NEWS
author haftmann
Thu Sep 23 09:53:52 2010 +0200 (2010-09-23)
changeset 39644 ad436fa9fc5b
parent 39616 8052101883c3
child 39689 78b185bf7660
permissions -rw-r--r--
CONTRIBUTORS and NEWS
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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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* Explicit treatment of UTF8 sequences as Isabelle symbols, such that
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a Unicode character is treated as a single symbol, not a sequence of
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non-ASCII bytes as before.  Since Isabelle/ML string literals may
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contain symbols without further backslash escapes, Unicode can now be
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used here as well.  Recall that Symbol.explode in ML provides a
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consistent view on symbols, while raw explode (or String.explode)
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merely give a byte-oriented representation.
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* Theory loading: only the master source file is looked-up in the
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implicit load path, all other files are addressed relatively to its
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directory.  Minor INCOMPATIBILITY, subtle change in semantics.
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* Special treatment of ML file names has been discontinued.
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Historically, optional extensions .ML or .sml were added on demand --
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at the cost of clarity of file dependencies.  Recall that Isabelle/ML
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files exclusively use the .ML extension.  Minor INCOMPATIBILTY.
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* Various options that affect pretty printing etc. are now properly
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handled within the context via configuration options, instead of
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unsynchronized references.  There are both ML Config.T entities and
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Isar declaration attributes to access these.
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  ML (Config.T)                 Isar (attribute)
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  eta_contract                  eta_contract
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  show_brackets                 show_brackets
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  show_sorts                    show_sorts
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  show_types                    show_types
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  show_question_marks           show_question_marks
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  show_consts                   show_consts
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  Syntax.ambiguity_level        syntax_ambiguity_level
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  Goal_Display.goals_limit      goals_limit
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  Goal_Display.show_main_goal   show_main_goal
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  Thy_Output.display            thy_output_display
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  Thy_Output.quotes             thy_output_quotes
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  Thy_Output.indent             thy_output_indent
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  Thy_Output.source             thy_output_source
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  Thy_Output.break              thy_output_break
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Note that corresponding "..._default" references in ML may be only
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changed globally at the ROOT session setup, but *not* within a theory.
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*** Pure ***
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* Interpretation command 'interpret' accepts a list of equations like
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'interpretation' does.
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* Diagnostic command 'print_interps' prints interpretations in proofs
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in addition to interpretations in theories.
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* Discontinued obsolete 'global' and 'local' commands to manipulate
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the theory name space.  Rare INCOMPATIBILITY.  The ML functions
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Sign.root_path and Sign.local_path may be applied directly where this
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feature is still required for historical reasons.
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* Discontinued ancient 'constdefs' command.  INCOMPATIBILITY, use
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'definition' instead.
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* Document antiquotations 'class' and 'type' for printing classes
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and type constructors.
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*** HOL ***
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* Improved infrastructure for term evaluation using code generator
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techniques, in particular static evaluation conversions.
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* String.literal is a type, but not a datatype. INCOMPATIBILITY.
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* Renamed lemmas:
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  expand_fun_eq -> fun_eq_iff
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  expand_set_eq -> set_eq_iff
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  set_ext -> set_eqI
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 INCOMPATIBILITY.
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* Renamed class eq and constant eq (for code generation) to class equal
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and constant equal, plus renaming of related facts and various tuning.
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INCOMPATIBILITY.
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* Scala (2.8 or higher) has been added to the target languages of
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the code generator.
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* Dropped type classes mult_mono and mult_mono1.  INCOMPATIBILITY.
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* Theory SetsAndFunctions has been split into Function_Algebras and Set_Algebras;
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canonical names for instance definitions for functions; various improvements.
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INCOMPATIBILITY.
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* Records: logical foundation type for records do not carry a '_type' suffix
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any longer.  INCOMPATIBILITY.
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* Code generation for records: more idiomatic representation of record types.
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Warning: records are not covered by ancient SML code generation any longer.
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INCOMPATIBILITY.  In cases of need, a suitable rep_datatype declaration
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helps to succeed then:
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  record 'a foo = ...
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  ...
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  rep_datatype foo_ext ...
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* Session Imperative_HOL: revamped, corrected dozens of inadequacies.
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INCOMPATIBILITY.
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* Quickcheck in locales considers interpretations of that locale for
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counter example search.
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* Theory Library/Monad_Syntax provides do-syntax for monad types.  Syntax
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in Library/State_Monad has been changed to avoid ambiguities.
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INCOMPATIBILITY.
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* Code generator: export_code without explicit file declaration prints
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to standard output.  INCOMPATIBILITY.
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* Abolished symbol type names:  "prod" and "sum" replace "*" and "+"
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respectively.  INCOMPATIBILITY.
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* Constant "split" has been merged with constant "prod_case";  names
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of ML functions, facts etc. involving split have been retained so far,
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though.  INCOMPATIBILITY.
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* Dropped old infix syntax "mem" for List.member;  use "in set"
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instead.  INCOMPATIBILITY.
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* Refactoring of code-generation specific operations in List.thy
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  constants
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    null ~> List.null
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  facts
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    mem_iff ~> member_def
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    null_empty ~> null_def
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INCOMPATIBILITY.  Note that these were not suppossed to be used
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regularly unless for striking reasons;  their main purpose was code
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generation.
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* Some previously unqualified names have been qualified:
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  types
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    bool ~> HOL.bool
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    nat ~> Nat.nat
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  constants
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    Trueprop ~> HOL.Trueprop
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    True ~> HOL.True
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    False ~> HOL.False
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    op & ~> HOL.conj
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    op | ~> HOL.disj
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    op --> ~> HOL.implies
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    op = ~> HOL.eq
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    Not ~> HOL.Not
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    The ~> HOL.The
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    All ~> HOL.All
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    Ex ~> HOL.Ex
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    Ex1 ~> HOL.Ex1
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    Let ~> HOL.Let
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    If ~> HOL.If
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    Ball ~> Set.Ball
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    Bex ~> Set.Bex
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    Suc ~> Nat.Suc
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    Pair ~> Product_Type.Pair
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    fst ~> Product_Type.fst
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    snd ~> Product_Type.snd
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    curry ~> Product_Type.curry
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    op : ~> Set.member
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    Collect ~> Set.Collect
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INCOMPATIBILITY.
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* Removed simplifier congruence rule of "prod_case", as has for long
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been the case with "split".  INCOMPATIBILITY.
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* Datatype package: theorems generated for executable equality
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(class eq) carry proper names and are treated as default code
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equations.
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* Removed lemma Option.is_none_none (Duplicate of is_none_def).
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INCOMPATIBILITY.
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* List.thy: use various operations from the Haskell prelude when
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generating Haskell code.
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* Multiset.thy: renamed empty_idemp -> empty_neutral
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* code_simp.ML and method code_simp: simplification with rules determined
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by code generator.
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* code generator: do not print function definitions for case
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combinators any longer.
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* Multivariate Analysis: Introduced a type class for euclidean space. Most
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theorems are now stated in terms of euclidean spaces instead of finite
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cartesian products.
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  types
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    real ^ 'n ~>  'a::real_vector
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              ~>  'a::euclidean_space
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              ~>  'a::ordered_euclidean_space
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        (depends on your needs)
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  constants
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     _ $ _        ~> _ $$ _
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     \<chi> x. _  ~> \<chi>\<chi> x. _
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     CARD('n)     ~> DIM('a)
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Also note that the indices are now natural numbers and not from some finite
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type. Finite cartesian products of euclidean spaces, products of euclidean
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spaces the real and complex numbers are instantiated to be euclidean_spaces.
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INCOMPATIBILITY.
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* Probability: Introduced pinfreal as real numbers with infinity. Use pinfreal
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as value for measures. Introduces Lebesgue Measure based on the integral in
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Multivariate Analysis. Proved Radon Nikodym for arbitrary sigma finite measure
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spaces.
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 INCOMPATIBILITY.
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* Inductive package: offers new command "inductive_simps" to automatically
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derive instantiated and simplified equations for inductive predicates,
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similar to inductive_cases.
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* "bij f" is now an abbreviation of "bij_betw f UNIV UNIV". surj_on is a
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generalization of surj, and "surj f" is now a abbreviation of "surj_on f UNIV".
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The theorems bij_def and surj_def are unchanged.
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*** FOL ***
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* All constant names are now qualified.  INCOMPATIBILITY.
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*** ZF ***
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* All constant names are now qualified.  INCOMPATIBILITY.
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*** ML ***
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* Renamed setmp_noncritical to Unsynchronized.setmp to emphasize its
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meaning.
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* Renamed structure PureThy to Pure_Thy and moved most of its
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operations to structure Global_Theory, to emphasize that this is
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rarely-used global-only stuff.
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* Discontinued Output.debug.  Minor INCOMPATIBILITY, use plain writeln
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instead (or tracing for high-volume output).
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* Configuration option show_question_marks only affects regular pretty
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printing of types and terms, not raw Term.string_of_vname.
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* ML_Context.thm and ML_Context.thms are no longer pervasive.  Rare
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INCOMPATIBILITY, superseded by static antiquotations @{thm} and
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@{thms} for most purposes.
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* ML structure Unsynchronized never opened, not even in Isar
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interaction mode as before.  Old Unsynchronized.set etc. have been
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discontinued -- use plain := instead.  This should be *rare* anyway,
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since modern tools always work via official context data, notably
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configuration options.
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* ML antiquotations @{theory} and @{theory_ref} refer to named
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theories from the ancestry of the current context, not any accidental
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theory loader state as before.  Potential INCOMPATIBILITY, subtle
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change in semantics.
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* Parallel and asynchronous execution requires special care concerning
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interrupts.  Structure Exn provides some convenience functions that
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avoid working directly with raw Interrupt.  User code must not absorb
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interrupts -- intermediate handling (for cleanup etc.) needs to be
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followed by re-raising of the original exception.  Another common
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source of mistakes are "handle _" patterns, which make the meaning of
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the program subject to physical effects of the environment.
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*** System ***
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* Discontinued support for Poly/ML 5.0 and 5.1 versions.
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New in Isabelle2009-2 (June 2010)
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---------------------------------
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*** General ***
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* Authentic syntax for *all* logical entities (type classes, type
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constructors, term constants): provides simple and robust
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correspondence between formal entities and concrete syntax.  Within
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the parse tree / AST representations, "constants" are decorated by
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their category (class, type, const) and spelled out explicitly with
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their full internal name.
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Substantial INCOMPATIBILITY concerning low-level syntax declarations
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and translations (translation rules and translation functions in ML).
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Some hints on upgrading:
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  - Many existing uses of 'syntax' and 'translations' can be replaced
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    by more modern 'type_notation', 'notation' and 'abbreviation',
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    which are independent of this issue.
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  - 'translations' require markup within the AST; the term syntax
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    provides the following special forms:
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      CONST c   -- produces syntax version of constant c from context
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      XCONST c  -- literally c, checked as constant from context
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      c         -- literally c, if declared by 'syntax'
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    Plain identifiers are treated as AST variables -- occasionally the
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    system indicates accidental variables via the error "rhs contains
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    extra variables".
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    Type classes and type constructors are marked according to their
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    concrete syntax.  Some old translations rules need to be written
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    for the "type" category, using type constructor application
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    instead of pseudo-term application of the default category
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    "logic".
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  - 'parse_translation' etc. in ML may use the following
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    antiquotations:
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      @{class_syntax c}   -- type class c within parse tree / AST
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      @{term_syntax c}    -- type constructor c within parse tree / AST
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      @{const_syntax c}   -- ML version of "CONST c" above
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      @{syntax_const c}   -- literally c (checked wrt. 'syntax' declarations)
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  - Literal types within 'typed_print_translations', i.e. those *not*
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    represented as pseudo-terms are represented verbatim.  Use @{class
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    c} or @{type_name c} here instead of the above syntax
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    antiquotations.
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Note that old non-authentic syntax was based on unqualified base
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names, so all of the above "constant" names would coincide.  Recall
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that 'print_syntax' and ML_command "set Syntax.trace_ast" help to
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diagnose syntax problems.
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* Type constructors admit general mixfix syntax, not just infix.
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* Concrete syntax may be attached to local entities without a proof
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body, too.  This works via regular mixfix annotations for 'fix',
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'def', 'obtain' etc. or via the explicit 'write' command, which is
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similar to the 'notation' command in theory specifications.
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* Discontinued unnamed infix syntax (legacy feature for many years) --
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need to specify constant name and syntax separately.  Internal ML
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datatype constructors have been renamed from InfixName to Infix etc.
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Minor INCOMPATIBILITY.
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* Schematic theorem statements need to be explicitly markup as such,
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via commands 'schematic_lemma', 'schematic_theorem',
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'schematic_corollary'.  Thus the relevance of the proof is made
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syntactically clear, which impacts performance in a parallel or
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asynchronous interactive environment.  Minor INCOMPATIBILITY.
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* Use of cumulative prems via "!" in some proof methods has been
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discontinued (old legacy feature).
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   370
* References 'trace_simp' and 'debug_simp' have been replaced by
wenzelm@36857
   371
configuration options stored in the context. Enabling tracing (the
wenzelm@36857
   372
case of debugging is similar) in proofs works via
wenzelm@36857
   373
wenzelm@36857
   374
  using [[trace_simp = true]]
wenzelm@36857
   375
wenzelm@36857
   376
Tracing is then active for all invocations of the simplifier in
wenzelm@36857
   377
subsequent goal refinement steps. Tracing may also still be enabled or
wenzelm@36857
   378
disabled via the ProofGeneral settings menu.
boehmes@35979
   379
wenzelm@36177
   380
* Separate commands 'hide_class', 'hide_type', 'hide_const',
wenzelm@36177
   381
'hide_fact' replace the former 'hide' KIND command.  Minor
wenzelm@36177
   382
INCOMPATIBILITY.
wenzelm@36177
   383
wenzelm@37298
   384
* Improved parallelism of proof term normalization: usedir -p2 -q0 is
wenzelm@37298
   385
more efficient than combinations with -q1 or -q2.
wenzelm@37298
   386
wenzelm@35260
   387
haftmann@34170
   388
*** Pure ***
haftmann@34170
   389
wenzelm@37351
   390
* Proofterms record type-class reasoning explicitly, using the
wenzelm@37351
   391
"unconstrain" operation internally.  This eliminates all sort
wenzelm@37351
   392
constraints from a theorem and proof, introducing explicit
wenzelm@37351
   393
OFCLASS-premises.  On the proof term level, this operation is
wenzelm@37351
   394
automatically applied at theorem boundaries, such that closed proofs
wenzelm@37351
   395
are always free of sort constraints.  INCOMPATIBILITY for tools that
wenzelm@37351
   396
inspect proof terms.
haftmann@36147
   397
wenzelm@35765
   398
* Local theory specifications may depend on extra type variables that
wenzelm@35765
   399
are not present in the result type -- arguments TYPE('a) :: 'a itself
wenzelm@35765
   400
are added internally.  For example:
wenzelm@35765
   401
wenzelm@35765
   402
  definition unitary :: bool where "unitary = (ALL (x::'a) y. x = y)"
wenzelm@35765
   403
wenzelm@37351
   404
* Predicates of locales introduced by classes carry a mandatory
wenzelm@37351
   405
"class" prefix.  INCOMPATIBILITY.
wenzelm@37351
   406
wenzelm@37351
   407
* Vacuous class specifications observe default sort.  INCOMPATIBILITY.
wenzelm@37351
   408
wenzelm@37351
   409
* Old 'axclass' command has been discontinued.  INCOMPATIBILITY, use
wenzelm@37351
   410
'class' instead.
wenzelm@37351
   411
wenzelm@37351
   412
* Command 'code_reflect' allows to incorporate generated ML code into
wenzelm@37351
   413
runtime environment; replaces immature code_datatype antiquotation.
wenzelm@37351
   414
INCOMPATIBILITY.
wenzelm@37351
   415
wenzelm@37351
   416
* Code generator: simple concept for abstract datatypes obeying
wenzelm@37351
   417
invariants.
wenzelm@37351
   418
wenzelm@36857
   419
* Code generator: details of internal data cache have no impact on the
wenzelm@36857
   420
user space functionality any longer.
wenzelm@36857
   421
wenzelm@37351
   422
* Methods "unfold_locales" and "intro_locales" ignore non-locale
wenzelm@37351
   423
subgoals.  This is more appropriate for interpretations with 'where'.
wenzelm@36857
   424
INCOMPATIBILITY.
haftmann@34170
   425
wenzelm@36356
   426
* Command 'example_proof' opens an empty proof body.  This allows to
wenzelm@36356
   427
experiment with Isar, without producing any persistent result.
wenzelm@36356
   428
wenzelm@35413
   429
* Commands 'type_notation' and 'no_type_notation' declare type syntax
wenzelm@35413
   430
within a local theory context, with explicit checking of the
wenzelm@35413
   431
constructors involved (in contrast to the raw 'syntax' versions).
wenzelm@35413
   432
wenzelm@36178
   433
* Commands 'types' and 'typedecl' now work within a local theory
wenzelm@36178
   434
context -- without introducing dependencies on parameters or
wenzelm@36178
   435
assumptions, which is not possible in Isabelle/Pure.
wenzelm@35681
   436
wenzelm@36857
   437
* Command 'defaultsort' has been renamed to 'default_sort', it works
wenzelm@36857
   438
within a local theory context.  Minor INCOMPATIBILITY.
wenzelm@36454
   439
haftmann@34170
   440
haftmann@33993
   441
*** HOL ***
haftmann@33993
   442
wenzelm@37351
   443
* Command 'typedef' now works within a local theory context -- without
wenzelm@37351
   444
introducing dependencies on parameters or assumptions, which is not
wenzelm@37351
   445
possible in Isabelle/Pure/HOL.  Note that the logical environment may
wenzelm@37351
   446
contain multiple interpretations of local typedefs (with different
wenzelm@37351
   447
non-emptiness proofs), even in a global theory context.
wenzelm@37351
   448
wenzelm@37351
   449
* New package for quotient types.  Commands 'quotient_type' and
wenzelm@37351
   450
'quotient_definition' may be used for defining types and constants by
wenzelm@37351
   451
quotient constructions.  An example is the type of integers created by
wenzelm@37351
   452
quotienting pairs of natural numbers:
wenzelm@37380
   453
wenzelm@37351
   454
  fun
wenzelm@37380
   455
    intrel :: "(nat * nat) => (nat * nat) => bool"
wenzelm@37351
   456
  where
wenzelm@37351
   457
    "intrel (x, y) (u, v) = (x + v = u + y)"
wenzelm@37351
   458
wenzelm@37380
   459
  quotient_type int = "nat * nat" / intrel
wenzelm@37351
   460
    by (auto simp add: equivp_def expand_fun_eq)
wenzelm@37380
   461
wenzelm@37351
   462
  quotient_definition
wenzelm@37351
   463
    "0::int" is "(0::nat, 0::nat)"
wenzelm@37351
   464
wenzelm@37351
   465
The method "lifting" can be used to lift of theorems from the
wenzelm@37351
   466
underlying "raw" type to the quotient type.  The example
wenzelm@37351
   467
src/HOL/Quotient_Examples/FSet.thy includes such a quotient
wenzelm@37351
   468
construction and provides a reasoning infrastructure for finite sets.
wenzelm@37351
   469
wenzelm@37351
   470
* Renamed Library/Quotient.thy to Library/Quotient_Type.thy to avoid
wenzelm@37351
   471
clash with new theory Quotient in Main HOL.
wenzelm@37351
   472
wenzelm@37351
   473
* Moved the SMT binding into the main HOL session, eliminating
wenzelm@37351
   474
separate HOL-SMT session.
wenzelm@37351
   475
haftmann@37020
   476
* List membership infix mem operation is only an input abbreviation.
haftmann@37020
   477
INCOMPATIBILITY.
haftmann@37020
   478
wenzelm@37144
   479
* Theory Library/Word.thy has been removed.  Use library Word/Word.thy
wenzelm@37144
   480
for future developements; former Library/Word.thy is still present in
wenzelm@37144
   481
the AFP entry RSAPPS.
haftmann@36963
   482
wenzelm@36857
   483
* Theorem Int.int_induct renamed to Int.int_of_nat_induct and is no
wenzelm@36857
   484
longer shadowed.  INCOMPATIBILITY.
haftmann@36808
   485
huffman@36836
   486
* Dropped theorem duplicate comp_arith; use semiring_norm instead.
huffman@36836
   487
INCOMPATIBILITY.
huffman@36836
   488
huffman@36836
   489
* Dropped theorem RealPow.real_sq_order; use power2_le_imp_le instead.
huffman@36836
   490
INCOMPATIBILITY.
haftmann@36714
   491
wenzelm@36857
   492
* Dropped normalizing_semiring etc; use the facts in semiring classes
wenzelm@36857
   493
instead.  INCOMPATIBILITY.
wenzelm@36857
   494
huffman@36979
   495
* Dropped several real-specific versions of lemmas about floor and
wenzelm@37351
   496
ceiling; use the generic lemmas from theory "Archimedean_Field"
wenzelm@37351
   497
instead.  INCOMPATIBILITY.
huffman@36979
   498
huffman@36979
   499
  floor_number_of_eq         ~> floor_number_of
huffman@36979
   500
  le_floor_eq_number_of      ~> number_of_le_floor
huffman@36979
   501
  le_floor_eq_zero           ~> zero_le_floor
huffman@36979
   502
  le_floor_eq_one            ~> one_le_floor
huffman@36979
   503
  floor_less_eq_number_of    ~> floor_less_number_of
huffman@36979
   504
  floor_less_eq_zero         ~> floor_less_zero
huffman@36979
   505
  floor_less_eq_one          ~> floor_less_one
huffman@36979
   506
  less_floor_eq_number_of    ~> number_of_less_floor
huffman@36979
   507
  less_floor_eq_zero         ~> zero_less_floor
huffman@36979
   508
  less_floor_eq_one          ~> one_less_floor
huffman@36979
   509
  floor_le_eq_number_of      ~> floor_le_number_of
huffman@36979
   510
  floor_le_eq_zero           ~> floor_le_zero
huffman@36979
   511
  floor_le_eq_one            ~> floor_le_one
huffman@36979
   512
  floor_subtract_number_of   ~> floor_diff_number_of
huffman@36979
   513
  floor_subtract_one         ~> floor_diff_one
huffman@36979
   514
  ceiling_number_of_eq       ~> ceiling_number_of
huffman@36979
   515
  ceiling_le_eq_number_of    ~> ceiling_le_number_of
huffman@36979
   516
  ceiling_le_zero_eq         ~> ceiling_le_zero
huffman@36979
   517
  ceiling_le_eq_one          ~> ceiling_le_one
huffman@36979
   518
  less_ceiling_eq_number_of  ~> number_of_less_ceiling
huffman@36979
   519
  less_ceiling_eq_zero       ~> zero_less_ceiling
huffman@36979
   520
  less_ceiling_eq_one        ~> one_less_ceiling
huffman@36979
   521
  ceiling_less_eq_number_of  ~> ceiling_less_number_of
huffman@36979
   522
  ceiling_less_eq_zero       ~> ceiling_less_zero
huffman@36979
   523
  ceiling_less_eq_one        ~> ceiling_less_one
huffman@36979
   524
  le_ceiling_eq_number_of    ~> number_of_le_ceiling
huffman@36979
   525
  le_ceiling_eq_zero         ~> zero_le_ceiling
huffman@36979
   526
  le_ceiling_eq_one          ~> one_le_ceiling
huffman@36979
   527
  ceiling_subtract_number_of ~> ceiling_diff_number_of
huffman@36979
   528
  ceiling_subtract_one       ~> ceiling_diff_one
huffman@36979
   529
wenzelm@37144
   530
* Theory "Finite_Set": various folding_XXX locales facilitate the
wenzelm@36857
   531
application of the various fold combinators on finite sets.
wenzelm@36857
   532
wenzelm@36857
   533
* Library theory "RBT" renamed to "RBT_Impl"; new library theory "RBT"
wenzelm@36857
   534
provides abstract red-black tree type which is backed by "RBT_Impl" as
wenzelm@36857
   535
implementation.  INCOMPATIBILTY.
haftmann@36147
   536
huffman@36830
   537
* Theory Library/Coinductive_List has been removed -- superseded by
wenzelm@35763
   538
AFP/thys/Coinductive.
wenzelm@35763
   539
huffman@36829
   540
* Theory PReal, including the type "preal" and related operations, has
huffman@36829
   541
been removed.  INCOMPATIBILITY.
huffman@36829
   542
wenzelm@37380
   543
* Real: new development using Cauchy Sequences.
wenzelm@37380
   544
wenzelm@37351
   545
* Split off theory "Big_Operators" containing setsum, setprod,
wenzelm@37351
   546
Inf_fin, Sup_fin, Min, Max from theory Finite_Set.  INCOMPATIBILITY.
wenzelm@36857
   547
wenzelm@36857
   548
* Theory "Rational" renamed to "Rat", for consistency with "Nat",
wenzelm@36857
   549
"Int" etc.  INCOMPATIBILITY.
wenzelm@36857
   550
wenzelm@37351
   551
* Constant Rat.normalize needs to be qualified.  INCOMPATIBILITY.
wenzelm@37143
   552
wenzelm@36857
   553
* New set of rules "ac_simps" provides combined assoc / commute
wenzelm@36857
   554
rewrites for all interpretations of the appropriate generic locales.
wenzelm@36857
   555
wenzelm@36857
   556
* Renamed theory "OrderedGroup" to "Groups" and split theory
wenzelm@36857
   557
"Ring_and_Field" into theories "Rings" and "Fields"; for more
wenzelm@36857
   558
appropriate and more consistent names suitable for name prefixes
wenzelm@36857
   559
within the HOL theories.  INCOMPATIBILITY.
haftmann@35050
   560
haftmann@35084
   561
* Some generic constants have been put to appropriate theories:
wenzelm@36857
   562
  - less_eq, less: Orderings
wenzelm@36857
   563
  - zero, one, plus, minus, uminus, times, abs, sgn: Groups
wenzelm@36857
   564
  - inverse, divide: Rings
haftmann@35084
   565
INCOMPATIBILITY.
haftmann@35084
   566
wenzelm@36857
   567
* More consistent naming of type classes involving orderings (and
wenzelm@36857
   568
lattices):
haftmann@35027
   569
haftmann@35027
   570
    lower_semilattice                   ~> semilattice_inf
haftmann@35027
   571
    upper_semilattice                   ~> semilattice_sup
haftmann@35027
   572
haftmann@35027
   573
    dense_linear_order                  ~> dense_linorder
haftmann@35027
   574
haftmann@35027
   575
    pordered_ab_group_add               ~> ordered_ab_group_add
haftmann@35027
   576
    pordered_ab_group_add_abs           ~> ordered_ab_group_add_abs
haftmann@35027
   577
    pordered_ab_semigroup_add           ~> ordered_ab_semigroup_add
haftmann@35027
   578
    pordered_ab_semigroup_add_imp_le    ~> ordered_ab_semigroup_add_imp_le
haftmann@35027
   579
    pordered_cancel_ab_semigroup_add    ~> ordered_cancel_ab_semigroup_add
haftmann@35027
   580
    pordered_cancel_comm_semiring       ~> ordered_cancel_comm_semiring
haftmann@35027
   581
    pordered_cancel_semiring            ~> ordered_cancel_semiring
haftmann@35027
   582
    pordered_comm_monoid_add            ~> ordered_comm_monoid_add
haftmann@35027
   583
    pordered_comm_ring                  ~> ordered_comm_ring
haftmann@35027
   584
    pordered_comm_semiring              ~> ordered_comm_semiring
haftmann@35027
   585
    pordered_ring                       ~> ordered_ring
haftmann@35027
   586
    pordered_ring_abs                   ~> ordered_ring_abs
haftmann@35027
   587
    pordered_semiring                   ~> ordered_semiring
haftmann@35027
   588
haftmann@35027
   589
    ordered_ab_group_add                ~> linordered_ab_group_add
haftmann@35027
   590
    ordered_ab_semigroup_add            ~> linordered_ab_semigroup_add
haftmann@35027
   591
    ordered_cancel_ab_semigroup_add     ~> linordered_cancel_ab_semigroup_add
haftmann@35027
   592
    ordered_comm_semiring_strict        ~> linordered_comm_semiring_strict
haftmann@35027
   593
    ordered_field                       ~> linordered_field
haftmann@35027
   594
    ordered_field_no_lb                 ~> linordered_field_no_lb
haftmann@35027
   595
    ordered_field_no_ub                 ~> linordered_field_no_ub
haftmann@35027
   596
    ordered_field_dense_linear_order    ~> dense_linordered_field
haftmann@35027
   597
    ordered_idom                        ~> linordered_idom
haftmann@35027
   598
    ordered_ring                        ~> linordered_ring
haftmann@35027
   599
    ordered_ring_le_cancel_factor       ~> linordered_ring_le_cancel_factor
haftmann@35027
   600
    ordered_ring_less_cancel_factor     ~> linordered_ring_less_cancel_factor
haftmann@35027
   601
    ordered_ring_strict                 ~> linordered_ring_strict
haftmann@35027
   602
    ordered_semidom                     ~> linordered_semidom
haftmann@35027
   603
    ordered_semiring                    ~> linordered_semiring
haftmann@35027
   604
    ordered_semiring_1                  ~> linordered_semiring_1
haftmann@35027
   605
    ordered_semiring_1_strict           ~> linordered_semiring_1_strict
haftmann@35027
   606
    ordered_semiring_strict             ~> linordered_semiring_strict
haftmann@35027
   607
wenzelm@36857
   608
  The following slightly odd type classes have been moved to a
wenzelm@37351
   609
  separate theory Library/Lattice_Algebras:
haftmann@35032
   610
haftmann@35032
   611
    lordered_ab_group_add               ~> lattice_ab_group_add
haftmann@35032
   612
    lordered_ab_group_add_abs           ~> lattice_ab_group_add_abs
haftmann@35032
   613
    lordered_ab_group_add_meet          ~> semilattice_inf_ab_group_add
haftmann@35032
   614
    lordered_ab_group_add_join          ~> semilattice_sup_ab_group_add
haftmann@35032
   615
    lordered_ring                       ~> lattice_ring
haftmann@35032
   616
haftmann@35027
   617
INCOMPATIBILITY.
haftmann@35027
   618
haftmann@36416
   619
* Refined field classes:
wenzelm@36857
   620
  - classes division_ring_inverse_zero, field_inverse_zero,
wenzelm@36857
   621
    linordered_field_inverse_zero include rule inverse 0 = 0 --
wenzelm@36857
   622
    subsumes former division_by_zero class;
wenzelm@36857
   623
  - numerous lemmas have been ported from field to division_ring.
wenzelm@36857
   624
INCOMPATIBILITY.
haftmann@36416
   625
haftmann@36416
   626
* Refined algebra theorem collections:
wenzelm@36857
   627
  - dropped theorem group group_simps, use algebra_simps instead;
wenzelm@36857
   628
  - dropped theorem group ring_simps, use field_simps instead;
wenzelm@36857
   629
  - proper theorem collection field_simps subsumes former theorem
wenzelm@36857
   630
    groups field_eq_simps and field_simps;
wenzelm@36857
   631
  - dropped lemma eq_minus_self_iff which is a duplicate for
wenzelm@36857
   632
    equal_neg_zero.
wenzelm@36857
   633
INCOMPATIBILITY.
wenzelm@35009
   634
wenzelm@35009
   635
* Theory Finite_Set and List: some lemmas have been generalized from
wenzelm@34076
   636
sets to lattices:
wenzelm@34076
   637
haftmann@34007
   638
  fun_left_comm_idem_inter      ~> fun_left_comm_idem_inf
haftmann@34007
   639
  fun_left_comm_idem_union      ~> fun_left_comm_idem_sup
haftmann@34007
   640
  inter_Inter_fold_inter        ~> inf_Inf_fold_inf
haftmann@34007
   641
  union_Union_fold_union        ~> sup_Sup_fold_sup
haftmann@34007
   642
  Inter_fold_inter              ~> Inf_fold_inf
haftmann@34007
   643
  Union_fold_union              ~> Sup_fold_sup
haftmann@34007
   644
  inter_INTER_fold_inter        ~> inf_INFI_fold_inf
haftmann@34007
   645
  union_UNION_fold_union        ~> sup_SUPR_fold_sup
haftmann@34007
   646
  INTER_fold_inter              ~> INFI_fold_inf
haftmann@34007
   647
  UNION_fold_union              ~> SUPR_fold_sup
haftmann@34007
   648
wenzelm@37351
   649
* Theory "Complete_Lattice": lemmas top_def and bot_def have been
haftmann@36416
   650
replaced by the more convenient lemmas Inf_empty and Sup_empty.
haftmann@36416
   651
Dropped lemmas Inf_insert_simp and Sup_insert_simp, which are subsumed
haftmann@36416
   652
by Inf_insert and Sup_insert.  Lemmas Inf_UNIV and Sup_UNIV replace
haftmann@36416
   653
former Inf_Univ and Sup_Univ.  Lemmas inf_top_right and sup_bot_right
haftmann@36416
   654
subsume inf_top and sup_bot respectively.  INCOMPATIBILITY.
haftmann@36416
   655
wenzelm@36857
   656
* Reorganized theory Multiset: swapped notation of pointwise and
wenzelm@36857
   657
multiset order:
wenzelm@37351
   658
wenzelm@36857
   659
  - pointwise ordering is instance of class order with standard syntax
wenzelm@36857
   660
    <= and <;
wenzelm@36857
   661
  - multiset ordering has syntax <=# and <#; partial order properties
wenzelm@36857
   662
    are provided by means of interpretation with prefix
wenzelm@36857
   663
    multiset_order;
wenzelm@36857
   664
  - less duplication, less historical organization of sections,
wenzelm@36857
   665
    conversion from associations lists to multisets, rudimentary code
wenzelm@36857
   666
    generation;
wenzelm@36857
   667
  - use insert_DiffM2 [symmetric] instead of elem_imp_eq_diff_union,
wenzelm@36857
   668
    if needed.
wenzelm@37351
   669
nipkow@36903
   670
Renamed:
wenzelm@37351
   671
wenzelm@37351
   672
  multiset_eq_conv_count_eq  ~>  multiset_ext_iff
wenzelm@37351
   673
  multi_count_ext  ~>  multiset_ext
wenzelm@37351
   674
  diff_union_inverse2  ~>  diff_union_cancelR
wenzelm@37351
   675
wenzelm@36857
   676
INCOMPATIBILITY.
haftmann@36416
   677
nipkow@36903
   678
* Theory Permutation: replaced local "remove" by List.remove1.
nipkow@36903
   679
haftmann@36416
   680
* Code generation: ML and OCaml code is decorated with signatures.
haftmann@36416
   681
wenzelm@35009
   682
* Theory List: added transpose.
wenzelm@35009
   683
huffman@35810
   684
* Library/Nat_Bijection.thy is a collection of bijective functions
huffman@35810
   685
between nat and other types, which supersedes the older libraries
huffman@35810
   686
Library/Nat_Int_Bij.thy and HOLCF/NatIso.thy.  INCOMPATIBILITY.
huffman@35810
   687
huffman@35810
   688
  Constants:
huffman@35810
   689
  Nat_Int_Bij.nat2_to_nat         ~> prod_encode
huffman@35810
   690
  Nat_Int_Bij.nat_to_nat2         ~> prod_decode
huffman@35810
   691
  Nat_Int_Bij.int_to_nat_bij      ~> int_encode
huffman@35810
   692
  Nat_Int_Bij.nat_to_int_bij      ~> int_decode
huffman@35810
   693
  Countable.pair_encode           ~> prod_encode
huffman@35810
   694
  NatIso.prod2nat                 ~> prod_encode
huffman@35810
   695
  NatIso.nat2prod                 ~> prod_decode
huffman@35810
   696
  NatIso.sum2nat                  ~> sum_encode
huffman@35810
   697
  NatIso.nat2sum                  ~> sum_decode
huffman@35810
   698
  NatIso.list2nat                 ~> list_encode
huffman@35810
   699
  NatIso.nat2list                 ~> list_decode
huffman@35810
   700
  NatIso.set2nat                  ~> set_encode
huffman@35810
   701
  NatIso.nat2set                  ~> set_decode
huffman@35810
   702
huffman@35810
   703
  Lemmas:
huffman@35810
   704
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_decode
huffman@35810
   705
  Nat_Int_Bij.nat2_to_nat_inj     ~> inj_prod_encode
huffman@35810
   706
  Nat_Int_Bij.nat2_to_nat_surj    ~> surj_prod_encode
huffman@35810
   707
  Nat_Int_Bij.nat_to_nat2_inj     ~> inj_prod_decode
huffman@35810
   708
  Nat_Int_Bij.nat_to_nat2_surj    ~> surj_prod_decode
huffman@35810
   709
  Nat_Int_Bij.i2n_n2i_id          ~> int_encode_inverse
huffman@35810
   710
  Nat_Int_Bij.n2i_i2n_id          ~> int_decode_inverse
huffman@35810
   711
  Nat_Int_Bij.surj_nat_to_int_bij ~> surj_int_encode
huffman@35810
   712
  Nat_Int_Bij.surj_int_to_nat_bij ~> surj_int_decode
huffman@35810
   713
  Nat_Int_Bij.inj_nat_to_int_bij  ~> inj_int_encode
huffman@35810
   714
  Nat_Int_Bij.inj_int_to_nat_bij  ~> inj_int_decode
huffman@35810
   715
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_encode
huffman@35810
   716
  Nat_Int_Bij.bij_int_to_nat_bij  ~> bij_int_decode
huffman@35810
   717
blanchet@36929
   718
* Sledgehammer:
blanchet@36929
   719
  - Renamed ATP commands:
blanchet@36929
   720
    atp_info     ~> sledgehammer running_atps
blanchet@36929
   721
    atp_kill     ~> sledgehammer kill_atps
blanchet@36929
   722
    atp_messages ~> sledgehammer messages
blanchet@36929
   723
    atp_minimize ~> sledgehammer minimize
blanchet@36929
   724
    print_atps   ~> sledgehammer available_atps
blanchet@36929
   725
    INCOMPATIBILITY.
blanchet@36929
   726
  - Added user's manual ("isabelle doc sledgehammer").
blanchet@36929
   727
  - Added option syntax and "sledgehammer_params" to customize
blanchet@36929
   728
    Sledgehammer's behavior.  See the manual for details.
blanchet@36929
   729
  - Modified the Isar proof reconstruction code so that it produces
blanchet@36929
   730
    direct proofs rather than proofs by contradiction.  (This feature
blanchet@36929
   731
    is still experimental.)
blanchet@36929
   732
  - Made Isar proof reconstruction work for SPASS, remote ATPs, and in
blanchet@36929
   733
    full-typed mode.
blanchet@36929
   734
  - Added support for TPTP syntax for SPASS via the "spass_tptp" ATP.
blanchet@36929
   735
blanchet@36928
   736
* Nitpick:
blanchet@36928
   737
  - Added and implemented "binary_ints" and "bits" options.
blanchet@36928
   738
  - Added "std" option and implemented support for nonstandard models.
blanchet@36928
   739
  - Added and implemented "finitize" option to improve the precision
blanchet@36928
   740
    of infinite datatypes based on a monotonicity analysis.
blanchet@36928
   741
  - Added support for quotient types.
blanchet@36928
   742
  - Added support for "specification" and "ax_specification"
blanchet@36928
   743
    constructs.
blanchet@36928
   744
  - Added support for local definitions (for "function" and
blanchet@36928
   745
    "termination" proofs).
blanchet@36928
   746
  - Added support for term postprocessors.
blanchet@36928
   747
  - Optimized "Multiset.multiset" and "FinFun.finfun".
blanchet@36928
   748
  - Improved efficiency of "destroy_constrs" optimization.
blanchet@36928
   749
  - Fixed soundness bugs related to "destroy_constrs" optimization and
blanchet@36928
   750
    record getters.
blanchet@37272
   751
  - Fixed soundness bug related to higher-order constructors.
blanchet@37272
   752
  - Fixed soundness bug when "full_descrs" is enabled.
blanchet@36928
   753
  - Improved precision of set constructs.
blanchet@37260
   754
  - Added "atoms" option.
blanchet@36928
   755
  - Added cache to speed up repeated Kodkod invocations on the same
blanchet@36928
   756
    problems.
blanchet@36928
   757
  - Renamed "MiniSatJNI", "zChaffJNI", "BerkMinAlloy", and
blanchet@36928
   758
    "SAT4JLight" to "MiniSat_JNI", "zChaff_JNI", "BerkMin_Alloy", and
blanchet@36928
   759
    "SAT4J_Light".  INCOMPATIBILITY.
blanchet@36928
   760
  - Removed "skolemize", "uncurry", "sym_break", "flatten_prop",
blanchet@36928
   761
    "sharing_depth", and "show_skolems" options.  INCOMPATIBILITY.
blanchet@37264
   762
  - Removed "nitpick_intro" attribute.  INCOMPATIBILITY.
blanchet@36928
   763
berghofe@37361
   764
* Method "induct" now takes instantiations of the form t, where t is not
berghofe@37361
   765
  a variable, as a shorthand for "x == t", where x is a fresh variable.
berghofe@37361
   766
  If this is not intended, t has to be enclosed in parentheses.
berghofe@37361
   767
  By default, the equalities generated by definitional instantiations
berghofe@37361
   768
  are pre-simplified, which may cause parameters of inductive cases
berghofe@37361
   769
  to disappear, or may even delete some of the inductive cases.
berghofe@37361
   770
  Use "induct (no_simp)" instead of "induct" to restore the old
berghofe@37361
   771
  behaviour. The (no_simp) option is also understood by the "cases"
berghofe@37361
   772
  and "nominal_induct" methods, which now perform pre-simplification, too.
berghofe@37361
   773
  INCOMPATIBILITY.
berghofe@37361
   774
haftmann@33993
   775
huffman@36828
   776
*** HOLCF ***
huffman@36828
   777
huffman@36828
   778
* Variable names in lemmas generated by the domain package have
huffman@36828
   779
changed; the naming scheme is now consistent with the HOL datatype
huffman@36828
   780
package.  Some proof scripts may be affected, INCOMPATIBILITY.
huffman@36828
   781
huffman@36828
   782
* The domain package no longer defines the function "foo_copy" for
huffman@36828
   783
recursive domain "foo".  The reach lemma is now stated directly in
huffman@36828
   784
terms of "foo_take".  Lemmas and proofs that mention "foo_copy" must
huffman@36828
   785
be reformulated in terms of "foo_take", INCOMPATIBILITY.
huffman@36828
   786
huffman@36828
   787
* Most definedness lemmas generated by the domain package (previously
huffman@36828
   788
of the form "x ~= UU ==> foo$x ~= UU") now have an if-and-only-if form
huffman@36828
   789
like "foo$x = UU <-> x = UU", which works better as a simp rule.
wenzelm@37351
   790
Proofs that used definedness lemmas as intro rules may break,
huffman@36828
   791
potential INCOMPATIBILITY.
huffman@36828
   792
huffman@36828
   793
* Induction and casedist rules generated by the domain package now
huffman@36828
   794
declare proper case_names (one called "bottom", and one named for each
huffman@36828
   795
constructor).  INCOMPATIBILITY.
huffman@36828
   796
huffman@36828
   797
* For mutually-recursive domains, separate "reach" and "take_lemma"
huffman@36828
   798
rules are generated for each domain, INCOMPATIBILITY.
huffman@36828
   799
huffman@36828
   800
  foo_bar.reach       ~> foo.reach  bar.reach
huffman@36828
   801
  foo_bar.take_lemmas ~> foo.take_lemma  bar.take_lemma
huffman@36828
   802
huffman@36828
   803
* Some lemmas generated by the domain package have been renamed for
huffman@36828
   804
consistency with the datatype package, INCOMPATIBILITY.
huffman@36828
   805
huffman@36828
   806
  foo.ind        ~> foo.induct
huffman@36828
   807
  foo.finite_ind ~> foo.finite_induct
huffman@36828
   808
  foo.coind      ~> foo.coinduct
huffman@36828
   809
  foo.casedist   ~> foo.exhaust
huffman@36828
   810
  foo.exhaust    ~> foo.nchotomy
huffman@36828
   811
huffman@36828
   812
* For consistency with other definition packages, the fixrec package
huffman@36828
   813
now generates qualified theorem names, INCOMPATIBILITY.
huffman@36828
   814
huffman@36828
   815
  foo_simps  ~> foo.simps
huffman@36828
   816
  foo_unfold ~> foo.unfold
huffman@36828
   817
  foo_induct ~> foo.induct
huffman@36828
   818
huffman@37087
   819
* The "fixrec_simp" attribute has been removed.  The "fixrec_simp"
huffman@37087
   820
method and internal fixrec proofs now use the default simpset instead.
huffman@37087
   821
INCOMPATIBILITY.
huffman@37087
   822
huffman@36828
   823
* The "contlub" predicate has been removed.  Proof scripts should use
huffman@36828
   824
lemma contI2 in place of monocontlub2cont, INCOMPATIBILITY.
huffman@36828
   825
huffman@36828
   826
* The "admw" predicate has been removed, INCOMPATIBILITY.
huffman@36828
   827
huffman@36828
   828
* The constants cpair, cfst, and csnd have been removed in favor of
huffman@36828
   829
Pair, fst, and snd from Isabelle/HOL, INCOMPATIBILITY.
huffman@36828
   830
huffman@36828
   831
haftmann@33993
   832
*** ML ***
haftmann@33993
   833
wenzelm@37351
   834
* Antiquotations for basic formal entities:
wenzelm@37351
   835
wenzelm@37351
   836
    @{class NAME}         -- type class
wenzelm@37351
   837
    @{class_syntax NAME}  -- syntax representation of the above
wenzelm@37351
   838
wenzelm@37351
   839
    @{type_name NAME}     -- logical type
wenzelm@37351
   840
    @{type_abbrev NAME}   -- type abbreviation
wenzelm@37351
   841
    @{nonterminal NAME}   -- type of concrete syntactic category
wenzelm@37351
   842
    @{type_syntax NAME}   -- syntax representation of any of the above
wenzelm@37351
   843
wenzelm@37351
   844
    @{const_name NAME}    -- logical constant (INCOMPATIBILITY)
wenzelm@37351
   845
    @{const_abbrev NAME}  -- abbreviated constant
wenzelm@37351
   846
    @{const_syntax NAME}  -- syntax representation of any of the above
wenzelm@37351
   847
wenzelm@37351
   848
* Antiquotation @{syntax_const NAME} ensures that NAME refers to a raw
wenzelm@37351
   849
syntax constant (cf. 'syntax' command).
wenzelm@37351
   850
wenzelm@37351
   851
* Antiquotation @{make_string} inlines a function to print arbitrary
wenzelm@37351
   852
values similar to the ML toplevel.  The result is compiler dependent
wenzelm@37351
   853
and may fall back on "?" in certain situations.
wenzelm@37351
   854
wenzelm@37351
   855
* Diagnostic commands 'ML_val' and 'ML_command' may refer to
wenzelm@37351
   856
antiquotations @{Isar.state} and @{Isar.goal}.  This replaces impure
wenzelm@37351
   857
Isar.state() and Isar.goal(), which belong to the old TTY loop and do
wenzelm@37351
   858
not work with the asynchronous Isar document model.
wenzelm@37351
   859
wenzelm@37351
   860
* Configuration options now admit dynamic default values, depending on
wenzelm@37351
   861
the context or even global references.
wenzelm@37351
   862
wenzelm@37351
   863
* SHA1.digest digests strings according to SHA-1 (see RFC 3174).  It
wenzelm@37351
   864
uses an efficient external library if available (for Poly/ML).
wenzelm@37351
   865
wenzelm@37144
   866
* Renamed some important ML structures, while keeping the old names
wenzelm@37144
   867
for some time as aliases within the structure Legacy:
wenzelm@37144
   868
wenzelm@37144
   869
  OuterKeyword  ~>  Keyword
wenzelm@37144
   870
  OuterLex      ~>  Token
wenzelm@37144
   871
  OuterParse    ~>  Parse
wenzelm@37144
   872
  OuterSyntax   ~>  Outer_Syntax
wenzelm@37216
   873
  PrintMode     ~>  Print_Mode
wenzelm@37144
   874
  SpecParse     ~>  Parse_Spec
wenzelm@37216
   875
  ThyInfo       ~>  Thy_Info
wenzelm@37216
   876
  ThyLoad       ~>  Thy_Load
wenzelm@37216
   877
  ThyOutput     ~>  Thy_Output
wenzelm@37145
   878
  TypeInfer     ~>  Type_Infer
wenzelm@37144
   879
wenzelm@37144
   880
Note that "open Legacy" simplifies porting of sources, but forgetting
wenzelm@37144
   881
to remove it again will complicate porting again in the future.
wenzelm@37144
   882
wenzelm@37144
   883
* Most operations that refer to a global context are named
wenzelm@37144
   884
accordingly, e.g. Simplifier.global_context or
wenzelm@37144
   885
ProofContext.init_global.  There are some situations where a global
wenzelm@37144
   886
context actually works, but under normal circumstances one needs to
wenzelm@37144
   887
pass the proper local context through the code!
wenzelm@37144
   888
wenzelm@37144
   889
* Discontinued old TheoryDataFun with its copy/init operation -- data
wenzelm@37144
   890
needs to be pure.  Functor Theory_Data_PP retains the traditional
wenzelm@37144
   891
Pretty.pp argument to merge, which is absent in the standard
wenzelm@37144
   892
Theory_Data version.
wenzelm@36429
   893
wenzelm@37144
   894
* Sorts.certify_sort and derived "cert" operations for types and terms
wenzelm@37144
   895
no longer minimize sorts.  Thus certification at the boundary of the
wenzelm@37144
   896
inference kernel becomes invariant under addition of class relations,
wenzelm@37144
   897
which is an important monotonicity principle.  Sorts are now minimized
wenzelm@37144
   898
in the syntax layer only, at the boundary between the end-user and the
wenzelm@37144
   899
system.  Subtle INCOMPATIBILITY, may have to use Sign.minimize_sort
wenzelm@37144
   900
explicitly in rare situations.
wenzelm@37144
   901
wenzelm@35021
   902
* Renamed old-style Drule.standard to Drule.export_without_context, to
wenzelm@35021
   903
emphasize that this is in no way a standard operation.
wenzelm@35021
   904
INCOMPATIBILITY.
wenzelm@35021
   905
wenzelm@34076
   906
* Subgoal.FOCUS (and variants): resulting goal state is normalized as
wenzelm@34076
   907
usual for resolution.  Rare INCOMPATIBILITY.
wenzelm@34076
   908
wenzelm@35845
   909
* Renamed varify/unvarify operations to varify_global/unvarify_global
wenzelm@35845
   910
to emphasize that these only work in a global situation (which is
wenzelm@35845
   911
quite rare).
wenzelm@35845
   912
wenzelm@37144
   913
* Curried take and drop in library.ML; negative length is interpreted
wenzelm@37144
   914
as infinity (as in chop).  Subtle INCOMPATIBILITY.
wenzelm@36961
   915
wenzelm@37351
   916
* Proof terms: type substitutions on proof constants now use canonical
wenzelm@37351
   917
order of type variables.  INCOMPATIBILITY for tools working with proof
wenzelm@37351
   918
terms.
wenzelm@37351
   919
wenzelm@37351
   920
* Raw axioms/defs may no longer carry sort constraints, and raw defs
wenzelm@37351
   921
may no longer carry premises.  User-level specifications are
wenzelm@37351
   922
transformed accordingly by Thm.add_axiom/add_def.
wenzelm@37351
   923
haftmann@33993
   924
wenzelm@34238
   925
*** System ***
wenzelm@34238
   926
wenzelm@34238
   927
* Discontinued special HOL_USEDIR_OPTIONS for the main HOL image;
wenzelm@34238
   928
ISABELLE_USEDIR_OPTIONS applies uniformly to all sessions.  Note that
wenzelm@34238
   929
proof terms are enabled unconditionally in the new HOL-Proofs image.
wenzelm@34238
   930
wenzelm@34255
   931
* Discontinued old ISABELLE and ISATOOL environment settings (legacy
wenzelm@34255
   932
feature since Isabelle2009).  Use ISABELLE_PROCESS and ISABELLE_TOOL,
wenzelm@34255
   933
respectively.
wenzelm@34255
   934
wenzelm@36201
   935
* Old lib/scripts/polyml-platform is superseded by the
wenzelm@36201
   936
ISABELLE_PLATFORM setting variable, which defaults to the 32 bit
wenzelm@36201
   937
variant, even on a 64 bit machine.  The following example setting
wenzelm@36201
   938
prefers 64 bit if available:
wenzelm@36201
   939
wenzelm@36201
   940
  ML_PLATFORM="${ISABELLE_PLATFORM64:-$ISABELLE_PLATFORM}"
wenzelm@36201
   941
wenzelm@37218
   942
* The preliminary Isabelle/jEdit application demonstrates the emerging
wenzelm@37218
   943
Isabelle/Scala layer for advanced prover interaction and integration.
wenzelm@37218
   944
See src/Tools/jEdit or "isabelle jedit" provided by the properly built
wenzelm@37218
   945
component.
wenzelm@37218
   946
wenzelm@37375
   947
* "IsabelleText" is a Unicode font derived from Bitstream Vera Mono
wenzelm@37375
   948
and Bluesky TeX fonts.  It provides the usual Isabelle symbols,
wenzelm@37375
   949
similar to the default assignment of the document preparation system
wenzelm@37375
   950
(cf. isabellesym.sty).  The Isabelle/Scala class Isabelle_System
wenzelm@37375
   951
provides some operations for direct access to the font without asking
wenzelm@37375
   952
the user for manual installation.
wenzelm@37375
   953
wenzelm@34238
   954
haftmann@33993
   955
wenzelm@33842
   956
New in Isabelle2009-1 (December 2009)
wenzelm@33842
   957
-------------------------------------
wenzelm@30904
   958
wenzelm@31547
   959
*** General ***
wenzelm@31547
   960
wenzelm@31547
   961
* Discontinued old form of "escaped symbols" such as \\<forall>.  Only
wenzelm@31547
   962
one backslash should be used, even in ML sources.
wenzelm@31547
   963
wenzelm@31547
   964
haftmann@30951
   965
*** Pure ***
haftmann@30951
   966
ballarin@32846
   967
* Locale interpretation propagates mixins along the locale hierarchy.
ballarin@32846
   968
The currently only available mixins are the equations used to map
ballarin@32846
   969
local definitions to terms of the target domain of an interpretation.
ballarin@32846
   970
wenzelm@33842
   971
* Reactivated diagnostic command 'print_interps'.  Use "print_interps
wenzelm@33842
   972
loc" to print all interpretations of locale "loc" in the theory.
wenzelm@33842
   973
Interpretations in proofs are not shown.
ballarin@32846
   974
ballarin@32983
   975
* Thoroughly revised locales tutorial.  New section on conditional
ballarin@32983
   976
interpretation.
ballarin@32983
   977
wenzelm@33843
   978
* On instantiation of classes, remaining undefined class parameters
wenzelm@33843
   979
are formally declared.  INCOMPATIBILITY.
wenzelm@33843
   980
haftmann@30951
   981
wenzelm@33842
   982
*** Document preparation ***
wenzelm@33842
   983
wenzelm@33842
   984
* New generalized style concept for printing terms: @{foo (style) ...}
wenzelm@33842
   985
instead of @{foo_style style ...}  (old form is still retained for
wenzelm@33842
   986
backward compatibility).  Styles can be also applied for
wenzelm@33842
   987
antiquotations prop, term_type and typeof.
haftmann@32891
   988
haftmann@32891
   989
haftmann@30930
   990
*** HOL ***
haftmann@30930
   991
wenzelm@33842
   992
* New proof method "smt" for a combination of first-order logic with
wenzelm@33842
   993
equality, linear and nonlinear (natural/integer/real) arithmetic, and
wenzelm@33842
   994
fixed-size bitvectors; there is also basic support for higher-order
wenzelm@33842
   995
features (esp. lambda abstractions).  It is an incomplete decision
wenzelm@33842
   996
procedure based on external SMT solvers using the oracle mechanism;
wenzelm@33842
   997
for the SMT solver Z3, this method is proof-producing.  Certificates
wenzelm@33842
   998
are provided to avoid calling the external solvers solely for
wenzelm@33842
   999
re-checking proofs.  Due to a remote SMT service there is no need for
wenzelm@33842
  1000
installing SMT solvers locally.  See src/HOL/SMT.
wenzelm@33842
  1001
wenzelm@33842
  1002
* New commands to load and prove verification conditions generated by
wenzelm@33842
  1003
the Boogie program verifier or derived systems (e.g. the Verifying C
wenzelm@33842
  1004
Compiler (VCC) or Spec#).  See src/HOL/Boogie.
wenzelm@33842
  1005
wenzelm@33842
  1006
* New counterexample generator tool 'nitpick' based on the Kodkod
wenzelm@33842
  1007
relational model finder.  See src/HOL/Tools/Nitpick and
wenzelm@33842
  1008
src/HOL/Nitpick_Examples.
wenzelm@33842
  1009
haftmann@33860
  1010
* New commands 'code_pred' and 'values' to invoke the predicate
haftmann@33860
  1011
compiler and to enumerate values of inductive predicates.
haftmann@33860
  1012
haftmann@33860
  1013
* A tabled implementation of the reflexive transitive closure.
haftmann@33860
  1014
haftmann@33860
  1015
* New implementation of quickcheck uses generic code generator;
haftmann@33860
  1016
default generators are provided for all suitable HOL types, records
haftmann@33860
  1017
and datatypes.  Old quickcheck can be re-activated importing theory
haftmann@33860
  1018
Library/SML_Quickcheck.
haftmann@33860
  1019
wenzelm@33843
  1020
* New testing tool Mirabelle for automated proof tools.  Applies
wenzelm@33843
  1021
several tools and tactics like sledgehammer, metis, or quickcheck, to
wenzelm@33843
  1022
every proof step in a theory.  To be used in batch mode via the
wenzelm@33843
  1023
"mirabelle" utility.
wenzelm@33843
  1024
wenzelm@33843
  1025
* New proof method "sos" (sum of squares) for nonlinear real
wenzelm@33843
  1026
arithmetic (originally due to John Harison). It requires theory
wenzelm@33843
  1027
Library/Sum_Of_Squares.  It is not a complete decision procedure but
wenzelm@33843
  1028
works well in practice on quantifier-free real arithmetic with +, -,
wenzelm@33843
  1029
*, ^, =, <= and <, i.e. boolean combinations of equalities and
wenzelm@33843
  1030
inequalities between polynomials.  It makes use of external
wenzelm@33843
  1031
semidefinite programming solvers.  Method "sos" generates a
wenzelm@33843
  1032
certificate that can be pasted into the proof thus avoiding the need
wenzelm@33843
  1033
to call an external tool every time the proof is checked.  See
wenzelm@33843
  1034
src/HOL/Library/Sum_Of_Squares.
wenzelm@33843
  1035
wenzelm@33843
  1036
* New method "linarith" invokes existing linear arithmetic decision
wenzelm@33843
  1037
procedure only.
wenzelm@33843
  1038
wenzelm@33843
  1039
* New command 'atp_minimal' reduces result produced by Sledgehammer.
wenzelm@33843
  1040
wenzelm@33843
  1041
* New Sledgehammer option "Full Types" in Proof General settings menu.
wenzelm@33843
  1042
Causes full type information to be output to the ATPs.  This slows
wenzelm@33843
  1043
ATPs down considerably but eliminates a source of unsound "proofs"
wenzelm@33843
  1044
that fail later.
wenzelm@33843
  1045
wenzelm@33843
  1046
* New method "metisFT": A version of metis that uses full type
wenzelm@33843
  1047
information in order to avoid failures of proof reconstruction.
wenzelm@33843
  1048
wenzelm@33843
  1049
* New evaluator "approximate" approximates an real valued term using
wenzelm@33843
  1050
the same method as the approximation method.
wenzelm@33843
  1051
wenzelm@33843
  1052
* Method "approximate" now supports arithmetic expressions as
wenzelm@33843
  1053
boundaries of intervals and implements interval splitting and Taylor
wenzelm@33843
  1054
series expansion.
wenzelm@33843
  1055
wenzelm@33843
  1056
* ML antiquotation @{code_datatype} inserts definition of a datatype
wenzelm@33843
  1057
generated by the code generator; e.g. see src/HOL/Predicate.thy.
wenzelm@33843
  1058
haftmann@33860
  1059
* New theory SupInf of the supremum and infimum operators for sets of
haftmann@33860
  1060
reals.
haftmann@33860
  1061
haftmann@33860
  1062
* New theory Probability, which contains a development of measure
haftmann@33860
  1063
theory, eventually leading to Lebesgue integration and probability.
haftmann@33860
  1064
haftmann@33860
  1065
* Extended Multivariate Analysis to include derivation and Brouwer's
haftmann@33860
  1066
fixpoint theorem.
wenzelm@33843
  1067
wenzelm@33842
  1068
* Reorganization of number theory, INCOMPATIBILITY:
wenzelm@33873
  1069
  - new number theory development for nat and int, in theories Divides
wenzelm@33873
  1070
    and GCD as well as in new session Number_Theory
wenzelm@33873
  1071
  - some constants and facts now suffixed with _nat and _int
wenzelm@33873
  1072
    accordingly
wenzelm@33873
  1073
  - former session NumberTheory now named Old_Number_Theory, including
wenzelm@33873
  1074
    theories Legacy_GCD and Primes (prefer Number_Theory if possible)
wenzelm@33842
  1075
  - moved theory Pocklington from src/HOL/Library to
wenzelm@33842
  1076
    src/HOL/Old_Number_Theory
haftmann@32479
  1077
wenzelm@33873
  1078
* Theory GCD includes functions Gcd/GCD and Lcm/LCM for the gcd and
wenzelm@33873
  1079
lcm of finite and infinite sets. It is shown that they form a complete
haftmann@32600
  1080
lattice.
haftmann@32600
  1081
haftmann@32600
  1082
* Class semiring_div requires superclass no_zero_divisors and proof of
haftmann@32600
  1083
div_mult_mult1; theorems div_mult_mult1, div_mult_mult2,
haftmann@32600
  1084
div_mult_mult1_if, div_mult_mult1 and div_mult_mult2 have been
haftmann@32600
  1085
generalized to class semiring_div, subsuming former theorems
haftmann@32600
  1086
zdiv_zmult_zmult1, zdiv_zmult_zmult1_if, zdiv_zmult_zmult1 and
haftmann@32600
  1087
zdiv_zmult_zmult2.  div_mult_mult1 is now [simp] by default.
haftmann@32600
  1088
INCOMPATIBILITY.
haftmann@32600
  1089
haftmann@32588
  1090
* Refinements to lattice classes and sets:
haftmann@32064
  1091
  - less default intro/elim rules in locale variant, more default
haftmann@32064
  1092
    intro/elim rules in class variant: more uniformity
wenzelm@33842
  1093
  - lemma ge_sup_conv renamed to le_sup_iff, in accordance with
wenzelm@33842
  1094
    le_inf_iff
wenzelm@33842
  1095
  - dropped lemma alias inf_ACI for inf_aci (same for sup_ACI and
wenzelm@33842
  1096
    sup_aci)
haftmann@32064
  1097
  - renamed ACI to inf_sup_aci
haftmann@32600
  1098
  - new class "boolean_algebra"
wenzelm@33842
  1099
  - class "complete_lattice" moved to separate theory
haftmann@33860
  1100
    "Complete_Lattice"; corresponding constants (and abbreviations)
wenzelm@33842
  1101
    renamed and with authentic syntax:
haftmann@33860
  1102
    Set.Inf ~>    Complete_Lattice.Inf
haftmann@33860
  1103
    Set.Sup ~>    Complete_Lattice.Sup
haftmann@33860
  1104
    Set.INFI ~>   Complete_Lattice.INFI
haftmann@33860
  1105
    Set.SUPR ~>   Complete_Lattice.SUPR
haftmann@33860
  1106
    Set.Inter ~>  Complete_Lattice.Inter
haftmann@33860
  1107
    Set.Union ~>  Complete_Lattice.Union
haftmann@33860
  1108
    Set.INTER ~>  Complete_Lattice.INTER
haftmann@33860
  1109
    Set.UNION ~>  Complete_Lattice.UNION
haftmann@32600
  1110
  - authentic syntax for
haftmann@32600
  1111
    Set.Pow
haftmann@32600
  1112
    Set.image
haftmann@32588
  1113
  - mere abbreviations:
haftmann@32588
  1114
    Set.empty               (for bot)
haftmann@32588
  1115
    Set.UNIV                (for top)
haftmann@33860
  1116
    Set.inter               (for inf, formerly Set.Int)
haftmann@33860
  1117
    Set.union               (for sup, formerly Set.Un)
haftmann@32588
  1118
    Complete_Lattice.Inter  (for Inf)
haftmann@32588
  1119
    Complete_Lattice.Union  (for Sup)
haftmann@32606
  1120
    Complete_Lattice.INTER  (for INFI)
haftmann@32606
  1121
    Complete_Lattice.UNION  (for SUPR)
haftmann@32600
  1122
  - object-logic definitions as far as appropriate
haftmann@32217
  1123
haftmann@32691
  1124
INCOMPATIBILITY.  Care is required when theorems Int_subset_iff or
wenzelm@33842
  1125
Un_subset_iff are explicitly deleted as default simp rules; then also
wenzelm@33842
  1126
their lattice counterparts le_inf_iff and le_sup_iff have to be
haftmann@32691
  1127
deleted to achieve the desired effect.
haftmann@32064
  1128
wenzelm@33842
  1129
* Rules inf_absorb1, inf_absorb2, sup_absorb1, sup_absorb2 are no simp
wenzelm@33842
  1130
rules by default any longer; the same applies to min_max.inf_absorb1
wenzelm@33842
  1131
etc.  INCOMPATIBILITY.
wenzelm@33842
  1132
wenzelm@33842
  1133
* Rules sup_Int_eq and sup_Un_eq are no longer declared as
wenzelm@33842
  1134
pred_set_conv by default.  INCOMPATIBILITY.
wenzelm@33842
  1135
wenzelm@33842
  1136
* Power operations on relations and functions are now one dedicated
haftmann@32706
  1137
constant "compow" with infix syntax "^^".  Power operation on
wenzelm@31547
  1138
multiplicative monoids retains syntax "^" and is now defined generic
wenzelm@31547
  1139
in class power.  INCOMPATIBILITY.
wenzelm@31547
  1140
wenzelm@33842
  1141
* Relation composition "R O S" now has a more standard argument order:
wenzelm@33842
  1142
"R O S = {(x, z). EX y. (x, y) : R & (y, z) : S}".  INCOMPATIBILITY,
wenzelm@33842
  1143
rewrite propositions with "S O R" --> "R O S". Proofs may occasionally
wenzelm@33842
  1144
break, since the O_assoc rule was not rewritten like this.  Fix using
wenzelm@33842
  1145
O_assoc[symmetric].  The same applies to the curried version "R OO S".
wenzelm@32427
  1146
nipkow@33057
  1147
* Function "Inv" is renamed to "inv_into" and function "inv" is now an
wenzelm@33842
  1148
abbreviation for "inv_into UNIV".  Lemmas are renamed accordingly.
nipkow@32988
  1149
INCOMPATIBILITY.
nipkow@32988
  1150
haftmann@33860
  1151
* Most rules produced by inductive and datatype package have mandatory
haftmann@33860
  1152
prefixes.  INCOMPATIBILITY.
nipkow@31790
  1153
wenzelm@33842
  1154
* Changed "DERIV_intros" to a dynamic fact, which can be augmented by
wenzelm@33842
  1155
the attribute of the same name.  Each of the theorems in the list
wenzelm@33842
  1156
DERIV_intros assumes composition with an additional function and
wenzelm@33842
  1157
matches a variable to the derivative, which has to be solved by the
wenzelm@33842
  1158
Simplifier.  Hence (auto intro!: DERIV_intros) computes the derivative
wenzelm@33873
  1159
of most elementary terms.  Former Maclauren.DERIV_tac and
wenzelm@33873
  1160
Maclauren.deriv_tac should be replaced by (auto intro!: DERIV_intros).
wenzelm@33873
  1161
INCOMPATIBILITY.
haftmann@33860
  1162
haftmann@33860
  1163
* Code generator attributes follow the usual underscore convention:
haftmann@33860
  1164
    code_unfold     replaces    code unfold
haftmann@33860
  1165
    code_post       replaces    code post
haftmann@33860
  1166
    etc.
haftmann@33860
  1167
  INCOMPATIBILITY.
wenzelm@31900
  1168
krauss@33471
  1169
* Renamed methods:
krauss@33471
  1170
    sizechange -> size_change
krauss@33471
  1171
    induct_scheme -> induction_schema
haftmann@33860
  1172
  INCOMPATIBILITY.
nipkow@33673
  1173
wenzelm@33843
  1174
* Discontinued abbreviation "arbitrary" of constant "undefined".
wenzelm@33843
  1175
INCOMPATIBILITY, use "undefined" directly.
wenzelm@33843
  1176
haftmann@33860
  1177
* Renamed theorems:
haftmann@33860
  1178
    Suc_eq_add_numeral_1 -> Suc_eq_plus1
haftmann@33860
  1179
    Suc_eq_add_numeral_1_left -> Suc_eq_plus1_left
haftmann@33860
  1180
    Suc_plus1 -> Suc_eq_plus1
haftmann@33860
  1181
    *anti_sym -> *antisym*
haftmann@33860
  1182
    vector_less_eq_def -> vector_le_def
haftmann@33860
  1183
  INCOMPATIBILITY.
haftmann@33860
  1184
haftmann@33860
  1185
* Added theorem List.map_map as [simp].  Removed List.map_compose.
haftmann@33860
  1186
INCOMPATIBILITY.
haftmann@33860
  1187
haftmann@33860
  1188
* Removed predicate "M hassize n" (<--> card M = n & finite M).
haftmann@33860
  1189
INCOMPATIBILITY.
haftmann@33860
  1190
hoelzl@31812
  1191
huffman@33825
  1192
*** HOLCF ***
huffman@33825
  1193
wenzelm@33842
  1194
* Theory Representable defines a class "rep" of domains that are
wenzelm@33842
  1195
representable (via an ep-pair) in the universal domain type "udom".
huffman@33825
  1196
Instances are provided for all type constructors defined in HOLCF.
huffman@33825
  1197
huffman@33825
  1198
* The 'new_domain' command is a purely definitional version of the
huffman@33825
  1199
domain package, for representable domains.  Syntax is identical to the
huffman@33825
  1200
old domain package.  The 'new_domain' package also supports indirect
huffman@33825
  1201
recursion using previously-defined type constructors.  See
wenzelm@33842
  1202
src/HOLCF/ex/New_Domain.thy for examples.
wenzelm@33842
  1203
wenzelm@33842
  1204
* Method "fixrec_simp" unfolds one step of a fixrec-defined constant
huffman@33825
  1205
on the left-hand side of an equation, and then performs
huffman@33825
  1206
simplification.  Rewriting is done using rules declared with the
wenzelm@33842
  1207
"fixrec_simp" attribute.  The "fixrec_simp" method is intended as a
wenzelm@33842
  1208
replacement for "fixpat"; see src/HOLCF/ex/Fixrec_ex.thy for examples.
huffman@33825
  1209
huffman@33825
  1210
* The pattern-match compiler in 'fixrec' can now handle constructors
huffman@33825
  1211
with HOL function types.  Pattern-match combinators for the Pair
huffman@33825
  1212
constructor are pre-configured.
huffman@33825
  1213
huffman@33825
  1214
* The 'fixrec' package now produces better fixed-point induction rules
huffman@33825
  1215
for mutually-recursive definitions:  Induction rules have conclusions
huffman@33825
  1216
of the form "P foo bar" instead of "P <foo, bar>".
huffman@33825
  1217
huffman@33825
  1218
* The constant "sq_le" (with infix syntax "<<" or "\<sqsubseteq>") has
huffman@33825
  1219
been renamed to "below".  The name "below" now replaces "less" in many
wenzelm@33842
  1220
theorem names.  (Legacy theorem names using "less" are still supported
wenzelm@33842
  1221
as well.)
huffman@33825
  1222
huffman@33825
  1223
* The 'fixrec' package now supports "bottom patterns".  Bottom
huffman@33825
  1224
patterns can be used to generate strictness rules, or to make
huffman@33825
  1225
functions more strict (much like the bang-patterns supported by the
wenzelm@33873
  1226
Glasgow Haskell Compiler).  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@33873
  1227
examples.
huffman@33825
  1228
huffman@33825
  1229
wenzelm@31304
  1230
*** ML ***
wenzelm@31304
  1231
wenzelm@33843
  1232
* Support for Poly/ML 5.3.0, with improved reporting of compiler
wenzelm@33843
  1233
errors and run-time exceptions, including detailed source positions.
wenzelm@33843
  1234
wenzelm@33843
  1235
* Structure Name_Space (formerly NameSpace) now manages uniquely
wenzelm@33843
  1236
identified entries, with some additional information such as source
wenzelm@33843
  1237
position, logical grouping etc.
wenzelm@33843
  1238
wenzelm@33524
  1239
* Theory and context data is now introduced by the simplified and
wenzelm@33524
  1240
modernized functors Theory_Data, Proof_Data, Generic_Data.  Data needs
wenzelm@33524
  1241
to be pure, but the old TheoryDataFun for mutable data (with explicit
wenzelm@33524
  1242
copy operation) is still available for some time.
wenzelm@33524
  1243
wenzelm@32742
  1244
* Structure Synchronized (cf. src/Pure/Concurrent/synchronized.ML)
wenzelm@32742
  1245
provides a high-level programming interface to synchronized state
wenzelm@32742
  1246
variables with atomic update.  This works via pure function
wenzelm@32742
  1247
application within a critical section -- its runtime should be as
wenzelm@32742
  1248
short as possible; beware of deadlocks if critical code is nested,
wenzelm@32742
  1249
either directly or indirectly via other synchronized variables!
wenzelm@32742
  1250
wenzelm@32742
  1251
* Structure Unsynchronized (cf. src/Pure/ML-Systems/unsynchronized.ML)
wenzelm@32742
  1252
wraps raw ML references, explicitly indicating their non-thread-safe
wenzelm@32742
  1253
behaviour.  The Isar toplevel keeps this structure open, to
wenzelm@32742
  1254
accommodate Proof General as well as quick and dirty interactive
wenzelm@32742
  1255
experiments with references.
wenzelm@32742
  1256
wenzelm@32365
  1257
* PARALLEL_CHOICE and PARALLEL_GOALS provide basic support for
wenzelm@32365
  1258
parallel tactical reasoning.
wenzelm@32365
  1259
wenzelm@32427
  1260
* Tacticals Subgoal.FOCUS, Subgoal.FOCUS_PREMS, Subgoal.FOCUS_PARAMS
wenzelm@32427
  1261
are similar to SUBPROOF, but are slightly more flexible: only the
wenzelm@32427
  1262
specified parts of the subgoal are imported into the context, and the
wenzelm@32427
  1263
body tactic may introduce new subgoals and schematic variables.
wenzelm@32427
  1264
wenzelm@32427
  1265
* Old tactical METAHYPS, which does not observe the proof context, has
wenzelm@32427
  1266
been renamed to Old_Goals.METAHYPS and awaits deletion.  Use SUBPROOF
wenzelm@32427
  1267
or Subgoal.FOCUS etc.
wenzelm@32216
  1268
wenzelm@31971
  1269
* Renamed functor TableFun to Table, and GraphFun to Graph.  (Since
wenzelm@31971
  1270
functors have their own ML name space there is no point to mark them
wenzelm@31971
  1271
separately.)  Minor INCOMPATIBILITY.
wenzelm@31971
  1272
wenzelm@31901
  1273
* Renamed NamedThmsFun to Named_Thms.  INCOMPATIBILITY.
wenzelm@31901
  1274
wenzelm@33842
  1275
* Renamed several structures FooBar to Foo_Bar.  Occasional,
wenzelm@33842
  1276
INCOMPATIBILITY.
wenzelm@33842
  1277
wenzelm@33843
  1278
* Operations of structure Skip_Proof no longer require quick_and_dirty
wenzelm@33843
  1279
mode, which avoids critical setmp.
wenzelm@33843
  1280
wenzelm@31306
  1281
* Eliminated old Attrib.add_attributes, Method.add_methods and related
wenzelm@33842
  1282
combinators for "args".  INCOMPATIBILITY, need to use simplified
wenzelm@31306
  1283
Attrib/Method.setup introduced in Isabelle2009.
wenzelm@31304
  1284
wenzelm@32151
  1285
* Proper context for simpset_of, claset_of, clasimpset_of.  May fall
wenzelm@32151
  1286
back on global_simpset_of, global_claset_of, global_clasimpset_of as
wenzelm@32151
  1287
last resort.  INCOMPATIBILITY.
wenzelm@32151
  1288
wenzelm@32092
  1289
* Display.pretty_thm now requires a proper context (cf. former
wenzelm@32092
  1290
ProofContext.pretty_thm).  May fall back on Display.pretty_thm_global
wenzelm@32092
  1291
or even Display.pretty_thm_without_context as last resort.
wenzelm@32092
  1292
INCOMPATIBILITY.
wenzelm@32092
  1293
wenzelm@32433
  1294
* Discontinued Display.pretty_ctyp/cterm etc.  INCOMPATIBILITY, use
wenzelm@32433
  1295
Syntax.pretty_typ/term directly, preferably with proper context
wenzelm@32433
  1296
instead of global theory.
wenzelm@32433
  1297
wenzelm@31304
  1298
wenzelm@31308
  1299
*** System ***
wenzelm@31308
  1300
wenzelm@33842
  1301
* Further fine tuning of parallel proof checking, scales up to 8 cores
wenzelm@33842
  1302
(max. speedup factor 5.0).  See also Goal.parallel_proofs in ML and
wenzelm@33842
  1303
usedir option -q.
wenzelm@33842
  1304
wenzelm@32326
  1305
* Support for additional "Isabelle components" via etc/components, see
wenzelm@32326
  1306
also the system manual.
wenzelm@32326
  1307
wenzelm@32326
  1308
* The isabelle makeall tool now operates on all components with
wenzelm@32326
  1309
IsaMakefile, not just hardwired "logics".
wenzelm@32326
  1310
wenzelm@33842
  1311
* Removed "compress" option from isabelle-process and isabelle usedir;
wenzelm@33842
  1312
this is always enabled.
kleing@33818
  1313
wenzelm@31308
  1314
* Discontinued support for Poly/ML 4.x versions.
wenzelm@31308
  1315
wenzelm@33842
  1316
* Isabelle tool "wwwfind" provides web interface for 'find_theorems'
wenzelm@33842
  1317
on a given logic image.  This requires the lighttpd webserver and is
wenzelm@33842
  1318
currently supported on Linux only.
wenzelm@32061
  1319
wenzelm@31308
  1320
wenzelm@31304
  1321
wenzelm@30845
  1322
New in Isabelle2009 (April 2009)
wenzelm@30845
  1323
--------------------------------
haftmann@27104
  1324
wenzelm@27599
  1325
*** General ***
wenzelm@27599
  1326
wenzelm@28504
  1327
* Simplified main Isabelle executables, with less surprises on
wenzelm@28504
  1328
case-insensitive file-systems (such as Mac OS).
wenzelm@28504
  1329
wenzelm@28504
  1330
  - The main Isabelle tool wrapper is now called "isabelle" instead of
wenzelm@28504
  1331
    "isatool."
wenzelm@28504
  1332
wenzelm@28504
  1333
  - The former "isabelle" alias for "isabelle-process" has been
wenzelm@28504
  1334
    removed (should rarely occur to regular users).
wenzelm@28504
  1335
wenzelm@28915
  1336
  - The former "isabelle-interface" and its alias "Isabelle" have been
wenzelm@28915
  1337
    removed (interfaces are now regular Isabelle tools).
wenzelm@28504
  1338
wenzelm@28504
  1339
Within scripts and make files, the Isabelle environment variables
wenzelm@28504
  1340
ISABELLE_TOOL and ISABELLE_PROCESS replace old ISATOOL and ISABELLE,
wenzelm@28504
  1341
respectively.  (The latter are still available as legacy feature.)
wenzelm@28504
  1342
wenzelm@28915
  1343
The old isabelle-interface wrapper could react in confusing ways if
wenzelm@28915
  1344
the interface was uninstalled or changed otherwise.  Individual
wenzelm@28915
  1345
interface tool configuration is now more explicit, see also the
wenzelm@28915
  1346
Isabelle system manual.  In particular, Proof General is now available
wenzelm@28915
  1347
via "isabelle emacs".
wenzelm@28504
  1348
wenzelm@28504
  1349
INCOMPATIBILITY, need to adapt derivative scripts.  Users may need to
wenzelm@28504
  1350
purge installed copies of Isabelle executables and re-run "isabelle
wenzelm@28504
  1351
install -p ...", or use symlinks.
wenzelm@28504
  1352
wenzelm@28914
  1353
* The default for ISABELLE_HOME_USER is now ~/.isabelle instead of the
wenzelm@30845
  1354
old ~/isabelle, which was slightly non-standard and apt to cause
wenzelm@30845
  1355
surprises on case-insensitive file-systems (such as Mac OS).
wenzelm@28914
  1356
wenzelm@28914
  1357
INCOMPATIBILITY, need to move existing ~/isabelle/etc,
wenzelm@28914
  1358
~/isabelle/heaps, ~/isabelle/browser_info to the new place.  Special
wenzelm@28914
  1359
care is required when using older releases of Isabelle.  Note that
wenzelm@28914
  1360
ISABELLE_HOME_USER can be changed in Isabelle/etc/settings of any
wenzelm@30845
  1361
Isabelle distribution, in order to use the new ~/.isabelle uniformly.
wenzelm@28914
  1362
wenzelm@29161
  1363
* Proofs of fully specified statements are run in parallel on
wenzelm@30845
  1364
multi-core systems.  A speedup factor of 2.5 to 3.2 can be expected on
wenzelm@30845
  1365
a regular 4-core machine, if the initial heap space is made reasonably
wenzelm@30845
  1366
large (cf. Poly/ML option -H).  (Requires Poly/ML 5.2.1 or later.)
wenzelm@30845
  1367
wenzelm@30845
  1368
* The main reference manuals ("isar-ref", "implementation", and
wenzelm@30845
  1369
"system") have been updated and extended.  Formally checked references
wenzelm@30845
  1370
as hyperlinks are now available uniformly.
wenzelm@30845
  1371
wenzelm@30163
  1372
wenzelm@27599
  1373
*** Pure ***
wenzelm@27599
  1374
wenzelm@30845
  1375
* Complete re-implementation of locales.  INCOMPATIBILITY in several
wenzelm@30845
  1376
respects.  The most important changes are listed below.  See the
wenzelm@30845
  1377
Tutorial on Locales ("locales" manual) for details.
ballarin@29253
  1378
ballarin@29253
  1379
- In locale expressions, instantiation replaces renaming.  Parameters
ballarin@29253
  1380
must be declared in a for clause.  To aid compatibility with previous
ballarin@29253
  1381
parameter inheritance, in locale declarations, parameters that are not
ballarin@29253
  1382
'touched' (instantiation position "_" or omitted) are implicitly added
ballarin@29253
  1383
with their syntax at the beginning of the for clause.
ballarin@29253
  1384
ballarin@29253
  1385
- Syntax from abbreviations and definitions in locales is available in
ballarin@29253
  1386
locale expressions and context elements.  The latter is particularly
ballarin@29253
  1387
useful in locale declarations.
ballarin@29253
  1388
ballarin@29253
  1389
- More flexible mechanisms to qualify names generated by locale
ballarin@29253
  1390
expressions.  Qualifiers (prefixes) may be specified in locale
wenzelm@30728
  1391
expressions, and can be marked as mandatory (syntax: "name!:") or
wenzelm@30728
  1392
optional (syntax "name?:").  The default depends for plain "name:"
wenzelm@30728
  1393
depends on the situation where a locale expression is used: in
wenzelm@30728
  1394
commands 'locale' and 'sublocale' prefixes are optional, in
wenzelm@30845
  1395
'interpretation' and 'interpret' prefixes are mandatory.  The old
wenzelm@30728
  1396
implicit qualifiers derived from the parameter names of a locale are
wenzelm@30728
  1397
no longer generated.
wenzelm@30106
  1398
wenzelm@30845
  1399
- Command "sublocale l < e" replaces "interpretation l < e".  The
wenzelm@30106
  1400
instantiation clause in "interpretation" and "interpret" (square
wenzelm@30106
  1401
brackets) is no longer available.  Use locale expressions.
ballarin@29253
  1402
wenzelm@30845
  1403
- When converting proof scripts, mandatory qualifiers in
wenzelm@30728
  1404
'interpretation' and 'interpret' should be retained by default, even
wenzelm@30845
  1405
if this is an INCOMPATIBILITY compared to former behavior.  In the
wenzelm@30845
  1406
worst case, use the "name?:" form for non-mandatory ones.  Qualifiers
wenzelm@30845
  1407
in locale expressions range over a single locale instance only.
wenzelm@30845
  1408
wenzelm@30845
  1409
- Dropped locale element "includes".  This is a major INCOMPATIBILITY.
wenzelm@30845
  1410
In existing theorem specifications replace the includes element by the
wenzelm@30845
  1411
respective context elements of the included locale, omitting those
wenzelm@30845
  1412
that are already present in the theorem specification.  Multiple
wenzelm@30845
  1413
assume elements of a locale should be replaced by a single one
wenzelm@30845
  1414
involving the locale predicate.  In the proof body, declarations (most
wenzelm@30845
  1415
notably theorems) may be regained by interpreting the respective
wenzelm@30845
  1416
locales in the proof context as required (command "interpret").
wenzelm@30845
  1417
wenzelm@30845
  1418
If using "includes" in replacement of a target solely because the
wenzelm@30845
  1419
parameter types in the theorem are not as general as in the target,
wenzelm@30845
  1420
consider declaring a new locale with additional type constraints on
wenzelm@30845
  1421
the parameters (context element "constrains").
wenzelm@30845
  1422
wenzelm@30845
  1423
- Discontinued "locale (open)".  INCOMPATIBILITY.
wenzelm@30845
  1424
wenzelm@30845
  1425
- Locale interpretation commands no longer attempt to simplify goal.
wenzelm@30845
  1426
INCOMPATIBILITY: in rare situations the generated goal differs.  Use
wenzelm@30845
  1427
methods intro_locales and unfold_locales to clarify.
wenzelm@30845
  1428
wenzelm@30845
  1429
- Locale interpretation commands no longer accept interpretation
wenzelm@30845
  1430
attributes.  INCOMPATIBILITY.
wenzelm@30845
  1431
wenzelm@30845
  1432
* Class declaration: so-called "base sort" must not be given in import
wenzelm@30845
  1433
list any longer, but is inferred from the specification.  Particularly
wenzelm@30845
  1434
in HOL, write
wenzelm@30845
  1435
wenzelm@30845
  1436
    class foo = ...
wenzelm@30845
  1437
wenzelm@30845
  1438
instead of
wenzelm@30845
  1439
wenzelm@30845
  1440
    class foo = type + ...
wenzelm@30845
  1441
wenzelm@30845
  1442
* Class target: global versions of theorems stemming do not carry a
wenzelm@30845
  1443
parameter prefix any longer.  INCOMPATIBILITY.
wenzelm@30845
  1444
wenzelm@30845
  1445
* Class 'instance' command no longer accepts attached definitions.
wenzelm@30845
  1446
INCOMPATIBILITY, use proper 'instantiation' target instead.
wenzelm@30845
  1447
wenzelm@30845
  1448
* Recovered hiding of consts, which was accidentally broken in
wenzelm@30845
  1449
Isabelle2007.  Potential INCOMPATIBILITY, ``hide const c'' really
wenzelm@30845
  1450
makes c inaccessible; consider using ``hide (open) const c'' instead.
wenzelm@30845
  1451
wenzelm@30845
  1452
* Slightly more coherent Pure syntax, with updated documentation in
wenzelm@30845
  1453
isar-ref manual.  Removed locales meta_term_syntax and
wenzelm@30845
  1454
meta_conjunction_syntax: TERM and &&& (formerly &&) are now permanent,
wenzelm@30845
  1455
INCOMPATIBILITY in rare situations.  Note that &&& should not be used
wenzelm@30845
  1456
directly in regular applications.
wenzelm@30845
  1457
wenzelm@30845
  1458
* There is a new syntactic category "float_const" for signed decimal
wenzelm@30845
  1459
fractions (e.g. 123.45 or -123.45).
wenzelm@30845
  1460
wenzelm@30845
  1461
* Removed exotic 'token_translation' command.  INCOMPATIBILITY, use ML
wenzelm@30845
  1462
interface with 'setup' command instead.
wenzelm@30845
  1463
wenzelm@30845
  1464
* Command 'local_setup' is similar to 'setup', but operates on a local
wenzelm@30845
  1465
theory context.
haftmann@27104
  1466
wenzelm@28114
  1467
* The 'axiomatization' command now only works within a global theory
wenzelm@28114
  1468
context.  INCOMPATIBILITY.
wenzelm@28114
  1469
wenzelm@30845
  1470
* Goal-directed proof now enforces strict proof irrelevance wrt. sort
wenzelm@30845
  1471
hypotheses.  Sorts required in the course of reasoning need to be
wenzelm@30845
  1472
covered by the constraints in the initial statement, completed by the
wenzelm@30845
  1473
type instance information of the background theory.  Non-trivial sort
wenzelm@30845
  1474
hypotheses, which rarely occur in practice, may be specified via
wenzelm@30845
  1475
vacuous propositions of the form SORT_CONSTRAINT('a::c).  For example:
wenzelm@30845
  1476
wenzelm@30845
  1477
  lemma assumes "SORT_CONSTRAINT('a::empty)" shows False ...
wenzelm@30845
  1478
wenzelm@30845
  1479
The result contains an implicit sort hypotheses as before --
wenzelm@30845
  1480
SORT_CONSTRAINT premises are eliminated as part of the canonical rule
wenzelm@30845
  1481
normalization.
wenzelm@30845
  1482
wenzelm@30845
  1483
* Generalized Isar history, with support for linear undo, direct state
wenzelm@30845
  1484
addressing etc.
wenzelm@30845
  1485
wenzelm@30845
  1486
* Changed defaults for unify configuration options:
wenzelm@30845
  1487
wenzelm@30845
  1488
  unify_trace_bound = 50 (formerly 25)
wenzelm@30845
  1489
  unify_search_bound = 60 (formerly 30)
wenzelm@30845
  1490
wenzelm@30845
  1491
* Different bookkeeping for code equations (INCOMPATIBILITY):
wenzelm@30845
  1492
wenzelm@30845
  1493
  a) On theory merge, the last set of code equations for a particular
wenzelm@30845
  1494
     constant is taken (in accordance with the policy applied by other
wenzelm@30845
  1495
     parts of the code generator framework).
wenzelm@30845
  1496
wenzelm@30845
  1497
  b) Code equations stemming from explicit declarations (e.g. code
wenzelm@30845
  1498
     attribute) gain priority over default code equations stemming
wenzelm@30845
  1499
     from definition, primrec, fun etc.
wenzelm@30845
  1500
wenzelm@30845
  1501
* Keyword 'code_exception' now named 'code_abort'.  INCOMPATIBILITY.
wenzelm@30845
  1502
haftmann@30965
  1503
* Unified theorem tables for both code generators.  Thus [code
wenzelm@30845
  1504
func] has disappeared and only [code] remains.  INCOMPATIBILITY.
wenzelm@30577
  1505
wenzelm@30577
  1506
* Command 'find_consts' searches for constants based on type and name
wenzelm@30577
  1507
patterns, e.g.
kleing@29883
  1508
kleing@29883
  1509
    find_consts "_ => bool"
kleing@29883
  1510
wenzelm@30106
  1511
By default, matching is against subtypes, but it may be restricted to
wenzelm@30728
  1512
the whole type.  Searching by name is possible.  Multiple queries are
wenzelm@30106
  1513
conjunctive and queries may be negated by prefixing them with a
wenzelm@30106
  1514
hyphen:
kleing@29883
  1515
kleing@29883
  1516
    find_consts strict: "_ => bool" name: "Int" -"int => int"
kleing@29861
  1517
wenzelm@30845
  1518
* New 'find_theorems' criterion "solves" matches theorems that
wenzelm@30845
  1519
directly solve the current goal (modulo higher-order unification).
wenzelm@30845
  1520
wenzelm@30845
  1521
* Auto solve feature for main theorem statements: whenever a new goal
wenzelm@30845
  1522
is stated, "find_theorems solves" is called; any theorems that could
wenzelm@30845
  1523
solve the lemma directly are listed as part of the goal state.
wenzelm@30845
  1524
Cf. associated options in Proof General Isabelle settings menu,
wenzelm@30845
  1525
enabled by default, with reasonable timeout for pathological cases of
wenzelm@30845
  1526
higher-order unification.
webertj@30415
  1527
haftmann@27104
  1528
wenzelm@27381
  1529
*** Document preparation ***
wenzelm@27381
  1530
wenzelm@27381
  1531
* Antiquotation @{lemma} now imitates a regular terminal proof,
wenzelm@27392
  1532
demanding keyword 'by' and supporting the full method expression
wenzelm@27519
  1533
syntax just like the Isar command 'by'.
wenzelm@27381
  1534
wenzelm@27381
  1535
haftmann@27104
  1536
*** HOL ***
haftmann@27104
  1537
wenzelm@30845
  1538
* Integrated main parts of former image HOL-Complex with HOL.  Entry
wenzelm@30845
  1539
points Main and Complex_Main remain as before.
wenzelm@30845
  1540
wenzelm@30845
  1541
* Logic image HOL-Plain provides a minimal HOL with the most important
wenzelm@30845
  1542
tools available (inductive, datatype, primrec, ...).  This facilitates
wenzelm@30845
  1543
experimentation and tool development.  Note that user applications
wenzelm@30845
  1544
(and library theories) should never refer to anything below theory
wenzelm@30845
  1545
Main, as before.
wenzelm@30845
  1546
wenzelm@30845
  1547
* Logic image HOL-Main stops at theory Main, and thus facilitates
wenzelm@30845
  1548
experimentation due to shorter build times.
wenzelm@30845
  1549
wenzelm@30845
  1550
* Logic image HOL-NSA contains theories of nonstandard analysis which
wenzelm@30845
  1551
were previously part of former HOL-Complex.  Entry point Hyperreal
wenzelm@30845
  1552
remains valid, but theories formerly using Complex_Main should now use
wenzelm@30845
  1553
new entry point Hypercomplex.
wenzelm@30845
  1554
wenzelm@30845
  1555
* Generic ATP manager for Sledgehammer, based on ML threads instead of
wenzelm@30845
  1556
Posix processes.  Avoids potentially expensive forking of the ML
wenzelm@30845
  1557
process.  New thread-based implementation also works on non-Unix
wenzelm@30845
  1558
platforms (Cygwin).  Provers are no longer hardwired, but defined
wenzelm@30845
  1559
within the theory via plain ML wrapper functions.  Basic Sledgehammer
wenzelm@30845
  1560
commands are covered in the isar-ref manual.
wenzelm@30845
  1561
wenzelm@30845
  1562
* Wrapper scripts for remote SystemOnTPTP service allows to use
wenzelm@30845
  1563
sledgehammer without local ATP installation (Vampire etc.). Other
wenzelm@30845
  1564
provers may be included via suitable ML wrappers, see also
wenzelm@30845
  1565
src/HOL/ATP_Linkup.thy.
wenzelm@30845
  1566
wenzelm@30845
  1567
* ATP selection (E/Vampire/Spass) is now via Proof General's settings
wenzelm@30845
  1568
menu.
wenzelm@30845
  1569
wenzelm@30845
  1570
* The metis method no longer fails because the theorem is too trivial
wenzelm@30845
  1571
(contains the empty clause).
wenzelm@30845
  1572
wenzelm@30845
  1573
* The metis method now fails in the usual manner, rather than raising
wenzelm@30845
  1574
an exception, if it determines that it cannot prove the theorem.
wenzelm@30845
  1575
wenzelm@30845
  1576
* Method "coherent" implements a prover for coherent logic (see also
wenzelm@30845
  1577
src/Tools/coherent.ML).
wenzelm@30845
  1578
wenzelm@30845
  1579
* Constants "undefined" and "default" replace "arbitrary".  Usually
wenzelm@30845
  1580
"undefined" is the right choice to replace "arbitrary", though
wenzelm@30845
  1581
logically there is no difference.  INCOMPATIBILITY.
wenzelm@30845
  1582
wenzelm@30845
  1583
* Command "value" now integrates different evaluation mechanisms.  The
wenzelm@30845
  1584
result of the first successful evaluation mechanism is printed.  In
wenzelm@30845
  1585
square brackets a particular named evaluation mechanisms may be
wenzelm@30845
  1586
specified (currently, [SML], [code] or [nbe]).  See further
wenzelm@30845
  1587
src/HOL/ex/Eval_Examples.thy.
wenzelm@30845
  1588
wenzelm@30845
  1589
* Normalization by evaluation now allows non-leftlinear equations.
wenzelm@30845
  1590
Declare with attribute [code nbe].
wenzelm@30845
  1591
wenzelm@30845
  1592
* Methods "case_tac" and "induct_tac" now refer to the very same rules
wenzelm@30845
  1593
as the structured Isar versions "cases" and "induct", cf. the
wenzelm@30845
  1594
corresponding "cases" and "induct" attributes.  Mutual induction rules
wenzelm@30845
  1595
are now presented as a list of individual projections
wenzelm@30845
  1596
(e.g. foo_bar.inducts for types foo and bar); the old format with
wenzelm@30845
  1597
explicit HOL conjunction is no longer supported.  INCOMPATIBILITY, in
wenzelm@30845
  1598
rare situations a different rule is selected --- notably nested tuple
wenzelm@30845
  1599
elimination instead of former prod.exhaust: use explicit (case_tac t
wenzelm@30845
  1600
rule: prod.exhaust) here.
wenzelm@30845
  1601
wenzelm@30845
  1602
* Attributes "cases", "induct", "coinduct" support "del" option.
wenzelm@30845
  1603
wenzelm@30845
  1604
* Removed fact "case_split_thm", which duplicates "case_split".
wenzelm@30845
  1605
wenzelm@30845
  1606
* The option datatype has been moved to a new theory Option.  Renamed
wenzelm@30845
  1607
option_map to Option.map, and o2s to Option.set, INCOMPATIBILITY.
wenzelm@30845
  1608
wenzelm@30845
  1609
* New predicate "strict_mono" classifies strict functions on partial
wenzelm@30845
  1610
orders.  With strict functions on linear orders, reasoning about
wenzelm@30845
  1611
(in)equalities is facilitated by theorems "strict_mono_eq",
wenzelm@30845
  1612
"strict_mono_less_eq" and "strict_mono_less".
wenzelm@30845
  1613
wenzelm@30845
  1614
* Some set operations are now proper qualified constants with
wenzelm@30845
  1615
authentic syntax.  INCOMPATIBILITY:
haftmann@30304
  1616
haftmann@30304
  1617
    op Int ~>   Set.Int
haftmann@30304
  1618
    op Un ~>    Set.Un
haftmann@30304
  1619
    INTER ~>    Set.INTER
haftmann@30304
  1620
    UNION ~>    Set.UNION
haftmann@30304
  1621
    Inter ~>    Set.Inter
haftmann@30304
  1622
    Union ~>    Set.Union
haftmann@30304
  1623
    {} ~>       Set.empty
haftmann@30304
  1624
    UNIV ~>     Set.UNIV
haftmann@30304
  1625
wenzelm@30845
  1626
* Class complete_lattice with operations Inf, Sup, INFI, SUPR now in
wenzelm@30845
  1627
theory Set.
wenzelm@30845
  1628
wenzelm@30845
  1629
* Auxiliary class "itself" has disappeared -- classes without any
wenzelm@30845
  1630
parameter are treated as expected by the 'class' command.
haftmann@29797
  1631
haftmann@29823
  1632
* Leibnitz's Series for Pi and the arcus tangens and logarithm series.
haftmann@29823
  1633
wenzelm@30845
  1634
* Common decision procedures (Cooper, MIR, Ferrack, Approximation,
wenzelm@30845
  1635
Dense_Linear_Order) are now in directory HOL/Decision_Procs.
wenzelm@30845
  1636
wenzelm@30845
  1637
* Theory src/HOL/Decision_Procs/Approximation provides the new proof
wenzelm@30845
  1638
method "approximation".  It proves formulas on real values by using
wenzelm@30845
  1639
interval arithmetic.  In the formulas are also the transcendental
wenzelm@30845
  1640
functions sin, cos, tan, atan, ln, exp and the constant pi are
wenzelm@30845
  1641
allowed. For examples see
wenzelm@30845
  1642
src/HOL/Descision_Procs/ex/Approximation_Ex.thy.
haftmann@29823
  1643
haftmann@29823
  1644
* Theory "Reflection" now resides in HOL/Library.
haftmann@29650
  1645
wenzelm@30845
  1646
* Entry point to Word library now simply named "Word".
wenzelm@30845
  1647
INCOMPATIBILITY.
haftmann@29628
  1648
haftmann@29197
  1649
* Made source layout more coherent with logical distribution
haftmann@29197
  1650
structure:
haftmann@28952
  1651
haftmann@28952
  1652
    src/HOL/Library/RType.thy ~> src/HOL/Typerep.thy
haftmann@28952
  1653
    src/HOL/Library/Code_Message.thy ~> src/HOL/
haftmann@28952
  1654
    src/HOL/Library/GCD.thy ~> src/HOL/
haftmann@28952
  1655
    src/HOL/Library/Order_Relation.thy ~> src/HOL/
haftmann@28952
  1656
    src/HOL/Library/Parity.thy ~> src/HOL/
haftmann@28952
  1657
    src/HOL/Library/Univ_Poly.thy ~> src/HOL/
huffman@30176
  1658
    src/HOL/Real/ContNotDenum.thy ~> src/HOL/Library/
haftmann@28952
  1659
    src/HOL/Real/Lubs.thy ~> src/HOL/
haftmann@28952
  1660
    src/HOL/Real/PReal.thy ~> src/HOL/
haftmann@28952
  1661
    src/HOL/Real/Rational.thy ~> src/HOL/
haftmann@28952
  1662
    src/HOL/Real/RComplete.thy ~> src/HOL/
haftmann@28952
  1663
    src/HOL/Real/RealDef.thy ~> src/HOL/
haftmann@28952
  1664
    src/HOL/Real/RealPow.thy ~> src/HOL/
haftmann@28952
  1665
    src/HOL/Real/Real.thy ~> src/HOL/
haftmann@28952
  1666
    src/HOL/Complex/Complex_Main.thy ~> src/HOL/
haftmann@28952
  1667
    src/HOL/Complex/Complex.thy ~> src/HOL/
huffman@30176
  1668
    src/HOL/Complex/FrechetDeriv.thy ~> src/HOL/Library/
huffman@30176
  1669
    src/HOL/Complex/Fundamental_Theorem_Algebra.thy ~> src/HOL/Library/
haftmann@28952
  1670
    src/HOL/Hyperreal/Deriv.thy ~> src/HOL/
haftmann@28952
  1671
    src/HOL/Hyperreal/Fact.thy ~> src/HOL/
haftmann@28952
  1672
    src/HOL/Hyperreal/Integration.thy ~> src/HOL/
haftmann@28952
  1673
    src/HOL/Hyperreal/Lim.thy ~> src/HOL/
haftmann@28952
  1674
    src/HOL/Hyperreal/Ln.thy ~> src/HOL/
haftmann@28952
  1675
    src/HOL/Hyperreal/Log.thy ~> src/HOL/
haftmann@28952
  1676
    src/HOL/Hyperreal/MacLaurin.thy ~> src/HOL/
haftmann@28952
  1677
    src/HOL/Hyperreal/NthRoot.thy ~> src/HOL/
haftmann@28952
  1678
    src/HOL/Hyperreal/Series.thy ~> src/HOL/
haftmann@29197
  1679
    src/HOL/Hyperreal/SEQ.thy ~> src/HOL/
haftmann@28952
  1680
    src/HOL/Hyperreal/Taylor.thy ~> src/HOL/
haftmann@28952
  1681
    src/HOL/Hyperreal/Transcendental.thy ~> src/HOL/
haftmann@28952
  1682
    src/HOL/Real/Float ~> src/HOL/Library/
haftmann@29197
  1683
    src/HOL/Real/HahnBanach ~> src/HOL/HahnBanach
haftmann@29197
  1684
    src/HOL/Real/RealVector.thy ~> src/HOL/
haftmann@28952
  1685
haftmann@28952
  1686
    src/HOL/arith_data.ML ~> src/HOL/Tools
haftmann@28952
  1687
    src/HOL/hologic.ML ~> src/HOL/Tools
haftmann@28952
  1688
    src/HOL/simpdata.ML ~> src/HOL/Tools
haftmann@28952
  1689
    src/HOL/int_arith1.ML ~> src/HOL/Tools/int_arith.ML
haftmann@28952
  1690
    src/HOL/int_factor_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  1691
    src/HOL/nat_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  1692
    src/HOL/Real/float_arith.ML ~> src/HOL/Tools
haftmann@28952
  1693
    src/HOL/Real/float_syntax.ML ~> src/HOL/Tools
haftmann@28952
  1694
    src/HOL/Real/rat_arith.ML ~> src/HOL/Tools
haftmann@28952
  1695
    src/HOL/Real/real_arith.ML ~> src/HOL/Tools
haftmann@28952
  1696
haftmann@29398
  1697
    src/HOL/Library/Array.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  1698
    src/HOL/Library/Heap_Monad.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  1699
    src/HOL/Library/Heap.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  1700
    src/HOL/Library/Imperative_HOL.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  1701
    src/HOL/Library/Ref.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  1702
    src/HOL/Library/Relational.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  1703
wenzelm@30845
  1704
* If methods "eval" and "evaluation" encounter a structured proof
wenzelm@30845
  1705
state with !!/==>, only the conclusion is evaluated to True (if
wenzelm@30845
  1706
possible), avoiding strange error messages.
wenzelm@30845
  1707
wenzelm@30845
  1708
* Method "sizechange" automates termination proofs using (a
wenzelm@30845
  1709
modification of) the size-change principle.  Requires SAT solver.  See
wenzelm@30845
  1710
src/HOL/ex/Termination.thy for examples.
wenzelm@30845
  1711
wenzelm@30845
  1712
* Simplifier: simproc for let expressions now unfolds if bound
wenzelm@30845
  1713
variable occurs at most once in let expression body.  INCOMPATIBILITY.
wenzelm@30845
  1714
wenzelm@30845
  1715
* Method "arith": Linear arithmetic now ignores all inequalities when
wenzelm@30845
  1716
fast_arith_neq_limit is exceeded, instead of giving up entirely.
wenzelm@30845
  1717
wenzelm@30845
  1718
* New attribute "arith" for facts that should always be used
wenzelm@30845
  1719
automatically by arithmetic. It is intended to be used locally in
wenzelm@30845
  1720
proofs, e.g.
wenzelm@30845
  1721
wenzelm@30845
  1722
  assumes [arith]: "x > 0"
wenzelm@30845
  1723
nipkow@30706
  1724
Global usage is discouraged because of possible performance impact.
nipkow@30706
  1725
wenzelm@30845
  1726
* New classes "top" and "bot" with corresponding operations "top" and
wenzelm@30845
  1727
"bot" in theory Orderings; instantiation of class "complete_lattice"
wenzelm@30845
  1728
requires instantiation of classes "top" and "bot".  INCOMPATIBILITY.
wenzelm@30845
  1729
wenzelm@30845
  1730
* Changed definition lemma "less_fun_def" in order to provide an
wenzelm@30845
  1731
instance for preorders on functions; use lemma "less_le" instead.
wenzelm@30845
  1732
INCOMPATIBILITY.
wenzelm@30845
  1733
wenzelm@30845
  1734
* Theory Orderings: class "wellorder" moved here, with explicit
wenzelm@30845
  1735
induction rule "less_induct" as assumption.  For instantiation of
wenzelm@30845
  1736
"wellorder" by means of predicate "wf", use rule wf_wellorderI.
wenzelm@30845
  1737
INCOMPATIBILITY.
wenzelm@30845
  1738
wenzelm@30845
  1739
* Theory Orderings: added class "preorder" as superclass of "order".
wenzelm@27793
  1740
INCOMPATIBILITY: Instantiation proofs for order, linorder
wenzelm@27793
  1741
etc. slightly changed.  Some theorems named order_class.* now named
wenzelm@27793
  1742
preorder_class.*.
wenzelm@27793
  1743
wenzelm@30845
  1744
* Theory Relation: renamed "refl" to "refl_on", "reflexive" to "refl,
wenzelm@30845
  1745
"diag" to "Id_on".
wenzelm@30845
  1746
wenzelm@30845
  1747
* Theory Finite_Set: added a new fold combinator of type
wenzelm@30845
  1748
nipkow@28855
  1749
  ('a => 'b => 'b) => 'b => 'a set => 'b
wenzelm@30845
  1750
wenzelm@30845
  1751
Occasionally this is more convenient than the old fold combinator
wenzelm@30845
  1752
which is now defined in terms of the new one and renamed to
wenzelm@30845
  1753
fold_image.
wenzelm@30845
  1754
wenzelm@30845
  1755
* Theories Ring_and_Field and OrderedGroup: The lemmas "group_simps"
wenzelm@30845
  1756
and "ring_simps" have been replaced by "algebra_simps" (which can be
wenzelm@30845
  1757
extended with further lemmas!).  At the moment both still exist but
wenzelm@30845
  1758
the former will disappear at some point.
wenzelm@30845
  1759
wenzelm@30845
  1760
* Theory Power: Lemma power_Suc is now declared as a simp rule in
wenzelm@30845
  1761
class recpower.  Type-specific simp rules for various recpower types
wenzelm@30845
  1762
have been removed.  INCOMPATIBILITY, rename old lemmas as follows:
huffman@30273
  1763
huffman@30273
  1764
rat_power_0    -> power_0
huffman@30273
  1765
rat_power_Suc  -> power_Suc
huffman@30273
  1766
realpow_0      -> power_0
huffman@30273
  1767
realpow_Suc    -> power_Suc
huffman@30273
  1768
complexpow_0   -> power_0
huffman@30273
  1769
complexpow_Suc -> power_Suc
huffman@30273
  1770
power_poly_0   -> power_0
huffman@30273
  1771
power_poly_Suc -> power_Suc
huffman@30273
  1772
wenzelm@30845
  1773
* Theories Ring_and_Field and Divides: Definition of "op dvd" has been
wenzelm@27793
  1774
moved to separate class dvd in Ring_and_Field; a couple of lemmas on
wenzelm@27793
  1775
dvd has been generalized to class comm_semiring_1.  Likewise a bunch
wenzelm@27793
  1776
of lemmas from Divides has been generalized from nat to class
wenzelm@27793
  1777
semiring_div.  INCOMPATIBILITY.  This involves the following theorem
wenzelm@27793
  1778
renames resulting from duplicate elimination:
haftmann@27651
  1779
haftmann@27651
  1780
    dvd_def_mod ~>          dvd_eq_mod_eq_0
haftmann@27651
  1781
    zero_dvd_iff ~>         dvd_0_left_iff
haftmann@28559
  1782
    dvd_0 ~>                dvd_0_right
haftmann@27651
  1783
    DIVISION_BY_ZERO_DIV ~> div_by_0
haftmann@27651
  1784
    DIVISION_BY_ZERO_MOD ~> mod_by_0
haftmann@27651
  1785
    mult_div ~>             div_mult_self2_is_id
haftmann@27651
  1786
    mult_mod ~>             mod_mult_self2_is_0
haftmann@27651
  1787
wenzelm@30845
  1788
* Theory IntDiv: removed many lemmas that are instances of class-based
wenzelm@30845
  1789
generalizations (from Divides and Ring_and_Field).  INCOMPATIBILITY,
wenzelm@30845
  1790
rename old lemmas as follows:
nipkow@30044
  1791
nipkow@30044
  1792
dvd_diff               -> nat_dvd_diff
nipkow@30044
  1793
dvd_zminus_iff         -> dvd_minus_iff
nipkow@30224
  1794
mod_add1_eq            -> mod_add_eq
nipkow@30224
  1795
mod_mult1_eq           -> mod_mult_right_eq
nipkow@30224
  1796
mod_mult1_eq'          -> mod_mult_left_eq
nipkow@30224
  1797
mod_mult_distrib_mod   -> mod_mult_eq
nipkow@30044
  1798
nat_mod_add_left_eq    -> mod_add_left_eq
nipkow@30044
  1799
nat_mod_add_right_eq   -> mod_add_right_eq
nipkow@30044
  1800
nat_mod_div_trivial    -> mod_div_trivial
nipkow@30044
  1801
nat_mod_mod_trivial    -> mod_mod_trivial
nipkow@30044
  1802
zdiv_zadd_self1        -> div_add_self1
nipkow@30044
  1803
zdiv_zadd_self2        -> div_add_self2
nipkow@30181
  1804
zdiv_zmult_self1       -> div_mult_self2_is_id
nipkow@30044
  1805
zdiv_zmult_self2       -> div_mult_self1_is_id
nipkow@30044
  1806
zdvd_triv_left         -> dvd_triv_left
nipkow@30044
  1807
zdvd_triv_right        -> dvd_triv_right
nipkow@30044
  1808
zdvd_zmult_cancel_disj -> dvd_mult_cancel_left
nipkow@30085
  1809
zmod_eq0_zdvd_iff      -> dvd_eq_mod_eq_0[symmetric]
nipkow@30044
  1810
zmod_zadd_left_eq      -> mod_add_left_eq
nipkow@30044
  1811
zmod_zadd_right_eq     -> mod_add_right_eq
nipkow@30044
  1812
zmod_zadd_self1        -> mod_add_self1
nipkow@30044
  1813
zmod_zadd_self2        -> mod_add_self2
nipkow@30224
  1814
zmod_zadd1_eq          -> mod_add_eq
nipkow@30044
  1815
zmod_zdiff1_eq         -> mod_diff_eq
nipkow@30044
  1816
zmod_zdvd_zmod         -> mod_mod_cancel
nipkow@30044
  1817
zmod_zmod_cancel       -> mod_mod_cancel
nipkow@30044
  1818
zmod_zmult_self1       -> mod_mult_self2_is_0
nipkow@30044
  1819
zmod_zmult_self2       -> mod_mult_self1_is_0
nipkow@30044
  1820
zmod_1                 -> mod_by_1
nipkow@30044
  1821
zdiv_1                 -> div_by_1
nipkow@30044
  1822
zdvd_abs1              -> abs_dvd_iff
nipkow@30044
  1823
zdvd_abs2              -> dvd_abs_iff
nipkow@30044
  1824
zdvd_refl              -> dvd_refl
nipkow@30044
  1825
zdvd_trans             -> dvd_trans
nipkow@30044
  1826
zdvd_zadd              -> dvd_add
nipkow@30044
  1827
zdvd_zdiff             -> dvd_diff
nipkow@30044
  1828
zdvd_zminus_iff        -> dvd_minus_iff
nipkow@30044
  1829
zdvd_zminus2_iff       -> minus_dvd_iff
nipkow@30044
  1830
zdvd_zmultD            -> dvd_mult_right
nipkow@30044
  1831
zdvd_zmultD2           -> dvd_mult_left
nipkow@30044
  1832
zdvd_zmult_mono        -> mult_dvd_mono
nipkow@30044
  1833
zdvd_0_right           -> dvd_0_right
nipkow@30044
  1834
zdvd_0_left            -> dvd_0_left_iff
nipkow@30044
  1835
zdvd_1_left            -> one_dvd
nipkow@30044
  1836
zminus_dvd_iff         -> minus_dvd_iff
nipkow@30044
  1837
wenzelm@30845
  1838
* Theory Rational: 'Fract k 0' now equals '0'.  INCOMPATIBILITY.
wenzelm@30845
  1839
wenzelm@30845
  1840
* The real numbers offer decimal input syntax: 12.34 is translated
wenzelm@30845
  1841
into 1234/10^2. This translation is not reversed upon output.
wenzelm@30845
  1842
wenzelm@30845
  1843
* Theory Library/Polynomial defines an abstract type 'a poly of
wenzelm@30845
  1844
univariate polynomials with coefficients of type 'a.  In addition to
wenzelm@30845
  1845
the standard ring operations, it also supports div and mod.  Code
wenzelm@30845
  1846
generation is also supported, using list-style constructors.
wenzelm@30845
  1847
wenzelm@30845
  1848
* Theory Library/Inner_Product defines a class of real_inner for real
wenzelm@30845
  1849
inner product spaces, with an overloaded operation inner :: 'a => 'a
wenzelm@30845
  1850
=> real.  Class real_inner is a subclass of real_normed_vector from
wenzelm@30845
  1851
theory RealVector.
wenzelm@30845
  1852
wenzelm@30845
  1853
* Theory Library/Product_Vector provides instances for the product
wenzelm@30845
  1854
type 'a * 'b of several classes from RealVector and Inner_Product.
wenzelm@30845
  1855
Definitions of addition, subtraction, scalar multiplication, norms,
wenzelm@30845
  1856
and inner products are included.
wenzelm@30845
  1857
wenzelm@30845
  1858
* Theory Library/Bit defines the field "bit" of integers modulo 2.  In
wenzelm@30845
  1859
addition to the field operations, numerals and case syntax are also
wenzelm@30845
  1860
supported.
wenzelm@30845
  1861
wenzelm@30845
  1862
* Theory Library/Diagonalize provides constructive version of Cantor's
wenzelm@30845
  1863
first diagonalization argument.
wenzelm@30845
  1864
wenzelm@30845
  1865
* Theory Library/GCD: Curried operations gcd, lcm (for nat) and zgcd,
wenzelm@27599
  1866
zlcm (for int); carried together from various gcd/lcm developements in
wenzelm@30845
  1867
the HOL Distribution.  Constants zgcd and zlcm replace former igcd and
wenzelm@30845
  1868
ilcm; corresponding theorems renamed accordingly.  INCOMPATIBILITY,
wenzelm@30845
  1869
may recover tupled syntax as follows:
haftmann@27556
  1870
haftmann@27556
  1871
    hide (open) const gcd
haftmann@27556
  1872
    abbreviation gcd where
haftmann@27556
  1873
      "gcd == (%(a, b). GCD.gcd a b)"
haftmann@27556
  1874
    notation (output)
haftmann@27556
  1875
      GCD.gcd ("gcd '(_, _')")
haftmann@27556
  1876
wenzelm@30845
  1877
The same works for lcm, zgcd, zlcm.
wenzelm@30845
  1878
wenzelm@30845
  1879
* Theory Library/Nat_Infinity: added addition, numeral syntax and more
wenzelm@30845
  1880
instantiations for algebraic structures.  Removed some duplicate
wenzelm@30845
  1881
theorems.  Changes in simp rules.  INCOMPATIBILITY.
wenzelm@30845
  1882
wenzelm@30845
  1883
* ML antiquotation @{code} takes a constant as argument and generates
haftmann@27651
  1884
corresponding code in background and inserts name of the corresponding
haftmann@27651
  1885
resulting ML value/function/datatype constructor binding in place.
haftmann@27651
  1886
All occurrences of @{code} with a single ML block are generated
haftmann@27651
  1887
simultaneously.  Provides a generic and safe interface for
wenzelm@30845
  1888
instrumentalizing code generation.  See
wenzelm@30845
  1889
src/HOL/Decision_Procs/Ferrack.thy for a more ambitious application.
wenzelm@30845
  1890
In future you ought to refrain from ad-hoc compiling generated SML
wenzelm@30845
  1891
code on the ML toplevel.  Note that (for technical reasons) @{code}
wenzelm@30845
  1892
cannot refer to constants for which user-defined serializations are
wenzelm@30845
  1893
set.  Refer to the corresponding ML counterpart directly in that
wenzelm@30845
  1894
cases.
wenzelm@27122
  1895
wenzelm@27122
  1896
* Command 'rep_datatype': instead of theorem names the command now
wenzelm@27122
  1897
takes a list of terms denoting the constructors of the type to be
wenzelm@27122
  1898
represented as datatype.  The characteristic theorems have to be
wenzelm@27122
  1899
proven.  INCOMPATIBILITY.  Also observe that the following theorems
wenzelm@27122
  1900
have disappeared in favour of existing ones:
wenzelm@27122
  1901
haftmann@27104
  1902
    unit_induct                 ~> unit.induct
haftmann@27104
  1903
    prod_induct                 ~> prod.induct
haftmann@27104
  1904
    sum_induct                  ~> sum.induct
haftmann@27104
  1905
    Suc_Suc_eq                  ~> nat.inject
haftmann@27104
  1906
    Suc_not_Zero Zero_not_Suc   ~> nat.distinct
haftmann@27104
  1907
haftmann@27104
  1908
ballarin@27696
  1909
*** HOL-Algebra ***
ballarin@27696
  1910
ballarin@27713
  1911
* New locales for orders and lattices where the equivalence relation
wenzelm@30106
  1912
is not restricted to equality.  INCOMPATIBILITY: all order and lattice
wenzelm@30106
  1913
locales use a record structure with field eq for the equivalence.
ballarin@27713
  1914
ballarin@27713
  1915
* New theory of factorial domains.
ballarin@27713
  1916
wenzelm@30845
  1917
* Units_l_inv and Units_r_inv are now simp rules by default.
ballarin@27696
  1918
INCOMPATIBILITY.  Simplifier proof that require deletion of l_inv
ballarin@27696
  1919
and/or r_inv will now also require deletion of these lemmas.
ballarin@27696
  1920
wenzelm@30845
  1921
* Renamed the following theorems, INCOMPATIBILITY:
wenzelm@30845
  1922
ballarin@27696
  1923
UpperD ~> Upper_memD
ballarin@27696
  1924
LowerD ~> Lower_memD
ballarin@27696
  1925
least_carrier ~> least_closed
ballarin@27696
  1926
greatest_carrier ~> greatest_closed
ballarin@27696
  1927
greatest_Lower_above ~> greatest_Lower_below
ballarin@27717
  1928
one_zero ~> carrier_one_zero
ballarin@27717
  1929
one_not_zero ~> carrier_one_not_zero  (collision with assumption)
ballarin@27696
  1930
wenzelm@27793
  1931
wenzelm@30849
  1932
*** HOL-Nominal ***
wenzelm@30849
  1933
wenzelm@30855
  1934
* Nominal datatypes can now contain type-variables.
wenzelm@30855
  1935
wenzelm@30855
  1936
* Commands 'nominal_inductive' and 'equivariance' work with local
wenzelm@30855
  1937
theory targets.
wenzelm@30855
  1938
wenzelm@30855
  1939
* Nominal primrec can now works with local theory targets and its
wenzelm@30855
  1940
specification syntax now conforms to the general format as seen in
wenzelm@30855
  1941
'inductive' etc.
wenzelm@30855
  1942
wenzelm@30855
  1943
* Method "perm_simp" honours the standard simplifier attributes
wenzelm@30855
  1944
(no_asm), (no_asm_use) etc.
wenzelm@30855
  1945
wenzelm@30855
  1946
* The new predicate #* is defined like freshness, except that on the
wenzelm@30855
  1947
left hand side can be a set or list of atoms.
wenzelm@30855
  1948
wenzelm@30855
  1949
* Experimental command 'nominal_inductive2' derives strong induction
wenzelm@30855
  1950
principles for inductive definitions.  In contrast to
wenzelm@30855
  1951
'nominal_inductive', which can only deal with a fixed number of
wenzelm@30855
  1952
binders, it can deal with arbitrary expressions standing for sets of
wenzelm@30855
  1953
atoms to be avoided.  The only inductive definition we have at the
wenzelm@30855
  1954
moment that needs this generalisation is the typing rule for Lets in
wenzelm@30855
  1955
the algorithm W:
wenzelm@30855
  1956
wenzelm@30855
  1957
 Gamma |- t1 : T1   (x,close Gamma T1)::Gamma |- t2 : T2   x#Gamma
wenzelm@30855
  1958
 -----------------------------------------------------------------
wenzelm@30855
  1959
         Gamma |- Let x be t1 in t2 : T2
wenzelm@30855
  1960
wenzelm@30855
  1961
In this rule one wants to avoid all the binders that are introduced by
wenzelm@30855
  1962
"close Gamma T1".  We are looking for other examples where this
wenzelm@30855
  1963
feature might be useful.  Please let us know.
wenzelm@30849
  1964
wenzelm@30849
  1965
huffman@30176
  1966
*** HOLCF ***
huffman@30176
  1967
huffman@30176
  1968
* Reimplemented the simplification procedure for proving continuity
huffman@30176
  1969
subgoals.  The new simproc is extensible; users can declare additional
huffman@30176
  1970
continuity introduction rules with the attribute [cont2cont].
huffman@30176
  1971
huffman@30176
  1972
* The continuity simproc now uses a different introduction rule for
huffman@30176
  1973
solving continuity subgoals on terms with lambda abstractions.  In
huffman@30176
  1974
some rare cases the new simproc may fail to solve subgoals that the
huffman@30176
  1975
old one could solve, and "simp add: cont2cont_LAM" may be necessary.
huffman@30176
  1976
Potential INCOMPATIBILITY.
huffman@30176
  1977
wenzelm@30847
  1978
* Command 'fixrec': specification syntax now conforms to the general
wenzelm@30855
  1979
format as seen in 'inductive' etc.  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@30855
  1980
examples.  INCOMPATIBILITY.
wenzelm@30845
  1981
wenzelm@30845
  1982
wenzelm@30845
  1983
*** ZF ***
wenzelm@30845
  1984
wenzelm@30845
  1985
* Proof of Zorn's Lemma for partial orders.
huffman@30176
  1986
huffman@30176
  1987
wenzelm@27246
  1988
*** ML ***
wenzelm@28088
  1989
wenzelm@30845
  1990
* Multithreading for Poly/ML 5.1/5.2 is no longer supported, only for
wenzelm@30845
  1991
Poly/ML 5.2.1 or later.  Important note: the TimeLimit facility
wenzelm@30845
  1992
depends on multithreading, so timouts will not work before Poly/ML
wenzelm@30845
  1993
5.2.1!
wenzelm@30845
  1994
wenzelm@29161
  1995
* High-level support for concurrent ML programming, see
wenzelm@29161
  1996
src/Pure/Cuncurrent.  The data-oriented model of "future values" is
wenzelm@29161
  1997
particularly convenient to organize independent functional
wenzelm@29161
  1998
computations.  The concept of "synchronized variables" provides a
wenzelm@29161
  1999
higher-order interface for components with shared state, avoiding the
wenzelm@30845
  2000
delicate details of mutexes and condition variables.  (Requires
wenzelm@30845
  2001
Poly/ML 5.2.1 or later.)
wenzelm@30845
  2002
wenzelm@30845
  2003
* ML bindings produced via Isar commands are stored within the Isar
wenzelm@30845
  2004
context (theory or proof).  Consequently, commands like 'use' and 'ML'
wenzelm@30845
  2005
become thread-safe and work with undo as expected (concerning
wenzelm@30845
  2006
top-level bindings, not side-effects on global references).
wenzelm@30845
  2007
INCOMPATIBILITY, need to provide proper Isar context when invoking the
wenzelm@30845
  2008
compiler at runtime; really global bindings need to be given outside a
wenzelm@30845
  2009
theory.  (Requires Poly/ML 5.2 or later.)
wenzelm@30845
  2010
wenzelm@30845
  2011
* Command 'ML_prf' is analogous to 'ML' but works within a proof
wenzelm@30845
  2012
context.  Top-level ML bindings are stored within the proof context in
wenzelm@30845
  2013
a purely sequential fashion, disregarding the nested proof structure.
wenzelm@30845
  2014
ML bindings introduced by 'ML_prf' are discarded at the end of the
wenzelm@30845
  2015
proof.  (Requires Poly/ML 5.2 or later.)
wenzelm@29161
  2016
wenzelm@30530
  2017
* Simplified ML attribute and method setup, cf. functions Attrib.setup
wenzelm@30845
  2018
and Method.setup, as well as Isar commands 'attribute_setup' and
wenzelm@30547
  2019
'method_setup'.  INCOMPATIBILITY for 'method_setup', need to simplify
wenzelm@30547
  2020
existing code accordingly, or use plain 'setup' together with old
wenzelm@30547
  2021
Method.add_method.
wenzelm@30530
  2022
wenzelm@28294
  2023
* Simplified ML oracle interface Thm.add_oracle promotes 'a -> cterm
wenzelm@28294
  2024
to 'a -> thm, while results are always tagged with an authentic oracle
wenzelm@28294
  2025
name.  The Isar command 'oracle' is now polymorphic, no argument type
wenzelm@28294
  2026
is specified.  INCOMPATIBILITY, need to simplify existing oracle code
wenzelm@28294
  2027
accordingly.  Note that extra performance may be gained by producing
wenzelm@28294
  2028
the cterm carefully, avoiding slow Thm.cterm_of.
wenzelm@28294
  2029
wenzelm@30845
  2030
* Simplified interface for defining document antiquotations via
wenzelm@30845
  2031
ThyOutput.antiquotation, ThyOutput.output, and optionally
wenzelm@30845
  2032
ThyOutput.maybe_pretty_source.  INCOMPATIBILITY, need to simplify user
wenzelm@30845
  2033
antiquotations accordingly, see src/Pure/Thy/thy_output.ML for common
wenzelm@30845
  2034
examples.
wenzelm@28099
  2035
wenzelm@30395
  2036
* More systematic treatment of long names, abstract name bindings, and
wenzelm@30395
  2037
name space operations.  Basic operations on qualified names have been
wenzelm@30399
  2038
move from structure NameSpace to Long_Name, e.g. Long_Name.base_name,
wenzelm@30395
  2039
Long_Name.append.  Old type bstring has been mostly replaced by
wenzelm@30395
  2040
abstract type binding (see structure Binding), which supports precise
wenzelm@30845
  2041
qualification by packages and local theory targets, as well as proper
wenzelm@30845
  2042
tracking of source positions.  INCOMPATIBILITY, need to wrap old
wenzelm@30845
  2043
bstring values into Binding.name, or better pass through abstract
wenzelm@30399
  2044
bindings everywhere.  See further src/Pure/General/long_name.ML,
wenzelm@30395
  2045
src/Pure/General/binding.ML and src/Pure/General/name_space.ML
wenzelm@30395
  2046
wenzelm@28089
  2047
* Result facts (from PureThy.note_thms, ProofContext.note_thms,
wenzelm@28089
  2048
LocalTheory.note etc.) now refer to the *full* internal name, not the
wenzelm@28089
  2049
bstring as before.  INCOMPATIBILITY, not detected by ML type-checking!
wenzelm@28089
  2050
wenzelm@27287
  2051
* Disposed old type and term read functions (Sign.read_def_typ,
wenzelm@27287
  2052
Sign.read_typ, Sign.read_def_terms, Sign.read_term,
wenzelm@27287
  2053
Thm.read_def_cterms, Thm.read_cterm etc.).  INCOMPATIBILITY, should
wenzelm@27287
  2054
use regular Syntax.read_typ, Syntax.read_term, Syntax.read_typ_global,
wenzelm@27269
  2055
Syntax.read_term_global etc.; see also OldGoals.read_term as last
wenzelm@27269
  2056
resort for legacy applications.
wenzelm@27269
  2057
wenzelm@30609
  2058
* Disposed old declarations, tactics, tactic combinators that refer to
wenzelm@30609
  2059
the simpset or claset of an implicit theory (such as Addsimps,
wenzelm@30609
  2060
Simp_tac, SIMPSET).  INCOMPATIBILITY, should use @{simpset} etc. in
wenzelm@30609
  2061
embedded ML text, or local_simpset_of with a proper context passed as
wenzelm@30609
  2062
explicit runtime argument.
wenzelm@30609
  2063
wenzelm@30845
  2064
* Rules and tactics that read instantiations (read_instantiate,
wenzelm@30845
  2065
res_inst_tac, thin_tac, subgoal_tac etc.) now demand a proper proof
wenzelm@30845
  2066
context, which is required for parsing and type-checking.  Moreover,
wenzelm@30845
  2067
the variables are specified as plain indexnames, not string encodings
wenzelm@30845
  2068
thereof.  INCOMPATIBILITY.
wenzelm@30845
  2069
wenzelm@30845
  2070
* Generic Toplevel.add_hook interface allows to analyze the result of
wenzelm@30845
  2071
transactions.  E.g. see src/Pure/ProofGeneral/proof_general_pgip.ML
wenzelm@30845
  2072
for theorem dependency output of transactions resulting in a new
wenzelm@30845
  2073
theory state.
wenzelm@30845
  2074
wenzelm@30845
  2075
* ML antiquotations: block-structured compilation context indicated by
wenzelm@27391
  2076
\<lbrace> ... \<rbrace>; additional antiquotation forms:
wenzelm@27391
  2077
wenzelm@30845
  2078
  @{binding name}                         - basic name binding
wenzelm@27519
  2079
  @{let ?pat = term}                      - term abbreviation (HO matching)
wenzelm@27519
  2080
  @{note name = fact}                     - fact abbreviation
wenzelm@27519
  2081
  @{thm fact}                             - singleton fact (with attributes)
wenzelm@27519
  2082
  @{thms fact}                            - general fact (with attributes)
wenzelm@27519
  2083
  @{lemma prop by method}                 - singleton goal
wenzelm@27519
  2084
  @{lemma prop by meth1 meth2}            - singleton goal
wenzelm@27519
  2085
  @{lemma prop1 ... propN by method}      - general goal
wenzelm@27519
  2086
  @{lemma prop1 ... propN by meth1 meth2} - general goal
wenzelm@27519
  2087
  @{lemma (open) ...}                     - open derivation
wenzelm@27380
  2088
wenzelm@27246
  2089
wenzelm@27979
  2090
*** System ***
wenzelm@27979
  2091
wenzelm@28248
  2092
* The Isabelle "emacs" tool provides a specific interface to invoke
wenzelm@28248
  2093
Proof General / Emacs, with more explicit failure if that is not
wenzelm@28248
  2094
installed (the old isabelle-interface script silently falls back on
wenzelm@28248
  2095
isabelle-process).  The PROOFGENERAL_HOME setting determines the
wenzelm@28248
  2096
installation location of the Proof General distribution.
wenzelm@28248
  2097
wenzelm@27979
  2098
* Isabelle/lib/classes/Pure.jar provides basic support to integrate
wenzelm@27979
  2099
the Isabelle process into a JVM/Scala application.  See
wenzelm@27979
  2100
Isabelle/lib/jedit/plugin for a minimal example.  (The obsolete Java
wenzelm@27979
  2101
process wrapper has been discontinued.)
wenzelm@27979
  2102
wenzelm@30845
  2103
* Added homegrown Isabelle font with unicode layout, see lib/fonts.
wenzelm@30845
  2104
wenzelm@30845
  2105
* Various status messages (with exact source position information) are
wenzelm@27979
  2106
emitted, if proper markup print mode is enabled.  This allows
wenzelm@27979
  2107
user-interface components to provide detailed feedback on internal
wenzelm@27979
  2108
prover operations.
wenzelm@27979
  2109
wenzelm@27979
  2110
wenzelm@27143
  2111
wenzelm@27008
  2112
New in Isabelle2008 (June 2008)
wenzelm@27008
  2113
-------------------------------
wenzelm@25464
  2114
wenzelm@25522
  2115
*** General ***
wenzelm@25522
  2116
wenzelm@27061
  2117
* The Isabelle/Isar Reference Manual (isar-ref) has been reorganized
wenzelm@27061
  2118
and updated, with formally checked references as hyperlinks.
wenzelm@27061
  2119
wenzelm@25994
  2120
* Theory loader: use_thy (and similar operations) no longer set the
wenzelm@25994
  2121
implicit ML context, which was occasionally hard to predict and in
wenzelm@25994
  2122
conflict with concurrency.  INCOMPATIBILITY, use ML within Isar which
wenzelm@25994
  2123
provides a proper context already.
wenzelm@25994
  2124
wenzelm@26323
  2125
* Theory loader: old-style ML proof scripts being *attached* to a thy
wenzelm@26323
  2126
file are no longer supported.  INCOMPATIBILITY, regular 'uses' and
wenzelm@26323
  2127
'use' within a theory file will do the job.
wenzelm@26323
  2128
wenzelm@26650
  2129
* Name space merge now observes canonical order, i.e. the second space
wenzelm@26650
  2130
is inserted into the first one, while existing entries in the first
wenzelm@26659
  2131
space take precedence.  INCOMPATIBILITY in rare situations, may try to
wenzelm@26650
  2132
swap theory imports.
wenzelm@26650
  2133
wenzelm@27067
  2134
* Syntax: symbol \<chi> is now considered a letter.  Potential
wenzelm@27067
  2135
INCOMPATIBILITY in identifier syntax etc.
wenzelm@27067
  2136
wenzelm@27067
  2137
* Outer syntax: string tokens no longer admit escaped white space,
wenzelm@27067
  2138
which was an accidental (undocumented) feature.  INCOMPATIBILITY, use
wenzelm@27067
  2139
white space without escapes.
wenzelm@27067
  2140
wenzelm@27067
  2141
* Outer syntax: string tokens may contain arbitrary character codes
wenzelm@27067
  2142
specified via 3 decimal digits (as in SML).  E.g. "foo\095bar" for
wenzelm@27067
  2143
"foo_bar".
wenzelm@27067
  2144
wenzelm@25522
  2145
haftmann@25502
  2146
*** Pure ***
haftmann@25502
  2147
wenzelm@26718
  2148
* Context-dependent token translations.  Default setup reverts locally
wenzelm@26718
  2149
fixed variables, and adds hilite markup for undeclared frees.
wenzelm@26718
  2150
berghofe@26681
  2151
* Unused theorems can be found using the new command 'unused_thms'.
berghofe@26681
  2152
There are three ways of invoking it:
berghofe@26681
  2153
berghofe@26681
  2154
(1) unused_thms
berghofe@26681
  2155
     Only finds unused theorems in the current theory.
berghofe@26681
  2156
berghofe@26681
  2157
(2) unused_thms thy_1 ... thy_n -
berghofe@26681
  2158
     Finds unused theorems in the current theory and all of its ancestors,
berghofe@26681
  2159
     excluding the theories thy_1 ... thy_n and all of their ancestors.
berghofe@26681
  2160
berghofe@26681
  2161
(3) unused_thms thy_1 ... thy_n - thy'_1 ... thy'_m
berghofe@26681
  2162
     Finds unused theorems in the theories thy'_1 ... thy'_m and all of
berghofe@26681
  2163
     their ancestors, excluding the theories thy_1 ... thy_n and all of
berghofe@26681
  2164
     their ancestors.
berghofe@26681
  2165
wenzelm@26718
  2166
In order to increase the readability of the list produced by
wenzelm@26718
  2167
unused_thms, theorems that have been created by a particular instance
wenzelm@26874
  2168
of a theory command such as 'inductive' or 'function' are considered
wenzelm@26874
  2169
to belong to the same "group", meaning that if at least one theorem in
wenzelm@26718
  2170
this group is used, the other theorems in the same group are no longer
wenzelm@26718
  2171
reported as unused.  Moreover, if all theorems in the group are
wenzelm@26718
  2172
unused, only one theorem in the group is displayed.
wenzelm@26718
  2173
wenzelm@26718
  2174
Note that proof objects have to be switched on in order for
wenzelm@26718
  2175
unused_thms to work properly (i.e. !proofs must be >= 1, which is
wenzelm@26874
  2176
usually the case when using Proof General with the default settings).
berghofe@26681
  2177
wenzelm@26650
  2178
* Authentic naming of facts disallows ad-hoc overwriting of previous
wenzelm@26650
  2179
theorems within the same name space.  INCOMPATIBILITY, need to remove
wenzelm@26650
  2180
duplicate fact bindings, or even accidental fact duplications.  Note
wenzelm@26650
  2181
that tools may maintain dynamically scoped facts systematically, using
wenzelm@26650
  2182
PureThy.add_thms_dynamic.
wenzelm@26650
  2183
wenzelm@26660
  2184
* Command 'hide' now allows to hide from "fact" name space as well.
wenzelm@26660
  2185
wenzelm@26496
  2186
* Eliminated destructive theorem database, simpset, claset, and
wenzelm@26496
  2187
clasimpset.  Potential INCOMPATIBILITY, really need to observe linear
wenzelm@26496
  2188
update of theories within ML code.
wenzelm@26479
  2189
wenzelm@26955
  2190
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm@26955
  2191
INCOMPATIBILITY, object-logics depending on former Pure require
wenzelm@26955
  2192
additional setup PureThy.old_appl_syntax_setup; object-logics
wenzelm@26955
  2193
depending on former CPure need to refer to Pure.
wenzelm@26650
  2194
wenzelm@26495
  2195
* Commands 'use' and 'ML' are now purely functional, operating on
wenzelm@26479
  2196
theory/local_theory.  Removed former 'ML_setup' (on theory), use 'ML'
wenzelm@26479
  2197
instead.  Added 'ML_val' as mere diagnostic replacement for 'ML'.
wenzelm@26479
  2198
INCOMPATIBILITY.
wenzelm@26479
  2199
wenzelm@26874
  2200
* Command 'setup': discontinued implicit version with ML reference.
wenzelm@26434
  2201
wenzelm@25970
  2202
* Instantiation target allows for simultaneous specification of class
wenzelm@25970
  2203
instance operations together with an instantiation proof.
wenzelm@25970
  2204
Type-checking phase allows to refer to class operations uniformly.
wenzelm@27067
  2205
See src/HOL/Complex/Complex.thy for an Isar example and
wenzelm@27067
  2206
src/HOL/Library/Eval.thy for an ML example.
haftmann@25502
  2207
wenzelm@26201
  2208
* Indexing of literal facts: be more serious about including only
wenzelm@26201
  2209
facts from the visible specification/proof context, but not the
wenzelm@26201
  2210
background context (locale etc.).  Affects `prop` notation and method
wenzelm@26201
  2211
"fact".  INCOMPATIBILITY: need to name facts explicitly in rare
wenzelm@26201
  2212
situations.
wenzelm@26201
  2213
wenzelm@26925
  2214
* Method "cases", "induct", "coinduct": removed obsolete/undocumented
wenzelm@26925
  2215
"(open)" option, which used to expose internal bound variables to the
wenzelm@26925
  2216
proof text.
wenzelm@26925
  2217
wenzelm@26925
  2218
* Isar statements: removed obsolete case "rule_context".
wenzelm@26925
  2219
INCOMPATIBILITY, better use explicit fixes/assumes.
wenzelm@26925
  2220
wenzelm@26874
  2221
* Locale proofs: default proof step now includes 'unfold_locales';
wenzelm@26874
  2222
hence 'proof' without argument may be used to unfold locale
wenzelm@26874
  2223
predicates.
ballarin@26765
  2224
ballarin@26765
  2225
haftmann@26762
  2226
*** Document preparation ***
haftmann@26762
  2227
wenzelm@26914
  2228
* Simplified pdfsetup.sty: color/hyperref is used unconditionally for
wenzelm@26914
  2229
both pdf and dvi (hyperlinks usually work in xdvi as well); removed
wenzelm@26914
  2230
obsolete thumbpdf setup (contemporary PDF viewers do this on the
wenzelm@26914
  2231
spot); renamed link color from "darkblue" to "linkcolor" (default
wenzelm@26920
  2232
value unchanged, can be redefined via \definecolor); no longer sets
wenzelm@26920
  2233
"a4paper" option (unnecessary or even intrusive).
wenzelm@26914
  2234
wenzelm@27008
  2235
* Antiquotation @{lemma A method} proves proposition A by the given
wenzelm@27008
  2236
method (either a method name or a method name plus (optional) method
wenzelm@27008
  2237
arguments in parentheses) and prints A just like @{prop A}.
haftmann@26762
  2238
haftmann@26762
  2239
wenzelm@25464
  2240
*** HOL ***
wenzelm@25464
  2241
wenzelm@27067
  2242
* New primrec package.  Specification syntax conforms in style to
wenzelm@27067
  2243
definition/function/....  No separate induction rule is provided.  The
wenzelm@27067
  2244
"primrec" command distinguishes old-style and new-style specifications
wenzelm@27067
  2245
by syntax.  The former primrec package is now named OldPrimrecPackage.
wenzelm@27067
  2246
When adjusting theories, beware: constants stemming from new-style
wenzelm@27067
  2247
primrec specifications have authentic syntax.
wenzelm@27067
  2248
wenzelm@27067
  2249
* Metis prover is now an order of magnitude faster, and also works
wenzelm@27067
  2250
with multithreading.
wenzelm@27067
  2251
wenzelm@27067
  2252
* Metis: the maximum number of clauses that can be produced from a
wenzelm@27067
  2253
theorem is now given by the attribute max_clauses.  Theorems that
wenzelm@27067
  2254
exceed this number are ignored, with a warning printed.
wenzelm@27067
  2255
wenzelm@27067
  2256
* Sledgehammer no longer produces structured proofs by default. To
wenzelm@27067
  2257
enable, declare [[sledgehammer_full = true]].  Attributes
wenzelm@27067
  2258
reconstruction_modulus, reconstruction_sorts renamed
wenzelm@27067
  2259
sledgehammer_modulus, sledgehammer_sorts.  INCOMPATIBILITY.
wenzelm@27067
  2260
haftmann@27104
  2261
* Method "induct_scheme" derives user-specified induction rules
wenzelm@27067
  2262
from well-founded induction and completeness of patterns. This factors
wenzelm@27067
  2263
out some operations that are done internally by the function package
wenzelm@27067
  2264
and makes them available separately.  See
wenzelm@27067
  2265
src/HOL/ex/Induction_Scheme.thy for examples.
wenzelm@27067
  2266
wenzelm@27067
  2267
* More flexible generation of measure functions for termination
wenzelm@27067
  2268
proofs: Measure functions can be declared by proving a rule of the
wenzelm@27067
  2269
form "is_measure f" and giving it the [measure_function] attribute.
wenzelm@27067
  2270
The "is_measure" predicate is logically meaningless (always true), and
wenzelm@27067
  2271
just guides the heuristic.  To find suitable measure functions, the
wenzelm@27067
  2272
termination prover sets up the goal "is_measure ?f" of the appropriate
wenzelm@27067
  2273
type and generates all solutions by prolog-style backwards proof using
wenzelm@27067
  2274
the declared rules.
wenzelm@27067
  2275
wenzelm@27067
  2276
This setup also deals with rules like 
wenzelm@27067
  2277
wenzelm@27067
  2278
  "is_measure f ==> is_measure (list_size f)"
wenzelm@27067
  2279
wenzelm@27067
  2280
which accommodates nested datatypes that recurse through lists.
wenzelm@27067
  2281
Similar rules are predeclared for products and option types.
wenzelm@27067
  2282
berghofe@26964
  2283
* Turned the type of sets "'a set" into an abbreviation for "'a => bool"
berghofe@26964
  2284
berghofe@26964
  2285
  INCOMPATIBILITIES:
berghofe@26964
  2286
wenzelm@27008
  2287
  - Definitions of overloaded constants on sets have to be replaced by
wenzelm@27008
  2288
    definitions on => and bool.
berghofe@26964
  2289
berghofe@26964
  2290
  - Some definitions of overloaded operators on sets can now be proved
wenzelm@27008
  2291
    using the definitions of the operators on => and bool.  Therefore,
wenzelm@27008
  2292
    the following theorems have been renamed:
berghofe@26964
  2293
berghofe@26964
  2294
      subset_def   -> subset_eq
berghofe@26964
  2295
      psubset_def  -> psubset_eq
berghofe@26964
  2296
      set_diff_def -> set_diff_eq
berghofe@26964
  2297
      Compl_def    -> Compl_eq
berghofe@26964
  2298
      Sup_set_def  -> Sup_set_eq
berghofe@26964
  2299
      Inf_set_def  -> Inf_set_eq
berghofe@26964
  2300
      sup_set_def  -> sup_set_eq
berghofe@26964
  2301
      inf_set_def  -> inf_set_eq
berghofe@26964
  2302
berghofe@26964
  2303
  - Due to the incompleteness of the HO unification algorithm, some
berghofe@26964
  2304
    rules such as subst may require manual instantiation, if some of
berghofe@26964
  2305
    the unknowns in the rule is a set.
berghofe@26964
  2306
berghofe@26964
  2307
  - Higher order unification and forward proofs:
berghofe@26964
  2308
    The proof pattern
berghofe@26964
  2309
berghofe@26964
  2310
      have "P (S::'a set)" <...>
berghofe@26964
  2311
      then have "EX S. P S" ..
berghofe@26964
  2312
wenzelm@27008
  2313
    no longer works (due to the incompleteness of the HO unification
wenzelm@27008
  2314
    algorithm) and must be replaced by the pattern
berghofe@26964
  2315
berghofe@26964
  2316
      have "EX S. P S"
berghofe@26964
  2317
      proof
berghofe@26964
  2318
        show "P S" <...>
berghofe@26964
  2319
      qed
berghofe@26964
  2320
berghofe@26964
  2321
  - Calculational reasoning with subst (or similar rules):
berghofe@26964
  2322
    The proof pattern
berghofe@26964
  2323
berghofe@26964
  2324
      have "P (S::'a set)" <...>
berghofe@26964
  2325
      also have "S = T" <...>
berghofe@26964
  2326
      finally have "P T" .
berghofe@26964
  2327
wenzelm@27008
  2328
    no longer works (for similar reasons as the previous example) and
wenzelm@27008
  2329
    must be replaced by something like
berghofe@26964
  2330
berghofe@26964
  2331
      have "P (S::'a set)" <...>
berghofe@26964
  2332
      moreover have "S = T" <...>
berghofe@26964
  2333
      ultimately have "P T" by simp
berghofe@26964
  2334
berghofe@26964
  2335
  - Tactics or packages written in ML code:
berghofe@26964
  2336
    Code performing pattern matching on types via
berghofe@26964
  2337
berghofe@26964
  2338
      Type ("set", [T]) => ...
berghofe@26964
  2339
wenzelm@27008
  2340
    must be rewritten. Moreover, functions like strip_type or
wenzelm@27008
  2341
    binder_types no longer return the right value when applied to a
wenzelm@27008
  2342
    type of the form
berghofe@26964
  2343
berghofe@26964
  2344
      T1 => ... => Tn => U => bool
berghofe@26964
  2345
berghofe@26964
  2346
    rather than
berghofe@26964
  2347
berghofe@26964
  2348
      T1 => ... => Tn => U set
berghofe@26964
  2349
wenzelm@26874
  2350
* Merged theories Wellfounded_Recursion, Accessible_Part and
wenzelm@27067
  2351
Wellfounded_Relations to theory Wellfounded.
krauss@26748
  2352
haftmann@26513
  2353
* Explicit class "eq" for executable equality.  INCOMPATIBILITY.
haftmann@26513
  2354
wenzelm@26874
  2355
* Class finite no longer treats UNIV as class parameter.  Use class
wenzelm@26874
  2356
enum from theory Library/Enum instead to achieve a similar effect.
haftmann@26445
  2357
INCOMPATIBILITY.
haftmann@26445
  2358
wenzelm@26874
  2359
* Theory List: rule list_induct2 now has explicitly named cases "Nil"
wenzelm@26874
  2360
and "Cons".  INCOMPATIBILITY.
wenzelm@26874
  2361
wenzelm@26422
  2362
* HOL (and FOL): renamed variables in rules imp_elim and swap.
wenzelm@26422
  2363
Potential INCOMPATIBILITY.
wenzelm@26422
  2364
wenzelm@26874
  2365
* Theory Product_Type: duplicated lemmas split_Pair_apply and
wenzelm@26874
  2366
injective_fst_snd removed, use split_eta and prod_eqI instead.
wenzelm@26874
  2367
Renamed upd_fst to apfst and upd_snd to apsnd.  INCOMPATIBILITY.
haftmann@26355
  2368
wenzelm@26335
  2369
* Theory Nat: removed redundant lemmas that merely duplicate lemmas of
wenzelm@26335
  2370
the same name in theory Orderings:
wenzelm@26335
  2371
wenzelm@26335
  2372
  less_trans
wenzelm@26335
  2373
  less_linear
wenzelm@26335
  2374
  le_imp_less_or_eq
wenzelm@26335
  2375
  le_less_trans
wenzelm@26335
  2376
  less_le_trans
wenzelm@26335
  2377
  less_not_sym
wenzelm@26335
  2378
  less_asym
wenzelm@26335
  2379
wenzelm@26335
  2380
Renamed less_imp_le to less_imp_le_nat, and less_irrefl to
wenzelm@26335
  2381
less_irrefl_nat.  Potential INCOMPATIBILITY due to more general types
wenzelm@26335
  2382
and different variable names.
wenzelm@26315
  2383
haftmann@26231
  2384
* Library/Option_ord.thy: Canonical order on option type.
haftmann@26231
  2385
wenzelm@27008
  2386
* Library/RBT.thy: Red-black trees, an efficient implementation of
wenzelm@27008
  2387
finite maps.
krauss@26197
  2388
haftmann@26231
  2389
* Library/Countable.thy: Type class for countable types.
haftmann@26231
  2390
wenzelm@26180
  2391
* Theory Int: The representation of numerals has changed.  The infix
wenzelm@26180
  2392
operator BIT and the bit datatype with constructors B0 and B1 have
wenzelm@26180
  2393
disappeared.  INCOMPATIBILITY, use "Int.Bit0 x" and "Int.Bit1 y" in
wenzelm@26180
  2394
place of "x BIT bit.B0" and "y BIT bit.B1", respectively.  Theorems
wenzelm@26180
  2395
involving BIT, B0, or B1 have been renamed with "Bit0" or "Bit1"
wenzelm@26180
  2396
accordingly.
wenzelm@26180
  2397
wenzelm@26180
  2398
* Theory Nat: definition of <= and < on natural numbers no longer
wenzelm@26180
  2399
depend on well-founded relations.  INCOMPATIBILITY.  Definitions
wenzelm@26180
  2400
le_def and less_def have disappeared.  Consider lemmas not_less
wenzelm@26180
  2401
[symmetric, where ?'a = nat] and less_eq [symmetric] instead.
wenzelm@26180
  2402
wenzelm@26180
  2403
* Theory Finite_Set: locales ACf, ACe, ACIf, ACIfSL and ACIfSLlin
wenzelm@26180
  2404
(whose purpose mainly is for various fold_set functionals) have been
wenzelm@26874
  2405
abandoned in favor of the existing algebraic classes
wenzelm@26180
  2406
ab_semigroup_mult, comm_monoid_mult, ab_semigroup_idem_mult,
wenzelm@26180
  2407
lower_semilattice (resp. upper_semilattice) and linorder.
haftmann@26139
  2408
INCOMPATIBILITY.
haftmann@26041
  2409
wenzelm@26180
  2410
* Theory Transitive_Closure: induct and cases rules now declare proper
wenzelm@26180
  2411
case_names ("base" and "step").  INCOMPATIBILITY.
wenzelm@26180
  2412
wenzelm@26180
  2413
* Theorem Inductive.lfp_ordinal_induct generalized to complete
wenzelm@26180
  2414
lattices.  The form set-specific version is available as
wenzelm@26180
  2415
Inductive.lfp_ordinal_induct_set.
haftmann@26013
  2416
wenzelm@26874
  2417
* Renamed theorems "power.simps" to "power_int.simps".
wenzelm@27067
  2418
INCOMPATIBILITY.
haftmann@25961
  2419
wenzelm@26180
  2420
* Class semiring_div provides basic abstract properties of semirings
haftmann@25942
  2421
with division and modulo operations.  Subsumes former class dvd_mod.
haftmann@25942
  2422
wenzelm@26180
  2423
* Merged theories IntDef, Numeral and IntArith into unified theory
wenzelm@26180
  2424
Int.  INCOMPATIBILITY.
wenzelm@26180
  2425
wenzelm@26180
  2426
* Theory Library/Code_Index: type "index" now represents natural
wenzelm@26180
  2427
numbers rather than integers.  INCOMPATIBILITY.
wenzelm@26180
  2428
wenzelm@26180
  2429
* New class "uminus" with operation "uminus" (split of from class
wenzelm@26180
  2430
"minus" which now only has operation "minus", binary).
haftmann@25919
  2431
INCOMPATIBILITY.
haftmann@25919
  2432
wenzelm@25522
  2433
* Constants "card", "internal_split", "option_map" now with authentic
haftmann@25919
  2434
syntax.  INCOMPATIBILITY.
wenzelm@25522
  2435
wenzelm@25522
  2436
* Definitions subset_def, psubset_def, set_diff_def, Compl_def,
wenzelm@25522
  2437
le_bool_def, less_bool_def, le_fun_def, less_fun_def, inf_bool_def,
wenzelm@25522
  2438
sup_bool_def, Inf_bool_def, Sup_bool_def, inf_fun_def, sup_fun_def,
wenzelm@25522
  2439
Inf_fun_def, Sup_fun_def, inf_set_def, sup_set_def, Inf_set_def,
wenzelm@25522
  2440
Sup_set_def, le_def, less_def, option_map_def now with object
haftmann@25919
  2441
equality.  INCOMPATIBILITY.
wenzelm@25464
  2442
schirmer@25705
  2443
* Records. Removed K_record, and replaced it by pure lambda term
wenzelm@25726
  2444
%x. c. The simplifier setup is now more robust against eta expansion.
schirmer@25705
  2445
INCOMPATIBILITY: in cases explicitly referring to K_record.
wenzelm@25464
  2446
wenzelm@27067
  2447
* Library/Multiset: {#a, b, c#} abbreviates {#a#} + {#b#} + {#c#}.
wenzelm@27067
  2448
wenzelm@27067
  2449
* Library/ListVector: new theory of arithmetic vector operations.
wenzelm@27067
  2450
wenzelm@27067
  2451
* Library/Order_Relation: new theory of various orderings as sets of
wenzelm@27067
  2452
pairs.  Defines preorders, partial orders, linear orders and
wenzelm@27067
  2453
well-orders on sets and on types.
krauss@26877
  2454
wenzelm@25726
  2455
krauss@26197
  2456
*** ZF ***
krauss@26197
  2457
wenzelm@26874
  2458
* Renamed some theories to allow to loading both ZF and HOL in the
wenzelm@26874
  2459
same session:
wenzelm@26874
  2460
wenzelm@26874
  2461
  Datatype  -> Datatype_ZF
wenzelm@26874
  2462
  Inductive -> Inductive_ZF
wenzelm@26874
  2463
  Int       -> Int_ZF
wenzelm@26874
  2464
  IntDiv    -> IntDiv_ZF
wenzelm@26874
  2465
  Nat       -> Nat_ZF
wenzelm@26874
  2466
  List      -> List_ZF
wenzelm@26874
  2467
  Main      -> Main_ZF
wenzelm@26874
  2468
wenzelm@26874
  2469
INCOMPATIBILITY: ZF theories that import individual theories below
wenzelm@26874
  2470
Main might need to be adapted.  Regular theory Main is still
wenzelm@26874
  2471
available, as trivial extension of Main_ZF.
krauss@26197
  2472
krauss@26197
  2473
wenzelm@25737
  2474
*** ML ***
wenzelm@25737
  2475
wenzelm@27067
  2476
* ML within Isar: antiquotation @{const name} or @{const
wenzelm@27067
  2477
name(typargs)} produces statically-checked Const term.
wenzelm@27067
  2478
wenzelm@26401
  2479
* Functor NamedThmsFun: data is available to the user as dynamic fact
wenzelm@26724
  2480
(of the same name).  Removed obsolete print command.
wenzelm@26401
  2481
wenzelm@27067
  2482
* Removed obsolete "use_legacy_bindings" function.
wenzelm@26188
  2483
wenzelm@25737
  2484
* The ``print mode'' is now a thread-local value derived from a global
wenzelm@25737
  2485
template (the former print_mode reference), thus access becomes
wenzelm@25737
  2486
non-critical.  The global print_mode reference is for session
wenzelm@25737
  2487
management only; user-code should use print_mode_value,
wenzelm@25737
  2488
print_mode_active, PrintMode.setmp etc.  INCOMPATIBILITY.
wenzelm@25737
  2489
wenzelm@26874
  2490
* Functions system/system_out provide a robust way to invoke external
wenzelm@29161
  2491
shell commands, with propagation of interrupts (requires Poly/ML
wenzelm@29161
  2492
5.2.1).  Do not use OS.Process.system etc. from the basis library!
wenzelm@26222
  2493
wenzelm@25737
  2494
wenzelm@25626
  2495
*** System ***
wenzelm@25626
  2496
wenzelm@25971
  2497
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs ---
wenzelm@25971
  2498
in accordance with Proof General 3.7, which prefers GNU emacs.
wenzelm@25970
  2499
wenzelm@25626
  2500
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm@25626
  2501
optional line editor may be specified via ISABELLE_LINE_EDITOR
wenzelm@25626
  2502
setting, the default settings attempt to locate "ledit" and "rlwrap".
wenzelm@25626
  2503
wenzelm@25651
  2504
* isatool browser now works with Cygwin as well, using general
wenzelm@25651
  2505
"javapath" function defined in Isabelle process environment.
wenzelm@25651
  2506
wenzelm@27067
  2507
* YXML notation provides a simple and efficient alternative to
wenzelm@27067
  2508
standard XML transfer syntax.  See src/Pure/General/yxml.ML and
wenzelm@27067
  2509
isatool yxml as described in the Isabelle system manual.
wenzelm@25651
  2510
wenzelm@25652
  2511
* JVM class isabelle.IsabelleProcess (located in Isabelle/lib/classes)
wenzelm@25651
  2512
provides general wrapper for managing an Isabelle process in a robust
wenzelm@25651
  2513
fashion, with ``cooked'' output from stdin/stderr.
wenzelm@25651
  2514
wenzelm@25855
  2515
* Rudimentary Isabelle plugin for jEdit (see Isabelle/lib/jedit),
wenzelm@25855
  2516
based on Isabelle/JVM process wrapper (see Isabelle/lib/classes).
wenzelm@25855
  2517
wenzelm@27067
  2518
* Removed obsolete THIS_IS_ISABELLE_BUILD feature.  NB: the documented
wenzelm@27067
  2519
way of changing the user's settings is via
wenzelm@27067
  2520
ISABELLE_HOME_USER/etc/settings, which is a fully featured bash
wenzelm@27067
  2521
script.
wenzelm@27067
  2522
wenzelm@27067
  2523
* Multithreading.max_threads := 0 refers to the number of actual CPU
wenzelm@27067
  2524
cores of the underlying machine, which is a good starting point for
wenzelm@27067
  2525
optimal performance tuning.  The corresponding usedir option -M allows
wenzelm@27067
  2526
"max" as an alias for "0".  WARNING: does not work on certain versions
wenzelm@27067
  2527
of Mac OS (with Poly/ML 5.1).
wenzelm@27067
  2528
wenzelm@27067
  2529
* isabelle-process: non-ML sessions are run with "nice", to reduce the
wenzelm@27067
  2530
adverse effect of Isabelle flooding interactive front-ends (notably
wenzelm@27067
  2531
ProofGeneral / XEmacs).
wenzelm@27067
  2532
wenzelm@25626
  2533
wenzelm@25464
  2534
wenzelm@25429
  2535
New in Isabelle2007 (November 2007)
wenzelm@25429
  2536
-----------------------------------
wenzelm@17754
  2537
wenzelm@17754
  2538
*** General ***
wenzelm@17754
  2539
wenzelm@22826
  2540
* More uniform information about legacy features, notably a
wenzelm@22826
  2541
warning/error of "Legacy feature: ...", depending on the state of the
wenzelm@23367
  2542
tolerate_legacy_features flag (default true). FUTURE INCOMPATIBILITY:
wenzelm@23367
  2543
legacy features will disappear eventually.
wenzelm@22826
  2544
wenzelm@17918
  2545
* Theory syntax: the header format ``theory A = B + C:'' has been
wenzelm@17918
  2546
discontinued in favour of ``theory A imports B C begin''.  Use isatool
wenzelm@17918
  2547
fixheaders to convert existing theory files.  INCOMPATIBILITY.
wenzelm@17918
  2548
wenzelm@17918
  2549
* Theory syntax: the old non-Isar theory file format has been
wenzelm@17918
  2550
discontinued altogether.  Note that ML proof scripts may still be used
wenzelm@17918
  2551
with Isar theories; migration is usually quite simple with the ML
wenzelm@17918
  2552
function use_legacy_bindings.  INCOMPATIBILITY.
wenzelm@17918
  2553
wenzelm@22871
  2554
* Theory syntax: some popular names (e.g. 'class', 'declaration',
wenzelm@22871
  2555
'fun', 'help', 'if') are now keywords.  INCOMPATIBILITY, use double
wenzelm@22871
  2556
quotes.
wenzelm@19814
  2557
wenzelm@23888
  2558
* Theory loader: be more serious about observing the static theory
wenzelm@23888
  2559
header specifications (including optional directories), but not the
wenzelm@24172
  2560
accidental file locations of previously successful loads.  The strict
wenzelm@24172
  2561
update policy of former update_thy is now already performed by
wenzelm@24172
  2562
use_thy, so the former has been removed; use_thys updates several
wenzelm@24172
  2563
theories simultaneously, just as 'imports' within a theory header
wenzelm@24172
  2564
specification, but without merging the results.  Potential
wenzelm@24172
  2565
INCOMPATIBILITY: may need to refine theory headers and commands
wenzelm@24172
  2566
ROOT.ML which depend on load order.
wenzelm@23888
  2567
wenzelm@23888
  2568
* Theory loader: optional support for content-based file
wenzelm@23888
  2569
identification, instead of the traditional scheme of full physical
wenzelm@23889
  2570
path plus date stamp; configured by the ISABELLE_FILE_IDENT setting
wenzelm@23888
  2571
(cf. the system manual).  The new scheme allows to work with
wenzelm@23888
  2572
non-finished theories in persistent session images, such that source
wenzelm@23888
  2573
files may be moved later on without requiring reloads.
wenzelm@23888
  2574
wenzelm@24187
  2575
* Theory loader: old-style ML proof scripts being *attached* to a thy
wenzelm@24187
  2576
file (with the same base name as the theory) are considered a legacy
wenzelm@24800
  2577
feature, which will disappear eventually. Even now, the theory loader
wenzelm@24800
  2578
no longer maintains dependencies on such files.
wenzelm@24800
  2579
wenzelm@24800
  2580
* Syntax: the scope for resolving ambiguities via type-inference is
wenzelm@24800
  2581
now limited to individual terms, instead of whole simultaneous
wenzelm@24234
  2582
specifications as before. This greatly reduces the complexity of the
wenzelm@24234
  2583
syntax module and improves flexibility by separating parsing and
wenzelm@24234
  2584
type-checking. INCOMPATIBILITY: additional type-constraints (explicit
wenzelm@24234
  2585
'fixes' etc.) are required in rare situations.
wenzelm@24234
  2586
wenzelm@25034
  2587
* Syntax: constants introduced by new-style packages ('definition',
wenzelm@25034
  2588
'abbreviation' etc.) are passed through the syntax module in
wenzelm@25034
  2589
``authentic mode''. This means that associated mixfix annotations
wenzelm@25034
  2590
really stick to such constants, independently of potential name space
wenzelm@25034
  2591
ambiguities introduced later on. INCOMPATIBILITY: constants in parse
wenzelm@25034
  2592
trees are represented slightly differently, may need to adapt syntax
wenzelm@25034
  2593
translations accordingly. Use CONST marker in 'translations' and
wenzelm@25034
  2594
@{const_syntax} antiquotation in 'parse_translation' etc.
wenzelm@25034
  2595
wenzelm@17981
  2596
* Legacy goal package: reduced interface to the bare minimum required
wenzelm@17981
  2597
to keep existing proof scripts running.  Most other user-level
wenzelm@17981
  2598
functions are now part of the OldGoals structure, which is *not* open
wenzelm@17981
  2599
by default (consider isatool expandshort before open OldGoals).
wenzelm@17981
  2600
Removed top_sg, prin, printyp, pprint_term/typ altogether, because
wenzelm@17981
  2601
these tend to cause confusion about the actual goal (!) context being
wenzelm@17981
  2602
used here, which is not necessarily the same as the_context().
wenzelm@17918
  2603
wenzelm@23379
  2604
* Command 'find_theorems': supports "*" wild-card in "name:"
wenzelm@23379
  2605
criterion; "with_dups" option.  Certain ProofGeneral versions might
wenzelm@23379
  2606
support a specific search form (see ProofGeneral/CHANGES).
webertj@22965
  2607
wenzelm@20370
  2608
* The ``prems limit'' option (cf. ProofContext.prems_limit) is now -1
wenzelm@20370
  2609
by default, which means that "prems" (and also "fixed variables") are
wenzelm@20370
  2610
suppressed from proof state output.  Note that the ProofGeneral
wenzelm@20370
  2611
settings mechanism allows to change and save options persistently, but
wenzelm@20370
  2612
older versions of Isabelle will fail to start up if a negative prems
wenzelm@20370
  2613
limit is imposed.
wenzelm@20370
  2614
wenzelm@21308
  2615
* Local theory targets may be specified by non-nested blocks of
wenzelm@21308
  2616
``context/locale/class ... begin'' followed by ``end''.  The body may
wenzelm@21308
  2617
contain definitions, theorems etc., including any derived mechanism
wenzelm@21308
  2618
that has been implemented on top of these primitives.  This concept
wenzelm@21308
  2619
generalizes the existing ``theorem (in ...)'' towards more versatility
wenzelm@21308
  2620
and scalability.
wenzelm@21308
  2621
wenzelm@21960
  2622
* Proof General interface: proper undo of final 'end' command;
wenzelm@21960
  2623
discontinued Isabelle/classic mode (ML proof scripts).
wenzelm@21960
  2624
wenzelm@17754
  2625
wenzelm@17865
  2626
*** Document preparation ***
wenzelm@17865
  2627
wenzelm@21717
  2628
* Added antiquotation @{theory name} which prints the given name,
wenzelm@21717
  2629
after checking that it refers to a valid ancestor theory in the
wenzelm@21717
  2630
current context.
haftmann@21339
  2631
wenzelm@17869
  2632
* Added antiquotations @{ML_type text} and @{ML_struct text} which
wenzelm@17869
  2633
check the given source text as ML type/st