
haftmann@25184
  1646
    class "comp_lat" now named "complete_lattice"
haftmann@25184
  1647
haftmann@25184
  1648
    Instantiation of lattice classes allows explicit definitions
haftmann@25184
  1649
    for "inf" and "sup" operations (or "Inf" and "Sup" for complete lattices).
haftmann@25184
  1650
haftmann@25184
  1651
  INCOMPATIBILITY.  Theorem renames:
haftmann@25184
  1652
haftmann@25184
  1653
    meet_left_le            ~> inf_le1
haftmann@25184
  1654
    meet_right_le           ~> inf_le2
haftmann@25184
  1655
    join_left_le            ~> sup_ge1
haftmann@25184
  1656
    join_right_le           ~> sup_ge2
haftmann@25184
  1657
    meet_join_le            ~> inf_sup_ord
haftmann@25184
  1658
    le_meetI                ~> le_infI
haftmann@25184
  1659
    join_leI                ~> le_supI
haftmann@25184
  1660
    le_meet                 ~> le_inf_iff
haftmann@25184
  1661
    le_join                 ~> ge_sup_conv
haftmann@25184
  1662
    meet_idempotent         ~> inf_idem
haftmann@25184
  1663
    join_idempotent         ~> sup_idem
haftmann@25184
  1664
    meet_comm               ~> inf_commute
haftmann@25184
  1665
    join_comm               ~> sup_commute
haftmann@25184
  1666
    meet_leI1               ~> le_infI1
haftmann@25184
  1667
    meet_leI2               ~> le_infI2
haftmann@25184
  1668
    le_joinI1               ~> le_supI1
haftmann@25184
  1669
    le_joinI2               ~> le_supI2
haftmann@25184
  1670
    meet_assoc              ~> inf_assoc
haftmann@25184
  1671
    join_assoc              ~> sup_assoc
haftmann@25184
  1672
    meet_left_comm          ~> inf_left_commute
haftmann@25184
  1673
    meet_left_idempotent    ~> inf_left_idem
haftmann@25184
  1674
    join_left_comm          ~> sup_left_commute
haftmann@25184
  1675
    join_left_idempotent    ~> sup_left_idem
haftmann@25184
  1676
    meet_aci                ~> inf_aci
haftmann@25184
  1677
    join_aci                ~> sup_aci
haftmann@25184
  1678
    le_def_meet             ~> le_iff_inf
haftmann@25184
  1679
    le_def_join             ~> le_iff_sup
haftmann@25184
  1680
    join_absorp2            ~> sup_absorb2
haftmann@25184
  1681
    join_absorp1            ~> sup_absorb1
haftmann@25184
  1682
    meet_absorp1            ~> inf_absorb1
haftmann@25184
  1683
    meet_absorp2            ~> inf_absorb2
haftmann@25184
  1684
    meet_join_absorp        ~> inf_sup_absorb
haftmann@25184
  1685
    join_meet_absorp        ~> sup_inf_absorb
haftmann@25184
  1686
    distrib_join_le         ~> distrib_sup_le
haftmann@25184
  1687
    distrib_meet_le         ~> distrib_inf_le
haftmann@25184
  1688
haftmann@25184
  1689
    add_meet_distrib_left   ~> add_inf_distrib_left
haftmann@25184
  1690
    add_join_distrib_left   ~> add_sup_distrib_left
haftmann@25184
  1691
    is_join_neg_meet        ~> is_join_neg_inf
haftmann@25184
  1692
    is_meet_neg_join        ~> is_meet_neg_sup
haftmann@25184
  1693
    add_meet_distrib_right  ~> add_inf_distrib_right
haftmann@25184
  1694
    add_join_distrib_right  ~> add_sup_distrib_right
haftmann@25184
  1695
    add_meet_join_distribs  ~> add_sup_inf_distribs
haftmann@25184
  1696
    join_eq_neg_meet        ~> sup_eq_neg_inf
haftmann@25184
  1697
    meet_eq_neg_join        ~> inf_eq_neg_sup
haftmann@25184
  1698
    add_eq_meet_join        ~> add_eq_inf_sup
haftmann@25184
  1699
    meet_0_imp_0            ~> inf_0_imp_0
haftmann@25184
  1700
    join_0_imp_0            ~> sup_0_imp_0
haftmann@25184
  1701
    meet_0_eq_0             ~> inf_0_eq_0
haftmann@25184
  1702
    join_0_eq_0             ~> sup_0_eq_0
haftmann@25184
  1703
    neg_meet_eq_join        ~> neg_inf_eq_sup
haftmann@25184
  1704
    neg_join_eq_meet        ~> neg_sup_eq_inf
haftmann@25184
  1705
    join_eq_if              ~> sup_eq_if
haftmann@25184
  1706
haftmann@25184
  1707
    mono_meet               ~> mono_inf
haftmann@25184
  1708
    mono_join               ~> mono_sup
haftmann@25184
  1709
    meet_bool_eq            ~> inf_bool_eq
haftmann@25184
  1710
    join_bool_eq            ~> sup_bool_eq
haftmann@25184
  1711
    meet_fun_eq             ~> inf_fun_eq
haftmann@25184
  1712
    join_fun_eq             ~> sup_fun_eq
haftmann@25184
  1713
    meet_set_eq             ~> inf_set_eq
haftmann@25184
  1714
    join_set_eq             ~> sup_set_eq
haftmann@25184
  1715
    meet1_iff               ~> inf1_iff
haftmann@25184
  1716
    meet2_iff               ~> inf2_iff
haftmann@25184
  1717
    meet1I                  ~> inf1I
haftmann@25184
  1718
    meet2I                  ~> inf2I
haftmann@25184
  1719
    meet1D1                 ~> inf1D1
haftmann@25184
  1720
    meet2D1                 ~> inf2D1
haftmann@25184
  1721
    meet1D2                 ~> inf1D2
haftmann@25184
  1722
    meet2D2                 ~> inf2D2
haftmann@25184
  1723
    meet1E                  ~> inf1E
haftmann@25184
  1724
    meet2E                  ~> inf2E
haftmann@25184
  1725
    join1_iff               ~> sup1_iff
haftmann@25184
  1726
    join2_iff               ~> sup2_iff
haftmann@25184
  1727
    join1I1                 ~> sup1I1
haftmann@25184
  1728
    join2I1                 ~> sup2I1
haftmann@25184
  1729
    join1I1                 ~> sup1I1
haftmann@25184
  1730
    join2I2                 ~> sup1I2
haftmann@25184
  1731
    join1CI                 ~> sup1CI
haftmann@25184
  1732
    join2CI                 ~> sup2CI
haftmann@25184
  1733
    join1E                  ~> sup1E
haftmann@25184
  1734
    join2E                  ~> sup2E
haftmann@25184
  1735
haftmann@25184
  1736
    is_meet_Meet            ~> is_meet_Inf
haftmann@25184
  1737
    Meet_bool_def           ~> Inf_bool_def
haftmann@25184
  1738
    Meet_fun_def            ~> Inf_fun_def
haftmann@25184
  1739
    Meet_greatest           ~> Inf_greatest
haftmann@25184
  1740
    Meet_lower              ~> Inf_lower
haftmann@25184
  1741
    Meet_set_def            ~> Inf_set_def
haftmann@25184
  1742
haftmann@25184
  1743
    Sup_def                 ~> Sup_Inf
haftmann@25184
  1744
    Sup_bool_eq             ~> Sup_bool_def
haftmann@25184
  1745
    Sup_fun_eq              ~> Sup_fun_def
haftmann@25184
  1746
    Sup_set_eq              ~> Sup_set_def
haftmann@25184
  1747
haftmann@25184
  1748
    listsp_meetI            ~> listsp_infI
haftmann@25184
  1749
    listsp_meet_eq          ~> listsp_inf_eq
haftmann@25184
  1750
haftmann@25184
  1751
    meet_min                ~> inf_min
haftmann@25184
  1752
    join_max                ~> sup_max
haftmann@25184
  1753
haftmann@25184
  1754
* Added syntactic class "size"; overloaded constant "size" now has
haftmann@25184
  1755
type "'a::size ==> bool"
haftmann@25184
  1756
wenzelm@24800
  1757
* Internal reorganisation of `size' of datatypes: size theorems
wenzelm@24800
  1758
"foo.size" are no longer subsumed by "foo.simps" (but are still
wenzelm@24800
  1759
simplification rules by default!); theorems "prod.size" now named
haftmann@25184
  1760
"*.size".
haftmann@25184
  1761
haftmann@25184
  1762
* Class "div" now inherits from class "times" rather than "type".
haftmann@25184
  1763
INCOMPATIBILITY.
wenzelm@24800
  1764
wenzelm@24800
  1765
* HOL/Finite_Set: "name-space" locales Lattice, Distrib_lattice,
wenzelm@24800
  1766
Linorder etc.  have disappeared; operations defined in terms of
wenzelm@24800
  1767
fold_set now are named Inf_fin, Sup_fin.  INCOMPATIBILITY.
wenzelm@24800
  1768
wenzelm@25129
  1769
* HOL/Nat: neq0_conv no longer declared as iff.  INCOMPATIBILITY.
wenzelm@25129
  1770
wenzelm@24800
  1771
* HOL-Word: New extensive library and type for generic, fixed size
wenzelm@24800
  1772
machine words, with arithemtic, bit-wise, shifting and rotating
wenzelm@24800
  1773
operations, reflection into int, nat, and bool lists, automation for
wenzelm@24800
  1774
linear arithmetic (by automatic reflection into nat or int), including
wenzelm@24800
  1775
lemmas on overflow and monotonicity.  Instantiated to all appropriate
wenzelm@24800
  1776
arithmetic type classes, supporting automatic simplification of
wenzelm@24800
  1777
numerals on all operations.
kleing@24333
  1778
kleing@24333
  1779
* Library/Boolean_Algebra: locales for abstract boolean algebras.
kleing@24333
  1780
kleing@24333
  1781
* Library/Numeral_Type: numbers as types, e.g. TYPE(32).
kleing@24333
  1782
haftmann@23850
  1783
* Code generator library theories:
haftmann@24993
  1784
  - Code_Integer represents HOL integers by big integer literals in target
haftmann@23850
  1785
    languages.
haftmann@24993
  1786
  - Code_Char represents HOL characters by character literals in target
haftmann@23850
  1787
    languages.
haftmann@24993
  1788
  - Code_Char_chr like Code_Char, but also offers treatment of character
haftmann@24993
  1789
    codes; includes Code_Integer.
wenzelm@24800
  1790
  - Executable_Set allows to generate code for finite sets using lists.
wenzelm@24800
  1791
  - Executable_Rat implements rational numbers as triples (sign, enumerator,
haftmann@23850
  1792
    denominator).
wenzelm@24800
  1793
  - Executable_Real implements a subset of real numbers, namly those
haftmann@23850
  1794
    representable by rational numbers.
wenzelm@24800
  1795
  - Efficient_Nat implements natural numbers by integers, which in general will
haftmann@23850
  1796
    result in higher efficency; pattern matching with 0/Suc is eliminated;
haftmann@24993
  1797
    includes Code_Integer.
haftmann@24993
  1798
  - Code_Index provides an additional datatype index which is mapped to
haftmann@24993
  1799
    target-language built-in integers.
haftmann@26355
  1800
  - Code_Message provides an additional datatype message_string which is isomorphic to
haftmann@24993
  1801
    strings; messages are mapped to target-language strings.
haftmann@23850
  1802
berghofe@23783
  1803
* New package for inductive predicates
berghofe@23783
  1804
berghofe@23783
  1805
  An n-ary predicate p with m parameters z_1, ..., z_m can now be defined via
berghofe@23783
  1806
berghofe@23783
  1807
    inductive
berghofe@23783
  1808
      p :: "U_1 => ... => U_m => T_1 => ... => T_n => bool"
berghofe@23783
  1809
      for z_1 :: U_1 and ... and z_n :: U_m
berghofe@23783
  1810
    where
berghofe@23783
  1811
      rule_1: "... ==> p z_1 ... z_m t_1_1 ... t_1_n"
berghofe@23783
  1812
    | ...
berghofe@23783
  1813
wenzelm@24800
  1814
  with full support for type-inference, rather than
berghofe@23783
  1815
berghofe@23783
  1816
    consts s :: "U_1 => ... => U_m => (T_1 * ... * T_n) set"
berghofe@23783
  1817
berghofe@23783
  1818
    abbreviation p :: "U_1 => ... => U_m => T_1 => ... => T_n => bool"
berghofe@23783
  1819
    where "p z_1 ... z_m x_1 ... x_n == (x_1, ..., x_n) : s z_1 ... z_m"
berghofe@23783
  1820
berghofe@23783
  1821
    inductive "s z_1 ... z_m"
berghofe@23783
  1822
    intros
berghofe@23783
  1823
      rule_1: "... ==> (t_1_1, ..., t_1_n) : s z_1 ... z_m"
berghofe@23783
  1824
      ...
berghofe@23783
  1825
berghofe@23783
  1826
  For backward compatibility, there is a wrapper allowing inductive
berghofe@23783
  1827
  sets to be defined with the new package via
berghofe@23783
  1828
berghofe@23783
  1829
    inductive_set
berghofe@23783
  1830
      s :: "U_1 => ... => U_m => (T_1 * ... * T_n) set"
berghofe@23783
  1831
      for z_1 :: U_1 and ... and z_n :: U_m
berghofe@23783
  1832
    where
berghofe@23783
  1833
      rule_1: "... ==> (t_1_1, ..., t_1_n) : s z_1 ... z_m"
berghofe@23783
  1834
    | ...
berghofe@23783
  1835
berghofe@23783
  1836
  or
berghofe@23783
  1837
berghofe@23783
  1838
    inductive_set
berghofe@23783
  1839
      s :: "U_1 => ... => U_m => (T_1 * ... * T_n) set"
berghofe@23783
  1840
      and p :: "U_1 => ... => U_m => T_1 => ... => T_n => bool"
berghofe@23783
  1841
      for z_1 :: U_1 and ... and z_n :: U_m
berghofe@23783
  1842
    where
berghofe@23783
  1843
      "p z_1 ... z_m x_1 ... x_n == (x_1, ..., x_n) : s z_1 ... z_m"
berghofe@23783
  1844
    | rule_1: "... ==> p z_1 ... z_m t_1_1 ... t_1_n"
berghofe@23783
  1845
    | ...
berghofe@23783
  1846
berghofe@23783
  1847
  if the additional syntax "p ..." is required.
berghofe@23783
  1848
wenzelm@25177
  1849
  Numerous examples can be found in the subdirectories src/HOL/Auth,
wenzelm@25177
  1850
  src/HOL/Bali, src/HOL/Induct, and src/HOL/MicroJava.
berghofe@23783
  1851
berghofe@23783
  1852
  INCOMPATIBILITIES:
berghofe@23783
  1853
berghofe@23783
  1854
  - Since declaration and definition of inductive sets or predicates
wenzelm@24800
  1855
    is no longer separated, abbreviations involving the newly
wenzelm@24800
  1856
    introduced sets or predicates must be specified together with the
wenzelm@24800
  1857
    introduction rules after the 'where' keyword (see above), rather
wenzelm@24800
  1858
    than before the actual inductive definition.
wenzelm@24800
  1859
wenzelm@24800
  1860
  - The variables in induction and elimination rules are now
wenzelm@24800
  1861
    quantified in the order of their occurrence in the introduction
wenzelm@24800
  1862
    rules, rather than in alphabetical order. Since this may break
wenzelm@24800
  1863
    some proofs, these proofs either have to be repaired, e.g. by
wenzelm@24800
  1864
    reordering the variables a_i_1 ... a_i_{k_i} in Isar 'case'
wenzelm@24800
  1865
    statements of the form
berghofe@23783
  1866
berghofe@23783
  1867
      case (rule_i a_i_1 ... a_i_{k_i})
berghofe@23783
  1868
berghofe@23783
  1869
    or the old order of quantification has to be restored by explicitly adding
berghofe@23783
  1870
    meta-level quantifiers in the introduction rules, i.e.
berghofe@23783
  1871
berghofe@23783
  1872
      | rule_i: "!!a_i_1 ... a_i_{k_i}. ... ==> p z_1 ... z_m t_i_1 ... t_i_n"
berghofe@23783
  1873
berghofe@23783
  1874
  - The format of the elimination rules is now
berghofe@23783
  1875
berghofe@23783
  1876
      p z_1 ... z_m x_1 ... x_n ==>
berghofe@23783
  1877
        (!!a_1_1 ... a_1_{k_1}. x_1 = t_1_1 ==> ... ==> x_n = t_1_n ==> ... ==> P)
berghofe@23783
  1878
        ==> ... ==> P
berghofe@23783
  1879
berghofe@23783
  1880
    for predicates and
berghofe@23783
  1881
berghofe@23783
  1882
      (x_1, ..., x_n) : s z_1 ... z_m ==>
berghofe@23783
  1883
        (!!a_1_1 ... a_1_{k_1}. x_1 = t_1_1 ==> ... ==> x_n = t_1_n ==> ... ==> P)
berghofe@23783
  1884
        ==> ... ==> P
berghofe@23783
  1885
berghofe@23783
  1886
    for sets rather than
berghofe@23783
  1887
berghofe@23783
  1888
      x : s z_1 ... z_m ==>
berghofe@23783
  1889
        (!!a_1_1 ... a_1_{k_1}. x = (t_1_1, ..., t_1_n) ==> ... ==> P)
berghofe@23783
  1890
        ==> ... ==> P
berghofe@23783
  1891
wenzelm@24800
  1892
    This may require terms in goals to be expanded to n-tuples
wenzelm@24800
  1893
    (e.g. using case_tac or simplification with the split_paired_all
wenzelm@24800
  1894
    rule) before the above elimination rule is applicable.
wenzelm@24800
  1895
wenzelm@24800
  1896
  - The elimination or case analysis rules for (mutually) inductive
wenzelm@24800
  1897
    sets or predicates are now called "p_1.cases" ... "p_k.cases". The
wenzelm@24800
  1898
    list of rules "p_1_..._p_k.elims" is no longer available.
berghofe@23783
  1899
krauss@25198
  1900
* New package "function"/"fun" for general recursive functions,
krauss@25198
  1901
supporting mutual and nested recursion, definitions in local contexts,
krauss@25198
  1902
more general pattern matching and partiality. See HOL/ex/Fundefs.thy
krauss@25198
  1903
for small examples, and the separate tutorial on the function
krauss@25198
  1904
package. The old recdef "package" is still available as before, but
krauss@25198
  1905
users are encouraged to use the new package.
krauss@25198
  1906
krauss@25198
  1907
* Method "lexicographic_order" automatically synthesizes termination
krauss@25198
  1908
relations as lexicographic combinations of size measures. 
krauss@25198
  1909
wenzelm@24800
  1910
* Case-expressions allow arbitrary constructor-patterns (including
wenzelm@24800
  1911
"_") and take their order into account, like in functional
wenzelm@24800
  1912
programming.  Internally, this is translated into nested
wenzelm@24800
  1913
case-expressions; missing cases are added and mapped to the predefined
wenzelm@24800
  1914
constant "undefined". In complicated cases printing may no longer show
wenzelm@24800
  1915
the original input but the internal form. Lambda-abstractions allow
wenzelm@24800
  1916
the same form of pattern matching: "% pat1 => e1 | ..." is an
wenzelm@24800
  1917
abbreviation for "%x. case x of pat1 => e1 | ..." where x is a new
wenzelm@24800
  1918
variable.
nipkow@23564
  1919
huffman@23468
  1920
* IntDef: The constant "int :: nat => int" has been removed; now "int"
wenzelm@24800
  1921
is an abbreviation for "of_nat :: nat => int". The simplification
wenzelm@24800
  1922
rules for "of_nat" have been changed to work like "int" did
wenzelm@24800
  1923
previously.  Potential INCOMPATIBILITY:
huffman@23468
  1924
  - "of_nat (Suc m)" simplifies to "1 + of_nat m" instead of "of_nat m + 1"
huffman@23468
  1925
  - of_nat_diff and of_nat_mult are no longer default simp rules
huffman@23377
  1926
chaieb@23295
  1927
* Method "algebra" solves polynomial equations over (semi)rings using
wenzelm@24800
  1928
Groebner bases. The (semi)ring structure is defined by locales and the
wenzelm@24800
  1929
tool setup depends on that generic context. Installing the method for
wenzelm@24800
  1930
a specific type involves instantiating the locale and possibly adding
wenzelm@24800
  1931
declarations for computation on the coefficients.  The method is
wenzelm@24800
  1932
already instantiated for natural numbers and for the axiomatic class
wenzelm@24800
  1933
of idoms with numerals.  See also the paper by Chaieb and Wenzel at
wenzelm@24800
  1934
CALCULEMUS 2007 for the general principles underlying this
wenzelm@24800
  1935
architecture of context-aware proof-tools.
wenzelm@24800
  1936
wenzelm@25033
  1937
* Method "ferrack" implements quantifier elimination over
wenzelm@25033
  1938
special-purpose dense linear orders using locales (analogous to
wenzelm@25033
  1939
"algebra"). The method is already installed for class
wenzelm@25033
  1940
{ordered_field,recpower,number_ring} which subsumes real, hyperreal,
wenzelm@25033
  1941
rat, etc.
wenzelm@25033
  1942
wenzelm@24800
  1943
* Former constant "List.op @" now named "List.append".  Use ML
wenzelm@24800
  1944
antiquotations @{const_name List.append} or @{term " ... @ ... "} to
wenzelm@24800
  1945
circumvent possible incompatibilities when working on ML level.
wenzelm@24800
  1946
haftmann@24996
  1947
* primrec: missing cases mapped to "undefined" instead of "arbitrary".
haftmann@22845
  1948
wenzelm@24800
  1949
* New function listsum :: 'a list => 'a for arbitrary monoids.
wenzelm@24800
  1950
Special syntax: "SUM x <- xs. f x" (and latex variants)
wenzelm@24800
  1951
wenzelm@24800
  1952
* New syntax for Haskell-like list comprehension (input only), eg.
wenzelm@25177
  1953
[(x,y). x <- xs, y <- ys, x ~= y], see also src/HOL/List.thy.
wenzelm@24800
  1954
wenzelm@24800
  1955
* The special syntax for function "filter" has changed from [x :
wenzelm@24800
  1956
xs. P] to [x <- xs. P] to avoid an ambiguity caused by list
wenzelm@24800
  1957
comprehension syntax, and for uniformity.  INCOMPATIBILITY.
wenzelm@24800
  1958
wenzelm@24800
  1959
* [a..b] is now defined for arbitrary linear orders.  It used to be
wenzelm@24800
  1960
defined on nat only, as an abbreviation for [a..<Suc b]
wenzelm@24800
  1961
INCOMPATIBILITY.
wenzelm@24800
  1962
wenzelm@24800
  1963
* Renamed lemma "set_take_whileD"  to "set_takeWhileD".
wenzelm@24800
  1964
wenzelm@25177
  1965
* New functions "sorted" and "sort" in src/HOL/List.thy.
wenzelm@24800
  1966
wenzelm@24800
  1967
* New lemma collection field_simps (an extension of ring_simps) for
wenzelm@24800
  1968
manipulating (in)equations involving division. Multiplies with all
wenzelm@24800
  1969
denominators that can be proved to be non-zero (in equations) or
wenzelm@24800
  1970
positive/negative (in inequations).
nipkow@23480
  1971
nipkow@23480
  1972
* Lemma collections ring_eq_simps, group_eq_simps and ring_distrib
wenzelm@24800
  1973
have been improved and renamed to ring_simps, group_simps and
wenzelm@24800
  1974
ring_distribs.  Removed lemmas field_xyz in theory Ring_and_Field
wenzelm@24800
  1975
because they were subsumed by lemmas xyz.  INCOMPATIBILITY.
wenzelm@24800
  1976
wenzelm@25177
  1977
* Theory Library/Commutative_Ring: switched from recdef to function
wenzelm@24800
  1978
package; constants add, mul, pow now curried.  Infix syntax for
wenzelm@24800
  1979
algebraic operations.
haftmann@22735
  1980
wenzelm@24800
  1981
* Dropped redundant lemma def_imp_eq in favor of meta_eq_to_obj_eq.
haftmann@22218
  1982
INCOMPATIBILITY.
haftmann@22218
  1983
wenzelm@24800
  1984
* Dropped redundant lemma if_def2 in favor of if_bool_eq_conj.
haftmann@22218
  1985
INCOMPATIBILITY.
haftmann@22218
  1986
wenzelm@22126
  1987
* HOL/records: generalised field-update to take a function on the
wenzelm@22126
  1988
field rather than the new value: r(|A := x|) is translated to A_update
wenzelm@22126
  1989
(K x) r The K-combinator that is internally used is called K_record.
schirmer@21226
  1990
INCOMPATIBILITY: Usage of the plain update functions has to be
schirmer@21226
  1991
adapted.
schirmer@21226
  1992
 
wenzelm@24800
  1993
* Class "semiring_0" now contains annihilation axioms x * 0 = 0 and 0
wenzelm@24800
  1994
* x = 0, which are required for a semiring.  Richer structures do not
wenzelm@24800
  1995
inherit from semiring_0 anymore, because this property is a theorem
wenzelm@24800
  1996
there, not an axiom.  INCOMPATIBILITY: In instances of semiring_0,
wenzelm@24800
  1997
there is more to prove, but this is mostly trivial.
wenzelm@24800
  1998
wenzelm@24800
  1999
* Class "recpower" is generalized to arbitrary monoids, not just
wenzelm@24800
  2000
commutative semirings.  INCOMPATIBILITY: may need to incorporate
haftmann@25163
  2001
commutativity or semiring properties additionally.
haftmann@21215
  2002
haftmann@21099
  2003
* Constant "List.list_all2" in List.thy now uses authentic syntax.
wenzelm@24800
  2004
INCOMPATIBILITY: translations containing list_all2 may go wrong,
wenzelm@24800
  2005
better use 'abbreviation'.
wenzelm@24800
  2006
wenzelm@24800
  2007
* Renamed constant "List.op mem" to "List.member".  INCOMPATIBILITY.
wenzelm@24800
  2008
wenzelm@22126
  2009
* Numeral syntax: type 'bin' which was a mere type copy of 'int' has
wenzelm@24800
  2010
been abandoned in favour of plain 'int'.  INCOMPATIBILITY --
wenzelm@22126
  2011
significant changes for setting up numeral syntax for types:
wenzelm@24800
  2012
  - New constants Numeral.pred and Numeral.succ instead
haftmann@20485
  2013
      of former Numeral.bin_pred and Numeral.bin_succ.
haftmann@20485
  2014
  - Use integer operations instead of bin_add, bin_mult and so on.
haftmann@20485
  2015
  - Numeral simplification theorems named Numeral.numeral_simps instead of Bin_simps.
haftmann@20485
  2016
  - ML structure Bin_Simprocs now named Int_Numeral_Base_Simprocs.
haftmann@20485
  2017
wenzelm@25177
  2018
See src/HOL/Integ/IntArith.thy for an example setup.
wenzelm@25177
  2019
wenzelm@25177
  2020
* Command 'normal_form' computes the normal form of a term that may
wenzelm@25177
  2021
contain free variables.  For example ``normal_form "rev [a, b, c]"''
wenzelm@25177
  2022
produces ``[b, c, a]'' (without proof).  This command is suitable for
wenzelm@25177
  2023
heavy-duty computations because the functions are compiled to ML
wenzelm@25177
  2024
first.  Correspondingly, a method "normalization" is provided.  See
wenzelm@25177
  2025
further src/HOL/ex/NormalForm.thy and src/Tools/nbe.ML.
nipkow@19895
  2026
wenzelm@17996
  2027
* Alternative iff syntax "A <-> B" for equality on bool (with priority
wenzelm@17996
  2028
25 like -->); output depends on the "iff" print_mode, the default is
wenzelm@17996
  2029
"A = B" (with priority 50).
wenzelm@17996
  2030
wenzelm@21265
  2031
* Relations less (<) and less_eq (<=) are also available on type bool.
wenzelm@21265
  2032
Modified syntax to disallow nesting without explicit parentheses,
wenzelm@24800
  2033
e.g. "(x < y) < z" or "x < (y < z)", but NOT "x < y < z".  Potential
wenzelm@24800
  2034
INCOMPATIBILITY.
wenzelm@21265
  2035
nipkow@18674
  2036
* "LEAST x:A. P" expands to "LEAST x. x:A & P" (input only).
nipkow@18674
  2037
krauss@20716
  2038
* Relation composition operator "op O" now has precedence 75 and binds
krauss@20716
  2039
stronger than union and intersection. INCOMPATIBILITY.
krauss@20716
  2040
wenzelm@22126
  2041
* The old set interval syntax "{m..n(}" (and relatives) has been
wenzelm@22126
  2042
removed.  Use "{m..<n}" (and relatives) instead.
nipkow@19377
  2043
wenzelm@17865
  2044
* In the context of the assumption "~(s = t)" the Simplifier rewrites
wenzelm@24800
  2045
"t = s" to False (by simproc "neq").  INCOMPATIBILITY, consider using
wenzelm@24800
  2046
``declare [[simproc del: neq]]''.
wenzelm@24800
  2047
wenzelm@24800
  2048
* Simplifier: "m dvd n" where m and n are numbers is evaluated to
wenzelm@24800
  2049
True/False.
wenzelm@24800
  2050
wenzelm@24800
  2051
* Theorem Cons_eq_map_conv no longer declared as "simp".
nipkow@19211
  2052
ballarin@19279
  2053
* Theorem setsum_mult renamed to setsum_right_distrib.
ballarin@19279
  2054
nipkow@19211
  2055
* Prefer ex1I over ex_ex1I in single-step reasoning, e.g. by the
wenzelm@22126
  2056
``rule'' method.
wenzelm@22126
  2057
wenzelm@24800
  2058
* Reimplemented methods "sat" and "satx", with several improvements:
wenzelm@24800
  2059
goals no longer need to be stated as "<prems> ==> False", equivalences
wenzelm@24800
  2060
(i.e. "=" on type bool) are handled, variable names of the form
wenzelm@24800
  2061
"lit_<n>" are no longer reserved, significant speedup.
wenzelm@24800
  2062
wenzelm@24800
  2063
* Methods "sat" and "satx" can now replay MiniSat proof traces.
wenzelm@22126
  2064
zChaff is still supported as well.
wenzelm@22126
  2065
wenzelm@22126
  2066
* 'inductive' and 'datatype': provide projections of mutual rules,
wenzelm@22126
  2067
bundled as foo_bar.inducts;
wenzelm@22126
  2068
wenzelm@22126
  2069
* Library: moved theories Parity, GCD, Binomial, Infinite_Set to
wenzelm@22126
  2070
Library.
wenzelm@21256
  2071
wenzelm@21256
  2072
* Library: moved theory Accessible_Part to main HOL.
wenzelm@19572
  2073
wenzelm@18446
  2074
* Library: added theory Coinductive_List of potentially infinite lists
wenzelm@18446
  2075
as greatest fixed-point.
wenzelm@18399
  2076
wenzelm@19254
  2077
* Library: added theory AssocList which implements (finite) maps as
schirmer@19252
  2078
association lists.
webertj@17809
  2079
wenzelm@24800
  2080
* Method "evaluation" solves goals (i.e. a boolean expression)
wenzelm@24800
  2081
efficiently by compiling it to ML.  The goal is "proved" (via an
wenzelm@24800
  2082
oracle) if it evaluates to True.
wenzelm@20807
  2083
wenzelm@20807
  2084
* Linear arithmetic now splits certain operators (e.g. min, max, abs)
wenzelm@24800
  2085
also when invoked by the simplifier.  This results in the Simplifier
wenzelm@24800
  2086
being more powerful on arithmetic goals.  INCOMPATIBILITY.
wenzelm@24800
  2087
Configuration option fast_arith_split_limit=0 recovers the old
wenzelm@24800
  2088
behavior.
webertj@20217
  2089
wenzelm@22126
  2090
* Support for hex (0x20) and binary (0b1001) numerals.
wenzelm@19254
  2091
wenzelm@20807
  2092
* New method: reify eqs (t), where eqs are equations for an
wenzelm@20807
  2093
interpretation I :: 'a list => 'b => 'c and t::'c is an optional
wenzelm@20807
  2094
parameter, computes a term s::'b and a list xs::'a list and proves the
wenzelm@20807
  2095
theorem I xs s = t. This is also known as reification or quoting. The
wenzelm@20807
  2096
resulting theorem is applied to the subgoal to substitute t with I xs
wenzelm@20807
  2097
s.  If t is omitted, the subgoal itself is reified.
wenzelm@20807
  2098
wenzelm@20807
  2099
* New method: reflection corr_thm eqs (t). The parameters eqs and (t)
wenzelm@20807
  2100
are as explained above. corr_thm is a theorem for I vs (f t) = I vs t,
wenzelm@20807
  2101
where f is supposed to be a computable function (in the sense of code
wenzelm@20807
  2102
generattion). The method uses reify to compute s and xs as above then
wenzelm@20807
  2103
applies corr_thm and uses normalization by evaluation to "prove" f s =
wenzelm@20807
  2104
r and finally gets the theorem t = r, which is again applied to the
wenzelm@25177
  2105
subgoal. An Example is available in src/HOL/ex/ReflectionEx.thy.
wenzelm@25177
  2106
wenzelm@25177
  2107
* Reflection: Automatic reification now handels binding, an example is
wenzelm@25177
  2108
available in src/HOL/ex/ReflectionEx.thy
wenzelm@20807
  2109
wenzelm@25397
  2110
* HOL-Statespace: ``State Spaces: The Locale Way'' introduces a
schirmer@25409
  2111
command 'statespace' that is similar to 'record', but introduces an
wenzelm@25397
  2112
abstract specification based on the locale infrastructure instead of
wenzelm@25397
  2113
HOL types.  This leads to extra flexibility in composing state spaces,
wenzelm@25397
  2114
in particular multiple inheritance and renaming of components.
wenzelm@25397
  2115
wenzelm@25397
  2116
wenzelm@19653
  2117
*** HOL-Complex ***
wenzelm@19653
  2118
huffman@22971
  2119
* Hyperreal: Functions root and sqrt are now defined on negative real
huffman@22971
  2120
inputs so that root n (- x) = - root n x and sqrt (- x) = - sqrt x.
huffman@22971
  2121
Nonnegativity side conditions have been removed from many lemmas, so
huffman@22971
  2122
that more subgoals may now be solved by simplification; potential
huffman@22971
  2123
INCOMPATIBILITY.
huffman@22971
  2124
wenzelm@24800
  2125
* Real: new type classes formalize real normed vector spaces and
huffman@21791
  2126
algebras, using new overloaded constants scaleR :: real => 'a => 'a
huffman@21791
  2127
and norm :: 'a => real.
huffman@21791
  2128
wenzelm@24800
  2129
* Real: constant of_real :: real => 'a::real_algebra_1 injects from
wenzelm@24800
  2130
reals into other types. The overloaded constant Reals :: 'a set is now
wenzelm@24800
  2131
defined as range of_real; potential INCOMPATIBILITY.
wenzelm@24800
  2132
wenzelm@24800
  2133
* Real: proper support for ML code generation, including 'quickcheck'.
nipkow@23013
  2134
Reals are implemented as arbitrary precision rationals.
nipkow@23013
  2135
wenzelm@22126
  2136
* Hyperreal: Several constants that previously worked only for the
wenzelm@22126
  2137
reals have been generalized, so they now work over arbitrary vector
wenzelm@22126
  2138
spaces. Type annotations may need to be added in some cases; potential
wenzelm@22126
  2139
INCOMPATIBILITY.
huffman@21791
  2140
huffman@22972
  2141
  Infinitesimal  :: ('a::real_normed_vector) star set
huffman@22972
  2142
  HFinite        :: ('a::real_normed_vector) star set
huffman@22972
  2143
  HInfinite      :: ('a::real_normed_vector) star set
huffman@21791
  2144
  approx         :: ('a::real_normed_vector) star => 'a star => bool
huffman@21791
  2145
  monad          :: ('a::real_normed_vector) star => 'a star set
huffman@21791
  2146
  galaxy         :: ('a::real_normed_vector) star => 'a star set
huffman@22972
  2147
  (NS)LIMSEQ     :: [nat => 'a::real_normed_vector, 'a] => bool
huffman@21791
  2148
  (NS)convergent :: (nat => 'a::real_normed_vector) => bool
huffman@21791
  2149
  (NS)Bseq       :: (nat => 'a::real_normed_vector) => bool
huffman@21791
  2150
  (NS)Cauchy     :: (nat => 'a::real_normed_vector) => bool
huffman@21791
  2151
  (NS)LIM        :: ['a::real_normed_vector => 'b::real_normed_vector, 'a, 'b] => bool
huffman@21791
  2152
  is(NS)Cont     :: ['a::real_normed_vector => 'b::real_normed_vector, 'a] => bool
huffman@21791
  2153
  deriv          :: ['a::real_normed_field => 'a, 'a, 'a] => bool
huffman@22972
  2154
  sgn            :: 'a::real_normed_vector => 'a
huffman@23116
  2155
  exp            :: 'a::{recpower,real_normed_field,banach} => 'a
huffman@21791
  2156
huffman@21791
  2157
* Complex: Some complex-specific constants are now abbreviations for
wenzelm@22126
  2158
overloaded ones: complex_of_real = of_real, cmod = norm, hcmod =
wenzelm@22126
  2159
hnorm.  Other constants have been entirely removed in favor of the
wenzelm@22126
  2160
polymorphic versions (INCOMPATIBILITY):
huffman@21791
  2161
huffman@21791
  2162
  approx        <-- capprox
huffman@21791
  2163
  HFinite       <-- CFinite
huffman@21791
  2164
  HInfinite     <-- CInfinite
huffman@21791
  2165
  Infinitesimal <-- CInfinitesimal
huffman@21791
  2166
  monad         <-- cmonad
huffman@21791
  2167
  galaxy        <-- cgalaxy
huffman@21791
  2168
  (NS)LIM       <-- (NS)CLIM, (NS)CRLIM
huffman@21791
  2169
  is(NS)Cont    <-- is(NS)Contc, is(NS)contCR
huffman@21791
  2170
  (ns)deriv     <-- (ns)cderiv
huffman@21791
  2171
wenzelm@19653
  2172
wenzelm@24801
  2173
*** HOL-Algebra ***
wenzelm@24801
  2174
wenzelm@24801
  2175
* Formalisation of ideals and the quotient construction over rings.
wenzelm@24801
  2176
wenzelm@24801
  2177
* Order and lattice theory no longer based on records.
wenzelm@24801
  2178
INCOMPATIBILITY.
wenzelm@24801
  2179
wenzelm@24801
  2180
* Renamed lemmas least_carrier -> least_closed and greatest_carrier ->
wenzelm@24801
  2181
greatest_closed.  INCOMPATIBILITY.
wenzelm@24801
  2182
wenzelm@24801
  2183
* Method algebra is now set up via an attribute.  For examples see
wenzelm@24801
  2184
Ring.thy.  INCOMPATIBILITY: the method is now weaker on combinations
wenzelm@24801
  2185
of algebraic structures.
wenzelm@24801
  2186
wenzelm@24801
  2187
* Renamed theory CRing to Ring.
wenzelm@24801
  2188
wenzelm@24801
  2189
wenzelm@24801
  2190
*** HOL-Nominal ***
wenzelm@24801
  2191
wenzelm@25148
  2192
* Substantial, yet incomplete support for nominal datatypes (binding
wenzelm@25177
  2193
structures) based on HOL-Nominal logic.  See src/HOL/Nominal and
wenzelm@25177
  2194
src/HOL/Nominal/Examples.  Prospective users should consult
wenzelm@25148
  2195
http://isabelle.in.tum.de/nominal/
wenzelm@25148
  2196
wenzelm@24801
  2197
wenzelm@17878
  2198
*** ML ***
wenzelm@17878
  2199
wenzelm@24643
  2200
* ML basics: just one true type int, which coincides with IntInf.int
wenzelm@24643
  2201
(even on SML/NJ).
wenzelm@24643
  2202
wenzelm@22138
  2203
* ML within Isar: antiquotations allow to embed statically-checked
wenzelm@22138
  2204
formal entities in the source, referring to the context available at
wenzelm@22138
  2205
compile-time.  For example:
wenzelm@22138
  2206
wenzelm@25142
  2207
ML {* @{sort "{zero,one}"} *}
wenzelm@22138
  2208
ML {* @{typ "'a => 'b"} *}
wenzelm@22138
  2209
ML {* @{term "%x. x"} *}
wenzelm@22138
  2210
ML {* @{prop "x == y"} *}
wenzelm@22138
  2211
ML {* @{ctyp "'a => 'b"} *}
wenzelm@22138
  2212
ML {* @{cterm "%x. x"} *}
wenzelm@22138
  2213
ML {* @{cprop "x == y"} *}
wenzelm@22138
  2214
ML {* @{thm asm_rl} *}
wenzelm@22138
  2215
ML {* @{thms asm_rl} *}
wenzelm@24692
  2216
ML {* @{type_name c} *}
wenzelm@25142
  2217
ML {* @{type_syntax c} *}
wenzelm@22376
  2218
ML {* @{const_name c} *}
wenzelm@22376
  2219
ML {* @{const_syntax c} *}
wenzelm@22138
  2220
ML {* @{context} *}
wenzelm@22138
  2221
ML {* @{theory} *}
wenzelm@22138
  2222
ML {* @{theory Pure} *}
wenzelm@24692
  2223
ML {* @{theory_ref} *}
wenzelm@24692
  2224
ML {* @{theory_ref Pure} *}
wenzelm@22138
  2225
ML {* @{simpset} *}
wenzelm@22138
  2226
ML {* @{claset} *}
wenzelm@22138
  2227
ML {* @{clasimpset} *}
wenzelm@22138
  2228
wenzelm@22151
  2229
The same works for sources being ``used'' within an Isar context.
wenzelm@22151
  2230
wenzelm@22152
  2231
* ML in Isar: improved error reporting; extra verbosity with
wenzelm@24706
  2232
ML_Context.trace enabled.
wenzelm@22152
  2233
wenzelm@19032
  2234
* Pure/General/table.ML: the join operations now works via exceptions
wenzelm@24706
  2235
DUP/SAME instead of type option. This is simpler in simple cases, and
wenzelm@19081
  2236
admits slightly more efficient complex applications.
wenzelm@18446
  2237
wenzelm@24800
  2238
* Pure: 'advanced' translation functions (parse_translation etc.) now
wenzelm@24800
  2239
use Context.generic instead of just theory.
wenzelm@24800
  2240
wenzelm@18642
  2241
* Pure: datatype Context.generic joins theory/Proof.context and
wenzelm@18644
  2242
provides some facilities for code that works in either kind of
wenzelm@18642
  2243
context, notably GenericDataFun for uniform theory and proof data.
wenzelm@18642
  2244
wenzelm@18737
  2245
* Pure: simplified internal attribute type, which is now always
wenzelm@24706
  2246
Context.generic * thm -> Context.generic * thm. Global (theory) vs.
wenzelm@24706
  2247
local (Proof.context) attributes have been discontinued, while
wenzelm@24706
  2248
minimizing code duplication. Thm.rule_attribute and
wenzelm@24706
  2249
Thm.declaration_attribute build canonical attributes; see also structure
wenzelm@24706
  2250
Context for further operations on Context.generic, notably
wenzelm@24706
  2251
GenericDataFun. INCOMPATIBILITY, need to adapt attribute type
wenzelm@19006
  2252
declarations and definitions.
wenzelm@19006
  2253
wenzelm@24800
  2254
* Context data interfaces (Theory/Proof/GenericDataFun): removed
wenzelm@24800
  2255
name/print, uninitialized data defaults to ad-hoc copy of empty value,
wenzelm@24800
  2256
init only required for impure data. INCOMPATIBILITY: empty really need
wenzelm@24800
  2257
to be empty (no dependencies on theory content!)
wenzelm@24800
  2258
wenzelm@19508
  2259
* Pure/kernel: consts certification ignores sort constraints given in
wenzelm@24800
  2260
signature declarations. (This information is not relevant to the
wenzelm@24800
  2261
logic, but only for type inference.) SIGNIFICANT INTERNAL CHANGE,
wenzelm@24800
  2262
potential INCOMPATIBILITY.
wenzelm@19508
  2263
wenzelm@19508
  2264
* Pure: axiomatic type classes are now purely definitional, with
wenzelm@19508
  2265
explicit proofs of class axioms and super class relations performed
wenzelm@24706
  2266
internally. See Pure/axclass.ML for the main internal interfaces --
wenzelm@19508
  2267
notably AxClass.define_class supercedes AxClass.add_axclass, and
wenzelm@24706
  2268
AxClass.axiomatize_class/classrel/arity supersede
wenzelm@19508
  2269
Sign.add_classes/classrel/arities.
wenzelm@19508
  2270
wenzelm@19006
  2271
* Pure/Isar: Args/Attrib parsers operate on Context.generic --
wenzelm@19006
  2272
global/local versions on theory vs. Proof.context have been
wenzelm@19006
  2273
discontinued; Attrib.syntax and Method.syntax have been adapted
wenzelm@19006
  2274
accordingly.  INCOMPATIBILITY, need to adapt parser expressions for
wenzelm@19006
  2275
attributes, methods, etc.
wenzelm@18642
  2276
wenzelm@18446
  2277
* Pure: several functions of signature "... -> theory -> theory * ..."
wenzelm@18446
  2278
have been reoriented to "... -> theory -> ... * theory" in order to
wenzelm@18446
  2279
allow natural usage in combination with the ||>, ||>>, |-> and
wenzelm@18446
  2280
fold_map combinators.
haftmann@18051
  2281
wenzelm@21647
  2282
* Pure: official theorem names (closed derivations) and additional
wenzelm@21647
  2283
comments (tags) are now strictly separate.  Name hints -- which are
wenzelm@21647
  2284
maintained as tags -- may be attached any time without affecting the
wenzelm@21647
  2285
derivation.
wenzelm@21647
  2286
wenzelm@18020
  2287
* Pure: primitive rule lift_rule now takes goal cterm instead of an
wenzelm@18145
  2288
actual goal state (thm).  Use Thm.lift_rule (Thm.cprem_of st i) to
wenzelm@18020
  2289
achieve the old behaviour.
wenzelm@18020
  2290
wenzelm@18020
  2291
* Pure: the "Goal" constant is now called "prop", supporting a
wenzelm@18020
  2292
slightly more general idea of ``protecting'' meta-level rule
wenzelm@18020
  2293
statements.
wenzelm@18020
  2294
wenzelm@20040
  2295
* Pure: Logic.(un)varify only works in a global context, which is now
wenzelm@20040
  2296
enforced instead of silently assumed.  INCOMPATIBILITY, may use
wenzelm@20040
  2297
Logic.legacy_(un)varify as temporary workaround.
wenzelm@20040
  2298
wenzelm@20090
  2299
* Pure: structure Name provides scalable operations for generating
wenzelm@20090
  2300
internal variable names, notably Name.variants etc.  This replaces
wenzelm@20090
  2301
some popular functions from term.ML:
wenzelm@20090
  2302
wenzelm@20090
  2303
  Term.variant		->  Name.variant
wenzelm@24800
  2304
  Term.variantlist	->  Name.variant_list
wenzelm@20090
  2305
  Term.invent_names	->  Name.invent_list
wenzelm@20090
  2306
wenzelm@20090
  2307
Note that low-level renaming rarely occurs in new code -- operations
wenzelm@20090
  2308
from structure Variable are used instead (see below).
wenzelm@20090
  2309
wenzelm@20040
  2310
* Pure: structure Variable provides fundamental operations for proper
wenzelm@20040
  2311
treatment of fixed/schematic variables in a context.  For example,
wenzelm@20040
  2312
Variable.import introduces fixes for schematics of given facts and
wenzelm@20040
  2313
Variable.export reverses the effect (up to renaming) -- this replaces
wenzelm@20040
  2314
various freeze_thaw operations.
wenzelm@20040
  2315
wenzelm@18567
  2316
* Pure: structure Goal provides simple interfaces for
wenzelm@17981
  2317
init/conclude/finish and tactical prove operations (replacing former
wenzelm@20040
  2318
Tactic.prove).  Goal.prove is the canonical way to prove results
wenzelm@20040
  2319
within a given context; Goal.prove_global is a degraded version for
wenzelm@20040
  2320
theory level goals, including a global Drule.standard.  Note that
wenzelm@20040
  2321
OldGoals.prove_goalw_cterm has long been obsolete, since it is
wenzelm@20040
  2322
ill-behaved in a local proof context (e.g. with local fixes/assumes or
wenzelm@20040
  2323
in a locale context).
wenzelm@17981
  2324
wenzelm@24706
  2325
* Pure/Syntax: generic interfaces for parsing (Syntax.parse_term etc.)
wenzelm@24706
  2326
and type checking (Syntax.check_term etc.), with common combinations
wenzelm@24706
  2327
(Syntax.read_term etc.). These supersede former Sign.read_term etc.
wenzelm@24706
  2328
which are considered legacy and await removal.
wenzelm@24706
  2329
wenzelm@24920
  2330
* Pure/Syntax: generic interfaces for type unchecking
wenzelm@24920
  2331
(Syntax.uncheck_terms etc.) and unparsing (Syntax.unparse_term etc.),
wenzelm@24920
  2332
with common combinations (Syntax.pretty_term, Syntax.string_of_term
wenzelm@24920
  2333
etc.).  Former Sign.pretty_term, Sign.string_of_term etc. are still
wenzelm@24924
  2334
available for convenience, but refer to the very same operations using
wenzelm@24924
  2335
a mere theory instead of a full context.
wenzelm@24920
  2336
wenzelm@18815
  2337
* Isar: simplified treatment of user-level errors, using exception
wenzelm@18687
  2338
ERROR of string uniformly.  Function error now merely raises ERROR,
wenzelm@18686
  2339
without any side effect on output channels.  The Isar toplevel takes
wenzelm@18686
  2340
care of proper display of ERROR exceptions.  ML code may use plain
wenzelm@18686
  2341
handle/can/try; cat_error may be used to concatenate errors like this:
wenzelm@18686
  2342
wenzelm@18686
  2343
  ... handle ERROR msg => cat_error msg "..."
wenzelm@18686
  2344
wenzelm@18686
  2345
Toplevel ML code (run directly or through the Isar toplevel) may be
wenzelm@18687
  2346
embedded into the Isar toplevel with exception display/debug like
wenzelm@18687
  2347
this:
wenzelm@18686
  2348
wenzelm@18686
  2349
  Isar.toplevel (fn () => ...)
wenzelm@18686
  2350
wenzelm@18686
  2351
INCOMPATIBILITY, removed special transform_error facilities, removed
wenzelm@18686
  2352
obsolete variants of user-level exceptions (ERROR_MESSAGE,
wenzelm@18686
  2353
Context.PROOF, ProofContext.CONTEXT, Proof.STATE, ProofHistory.FAIL)
wenzelm@18686
  2354
-- use plain ERROR instead.
wenzelm@18686
  2355
wenzelm@18815
  2356
* Isar: theory setup now has type (theory -> theory), instead of a
wenzelm@18722
  2357
list.  INCOMPATIBILITY, may use #> to compose setup functions.
wenzelm@18722
  2358
wenzelm@24706
  2359
* Isar: ML toplevel pretty printer for type Proof.context, subject to
wenzelm@24706
  2360
ProofContext.debug/verbose flags.
wenzelm@18815
  2361
wenzelm@18815
  2362
* Isar: Toplevel.theory_to_proof admits transactions that modify the
wenzelm@18815
  2363
theory before entering a proof state.  Transactions now always see a
wenzelm@18815
  2364
quasi-functional intermediate checkpoint, both in interactive and
wenzelm@18590
  2365
batch mode.
wenzelm@18567
  2366
wenzelm@24867
  2367
* Isar: simplified interfaces for outer syntax.  Renamed
wenzelm@24867
  2368
OuterSyntax.add_keywords to OuterSyntax.keywords.  Removed
wenzelm@24867
  2369
OuterSyntax.add_parsers -- this functionality is now included in
wenzelm@24867
  2370
OuterSyntax.command etc.  INCOMPATIBILITY.
wenzelm@24867
  2371
wenzelm@17878
  2372
* Simplifier: the simpset of a running simplification process now
wenzelm@17878
  2373
contains a proof context (cf. Simplifier.the_context), which is the
wenzelm@17878
  2374
very context that the initial simpset has been retrieved from (by
wenzelm@17890
  2375
simpset_of/local_simpset_of).  Consequently, all plug-in components
wenzelm@17878
  2376
(solver, looper etc.) may depend on arbitrary proof data.
wenzelm@17878
  2377
wenzelm@17878
  2378
* Simplifier.inherit_context inherits the proof context (plus the
wenzelm@17878
  2379
local bounds) of the current simplification process; any simproc
wenzelm@17878
  2380
etc. that calls the Simplifier recursively should do this!  Removed
wenzelm@17878
  2381
former Simplifier.inherit_bounds, which is already included here --
wenzelm@17890
  2382
INCOMPATIBILITY.  Tools based on low-level rewriting may even have to
wenzelm@17890
  2383
specify an explicit context using Simplifier.context/theory_context.
wenzelm@17878
  2384
wenzelm@17878
  2385
* Simplifier/Classical Reasoner: more abstract interfaces
wenzelm@17878
  2386
change_simpset/claset for modifying the simpset/claset reference of a
wenzelm@17878
  2387
theory; raw versions simpset/claset_ref etc. have been discontinued --
wenzelm@17878
  2388
INCOMPATIBILITY.
wenzelm@17878
  2389
wenzelm@18540
  2390
* Provers: more generic wrt. syntax of object-logics, avoid hardwired
wenzelm@18540
  2391
"Trueprop" etc.
wenzelm@18540
  2392
wenzelm@17878
  2393
wenzelm@20988
  2394
*** System ***
wenzelm@20988
  2395
wenzelm@25433
  2396
* settings: the default heap location within ISABELLE_HOME_USER now
wenzelm@25433
  2397
includes ISABELLE_IDENTIFIER.  This simplifies use of multiple
wenzelm@25433
  2398
Isabelle installations.
wenzelm@21471
  2399
wenzelm@20988
  2400
* isabelle-process: option -S (secure mode) disables some critical
wenzelm@20988
  2401
operations, notably runtime compilation and evaluation of ML source
wenzelm@20988
  2402
code.
wenzelm@20988
  2403
wenzelm@24891
  2404
* Basic Isabelle mode for jEdit, see Isabelle/lib/jedit/.
wenzelm@24891
  2405
wenzelm@24801
  2406
* Support for parallel execution, using native multicore support of
wenzelm@24800
  2407
Poly/ML 5.1.  The theory loader exploits parallelism when processing
wenzelm@24800
  2408
independent theories, according to the given theory header
wenzelm@24800
  2409
specifications. The maximum number of worker threads is specified via
wenzelm@24800
  2410
usedir option -M or the "max-threads" setting in Proof General. A
wenzelm@24800
  2411
speedup factor of 1.5--3.5 can be expected on a 4-core machine, and up
wenzelm@24800
  2412
to 6 on a 8-core machine.  User-code needs to observe certain
wenzelm@24800
  2413
guidelines for thread-safe programming, see appendix A in the Isar
wenzelm@24800
  2414
Implementation manual.
wenzelm@24210
  2415
wenzelm@17754
  2416
wenzelm@25448
  2417
wenzelm@17720
  2418
New in Isabelle2005 (October 2005)
wenzelm@17720
  2419
----------------------------------
wenzelm@14655
  2420
wenzelm@14655
  2421
*** General ***
wenzelm@14655
  2422
nipkow@15130
  2423
* Theory headers: the new header syntax for Isar theories is
nipkow@15130
  2424
nipkow@15130
  2425
  theory <name>
wenzelm@16234
  2426
  imports <theory1> ... <theoryN>
wenzelm@16234
  2427
  uses <file1> ... <fileM>
nipkow@15130
  2428
  begin
nipkow@15130
  2429
wenzelm@16234
  2430
where the 'uses' part is optional.  The previous syntax
wenzelm@16234
  2431
wenzelm@16234
  2432
  theory <name> = <theory1> + ... + <theoryN>:
wenzelm@16234
  2433
wenzelm@16717
  2434
will disappear in the next release.  Use isatool fixheaders to convert
wenzelm@16717
  2435
existing theory files.  Note that there is no change in ancient
wenzelm@17371
  2436
non-Isar theories now, but these will disappear soon.
nipkow@15130
  2437
berghofe@15475
  2438
* Theory loader: parent theories can now also be referred to via
wenzelm@16234
  2439
relative and absolute paths.
wenzelm@16234
  2440
wenzelm@17408
  2441
* Command 'find_theorems' searches for a list of criteria instead of a
wenzelm@17408
  2442
list of constants. Known criteria are: intro, elim, dest, name:string,
wenzelm@17408
  2443
simp:term, and any term. Criteria can be preceded by '-' to select
wenzelm@17408
  2444
theorems that do not match. Intro, elim, dest select theorems that
wenzelm@17408
  2445
match the current goal, name:s selects theorems whose fully qualified
wenzelm@17408
  2446
name contain s, and simp:term selects all simplification rules whose
wenzelm@17408
  2447
lhs match term.  Any other term is interpreted as pattern and selects
wenzelm@17408
  2448
all theorems matching the pattern. Available in ProofGeneral under
wenzelm@17408
  2449
'ProofGeneral -> Find Theorems' or C-c C-f.  Example:
wenzelm@16234
  2450
wenzelm@17275
  2451
  C-c C-f (100) "(_::nat) + _ + _" intro -name: "HOL."
wenzelm@16234
  2452
wenzelm@16234
  2453
prints the last 100 theorems matching the pattern "(_::nat) + _ + _",
wenzelm@16234
  2454
matching the current goal as introduction rule and not having "HOL."
wenzelm@16234
  2455
in their name (i.e. not being defined in theory HOL).
wenzelm@16013
  2456
wenzelm@17408
  2457
* Command 'thms_containing' has been discontinued in favour of
wenzelm@17408
  2458
'find_theorems'; INCOMPATIBILITY.
wenzelm@17408
  2459
wenzelm@17385
  2460
* Communication with Proof General is now 8bit clean, which means that
wenzelm@17385
  2461
Unicode text in UTF-8 encoding may be used within theory texts (both
wenzelm@17408
  2462
formal and informal parts).  Cf. option -U of the Isabelle Proof
wenzelm@17538
  2463
General interface.  Here are some simple examples (cf. src/HOL/ex):
wenzelm@17538
  2464
wenzelm@17538
  2465
  http://isabelle.in.tum.de/library/HOL/ex/Hebrew.html
wenzelm@17538
  2466
  http://isabelle.in.tum.de/library/HOL/ex/Chinese.html
wenzelm@17385
  2467
wenzelm@17425
  2468
* Improved efficiency of the Simplifier and, to a lesser degree, the
wenzelm@17425
  2469
Classical Reasoner.  Typical big applications run around 2 times
wenzelm@17425
  2470
faster.
wenzelm@17425
  2471
wenzelm@15703
  2472
wenzelm@15703
  2473
*** Document preparation ***
wenzelm@15703
  2474
wenzelm@16234
  2475
* Commands 'display_drafts' and 'print_drafts' perform simple output
wenzelm@16234
  2476
of raw sources.  Only those symbols that do not require additional
wenzelm@16234
  2477
LaTeX packages (depending on comments in isabellesym.sty) are
wenzelm@16234
  2478
displayed properly, everything else is left verbatim.  isatool display
wenzelm@16234
  2479
and isatool print are used as front ends (these are subject to the
wenzelm@16234
  2480
DVI/PDF_VIEWER and PRINT_COMMAND settings, respectively).
wenzelm@16234
  2481
wenzelm@17047
  2482
* Command tags control specific markup of certain regions of text,
wenzelm@17047
  2483
notably folding and hiding.  Predefined tags include "theory" (for
wenzelm@17047
  2484
theory begin and end), "proof" for proof commands, and "ML" for
wenzelm@17047
  2485
commands involving ML code; the additional tags "visible" and
wenzelm@17047
  2486
"invisible" are unused by default.  Users may give explicit tag
wenzelm@17047
  2487
specifications in the text, e.g. ''by %invisible (auto)''.  The
wenzelm@17047
  2488
interpretation of tags is determined by the LaTeX job during document
wenzelm@17047
  2489
preparation: see option -V of isatool usedir, or options -n and -t of
wenzelm@17047
  2490
isatool document, or even the LaTeX macros \isakeeptag, \isafoldtag,
wenzelm@17047
  2491
\isadroptag.
wenzelm@17047
  2492
wenzelm@17047
  2493
Several document versions may be produced at the same time via isatool
wenzelm@17047
  2494
usedir (the generated index.html will link all of them).  Typical
wenzelm@17047
  2495
specifications include ''-V document=theory,proof,ML'' to present
wenzelm@17047
  2496
theory/proof/ML parts faithfully, ''-V outline=/proof,/ML'' to fold
wenzelm@17047
  2497
proof and ML commands, and ''-V mutilated=-theory,-proof,-ML'' to omit
wenzelm@17047
  2498
these parts without any formal replacement text.  The Isabelle site
wenzelm@17047
  2499
default settings produce ''document'' and ''outline'' versions as
wenzelm@17047
  2500
specified above.
wenzelm@16234
  2501
haftmann@17402
  2502
* Several new antiquotations:
wenzelm@15979
  2503
wenzelm@15979
  2504
  @{term_type term} prints a term with its type annotated;
wenzelm@15979
  2505
wenzelm@15979
  2506
  @{typeof term} prints the type of a term;
wenzelm@15979
  2507
wenzelm@16234
  2508
  @{const const} is the same as @{term const}, but checks that the
wenzelm@16234
  2509
  argument is a known logical constant;
wenzelm@15979
  2510
wenzelm@15979
  2511
  @{term_style style term} and @{thm_style style thm} print a term or
wenzelm@16234
  2512
  theorem applying a "style" to it
wenzelm@16234
  2513
wenzelm@17117
  2514
  @{ML text}
wenzelm@17117
  2515
wenzelm@16234
  2516
Predefined styles are 'lhs' and 'rhs' printing the lhs/rhs of
wenzelm@16234
  2517
definitions, equations, inequations etc., 'concl' printing only the
schirmer@17393
  2518
conclusion of a meta-logical statement theorem, and 'prem1' .. 'prem19'
wenzelm@16234
  2519
to print the specified premise.  TermStyle.add_style provides an ML
wenzelm@16234
  2520
interface for introducing further styles.  See also the "LaTeX Sugar"
wenzelm@17117
  2521
document practical applications.  The ML antiquotation prints
wenzelm@17117
  2522
type-checked ML expressions verbatim.
wenzelm@16234
  2523
wenzelm@17259
  2524
* Markup commands 'chapter', 'section', 'subsection', 'subsubsection',
wenzelm@17259
  2525
and 'text' support optional locale specification '(in loc)', which
wenzelm@17269
  2526
specifies the default context for interpreting antiquotations.  For
wenzelm@17269
  2527
example: 'text (in lattice) {* @{thm inf_assoc}*}'.
wenzelm@17259
  2528
wenzelm@17259
  2529
* Option 'locale=NAME' of antiquotations specifies an alternative
wenzelm@17259
  2530
context interpreting the subsequent argument.  For example: @{thm
wenzelm@17269
  2531
[locale=lattice] inf_assoc}.
wenzelm@17259
  2532
wenzelm@17097
  2533
* Proper output of proof terms (@{prf ...} and @{full_prf ...}) within
wenzelm@17097
  2534
a proof context.
wenzelm@17097
  2535
wenzelm@17097
  2536
* Proper output of antiquotations for theory commands involving a
wenzelm@17097
  2537
proof context (such as 'locale' or 'theorem (in loc) ...').
wenzelm@17097
  2538
wenzelm@17193
  2539
* Delimiters of outer tokens (string etc.) now produce separate LaTeX
wenzelm@17193
  2540
macros (\isachardoublequoteopen, isachardoublequoteclose etc.).
wenzelm@17193
  2541
wenzelm@17193
  2542
* isatool usedir: new option -C (default true) controls whether option
wenzelm@17193
  2543
-D should include a copy of the original document directory; -C false
wenzelm@17193
  2544
prevents unwanted effects such as copying of administrative CVS data.
wenzelm@17193
  2545
wenzelm@16234
  2546
wenzelm@16234
  2547
*** Pure ***
wenzelm@16234
  2548
wenzelm@16234
  2549
* Considerably improved version of 'constdefs' command.  Now performs
wenzelm@16234
  2550
automatic type-inference of declared constants; additional support for
wenzelm@16234
  2551
local structure declarations (cf. locales and HOL records), see also
wenzelm@16234
  2552
isar-ref manual.  Potential INCOMPATIBILITY: need to observe strictly
wenzelm@16234
  2553
sequential dependencies of definitions within a single 'constdefs'
wenzelm@16234
  2554
section; moreover, the declared name needs to be an identifier.  If
wenzelm@16234
  2555
all fails, consider to fall back on 'consts' and 'defs' separately.
wenzelm@16234
  2556
wenzelm@16234
  2557
* Improved indexed syntax and implicit structures.  First of all,
wenzelm@16234
  2558
indexed syntax provides a notational device for subscripted
wenzelm@16234
  2559
application, using the new syntax \<^bsub>term\<^esub> for arbitrary
wenzelm@16234
  2560
expressions.  Secondly, in a local context with structure
wenzelm@16234
  2561
declarations, number indexes \<^sub>n or the empty index (default
wenzelm@16234
  2562
number 1) refer to a certain fixed variable implicitly; option
wenzelm@16234
  2563
show_structs controls printing of implicit structures.  Typical
wenzelm@16234
  2564
applications of these concepts involve record types and locales.
wenzelm@16234
  2565
wenzelm@16234
  2566
* New command 'no_syntax' removes grammar declarations (and
wenzelm@16234
  2567
translations) resulting from the given syntax specification, which is
wenzelm@16234
  2568
interpreted in the same manner as for the 'syntax' command.
wenzelm@16234
  2569
wenzelm@16234
  2570
* 'Advanced' translation functions (parse_translation etc.) may depend
wenzelm@16234
  2571
on the signature of the theory context being presently used for
wenzelm@16234
  2572
parsing/printing, see also isar-ref manual.
wenzelm@16234
  2573
wenzelm@16856
  2574
* Improved 'oracle' command provides a type-safe interface to turn an
wenzelm@16856
  2575
ML expression of type theory -> T -> term into a primitive rule of
wenzelm@16856
  2576
type theory -> T -> thm (i.e. the functionality of Thm.invoke_oracle
wenzelm@16856
  2577
is already included here); see also FOL/ex/IffExample.thy;
wenzelm@16856
  2578
INCOMPATIBILITY.
wenzelm@16856
  2579
wenzelm@17275
  2580
* axclass: name space prefix for class "c" is now "c_class" (was "c"
wenzelm@17275
  2581
before); "cI" is no longer bound, use "c.intro" instead.
wenzelm@17275
  2582
INCOMPATIBILITY.  This change avoids clashes of fact bindings for
wenzelm@17275
  2583
axclasses vs. locales.
wenzelm@17275
  2584
wenzelm@16234
  2585
* Improved internal renaming of symbolic identifiers -- attach primes
wenzelm@16234
  2586
instead of base 26 numbers.
wenzelm@16234
  2587
wenzelm@16234
  2588
* New flag show_question_marks controls printing of leading question
wenzelm@16234
  2589
marks in schematic variable names.
wenzelm@16234
  2590
wenzelm@16234
  2591
* In schematic variable names, *any* symbol following \<^isub> or
wenzelm@16234
  2592
\<^isup> is now treated as part of the base name.  For example, the
wenzelm@16234
  2593
following works without printing of awkward ".0" indexes:
wenzelm@16234
  2594
wenzelm@16234
  2595
  lemma "x\<^isub>1 = x\<^isub>2 ==> x\<^isub>2 = x\<^isub>1"
wenzelm@16234
  2596
    by simp
wenzelm@16234
  2597
wenzelm@16234
  2598
* Inner syntax includes (*(*nested*) comments*).
wenzelm@16234
  2599
wenzelm@17548
  2600
* Pretty printer now supports unbreakable blocks, specified in mixfix
wenzelm@16234
  2601
annotations as "(00...)".
wenzelm@16234
  2602
wenzelm@16234
  2603
* Clear separation of logical types and nonterminals, where the latter
wenzelm@16234
  2604
may only occur in 'syntax' specifications or type abbreviations.
wenzelm@16234
  2605
Before that distinction was only partially implemented via type class
wenzelm@16234
  2606
"logic" vs. "{}".  Potential INCOMPATIBILITY in rare cases of improper
wenzelm@16234
  2607
use of 'types'/'consts' instead of 'nonterminals'/'syntax'.  Some very
wenzelm@16234
  2608
exotic syntax specifications may require further adaption
wenzelm@17691
  2609
(e.g. Cube/Cube.thy).
wenzelm@16234
  2610
wenzelm@16234
  2611
* Removed obsolete type class "logic", use the top sort {} instead.
wenzelm@16234
  2612
Note that non-logical types should be declared as 'nonterminals'
wenzelm@16234
  2613
rather than 'types'.  INCOMPATIBILITY for new object-logic
wenzelm@16234
  2614
specifications.
wenzelm@16234
  2615
ballarin@17095
  2616
* Attributes 'induct' and 'cases': type or set names may now be
ballarin@17095
  2617
locally fixed variables as well.
ballarin@17095
  2618
wenzelm@16234
  2619
* Simplifier: can now control the depth to which conditional rewriting
wenzelm@16234
  2620
is traced via the PG menu Isabelle -> Settings -> Trace Simp Depth
wenzelm@16234
  2621
Limit.
wenzelm@16234
  2622
wenzelm@16234
  2623
* Simplifier: simplification procedures may now take the current
wenzelm@16234
  2624
simpset into account (cf. Simplifier.simproc(_i) / mk_simproc
wenzelm@16234
  2625
interface), which is very useful for calling the Simplifier