NEWS
author blanchet
Sun May 01 18:37:25 2011 +0200 (2011-05-01)
changeset 42582 6321d0dc3d72
parent 42514 f32500b4bc23
child 42633 f86467c5a72c
permissions -rw-r--r--
document new type system syntax
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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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* Theory loader: source files are identified by content via SHA1
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digests.  Discontinued former path/modtime identification and optional
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ISABELLE_FILE_IDENT plugin scripts.
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* Parallelization of nested Isar proofs is subject to
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Goal.parallel_proofs_threshold (default 100).  See also isabelle
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usedir option -Q.
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* Discontinued support for Poly/ML 5.2, which was the last version
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without proper multithreading and TimeLimit implementation.
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* Discontinued old lib/scripts/polyml-platform, which has been
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obsolete since Isabelle2009-2.
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* Theory loader: source files are exclusively located via the master
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directory of each theory node (where the .thy file itself resides).
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The global load path (such as src/HOL/Library) is has been
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discontinued.  INCOMPATIBILITY.
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* Various optional external tools are referenced more robustly and
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uniformly by explicit Isabelle settings as follows:
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  ISABELLE_CSDP   (formerly CSDP_EXE)
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  ISABELLE_GHC    (formerly EXEC_GHC or GHC_PATH)
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  ISABELLE_OCAML  (formerly EXEC_OCAML)
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  ISABELLE_SWIPL  (formerly EXEC_SWIPL)
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  ISABELLE_YAP    (formerly EXEC_YAP)
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Note that automated detection from the file-system or search path has
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been discontinued.  INCOMPATIBILITY.
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* Name space: proper configuration options "long_names",
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"short_names", "unique_names" instead of former unsynchronized
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references.  Minor INCOMPATIBILITY, need to declare options in context
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like this:
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  declare [[unique_names = false]]
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* Literal facts `prop` may contain dummy patterns, e.g. `_ = _`.  Note
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that the result needs to be unique, which means fact specifications
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may have to be refined after enriching a proof context.
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*** HOL ***
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* Nitpick:
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  - Added "need" and "total_consts" options.
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  - Reintroduced "show_skolems" option by popular demand.
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  - Renamed attribute: nitpick_def ~> nitpick_unfold.
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    INCOMPATIBILITY.
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* Sledgehammer:
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  - sledgehammer available_provers ~> sledgehammer supported_provers
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    INCOMPATIBILITY.
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  - Added support for SNARK and ToFoF-E on SystemOnTPTP and for simply typed
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    TPTP problems (TFF).
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  - Added "type_sys" and "monomorphize_limit" options.
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* "try":
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  - Added "simp:", "intro:", and "elim:" options.
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* Quickcheck:
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  - Added "eval" option to evaluate terms for the found counterexample
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    (currently only supported by the default (exhaustive) tester)
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  - Added post-processing of terms to obtain readable counterexamples
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    (currently only supported by the default (exhaustive) tester)
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* Function package: discontinued option "tailrec".
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INCOMPATIBILITY. Use partial_function instead.
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* HOL-Probability:
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  - Caratheodory's extension lemma is now proved for ring_of_sets.
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  - Infinite products of probability measures are now available.
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  - Use extended reals instead of positive extended reals.
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    INCOMPATIBILITY.
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*** Document preparation ***
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* Localized \isabellestyle switch can be used within blocks or groups
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like this:
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  \isabellestyle{it}  %preferred default
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  {\isabellestylett @{text "typewriter stuff"}}
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* New term style "isub" as ad-hoc conversion of variables x1, y23 into
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subscripted form x\<^isub>1, y\<^isub>2\<^isub>3.
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* Predefined LaTeX macros for Isabelle symbols \<bind> and \<then>
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(e.g. see ~~/src/HOL/Library/Monad_Syntax.thy).
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*** ML ***
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* Structure Proof_Context follows standard naming scheme.  Old
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ProofContext is still available for some time as legacy alias.
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* Structure Timing provides various operations for timing; supersedes
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former start_timing/end_timing etc.
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* Path.print is the official way to show file-system paths to users
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(including quotes etc.).
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* Inner syntax: identifiers in parse trees of generic categories
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"logic", "aprop", "idt" etc. carry position information (disguised as
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type constraints).  Occasional INCOMPATIBILITY with non-compliant
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translations that choke on unexpected type constraints.  Positions can
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be stripped in ML translations via Syntax.strip_positions /
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Syntax.strip_positions_ast, or via the syntax constant
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"_strip_positions" within parse trees.  As last resort, positions can
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be disabled via the configuration option Syntax.positions, which is
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called "syntax_positions" in Isar attribute syntax.
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* Discontinued special status of various ML structures that contribute
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to structure Syntax (Ast, Lexicon, Mixfix, Parser, Printer etc.): less
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pervasive content, no inclusion in structure Syntax.  INCOMPATIBILITY,
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refer directly to Ast.Constant, Lexicon.is_identifier,
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Syntax_Trans.mk_binder_tr etc.
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* Typed print translation: discontinued show_sorts argument, which is
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already available via context of "advanced" translation.
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* Refined PARALLEL_GOALS tactical: degrades gracefully for schematic
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goal states; body tactic needs to address all subgoals uniformly.
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* Slightly more special eq_list/eq_set, with shortcut involving
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pointer equality (assumes that eq relation is reflexive).
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New in Isabelle2011 (January 2011)
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----------------------------------
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*** General ***
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* Experimental Prover IDE based on Isabelle/Scala and jEdit (see
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src/Tools/jEdit).  This also serves as IDE for Isabelle/ML, with
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useful tooltips and hyperlinks produced from its static analysis.  The
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bundled component provides an executable Isabelle tool that can be run
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like this:
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  Isabelle2011/bin/isabelle jedit
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* Significantly improved Isabelle/Isar implementation manual.
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* System settings: ISABELLE_HOME_USER now includes ISABELLE_IDENTIFIER
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(and thus refers to something like $HOME/.isabelle/Isabelle2011),
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while the default heap location within that directory lacks that extra
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suffix.  This isolates multiple Isabelle installations from each
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other, avoiding problems with old settings in new versions.
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INCOMPATIBILITY, need to copy/upgrade old user settings manually.
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* Source files are always encoded as UTF-8, instead of old-fashioned
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ISO-Latin-1.  INCOMPATIBILITY.  Isabelle LaTeX documents might require
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the following package declarations:
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  \usepackage[utf8]{inputenc}
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  \usepackage{textcomp}
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* Explicit treatment of UTF-8 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 loader: source files are primarily located via the master
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directory of each theory node (where the .thy file itself resides).
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The global load path is still partially available as legacy feature.
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Minor INCOMPATIBILITY due to subtle change in file lookup: use
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explicit paths, relatively to the theory.
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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 or print modes.  There are both ML Config.T
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entities and 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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  show_abbrevs                  show_abbrevs
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  Syntax.ast_trace              syntax_ast_trace
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  Syntax.ast_stat               syntax_ast_stat
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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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  Method.rule_trace             rule_trace
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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 only be
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changed globally at the ROOT session setup, but *not* within a theory.
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The option "show_abbrevs" supersedes the former print mode
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"no_abbrevs" with inverted meaning.
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* More systematic naming of some configuration options.
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INCOMPATIBILITY.
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  trace_simp  ~>  simp_trace
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  debug_simp  ~>  simp_debug
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* Support for real valued configuration options, using simplistic
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floating-point notation that coincides with the inner syntax for
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float_token.
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* Support for real valued preferences (with approximative PGIP type):
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front-ends need to accept "pgint" values in float notation.
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INCOMPATIBILITY.
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* The IsabelleText font now includes Cyrillic, Hebrew, Arabic from
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DejaVu Sans.
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* Discontinued support for Poly/ML 5.0 and 5.1 versions.
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*** Pure ***
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* Command 'type_synonym' (with single argument) replaces somewhat
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outdated 'types', which is still available as legacy feature for some
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time.
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* Command 'nonterminal' (with 'and' separated list of arguments)
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replaces somewhat outdated 'nonterminals'.  INCOMPATIBILITY.
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* Command 'notepad' replaces former 'example_proof' for
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experimentation in Isar without any result.  INCOMPATIBILITY.
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* Locale interpretation commands 'interpret' and 'sublocale' accept
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lists of equations to map definitions in a locale to appropriate
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entities in the context of the interpretation.  The 'interpretation'
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command already provided this functionality.
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* Diagnostic command 'print_dependencies' prints the locale instances
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that would be activated if the specified expression was interpreted in
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the current context.  Variant "print_dependencies!" assumes a context
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without interpretations.
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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 obsolete 'constdefs' command.  INCOMPATIBILITY, use
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'definition' instead.
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* The "prems" fact, which refers to the accidental collection of
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foundational premises in the context, is now explicitly marked as
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legacy feature and will be discontinued soon.  Consider using "assms"
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of the head statement or reference facts by explicit names.
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* Document antiquotations @{class} and @{type} print classes and type
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constructors.
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* Document antiquotation @{file} checks file/directory entries within
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the local file system.
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*** HOL ***
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* Coercive subtyping: functions can be declared as coercions and type
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inference will add them as necessary upon input of a term.  Theory
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Complex_Main declares real :: nat => real and real :: int => real as
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coercions. A coercion function f is declared like this:
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  declare [[coercion f]]
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To lift coercions through type constructors (e.g. from nat => real to
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nat list => real list), map functions can be declared, e.g.
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  declare [[coercion_map map]]
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Currently coercion inference is activated only in theories including
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real numbers, i.e. descendants of Complex_Main.  This is controlled by
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the configuration option "coercion_enabled", e.g. it can be enabled in
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other theories like this:
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  declare [[coercion_enabled]]
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* Command 'partial_function' provides basic support for recursive
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function definitions over complete partial orders.  Concrete instances
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are provided for i) the option type, ii) tail recursion on arbitrary
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types, and iii) the heap monad of Imperative_HOL.  See
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src/HOL/ex/Fundefs.thy and src/HOL/Imperative_HOL/ex/Linked_Lists.thy
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for examples.
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* Function package: f.psimps rules are no longer implicitly declared
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as [simp].  INCOMPATIBILITY.
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* Datatype package: theorems generated for executable equality (class
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"eq") carry proper names and are treated as default code equations.
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* Inductive package: now offers command 'inductive_simps' to
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automatically derive instantiated and simplified equations for
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inductive predicates, similar to 'inductive_cases'.
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* Command 'enriched_type' allows to register properties of the
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functorial structure of types.
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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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* Code generator: Scala (2.8 or higher) has been added to the target
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languages.
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* Code generator: globbing constant expressions "*" and "Theory.*"
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have been replaced by the more idiomatic "_" and "Theory._".
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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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* Code generator: do not print function definitions for case
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combinators any longer.
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* Code generator: simplification with rules determined with
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src/Tools/Code/code_simp.ML and method "code_simp".
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* Code generator for records: more idiomatic representation of record
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types.  Warning: records are not covered by ancient SML code
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generation any longer.  INCOMPATIBILITY.  In cases of need, a suitable
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rep_datatype declaration 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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* Records: logical foundation type for records does not carry a
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'_type' suffix any longer (obsolete due to authentic syntax).
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INCOMPATIBILITY.
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* Quickcheck now by default uses exhaustive testing instead of random
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testing.  Random testing can be invoked by "quickcheck [random]",
wenzelm@41571
   362
exhaustive testing by "quickcheck [exhaustive]".
haftmann@41398
   363
haftmann@41398
   364
* Quickcheck instantiates polymorphic types with small finite
haftmann@41398
   365
datatypes by default. This enables a simple execution mechanism to
haftmann@41398
   366
handle quantifiers and function equality over the finite datatypes.
haftmann@41398
   367
wenzelm@41571
   368
* Quickcheck random generator has been renamed from "code" to
wenzelm@41571
   369
"random".  INCOMPATIBILITY.
haftmann@41398
   370
haftmann@41398
   371
* Quickcheck now has a configurable time limit which is set to 30
haftmann@41398
   372
seconds by default. This can be changed by adding [timeout = n] to the
haftmann@41398
   373
quickcheck command. The time limit for Auto Quickcheck is still set
haftmann@41398
   374
independently.
haftmann@38461
   375
haftmann@38461
   376
* Quickcheck in locales considers interpretations of that locale for
haftmann@38461
   377
counter example search.
haftmann@38461
   378
blanchet@40059
   379
* Sledgehammer:
wenzelm@41571
   380
  - Added "smt" and "remote_smt" provers based on the "smt" proof
wenzelm@41571
   381
    method. See the Sledgehammer manual for details ("isabelle doc
wenzelm@41571
   382
    sledgehammer").
blanchet@40059
   383
  - Renamed commands:
blanchet@40059
   384
    sledgehammer atp_info ~> sledgehammer running_provers
blanchet@40059
   385
    sledgehammer atp_kill ~> sledgehammer kill_provers
blanchet@40059
   386
    sledgehammer available_atps ~> sledgehammer available_provers
blanchet@40059
   387
    INCOMPATIBILITY.
blanchet@40059
   388
  - Renamed options:
blanchet@40059
   389
    sledgehammer [atps = ...] ~> sledgehammer [provers = ...]
blanchet@40062
   390
    sledgehammer [atp = ...] ~> sledgehammer [prover = ...]
blanchet@40341
   391
    sledgehammer [timeout = 77 s] ~> sledgehammer [timeout = 77]
blanchet@40341
   392
    (and "ms" and "min" are no longer supported)
blanchet@40341
   393
    INCOMPATIBILITY.
blanchet@40341
   394
blanchet@40341
   395
* Nitpick:
blanchet@40341
   396
  - Renamed options:
blanchet@40341
   397
    nitpick [timeout = 77 s] ~> nitpick [timeout = 77]
blanchet@40341
   398
    nitpick [tac_timeout = 777 ms] ~> nitpick [tac_timeout = 0.777]
blanchet@40059
   399
    INCOMPATIBILITY.
blanchet@40725
   400
  - Added support for partial quotient types.
blanchet@40725
   401
  - Added local versions of the "Nitpick.register_xxx" functions.
blanchet@40725
   402
  - Added "whack" option.
blanchet@40725
   403
  - Allow registration of quotient types as codatatypes.
blanchet@40725
   404
  - Improved "merge_type_vars" option to merge more types.
blanchet@40725
   405
  - Removed unsound "fast_descrs" option.
blanchet@40725
   406
  - Added custom symmetry breaking for datatypes, making it possible to reach
blanchet@40725
   407
    higher cardinalities.
blanchet@40725
   408
  - Prevent the expansion of too large definitions.
blanchet@39957
   409
wenzelm@41571
   410
* Proof methods "metis" and "meson" now have configuration options
wenzelm@41571
   411
"meson_trace", "metis_trace", and "metis_verbose" that can be enabled
wenzelm@41571
   412
to diagnose these tools. E.g.
wenzelm@41571
   413
wenzelm@41571
   414
    using [[metis_trace = true]]
wenzelm@41571
   415
haftmann@41398
   416
* Auto Solve: Renamed "Auto Solve Direct".  The tool is now available
haftmann@41398
   417
manually as command 'solve_direct'.
haftmann@41398
   418
boehmes@41601
   419
* The default SMT solver Z3 must be enabled explicitly (due to
boehmes@41601
   420
licensing issues) by setting the environment variable
wenzelm@41603
   421
Z3_NON_COMMERCIAL in etc/settings of the component, for example.  For
wenzelm@41603
   422
commercial applications, the SMT solver CVC3 is provided as fall-back;
wenzelm@41603
   423
changing the SMT solver is done via the configuration option
wenzelm@41603
   424
"smt_solver".
boehmes@41432
   425
boehmes@41432
   426
* Remote SMT solvers need to be referred to by the "remote_" prefix,
wenzelm@41571
   427
i.e. "remote_cvc3" and "remote_z3".
wenzelm@41571
   428
wenzelm@41571
   429
* Added basic SMT support for datatypes, records, and typedefs using
wenzelm@41571
   430
the oracle mode (no proofs).  Direct support of pairs has been dropped
wenzelm@41571
   431
in exchange (pass theorems fst_conv snd_conv pair_collapse to the SMT
wenzelm@41571
   432
support for a similar behavior).  Minor INCOMPATIBILITY.
boehmes@41432
   433
boehmes@40162
   434
* Changed SMT configuration options:
boehmes@40162
   435
  - Renamed:
boehmes@41432
   436
    z3_proofs ~> smt_oracle (with inverted meaning)
boehmes@40162
   437
    z3_trace_assms ~> smt_trace_used_facts
boehmes@40162
   438
    INCOMPATIBILITY.
boehmes@40162
   439
  - Added:
boehmes@40424
   440
    smt_verbose
boehmes@41432
   441
    smt_random_seed
boehmes@40424
   442
    smt_datatypes
boehmes@41432
   443
    smt_infer_triggers
boehmes@41432
   444
    smt_monomorph_limit
boehmes@40162
   445
    cvc3_options
boehmes@41432
   446
    remote_cvc3_options
boehmes@41432
   447
    remote_z3_options
boehmes@40162
   448
    yices_options
blanchet@39957
   449
wenzelm@40948
   450
* Boogie output files (.b2i files) need to be declared in the theory
wenzelm@40948
   451
header.
boehmes@40580
   452
wenzelm@41594
   453
* Simplification procedure "list_to_set_comprehension" rewrites list
wenzelm@41594
   454
comprehensions applied to List.set to set comprehensions.  Occasional
wenzelm@41594
   455
INCOMPATIBILITY, may be deactivated like this:
wenzelm@41594
   456
wenzelm@41594
   457
  declare [[simproc del: list_to_set_comprehension]]
wenzelm@41594
   458
wenzelm@41573
   459
* Removed old version of primrec package.  INCOMPATIBILITY.
haftmann@41398
   460
haftmann@41398
   461
* Removed simplifier congruence rule of "prod_case", as has for long
haftmann@41398
   462
been the case with "split".  INCOMPATIBILITY.
haftmann@41398
   463
haftmann@41398
   464
* String.literal is a type, but not a datatype.  INCOMPATIBILITY.
haftmann@41398
   465
krauss@40388
   466
* Removed [split_format ... and ... and ...] version of
krauss@40388
   467
[split_format].  Potential INCOMPATIBILITY.
krauss@40388
   468
wenzelm@41571
   469
* Predicate "sorted" now defined inductively, with nice induction
wenzelm@41571
   470
rules.  INCOMPATIBILITY: former sorted.simps now named sorted_simps.
haftmann@41398
   471
haftmann@41398
   472
* Constant "contents" renamed to "the_elem", to free the generic name
haftmann@41398
   473
contents for other uses.  INCOMPATIBILITY.
haftmann@41398
   474
haftmann@41398
   475
* Renamed class eq and constant eq (for code generation) to class
haftmann@41398
   476
equal and constant equal, plus renaming of related facts and various
haftmann@41398
   477
tuning.  INCOMPATIBILITY.
haftmann@41398
   478
haftmann@41398
   479
* Dropped type classes mult_mono and mult_mono1.  INCOMPATIBILITY.
haftmann@41398
   480
wenzelm@41571
   481
* Removed output syntax "'a ~=> 'b" for "'a => 'b option".
wenzelm@41571
   482
INCOMPATIBILITY.
haftmann@41398
   483
haftmann@41398
   484
* Renamed theory Fset to Cset, type Fset.fset to Cset.set, in order to
haftmann@41398
   485
avoid confusion with finite sets.  INCOMPATIBILITY.
haftmann@41398
   486
haftmann@41398
   487
* Abandoned locales equiv, congruent and congruent2 for equivalence
haftmann@41398
   488
relations.  INCOMPATIBILITY: use equivI rather than equiv_intro (same
haftmann@41398
   489
for congruent(2)).
haftmann@41398
   490
haftmann@41398
   491
* Some previously unqualified names have been qualified:
haftmann@41398
   492
haftmann@41398
   493
  types
haftmann@41398
   494
    bool ~> HOL.bool
haftmann@41398
   495
    nat ~> Nat.nat
haftmann@41398
   496
haftmann@41398
   497
  constants
haftmann@41398
   498
    Trueprop ~> HOL.Trueprop
haftmann@41398
   499
    True ~> HOL.True
haftmann@41398
   500
    False ~> HOL.False
haftmann@41398
   501
    op & ~> HOL.conj
haftmann@41398
   502
    op | ~> HOL.disj
haftmann@41398
   503
    op --> ~> HOL.implies
haftmann@41398
   504
    op = ~> HOL.eq
haftmann@41398
   505
    Not ~> HOL.Not
haftmann@41398
   506
    The ~> HOL.The
haftmann@41398
   507
    All ~> HOL.All
haftmann@41398
   508
    Ex ~> HOL.Ex
haftmann@41398
   509
    Ex1 ~> HOL.Ex1
haftmann@41398
   510
    Let ~> HOL.Let
haftmann@41398
   511
    If ~> HOL.If
haftmann@41398
   512
    Ball ~> Set.Ball
haftmann@41398
   513
    Bex ~> Set.Bex
haftmann@41398
   514
    Suc ~> Nat.Suc
haftmann@41398
   515
    Pair ~> Product_Type.Pair
haftmann@41398
   516
    fst ~> Product_Type.fst
haftmann@41398
   517
    snd ~> Product_Type.snd
haftmann@41398
   518
    curry ~> Product_Type.curry
haftmann@41398
   519
    op : ~> Set.member
haftmann@41398
   520
    Collect ~> Set.Collect
haftmann@41398
   521
haftmann@41398
   522
INCOMPATIBILITY.
haftmann@41398
   523
haftmann@41398
   524
* More canonical naming convention for some fundamental definitions:
haftmann@41398
   525
haftmann@41398
   526
    bot_bool_eq ~> bot_bool_def
haftmann@41398
   527
    top_bool_eq ~> top_bool_def
haftmann@41398
   528
    inf_bool_eq ~> inf_bool_def
haftmann@41398
   529
    sup_bool_eq ~> sup_bool_def
haftmann@41398
   530
    bot_fun_eq  ~> bot_fun_def
haftmann@41398
   531
    top_fun_eq  ~> top_fun_def
haftmann@41398
   532
    inf_fun_eq  ~> inf_fun_def
haftmann@41398
   533
    sup_fun_eq  ~> sup_fun_def
haftmann@41398
   534
haftmann@41398
   535
INCOMPATIBILITY.
haftmann@41398
   536
haftmann@41398
   537
* More stylized fact names:
haftmann@41398
   538
haftmann@41398
   539
  expand_fun_eq ~> fun_eq_iff
haftmann@41398
   540
  expand_set_eq ~> set_eq_iff
haftmann@41398
   541
  set_ext       ~> set_eqI
haftmann@41398
   542
  nat_number    ~> eval_nat_numeral
haftmann@41398
   543
haftmann@41398
   544
INCOMPATIBILITY.
haftmann@41398
   545
wenzelm@41571
   546
* Refactoring of code-generation specific operations in theory List:
haftmann@41398
   547
haftmann@41398
   548
  constants
haftmann@41398
   549
    null ~> List.null
haftmann@41398
   550
haftmann@41398
   551
  facts
haftmann@41398
   552
    mem_iff ~> member_def
haftmann@41398
   553
    null_empty ~> null_def
haftmann@41398
   554
haftmann@41398
   555
INCOMPATIBILITY.  Note that these were not supposed to be used
haftmann@41398
   556
regularly unless for striking reasons; their main purpose was code
haftmann@41398
   557
generation.
haftmann@41398
   558
haftmann@41398
   559
Various operations from the Haskell prelude are used for generating
haftmann@41398
   560
Haskell code.
haftmann@41398
   561
wenzelm@41571
   562
* Term "bij f" is now an abbreviation of "bij_betw f UNIV UNIV".  Term
wenzelm@41571
   563
"surj f" is now an abbreviation of "range f = UNIV".  The theorems
wenzelm@41571
   564
bij_def and surj_def are unchanged.  INCOMPATIBILITY.
haftmann@41398
   565
haftmann@41398
   566
* Abolished some non-alphabetic type names: "prod" and "sum" replace
haftmann@41398
   567
"*" and "+" respectively.  INCOMPATIBILITY.
haftmann@41398
   568
haftmann@41398
   569
* Name "Plus" of disjoint sum operator "<+>" is now hidden.  Write
wenzelm@41571
   570
"Sum_Type.Plus" instead.
haftmann@41398
   571
haftmann@41398
   572
* Constant "split" has been merged with constant "prod_case"; names of
haftmann@41398
   573
ML functions, facts etc. involving split have been retained so far,
haftmann@41398
   574
though.  INCOMPATIBILITY.
haftmann@41398
   575
haftmann@41398
   576
* Dropped old infix syntax "_ mem _" for List.member; use "_ : set _"
haftmann@41398
   577
instead.  INCOMPATIBILITY.
haftmann@41398
   578
wenzelm@41571
   579
* Removed lemma "Option.is_none_none" which duplicates "is_none_def".
haftmann@41398
   580
INCOMPATIBILITY.
haftmann@41398
   581
wenzelm@41594
   582
* Former theory Library/Enum is now part of the HOL-Main image.
wenzelm@41594
   583
INCOMPATIBILITY: all constants of the Enum theory now have to be
wenzelm@41594
   584
referred to by its qualified name.
wenzelm@41594
   585
wenzelm@41594
   586
  enum    ~>  Enum.enum
wenzelm@41594
   587
  nlists  ~>  Enum.nlists
wenzelm@41594
   588
  product ~>  Enum.product
wenzelm@41594
   589
wenzelm@41594
   590
* Theory Library/Monad_Syntax provides do-syntax for monad types.
wenzelm@41594
   591
Syntax in Library/State_Monad has been changed to avoid ambiguities.
wenzelm@41594
   592
INCOMPATIBILITY.
wenzelm@41594
   593
wenzelm@41594
   594
* Theory Library/SetsAndFunctions has been split into
wenzelm@41594
   595
Library/Function_Algebras and Library/Set_Algebras; canonical names
wenzelm@41594
   596
for instance definitions for functions; various improvements.
wenzelm@41594
   597
INCOMPATIBILITY.
wenzelm@41594
   598
wenzelm@41594
   599
* Theory Library/Multiset provides stable quicksort implementation of
wenzelm@41594
   600
sort_key.
wenzelm@41594
   601
wenzelm@41594
   602
* Theory Library/Multiset: renamed empty_idemp ~> empty_neutral.
wenzelm@41594
   603
INCOMPATIBILITY.
wenzelm@41594
   604
wenzelm@41594
   605
* Session Multivariate_Analysis: introduced a type class for euclidean
wenzelm@41594
   606
space.  Most theorems are now stated in terms of euclidean spaces
wenzelm@41594
   607
instead of finite cartesian products.
wenzelm@41594
   608
wenzelm@41594
   609
  types
wenzelm@41594
   610
    real ^ 'n ~>  'a::real_vector
wenzelm@41594
   611
              ~>  'a::euclidean_space
wenzelm@41594
   612
              ~>  'a::ordered_euclidean_space
wenzelm@41594
   613
        (depends on your needs)
wenzelm@41594
   614
wenzelm@41594
   615
  constants
wenzelm@41594
   616
     _ $ _        ~> _ $$ _
wenzelm@41594
   617
     \<chi> x. _  ~> \<chi>\<chi> x. _
wenzelm@41594
   618
     CARD('n)     ~> DIM('a)
wenzelm@41594
   619
wenzelm@41594
   620
Also note that the indices are now natural numbers and not from some
wenzelm@41594
   621
finite type. Finite cartesian products of euclidean spaces, products
wenzelm@41594
   622
of euclidean spaces the real and complex numbers are instantiated to
wenzelm@41594
   623
be euclidean_spaces.  INCOMPATIBILITY.
wenzelm@41594
   624
wenzelm@41594
   625
* Session Probability: introduced pextreal as positive extended real
wenzelm@41594
   626
numbers.  Use pextreal as value for measures.  Introduce the
wenzelm@41594
   627
Radon-Nikodym derivative, product spaces and Fubini's theorem for
wenzelm@41594
   628
arbitrary sigma finite measures.  Introduces Lebesgue measure based on
wenzelm@41594
   629
the integral in Multivariate Analysis.  INCOMPATIBILITY.
wenzelm@41594
   630
wenzelm@41594
   631
* Session Imperative_HOL: revamped, corrected dozens of inadequacies.
wenzelm@41594
   632
INCOMPATIBILITY.
wenzelm@41594
   633
wenzelm@41594
   634
* Session SPARK (with image HOL-SPARK) provides commands to load and
wenzelm@41594
   635
prove verification conditions generated by the SPARK Ada program
wenzelm@41594
   636
verifier.  See also src/HOL/SPARK and src/HOL/SPARK/Examples.
berghofe@41567
   637
huffman@40621
   638
ballarin@41433
   639
*** HOL-Algebra ***
ballarin@41433
   640
ballarin@41433
   641
* Theorems for additive ring operations (locale abelian_monoid and
ballarin@41433
   642
descendants) are generated by interpretation from their multiplicative
ballarin@41434
   643
counterparts.  Names (in particular theorem names) have the mandatory
ballarin@41434
   644
qualifier 'add'.  Previous theorem names are redeclared for
ballarin@41434
   645
compatibility.
ballarin@41434
   646
wenzelm@41571
   647
* Structure "int_ring" is now an abbreviation (previously a
ballarin@41434
   648
definition).  This fits more natural with advanced interpretations.
ballarin@41433
   649
ballarin@41433
   650
huffman@40621
   651
*** HOLCF ***
huffman@40621
   652
huffman@40621
   653
* The domain package now runs in definitional mode by default: The
wenzelm@41571
   654
former command 'new_domain' is now called 'domain'.  To use the domain
huffman@40621
   655
package in its original axiomatic mode, use 'domain (unsafe)'.
huffman@40621
   656
INCOMPATIBILITY.
huffman@40621
   657
wenzelm@41571
   658
* The new class "domain" is now the default sort.  Class "predomain"
wenzelm@41571
   659
is an unpointed version of "domain". Theories can be updated by
wenzelm@41571
   660
replacing sort annotations as shown below.  INCOMPATIBILITY.
huffman@40621
   661
huffman@40621
   662
  'a::type ~> 'a::countable
huffman@40621
   663
  'a::cpo  ~> 'a::predomain
huffman@40621
   664
  'a::pcpo ~> 'a::domain
huffman@40621
   665
wenzelm@41571
   666
* The old type class "rep" has been superseded by class "domain".
huffman@40621
   667
Accordingly, users of the definitional package must remove any
wenzelm@41571
   668
"default_sort rep" declarations.  INCOMPATIBILITY.
huffman@40621
   669
huffman@41401
   670
* The domain package (definitional mode) now supports unpointed
huffman@41401
   671
predomain argument types, as long as they are marked 'lazy'. (Strict
wenzelm@41571
   672
arguments must be in class "domain".) For example, the following
huffman@41401
   673
domain definition now works:
huffman@41401
   674
huffman@41401
   675
  domain natlist = nil | cons (lazy "nat discr") (lazy "natlist")
huffman@41401
   676
huffman@41401
   677
* Theory HOLCF/Library/HOL_Cpo provides cpo and predomain class
wenzelm@41571
   678
instances for types from main HOL: bool, nat, int, char, 'a + 'b,
wenzelm@41571
   679
'a option, and 'a list.  Additionally, it configures fixrec and the
wenzelm@41571
   680
domain package to work with these types.  For example:
huffman@41401
   681
huffman@41401
   682
  fixrec isInl :: "('a + 'b) u -> tr"
huffman@41401
   683
    where "isInl$(up$(Inl x)) = TT" | "isInl$(up$(Inr y)) = FF"
huffman@41401
   684
huffman@41401
   685
  domain V = VFun (lazy "V -> V") | VCon (lazy "nat") (lazy "V list")
huffman@41401
   686
wenzelm@41571
   687
* The "(permissive)" option of fixrec has been replaced with a
wenzelm@41571
   688
per-equation "(unchecked)" option. See
wenzelm@41571
   689
src/HOL/HOLCF/Tutorial/Fixrec_ex.thy for examples. INCOMPATIBILITY.
wenzelm@41571
   690
wenzelm@41571
   691
* The "bifinite" class no longer fixes a constant "approx"; the class
wenzelm@41571
   692
now just asserts that such a function exists.  INCOMPATIBILITY.
wenzelm@41571
   693
wenzelm@41571
   694
* Former type "alg_defl" has been renamed to "defl".  HOLCF no longer
huffman@41287
   695
defines an embedding of type 'a defl into udom by default; instances
wenzelm@41571
   696
of "bifinite" and "domain" classes are available in
wenzelm@41571
   697
src/HOL/HOLCF/Library/Defl_Bifinite.thy.
wenzelm@41571
   698
wenzelm@41571
   699
* The syntax "REP('a)" has been replaced with "DEFL('a)".
wenzelm@41571
   700
wenzelm@41571
   701
* The predicate "directed" has been removed.  INCOMPATIBILITY.
wenzelm@41571
   702
wenzelm@41571
   703
* The type class "finite_po" has been removed.  INCOMPATIBILITY.
wenzelm@41571
   704
wenzelm@41571
   705
* The function "cprod_map" has been renamed to "prod_map".
huffman@41401
   706
INCOMPATIBILITY.
huffman@41401
   707
huffman@41401
   708
* The monadic bind operator on each powerdomain has new binder syntax
wenzelm@41571
   709
similar to sets, e.g. "\<Union>\<sharp>x\<in>xs. t" represents
wenzelm@41571
   710
"upper_bind\<cdot>xs\<cdot>(\<Lambda> x. t)".
huffman@41401
   711
huffman@41401
   712
* The infix syntax for binary union on each powerdomain has changed
wenzelm@41571
   713
from e.g. "+\<sharp>" to "\<union>\<sharp>", for consistency with set
wenzelm@41571
   714
syntax.  INCOMPATIBILITY.
wenzelm@41571
   715
wenzelm@41571
   716
* The constant "UU" has been renamed to "bottom".  The syntax "UU" is
huffman@41429
   717
still supported as an input translation.
huffman@41429
   718
huffman@40621
   719
* Renamed some theorems (the original names are also still available).
wenzelm@41571
   720
huffman@40621
   721
  expand_fun_below   ~> fun_below_iff
huffman@40621
   722
  below_fun_ext      ~> fun_belowI
huffman@40621
   723
  expand_cfun_eq     ~> cfun_eq_iff
huffman@40621
   724
  ext_cfun           ~> cfun_eqI
huffman@40621
   725
  expand_cfun_below  ~> cfun_below_iff
huffman@40621
   726
  below_cfun_ext     ~> cfun_belowI
huffman@40621
   727
  cont2cont_Rep_CFun ~> cont2cont_APP
huffman@40621
   728
huffman@40621
   729
* The Abs and Rep functions for various types have changed names.
wenzelm@40948
   730
Related theorem names have also changed to match. INCOMPATIBILITY.
wenzelm@41571
   731
huffman@40621
   732
  Rep_CFun  ~> Rep_cfun
huffman@40621
   733
  Abs_CFun  ~> Abs_cfun
huffman@40621
   734
  Rep_Sprod ~> Rep_sprod
huffman@40621
   735
  Abs_Sprod ~> Abs_sprod
huffman@40621
   736
  Rep_Ssum  ~> Rep_ssum
huffman@40621
   737
  Abs_Ssum  ~> Abs_ssum
huffman@40621
   738
huffman@40621
   739
* Lemmas with names of the form *_defined_iff or *_strict_iff have
wenzelm@41571
   740
been renamed to *_bottom_iff.  INCOMPATIBILITY.
huffman@40621
   741
huffman@40621
   742
* Various changes to bisimulation/coinduction with domain package:
wenzelm@41571
   743
wenzelm@41571
   744
  - Definitions of "bisim" constants no longer mention definedness.
wenzelm@41571
   745
  - With mutual recursion, "bisim" predicate is now curried.
huffman@40621
   746
  - With mutual recursion, each type gets a separate coind theorem.
huffman@40621
   747
  - Variable names in bisim_def and coinduct rules have changed.
wenzelm@41571
   748
huffman@40621
   749
INCOMPATIBILITY.
huffman@40621
   750
wenzelm@41571
   751
* Case combinators generated by the domain package for type "foo" are
wenzelm@41571
   752
now named "foo_case" instead of "foo_when".  INCOMPATIBILITY.
huffman@40621
   753
huffman@40771
   754
* Several theorems have been renamed to more accurately reflect the
wenzelm@41571
   755
names of constants and types involved.  INCOMPATIBILITY.
wenzelm@41571
   756
huffman@40771
   757
  thelub_const    ~> lub_const
huffman@40771
   758
  lub_const       ~> is_lub_const
huffman@40771
   759
  thelubI         ~> lub_eqI
huffman@40771
   760
  is_lub_lub      ~> is_lubD2
huffman@40771
   761
  lubI            ~> is_lub_lub
huffman@40771
   762
  unique_lub      ~> is_lub_unique
huffman@40771
   763
  is_ub_lub       ~> is_lub_rangeD1
huffman@40771
   764
  lub_bin_chain   ~> is_lub_bin_chain
huffman@41030
   765
  lub_fun         ~> is_lub_fun
huffman@41030
   766
  thelub_fun      ~> lub_fun
huffman@41031
   767
  thelub_cfun     ~> lub_cfun
huffman@40771
   768
  thelub_Pair     ~> lub_Pair
huffman@40771
   769
  lub_cprod       ~> is_lub_prod
huffman@40771
   770
  thelub_cprod    ~> lub_prod
huffman@40771
   771
  minimal_cprod   ~> minimal_prod
huffman@40771
   772
  inst_cprod_pcpo ~> inst_prod_pcpo
huffman@41430
   773
  UU_I            ~> bottomI
huffman@41430
   774
  compact_UU      ~> compact_bottom
huffman@41430
   775
  deflation_UU    ~> deflation_bottom
huffman@41430
   776
  finite_deflation_UU ~> finite_deflation_bottom
huffman@40771
   777
wenzelm@41571
   778
* Many legacy theorem names have been discontinued.  INCOMPATIBILITY.
wenzelm@41571
   779
huffman@40621
   780
  sq_ord_less_eq_trans ~> below_eq_trans
huffman@40621
   781
  sq_ord_eq_less_trans ~> eq_below_trans
huffman@40621
   782
  refl_less            ~> below_refl
huffman@40621
   783
  trans_less           ~> below_trans
huffman@40621
   784
  antisym_less         ~> below_antisym
huffman@40621
   785
  antisym_less_inverse ~> po_eq_conv [THEN iffD1]
huffman@40621
   786
  box_less             ~> box_below
huffman@40621
   787
  rev_trans_less       ~> rev_below_trans
huffman@40621
   788
  not_less2not_eq      ~> not_below2not_eq
huffman@40621
   789
  less_UU_iff          ~> below_UU_iff
huffman@40621
   790
  flat_less_iff        ~> flat_below_iff
huffman@40621
   791
  adm_less             ~> adm_below
huffman@40621
   792
  adm_not_less         ~> adm_not_below
huffman@40621
   793
  adm_compact_not_less ~> adm_compact_not_below
huffman@40621
   794
  less_fun_def         ~> below_fun_def
huffman@40621
   795
  expand_fun_less      ~> fun_below_iff
huffman@40621
   796
  less_fun_ext         ~> fun_belowI
huffman@40621
   797
  less_discr_def       ~> below_discr_def
huffman@40621
   798
  discr_less_eq        ~> discr_below_eq
huffman@40621
   799
  less_unit_def        ~> below_unit_def
huffman@40621
   800
  less_cprod_def       ~> below_prod_def
huffman@40621
   801
  prod_lessI           ~> prod_belowI
huffman@40621
   802
  Pair_less_iff        ~> Pair_below_iff
huffman@40621
   803
  fst_less_iff         ~> fst_below_iff
huffman@40621
   804
  snd_less_iff         ~> snd_below_iff
huffman@40621
   805
  expand_cfun_less     ~> cfun_below_iff
huffman@40621
   806
  less_cfun_ext        ~> cfun_belowI
huffman@40621
   807
  injection_less       ~> injection_below
huffman@40621
   808
  less_up_def          ~> below_up_def
huffman@40621
   809
  not_Iup_less         ~> not_Iup_below
huffman@40621
   810
  Iup_less             ~> Iup_below
huffman@40621
   811
  up_less              ~> up_below
huffman@40621
   812
  Def_inject_less_eq   ~> Def_below_Def
huffman@40621
   813
  Def_less_is_eq       ~> Def_below_iff
huffman@40621
   814
  spair_less_iff       ~> spair_below_iff
huffman@40621
   815
  less_sprod           ~> below_sprod
huffman@40621
   816
  spair_less           ~> spair_below
huffman@40621
   817
  sfst_less_iff        ~> sfst_below_iff
huffman@40621
   818
  ssnd_less_iff        ~> ssnd_below_iff
huffman@40621
   819
  fix_least_less       ~> fix_least_below
huffman@40621
   820
  dist_less_one        ~> dist_below_one
huffman@40621
   821
  less_ONE             ~> below_ONE
huffman@40621
   822
  ONE_less_iff         ~> ONE_below_iff
huffman@40621
   823
  less_sinlD           ~> below_sinlD
huffman@40621
   824
  less_sinrD           ~> below_sinrD
huffman@40621
   825
huffman@40621
   826
wenzelm@40948
   827
*** FOL and ZF ***
haftmann@38522
   828
wenzelm@41310
   829
* All constant names are now qualified internally and use proper
wenzelm@41310
   830
identifiers, e.g. "IFOL.eq" instead of "op =".  INCOMPATIBILITY.
wenzelm@41310
   831
haftmann@38522
   832
wenzelm@37868
   833
*** ML ***
wenzelm@37868
   834
wenzelm@41594
   835
* Antiquotation @{assert} inlines a function bool -> unit that raises
wenzelm@41594
   836
Fail if the argument is false.  Due to inlining the source position of
wenzelm@41594
   837
failed assertions is included in the error output.
wenzelm@41594
   838
wenzelm@41594
   839
* Discontinued antiquotation @{theory_ref}, which is obsolete since ML
wenzelm@41594
   840
text is in practice always evaluated with a stable theory checkpoint.
wenzelm@41594
   841
Minor INCOMPATIBILITY, use (Theory.check_thy @{theory}) instead.
wenzelm@41594
   842
wenzelm@41594
   843
* Antiquotation @{theory A} refers to theory A from the ancestry of
wenzelm@41594
   844
the current context, not any accidental theory loader state as before.
wenzelm@41594
   845
Potential INCOMPATIBILITY, subtle change in semantics.
wenzelm@41228
   846
wenzelm@40956
   847
* Syntax.pretty_priority (default 0) configures the required priority
wenzelm@40956
   848
of pretty-printed output and thus affects insertion of parentheses.
wenzelm@40956
   849
wenzelm@40959
   850
* Syntax.default_root (default "any") configures the inner syntax
wenzelm@40959
   851
category (nonterminal symbol) for parsing of terms.
wenzelm@40959
   852
wenzelm@40722
   853
* Former exception Library.UnequalLengths now coincides with
wenzelm@40722
   854
ListPair.UnequalLengths.
wenzelm@40722
   855
wenzelm@41594
   856
* Renamed structure MetaSimplifier to Raw_Simplifier.  Note that the
wenzelm@41594
   857
main functionality is provided by structure Simplifier.
wenzelm@41594
   858
wenzelm@40627
   859
* Renamed raw "explode" function to "raw_explode" to emphasize its
wenzelm@40627
   860
meaning.  Note that internally to Isabelle, Symbol.explode is used in
wenzelm@40627
   861
almost all situations.
wenzelm@40627
   862
wenzelm@40318
   863
* Discontinued obsolete function sys_error and exception SYS_ERROR.
wenzelm@40318
   864
See implementation manual for further details on exceptions in
wenzelm@40318
   865
Isabelle/ML.
wenzelm@40318
   866
wenzelm@39616
   867
* Renamed setmp_noncritical to Unsynchronized.setmp to emphasize its
wenzelm@39616
   868
meaning.
wenzelm@39616
   869
wenzelm@39557
   870
* Renamed structure PureThy to Pure_Thy and moved most of its
wenzelm@39557
   871
operations to structure Global_Theory, to emphasize that this is
wenzelm@39557
   872
rarely-used global-only stuff.
wenzelm@39557
   873
wenzelm@39513
   874
* Discontinued Output.debug.  Minor INCOMPATIBILITY, use plain writeln
wenzelm@39513
   875
instead (or tracing for high-volume output).
wenzelm@39513
   876
wenzelm@38980
   877
* Configuration option show_question_marks only affects regular pretty
wenzelm@38980
   878
printing of types and terms, not raw Term.string_of_vname.
wenzelm@38980
   879
wenzelm@39164
   880
* ML_Context.thm and ML_Context.thms are no longer pervasive.  Rare
wenzelm@39164
   881
INCOMPATIBILITY, superseded by static antiquotations @{thm} and
wenzelm@39164
   882
@{thms} for most purposes.
wenzelm@39164
   883
wenzelm@41594
   884
* ML structure Unsynchronized is never opened, not even in Isar
wenzelm@38980
   885
interaction mode as before.  Old Unsynchronized.set etc. have been
wenzelm@38980
   886
discontinued -- use plain := instead.  This should be *rare* anyway,
wenzelm@38980
   887
since modern tools always work via official context data, notably
wenzelm@38980
   888
configuration options.
wenzelm@38980
   889
wenzelm@39239
   890
* Parallel and asynchronous execution requires special care concerning
wenzelm@39239
   891
interrupts.  Structure Exn provides some convenience functions that
wenzelm@39239
   892
avoid working directly with raw Interrupt.  User code must not absorb
wenzelm@39239
   893
interrupts -- intermediate handling (for cleanup etc.) needs to be
wenzelm@39239
   894
followed by re-raising of the original exception.  Another common
wenzelm@39239
   895
source of mistakes are "handle _" patterns, which make the meaning of
wenzelm@39239
   896
the program subject to physical effects of the environment.
wenzelm@39239
   897
wenzelm@37868
   898
wenzelm@37868
   899
wenzelm@37144
   900
New in Isabelle2009-2 (June 2010)
wenzelm@37144
   901
---------------------------------
haftmann@33993
   902
wenzelm@35260
   903
*** General ***
wenzelm@35260
   904
wenzelm@35436
   905
* Authentic syntax for *all* logical entities (type classes, type
wenzelm@35436
   906
constructors, term constants): provides simple and robust
wenzelm@35436
   907
correspondence between formal entities and concrete syntax.  Within
wenzelm@35436
   908
the parse tree / AST representations, "constants" are decorated by
wenzelm@35436
   909
their category (class, type, const) and spelled out explicitly with
wenzelm@35436
   910
their full internal name.
wenzelm@35436
   911
wenzelm@35436
   912
Substantial INCOMPATIBILITY concerning low-level syntax declarations
wenzelm@35436
   913
and translations (translation rules and translation functions in ML).
wenzelm@35436
   914
Some hints on upgrading:
wenzelm@35260
   915
wenzelm@35260
   916
  - Many existing uses of 'syntax' and 'translations' can be replaced
wenzelm@35436
   917
    by more modern 'type_notation', 'notation' and 'abbreviation',
wenzelm@35436
   918
    which are independent of this issue.
wenzelm@35260
   919
wenzelm@35260
   920
  - 'translations' require markup within the AST; the term syntax
wenzelm@35260
   921
    provides the following special forms:
wenzelm@35260
   922
wenzelm@35260
   923
      CONST c   -- produces syntax version of constant c from context
wenzelm@35261
   924
      XCONST c  -- literally c, checked as constant from context
wenzelm@35261
   925
      c         -- literally c, if declared by 'syntax'
wenzelm@35261
   926
wenzelm@35261
   927
    Plain identifiers are treated as AST variables -- occasionally the
wenzelm@35261
   928
    system indicates accidental variables via the error "rhs contains
wenzelm@35261
   929
    extra variables".
wenzelm@35260
   930
wenzelm@35436
   931
    Type classes and type constructors are marked according to their
wenzelm@35436
   932
    concrete syntax.  Some old translations rules need to be written
wenzelm@35436
   933
    for the "type" category, using type constructor application
wenzelm@35436
   934
    instead of pseudo-term application of the default category
wenzelm@35436
   935
    "logic".
wenzelm@35436
   936
wenzelm@35260
   937
  - 'parse_translation' etc. in ML may use the following
wenzelm@35260
   938
    antiquotations:
wenzelm@35260
   939
wenzelm@35436
   940
      @{class_syntax c}   -- type class c within parse tree / AST
wenzelm@35436
   941
      @{term_syntax c}    -- type constructor c within parse tree / AST
wenzelm@35260
   942
      @{const_syntax c}   -- ML version of "CONST c" above
wenzelm@35260
   943
      @{syntax_const c}   -- literally c (checked wrt. 'syntax' declarations)
wenzelm@35260
   944
wenzelm@35436
   945
  - Literal types within 'typed_print_translations', i.e. those *not*
wenzelm@35436
   946
    represented as pseudo-terms are represented verbatim.  Use @{class
wenzelm@35436
   947
    c} or @{type_name c} here instead of the above syntax
wenzelm@35436
   948
    antiquotations.
wenzelm@35436
   949
wenzelm@35260
   950
Note that old non-authentic syntax was based on unqualified base
wenzelm@35436
   951
names, so all of the above "constant" names would coincide.  Recall
wenzelm@35436
   952
that 'print_syntax' and ML_command "set Syntax.trace_ast" help to
wenzelm@35436
   953
diagnose syntax problems.
wenzelm@35260
   954
wenzelm@35351
   955
* Type constructors admit general mixfix syntax, not just infix.
wenzelm@35351
   956
wenzelm@36508
   957
* Concrete syntax may be attached to local entities without a proof
wenzelm@36508
   958
body, too.  This works via regular mixfix annotations for 'fix',
wenzelm@36508
   959
'def', 'obtain' etc. or via the explicit 'write' command, which is
wenzelm@36508
   960
similar to the 'notation' command in theory specifications.
wenzelm@36508
   961
wenzelm@37351
   962
* Discontinued unnamed infix syntax (legacy feature for many years) --
wenzelm@37351
   963
need to specify constant name and syntax separately.  Internal ML
wenzelm@37351
   964
datatype constructors have been renamed from InfixName to Infix etc.
wenzelm@37351
   965
Minor INCOMPATIBILITY.
wenzelm@37351
   966
wenzelm@37351
   967
* Schematic theorem statements need to be explicitly markup as such,
wenzelm@37351
   968
via commands 'schematic_lemma', 'schematic_theorem',
wenzelm@37351
   969
'schematic_corollary'.  Thus the relevance of the proof is made
wenzelm@37351
   970
syntactically clear, which impacts performance in a parallel or
wenzelm@37351
   971
asynchronous interactive environment.  Minor INCOMPATIBILITY.
wenzelm@37351
   972
wenzelm@35613
   973
* Use of cumulative prems via "!" in some proof methods has been
wenzelm@37351
   974
discontinued (old legacy feature).
wenzelm@35613
   975
boehmes@35979
   976
* References 'trace_simp' and 'debug_simp' have been replaced by
wenzelm@36857
   977
configuration options stored in the context. Enabling tracing (the
wenzelm@36857
   978
case of debugging is similar) in proofs works via
wenzelm@36857
   979
wenzelm@36857
   980
  using [[trace_simp = true]]
wenzelm@36857
   981
wenzelm@36857
   982
Tracing is then active for all invocations of the simplifier in
wenzelm@36857
   983
subsequent goal refinement steps. Tracing may also still be enabled or
wenzelm@40780
   984
disabled via the ProofGeneral settings menu.
boehmes@35979
   985
wenzelm@36177
   986
* Separate commands 'hide_class', 'hide_type', 'hide_const',
wenzelm@36177
   987
'hide_fact' replace the former 'hide' KIND command.  Minor
wenzelm@36177
   988
INCOMPATIBILITY.
wenzelm@36177
   989
wenzelm@37298
   990
* Improved parallelism of proof term normalization: usedir -p2 -q0 is
wenzelm@37298
   991
more efficient than combinations with -q1 or -q2.
wenzelm@37298
   992
wenzelm@35260
   993
haftmann@34170
   994
*** Pure ***
haftmann@34170
   995
wenzelm@37351
   996
* Proofterms record type-class reasoning explicitly, using the
wenzelm@37351
   997
"unconstrain" operation internally.  This eliminates all sort
wenzelm@37351
   998
constraints from a theorem and proof, introducing explicit
wenzelm@37351
   999
OFCLASS-premises.  On the proof term level, this operation is
wenzelm@37351
  1000
automatically applied at theorem boundaries, such that closed proofs
wenzelm@37351
  1001
are always free of sort constraints.  INCOMPATIBILITY for tools that
wenzelm@37351
  1002
inspect proof terms.
haftmann@36147
  1003
wenzelm@35765
  1004
* Local theory specifications may depend on extra type variables that
wenzelm@35765
  1005
are not present in the result type -- arguments TYPE('a) :: 'a itself
wenzelm@35765
  1006
are added internally.  For example:
wenzelm@35765
  1007
wenzelm@35765
  1008
  definition unitary :: bool where "unitary = (ALL (x::'a) y. x = y)"
wenzelm@35765
  1009
wenzelm@37351
  1010
* Predicates of locales introduced by classes carry a mandatory
wenzelm@37351
  1011
"class" prefix.  INCOMPATIBILITY.
wenzelm@37351
  1012
wenzelm@37351
  1013
* Vacuous class specifications observe default sort.  INCOMPATIBILITY.
wenzelm@37351
  1014
wenzelm@37351
  1015
* Old 'axclass' command has been discontinued.  INCOMPATIBILITY, use
wenzelm@37351
  1016
'class' instead.
wenzelm@37351
  1017
wenzelm@37351
  1018
* Command 'code_reflect' allows to incorporate generated ML code into
wenzelm@37351
  1019
runtime environment; replaces immature code_datatype antiquotation.
wenzelm@37351
  1020
INCOMPATIBILITY.
wenzelm@37351
  1021
wenzelm@37351
  1022
* Code generator: simple concept for abstract datatypes obeying
wenzelm@37351
  1023
invariants.
wenzelm@37351
  1024
wenzelm@36857
  1025
* Code generator: details of internal data cache have no impact on the
wenzelm@36857
  1026
user space functionality any longer.
wenzelm@36857
  1027
wenzelm@37351
  1028
* Methods "unfold_locales" and "intro_locales" ignore non-locale
wenzelm@37351
  1029
subgoals.  This is more appropriate for interpretations with 'where'.
wenzelm@36857
  1030
INCOMPATIBILITY.
haftmann@34170
  1031
wenzelm@36356
  1032
* Command 'example_proof' opens an empty proof body.  This allows to
wenzelm@36356
  1033
experiment with Isar, without producing any persistent result.
wenzelm@36356
  1034
wenzelm@35413
  1035
* Commands 'type_notation' and 'no_type_notation' declare type syntax
wenzelm@35413
  1036
within a local theory context, with explicit checking of the
wenzelm@35413
  1037
constructors involved (in contrast to the raw 'syntax' versions).
wenzelm@35413
  1038
wenzelm@36178
  1039
* Commands 'types' and 'typedecl' now work within a local theory
wenzelm@36178
  1040
context -- without introducing dependencies on parameters or
wenzelm@36178
  1041
assumptions, which is not possible in Isabelle/Pure.
wenzelm@35681
  1042
wenzelm@36857
  1043
* Command 'defaultsort' has been renamed to 'default_sort', it works
wenzelm@36857
  1044
within a local theory context.  Minor INCOMPATIBILITY.
wenzelm@36454
  1045
haftmann@34170
  1046
haftmann@33993
  1047
*** HOL ***
haftmann@33993
  1048
wenzelm@37351
  1049
* Command 'typedef' now works within a local theory context -- without
wenzelm@37351
  1050
introducing dependencies on parameters or assumptions, which is not
wenzelm@37351
  1051
possible in Isabelle/Pure/HOL.  Note that the logical environment may
wenzelm@37351
  1052
contain multiple interpretations of local typedefs (with different
wenzelm@37351
  1053
non-emptiness proofs), even in a global theory context.
wenzelm@37351
  1054
wenzelm@37351
  1055
* New package for quotient types.  Commands 'quotient_type' and
wenzelm@37351
  1056
'quotient_definition' may be used for defining types and constants by
wenzelm@37351
  1057
quotient constructions.  An example is the type of integers created by
wenzelm@37351
  1058
quotienting pairs of natural numbers:
wenzelm@37380
  1059
wenzelm@37351
  1060
  fun
wenzelm@37380
  1061
    intrel :: "(nat * nat) => (nat * nat) => bool"
wenzelm@37351
  1062
  where
wenzelm@37351
  1063
    "intrel (x, y) (u, v) = (x + v = u + y)"
wenzelm@37351
  1064
wenzelm@37380
  1065
  quotient_type int = "nat * nat" / intrel
wenzelm@37351
  1066
    by (auto simp add: equivp_def expand_fun_eq)
wenzelm@37380
  1067
wenzelm@37351
  1068
  quotient_definition
wenzelm@37351
  1069
    "0::int" is "(0::nat, 0::nat)"
wenzelm@37351
  1070
wenzelm@37351
  1071
The method "lifting" can be used to lift of theorems from the
wenzelm@37351
  1072
underlying "raw" type to the quotient type.  The example
wenzelm@37351
  1073
src/HOL/Quotient_Examples/FSet.thy includes such a quotient
wenzelm@37351
  1074
construction and provides a reasoning infrastructure for finite sets.
wenzelm@37351
  1075
wenzelm@37351
  1076
* Renamed Library/Quotient.thy to Library/Quotient_Type.thy to avoid
wenzelm@37351
  1077
clash with new theory Quotient in Main HOL.
wenzelm@37351
  1078
wenzelm@37351
  1079
* Moved the SMT binding into the main HOL session, eliminating
wenzelm@37351
  1080
separate HOL-SMT session.
wenzelm@37351
  1081
haftmann@37020
  1082
* List membership infix mem operation is only an input abbreviation.
haftmann@37020
  1083
INCOMPATIBILITY.
haftmann@37020
  1084
wenzelm@37144
  1085
* Theory Library/Word.thy has been removed.  Use library Word/Word.thy
wenzelm@37144
  1086
for future developements; former Library/Word.thy is still present in
wenzelm@37144
  1087
the AFP entry RSAPPS.
haftmann@36963
  1088
wenzelm@36857
  1089
* Theorem Int.int_induct renamed to Int.int_of_nat_induct and is no
wenzelm@36857
  1090
longer shadowed.  INCOMPATIBILITY.
haftmann@36808
  1091
huffman@36836
  1092
* Dropped theorem duplicate comp_arith; use semiring_norm instead.
huffman@36836
  1093
INCOMPATIBILITY.
huffman@36836
  1094
huffman@36836
  1095
* Dropped theorem RealPow.real_sq_order; use power2_le_imp_le instead.
huffman@36836
  1096
INCOMPATIBILITY.
haftmann@36714
  1097
wenzelm@36857
  1098
* Dropped normalizing_semiring etc; use the facts in semiring classes
wenzelm@36857
  1099
instead.  INCOMPATIBILITY.
wenzelm@36857
  1100
huffman@36979
  1101
* Dropped several real-specific versions of lemmas about floor and
wenzelm@37351
  1102
ceiling; use the generic lemmas from theory "Archimedean_Field"
wenzelm@37351
  1103
instead.  INCOMPATIBILITY.
huffman@36979
  1104
huffman@36979
  1105
  floor_number_of_eq         ~> floor_number_of
huffman@36979
  1106
  le_floor_eq_number_of      ~> number_of_le_floor
huffman@36979
  1107
  le_floor_eq_zero           ~> zero_le_floor
huffman@36979
  1108
  le_floor_eq_one            ~> one_le_floor
huffman@36979
  1109
  floor_less_eq_number_of    ~> floor_less_number_of
huffman@36979
  1110
  floor_less_eq_zero         ~> floor_less_zero
huffman@36979
  1111
  floor_less_eq_one          ~> floor_less_one
huffman@36979
  1112
  less_floor_eq_number_of    ~> number_of_less_floor
huffman@36979
  1113
  less_floor_eq_zero         ~> zero_less_floor
huffman@36979
  1114
  less_floor_eq_one          ~> one_less_floor
huffman@36979
  1115
  floor_le_eq_number_of      ~> floor_le_number_of
huffman@36979
  1116
  floor_le_eq_zero           ~> floor_le_zero
huffman@36979
  1117
  floor_le_eq_one            ~> floor_le_one
huffman@36979
  1118
  floor_subtract_number_of   ~> floor_diff_number_of
huffman@36979
  1119
  floor_subtract_one         ~> floor_diff_one
huffman@36979
  1120
  ceiling_number_of_eq       ~> ceiling_number_of
huffman@36979
  1121
  ceiling_le_eq_number_of    ~> ceiling_le_number_of
huffman@36979
  1122
  ceiling_le_zero_eq         ~> ceiling_le_zero
huffman@36979
  1123
  ceiling_le_eq_one          ~> ceiling_le_one
huffman@36979
  1124
  less_ceiling_eq_number_of  ~> number_of_less_ceiling
huffman@36979
  1125
  less_ceiling_eq_zero       ~> zero_less_ceiling
huffman@36979
  1126
  less_ceiling_eq_one        ~> one_less_ceiling
huffman@36979
  1127
  ceiling_less_eq_number_of  ~> ceiling_less_number_of
huffman@36979
  1128
  ceiling_less_eq_zero       ~> ceiling_less_zero
huffman@36979
  1129
  ceiling_less_eq_one        ~> ceiling_less_one
huffman@36979
  1130
  le_ceiling_eq_number_of    ~> number_of_le_ceiling
huffman@36979
  1131
  le_ceiling_eq_zero         ~> zero_le_ceiling
huffman@36979
  1132
  le_ceiling_eq_one          ~> one_le_ceiling
huffman@36979
  1133
  ceiling_subtract_number_of ~> ceiling_diff_number_of
huffman@36979
  1134
  ceiling_subtract_one       ~> ceiling_diff_one
huffman@36979
  1135
wenzelm@37144
  1136
* Theory "Finite_Set": various folding_XXX locales facilitate the
wenzelm@36857
  1137
application of the various fold combinators on finite sets.
wenzelm@36857
  1138
wenzelm@36857
  1139
* Library theory "RBT" renamed to "RBT_Impl"; new library theory "RBT"
wenzelm@36857
  1140
provides abstract red-black tree type which is backed by "RBT_Impl" as
wenzelm@36857
  1141
implementation.  INCOMPATIBILTY.
haftmann@36147
  1142
huffman@36830
  1143
* Theory Library/Coinductive_List has been removed -- superseded by
wenzelm@35763
  1144
AFP/thys/Coinductive.
wenzelm@35763
  1145
huffman@36829
  1146
* Theory PReal, including the type "preal" and related operations, has
huffman@36829
  1147
been removed.  INCOMPATIBILITY.
huffman@36829
  1148
wenzelm@37380
  1149
* Real: new development using Cauchy Sequences.
wenzelm@37380
  1150
wenzelm@37351
  1151
* Split off theory "Big_Operators" containing setsum, setprod,
wenzelm@37351
  1152
Inf_fin, Sup_fin, Min, Max from theory Finite_Set.  INCOMPATIBILITY.
wenzelm@36857
  1153
wenzelm@36857
  1154
* Theory "Rational" renamed to "Rat", for consistency with "Nat",
wenzelm@36857
  1155
"Int" etc.  INCOMPATIBILITY.
wenzelm@36857
  1156
wenzelm@37351
  1157
* Constant Rat.normalize needs to be qualified.  INCOMPATIBILITY.
wenzelm@37143
  1158
wenzelm@36857
  1159
* New set of rules "ac_simps" provides combined assoc / commute
wenzelm@36857
  1160
rewrites for all interpretations of the appropriate generic locales.
wenzelm@36857
  1161
wenzelm@36857
  1162
* Renamed theory "OrderedGroup" to "Groups" and split theory
wenzelm@36857
  1163
"Ring_and_Field" into theories "Rings" and "Fields"; for more
wenzelm@36857
  1164
appropriate and more consistent names suitable for name prefixes
wenzelm@36857
  1165
within the HOL theories.  INCOMPATIBILITY.
haftmann@35050
  1166
haftmann@35084
  1167
* Some generic constants have been put to appropriate theories:
wenzelm@36857
  1168
  - less_eq, less: Orderings
wenzelm@36857
  1169
  - zero, one, plus, minus, uminus, times, abs, sgn: Groups
wenzelm@36857
  1170
  - inverse, divide: Rings
haftmann@35084
  1171
INCOMPATIBILITY.
haftmann@35084
  1172
wenzelm@36857
  1173
* More consistent naming of type classes involving orderings (and
wenzelm@36857
  1174
lattices):
haftmann@35027
  1175
haftmann@35027
  1176
    lower_semilattice                   ~> semilattice_inf
haftmann@35027
  1177
    upper_semilattice                   ~> semilattice_sup
haftmann@35027
  1178
haftmann@35027
  1179
    dense_linear_order                  ~> dense_linorder
haftmann@35027
  1180
haftmann@35027
  1181
    pordered_ab_group_add               ~> ordered_ab_group_add
haftmann@35027
  1182
    pordered_ab_group_add_abs           ~> ordered_ab_group_add_abs
haftmann@35027
  1183
    pordered_ab_semigroup_add           ~> ordered_ab_semigroup_add
haftmann@35027
  1184
    pordered_ab_semigroup_add_imp_le    ~> ordered_ab_semigroup_add_imp_le
haftmann@35027
  1185
    pordered_cancel_ab_semigroup_add    ~> ordered_cancel_ab_semigroup_add
haftmann@35027
  1186
    pordered_cancel_comm_semiring       ~> ordered_cancel_comm_semiring
haftmann@35027
  1187
    pordered_cancel_semiring            ~> ordered_cancel_semiring
haftmann@35027
  1188
    pordered_comm_monoid_add            ~> ordered_comm_monoid_add
haftmann@35027
  1189
    pordered_comm_ring                  ~> ordered_comm_ring
haftmann@35027
  1190
    pordered_comm_semiring              ~> ordered_comm_semiring
haftmann@35027
  1191
    pordered_ring                       ~> ordered_ring
haftmann@35027
  1192
    pordered_ring_abs                   ~> ordered_ring_abs
haftmann@35027
  1193
    pordered_semiring                   ~> ordered_semiring
haftmann@35027
  1194
haftmann@35027
  1195
    ordered_ab_group_add                ~> linordered_ab_group_add
haftmann@35027
  1196
    ordered_ab_semigroup_add            ~> linordered_ab_semigroup_add
haftmann@35027
  1197
    ordered_cancel_ab_semigroup_add     ~> linordered_cancel_ab_semigroup_add
haftmann@35027
  1198
    ordered_comm_semiring_strict        ~> linordered_comm_semiring_strict
haftmann@35027
  1199
    ordered_field                       ~> linordered_field
haftmann@35027
  1200
    ordered_field_no_lb                 ~> linordered_field_no_lb
haftmann@35027
  1201
    ordered_field_no_ub                 ~> linordered_field_no_ub
haftmann@35027
  1202
    ordered_field_dense_linear_order    ~> dense_linordered_field
haftmann@35027
  1203
    ordered_idom                        ~> linordered_idom
haftmann@35027
  1204
    ordered_ring                        ~> linordered_ring
haftmann@35027
  1205
    ordered_ring_le_cancel_factor       ~> linordered_ring_le_cancel_factor
haftmann@35027
  1206
    ordered_ring_less_cancel_factor     ~> linordered_ring_less_cancel_factor
haftmann@35027
  1207
    ordered_ring_strict                 ~> linordered_ring_strict
haftmann@35027
  1208
    ordered_semidom                     ~> linordered_semidom
haftmann@35027
  1209
    ordered_semiring                    ~> linordered_semiring
haftmann@35027
  1210
    ordered_semiring_1                  ~> linordered_semiring_1
haftmann@35027
  1211
    ordered_semiring_1_strict           ~> linordered_semiring_1_strict
haftmann@35027
  1212
    ordered_semiring_strict             ~> linordered_semiring_strict
haftmann@35027
  1213
wenzelm@36857
  1214
  The following slightly odd type classes have been moved to a
wenzelm@37351
  1215
  separate theory Library/Lattice_Algebras:
haftmann@35032
  1216
haftmann@35032
  1217
    lordered_ab_group_add               ~> lattice_ab_group_add
haftmann@35032
  1218
    lordered_ab_group_add_abs           ~> lattice_ab_group_add_abs
haftmann@35032
  1219
    lordered_ab_group_add_meet          ~> semilattice_inf_ab_group_add
haftmann@35032
  1220
    lordered_ab_group_add_join          ~> semilattice_sup_ab_group_add
haftmann@35032
  1221
    lordered_ring                       ~> lattice_ring
haftmann@35032
  1222
haftmann@35027
  1223
INCOMPATIBILITY.
haftmann@35027
  1224
haftmann@36416
  1225
* Refined field classes:
wenzelm@36857
  1226
  - classes division_ring_inverse_zero, field_inverse_zero,
wenzelm@36857
  1227
    linordered_field_inverse_zero include rule inverse 0 = 0 --
wenzelm@36857
  1228
    subsumes former division_by_zero class;
wenzelm@36857
  1229
  - numerous lemmas have been ported from field to division_ring.
wenzelm@36857
  1230
INCOMPATIBILITY.
haftmann@36416
  1231
haftmann@36416
  1232
* Refined algebra theorem collections:
wenzelm@36857
  1233
  - dropped theorem group group_simps, use algebra_simps instead;
wenzelm@36857
  1234
  - dropped theorem group ring_simps, use field_simps instead;
wenzelm@36857
  1235
  - proper theorem collection field_simps subsumes former theorem
wenzelm@36857
  1236
    groups field_eq_simps and field_simps;
wenzelm@36857
  1237
  - dropped lemma eq_minus_self_iff which is a duplicate for
wenzelm@36857
  1238
    equal_neg_zero.
wenzelm@36857
  1239
INCOMPATIBILITY.
wenzelm@35009
  1240
wenzelm@35009
  1241
* Theory Finite_Set and List: some lemmas have been generalized from
wenzelm@34076
  1242
sets to lattices:
wenzelm@34076
  1243
haftmann@34007
  1244
  fun_left_comm_idem_inter      ~> fun_left_comm_idem_inf
haftmann@34007
  1245
  fun_left_comm_idem_union      ~> fun_left_comm_idem_sup
haftmann@34007
  1246
  inter_Inter_fold_inter        ~> inf_Inf_fold_inf
haftmann@34007
  1247
  union_Union_fold_union        ~> sup_Sup_fold_sup
haftmann@34007
  1248
  Inter_fold_inter              ~> Inf_fold_inf
haftmann@34007
  1249
  Union_fold_union              ~> Sup_fold_sup
haftmann@34007
  1250
  inter_INTER_fold_inter        ~> inf_INFI_fold_inf
haftmann@34007
  1251
  union_UNION_fold_union        ~> sup_SUPR_fold_sup
haftmann@34007
  1252
  INTER_fold_inter              ~> INFI_fold_inf
haftmann@34007
  1253
  UNION_fold_union              ~> SUPR_fold_sup
haftmann@34007
  1254
wenzelm@37351
  1255
* Theory "Complete_Lattice": lemmas top_def and bot_def have been
haftmann@36416
  1256
replaced by the more convenient lemmas Inf_empty and Sup_empty.
haftmann@36416
  1257
Dropped lemmas Inf_insert_simp and Sup_insert_simp, which are subsumed
haftmann@36416
  1258
by Inf_insert and Sup_insert.  Lemmas Inf_UNIV and Sup_UNIV replace
haftmann@36416
  1259
former Inf_Univ and Sup_Univ.  Lemmas inf_top_right and sup_bot_right
haftmann@36416
  1260
subsume inf_top and sup_bot respectively.  INCOMPATIBILITY.
haftmann@36416
  1261
wenzelm@36857
  1262
* Reorganized theory Multiset: swapped notation of pointwise and
wenzelm@36857
  1263
multiset order:
wenzelm@37351
  1264
wenzelm@36857
  1265
  - pointwise ordering is instance of class order with standard syntax
wenzelm@36857
  1266
    <= and <;
wenzelm@36857
  1267
  - multiset ordering has syntax <=# and <#; partial order properties
wenzelm@36857
  1268
    are provided by means of interpretation with prefix
wenzelm@36857
  1269
    multiset_order;
wenzelm@36857
  1270
  - less duplication, less historical organization of sections,
wenzelm@36857
  1271
    conversion from associations lists to multisets, rudimentary code
wenzelm@36857
  1272
    generation;
wenzelm@36857
  1273
  - use insert_DiffM2 [symmetric] instead of elem_imp_eq_diff_union,
wenzelm@36857
  1274
    if needed.
wenzelm@37351
  1275
nipkow@36903
  1276
Renamed:
wenzelm@37351
  1277
wenzelm@37351
  1278
  multiset_eq_conv_count_eq  ~>  multiset_ext_iff
wenzelm@37351
  1279
  multi_count_ext  ~>  multiset_ext
wenzelm@37351
  1280
  diff_union_inverse2  ~>  diff_union_cancelR
wenzelm@37351
  1281
wenzelm@36857
  1282
INCOMPATIBILITY.
haftmann@36416
  1283
nipkow@36903
  1284
* Theory Permutation: replaced local "remove" by List.remove1.
nipkow@36903
  1285
haftmann@36416
  1286
* Code generation: ML and OCaml code is decorated with signatures.
haftmann@36416
  1287
wenzelm@35009
  1288
* Theory List: added transpose.
wenzelm@35009
  1289
huffman@35810
  1290
* Library/Nat_Bijection.thy is a collection of bijective functions
huffman@35810
  1291
between nat and other types, which supersedes the older libraries
huffman@35810
  1292
Library/Nat_Int_Bij.thy and HOLCF/NatIso.thy.  INCOMPATIBILITY.
huffman@35810
  1293
huffman@35810
  1294
  Constants:
huffman@35810
  1295
  Nat_Int_Bij.nat2_to_nat         ~> prod_encode
huffman@35810
  1296
  Nat_Int_Bij.nat_to_nat2         ~> prod_decode
huffman@35810
  1297
  Nat_Int_Bij.int_to_nat_bij      ~> int_encode
huffman@35810
  1298
  Nat_Int_Bij.nat_to_int_bij      ~> int_decode
huffman@35810
  1299
  Countable.pair_encode           ~> prod_encode
huffman@35810
  1300
  NatIso.prod2nat                 ~> prod_encode
huffman@35810
  1301
  NatIso.nat2prod                 ~> prod_decode
huffman@35810
  1302
  NatIso.sum2nat                  ~> sum_encode
huffman@35810
  1303
  NatIso.nat2sum                  ~> sum_decode
huffman@35810
  1304
  NatIso.list2nat                 ~> list_encode
huffman@35810
  1305
  NatIso.nat2list                 ~> list_decode
huffman@35810
  1306
  NatIso.set2nat                  ~> set_encode
huffman@35810
  1307
  NatIso.nat2set                  ~> set_decode
huffman@35810
  1308
huffman@35810
  1309
  Lemmas:
huffman@35810
  1310
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_decode
huffman@35810
  1311
  Nat_Int_Bij.nat2_to_nat_inj     ~> inj_prod_encode
huffman@35810
  1312
  Nat_Int_Bij.nat2_to_nat_surj    ~> surj_prod_encode
huffman@35810
  1313
  Nat_Int_Bij.nat_to_nat2_inj     ~> inj_prod_decode
huffman@35810
  1314
  Nat_Int_Bij.nat_to_nat2_surj    ~> surj_prod_decode
huffman@35810
  1315
  Nat_Int_Bij.i2n_n2i_id          ~> int_encode_inverse
huffman@35810
  1316
  Nat_Int_Bij.n2i_i2n_id          ~> int_decode_inverse
huffman@35810
  1317
  Nat_Int_Bij.surj_nat_to_int_bij ~> surj_int_encode
huffman@35810
  1318
  Nat_Int_Bij.surj_int_to_nat_bij ~> surj_int_decode
huffman@35810
  1319
  Nat_Int_Bij.inj_nat_to_int_bij  ~> inj_int_encode
huffman@35810
  1320
  Nat_Int_Bij.inj_int_to_nat_bij  ~> inj_int_decode
huffman@35810
  1321
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_encode
huffman@35810
  1322
  Nat_Int_Bij.bij_int_to_nat_bij  ~> bij_int_decode
huffman@35810
  1323
blanchet@36929
  1324
* Sledgehammer:
blanchet@36929
  1325
  - Renamed ATP commands:
blanchet@36929
  1326
    atp_info     ~> sledgehammer running_atps
blanchet@36929
  1327
    atp_kill     ~> sledgehammer kill_atps
blanchet@36929
  1328
    atp_messages ~> sledgehammer messages
blanchet@36929
  1329
    atp_minimize ~> sledgehammer minimize
blanchet@36929
  1330
    print_atps   ~> sledgehammer available_atps
blanchet@36929
  1331
    INCOMPATIBILITY.
blanchet@36929
  1332
  - Added user's manual ("isabelle doc sledgehammer").
blanchet@36929
  1333
  - Added option syntax and "sledgehammer_params" to customize
blanchet@36929
  1334
    Sledgehammer's behavior.  See the manual for details.
blanchet@36929
  1335
  - Modified the Isar proof reconstruction code so that it produces
blanchet@36929
  1336
    direct proofs rather than proofs by contradiction.  (This feature
blanchet@36929
  1337
    is still experimental.)
blanchet@36929
  1338
  - Made Isar proof reconstruction work for SPASS, remote ATPs, and in
blanchet@36929
  1339
    full-typed mode.
blanchet@36929
  1340
  - Added support for TPTP syntax for SPASS via the "spass_tptp" ATP.
blanchet@36929
  1341
blanchet@36928
  1342
* Nitpick:
blanchet@36928
  1343
  - Added and implemented "binary_ints" and "bits" options.
blanchet@36928
  1344
  - Added "std" option and implemented support for nonstandard models.
blanchet@36928
  1345
  - Added and implemented "finitize" option to improve the precision
blanchet@36928
  1346
    of infinite datatypes based on a monotonicity analysis.
blanchet@36928
  1347
  - Added support for quotient types.
blanchet@36928
  1348
  - Added support for "specification" and "ax_specification"
blanchet@36928
  1349
    constructs.
blanchet@36928
  1350
  - Added support for local definitions (for "function" and
blanchet@36928
  1351
    "termination" proofs).
blanchet@36928
  1352
  - Added support for term postprocessors.
blanchet@36928
  1353
  - Optimized "Multiset.multiset" and "FinFun.finfun".
blanchet@36928
  1354
  - Improved efficiency of "destroy_constrs" optimization.
blanchet@36928
  1355
  - Fixed soundness bugs related to "destroy_constrs" optimization and
blanchet@36928
  1356
    record getters.
blanchet@37272
  1357
  - Fixed soundness bug related to higher-order constructors.
blanchet@37272
  1358
  - Fixed soundness bug when "full_descrs" is enabled.
blanchet@36928
  1359
  - Improved precision of set constructs.
blanchet@37260
  1360
  - Added "atoms" option.
blanchet@36928
  1361
  - Added cache to speed up repeated Kodkod invocations on the same
blanchet@36928
  1362
    problems.
blanchet@36928
  1363
  - Renamed "MiniSatJNI", "zChaffJNI", "BerkMinAlloy", and
blanchet@36928
  1364
    "SAT4JLight" to "MiniSat_JNI", "zChaff_JNI", "BerkMin_Alloy", and
blanchet@36928
  1365
    "SAT4J_Light".  INCOMPATIBILITY.
blanchet@36928
  1366
  - Removed "skolemize", "uncurry", "sym_break", "flatten_prop",
blanchet@36928
  1367
    "sharing_depth", and "show_skolems" options.  INCOMPATIBILITY.
blanchet@37264
  1368
  - Removed "nitpick_intro" attribute.  INCOMPATIBILITY.
blanchet@36928
  1369
berghofe@37361
  1370
* Method "induct" now takes instantiations of the form t, where t is not
berghofe@37361
  1371
  a variable, as a shorthand for "x == t", where x is a fresh variable.
berghofe@37361
  1372
  If this is not intended, t has to be enclosed in parentheses.
berghofe@37361
  1373
  By default, the equalities generated by definitional instantiations
berghofe@37361
  1374
  are pre-simplified, which may cause parameters of inductive cases
berghofe@37361
  1375
  to disappear, or may even delete some of the inductive cases.
berghofe@37361
  1376
  Use "induct (no_simp)" instead of "induct" to restore the old
berghofe@37361
  1377
  behaviour. The (no_simp) option is also understood by the "cases"
berghofe@37361
  1378
  and "nominal_induct" methods, which now perform pre-simplification, too.
berghofe@37361
  1379
  INCOMPATIBILITY.
berghofe@37361
  1380
haftmann@33993
  1381
huffman@36828
  1382
*** HOLCF ***
huffman@36828
  1383
huffman@36828
  1384
* Variable names in lemmas generated by the domain package have
huffman@36828
  1385
changed; the naming scheme is now consistent with the HOL datatype
huffman@36828
  1386
package.  Some proof scripts may be affected, INCOMPATIBILITY.
huffman@36828
  1387
huffman@36828
  1388
* The domain package no longer defines the function "foo_copy" for
huffman@36828
  1389
recursive domain "foo".  The reach lemma is now stated directly in
huffman@36828
  1390
terms of "foo_take".  Lemmas and proofs that mention "foo_copy" must
huffman@36828
  1391
be reformulated in terms of "foo_take", INCOMPATIBILITY.
huffman@36828
  1392
huffman@36828
  1393
* Most definedness lemmas generated by the domain package (previously
huffman@36828
  1394
of the form "x ~= UU ==> foo$x ~= UU") now have an if-and-only-if form
huffman@36828
  1395
like "foo$x = UU <-> x = UU", which works better as a simp rule.
wenzelm@37351
  1396
Proofs that used definedness lemmas as intro rules may break,
huffman@36828
  1397
potential INCOMPATIBILITY.
huffman@36828
  1398
huffman@36828
  1399
* Induction and casedist rules generated by the domain package now
huffman@36828
  1400
declare proper case_names (one called "bottom", and one named for each
huffman@36828
  1401
constructor).  INCOMPATIBILITY.
huffman@36828
  1402
huffman@36828
  1403
* For mutually-recursive domains, separate "reach" and "take_lemma"
huffman@36828
  1404
rules are generated for each domain, INCOMPATIBILITY.
huffman@36828
  1405
huffman@36828
  1406
  foo_bar.reach       ~> foo.reach  bar.reach
huffman@36828
  1407
  foo_bar.take_lemmas ~> foo.take_lemma  bar.take_lemma
huffman@36828
  1408
huffman@36828
  1409
* Some lemmas generated by the domain package have been renamed for
huffman@36828
  1410
consistency with the datatype package, INCOMPATIBILITY.
huffman@36828
  1411
huffman@36828
  1412
  foo.ind        ~> foo.induct
huffman@36828
  1413
  foo.finite_ind ~> foo.finite_induct
huffman@36828
  1414
  foo.coind      ~> foo.coinduct
huffman@36828
  1415
  foo.casedist   ~> foo.exhaust
huffman@36828
  1416
  foo.exhaust    ~> foo.nchotomy
huffman@36828
  1417
huffman@36828
  1418
* For consistency with other definition packages, the fixrec package
huffman@36828
  1419
now generates qualified theorem names, INCOMPATIBILITY.
huffman@36828
  1420
huffman@36828
  1421
  foo_simps  ~> foo.simps
huffman@36828
  1422
  foo_unfold ~> foo.unfold
huffman@36828
  1423
  foo_induct ~> foo.induct
huffman@36828
  1424
huffman@37087
  1425
* The "fixrec_simp" attribute has been removed.  The "fixrec_simp"
huffman@37087
  1426
method and internal fixrec proofs now use the default simpset instead.
huffman@37087
  1427
INCOMPATIBILITY.
huffman@37087
  1428
huffman@36828
  1429
* The "contlub" predicate has been removed.  Proof scripts should use
huffman@36828
  1430
lemma contI2 in place of monocontlub2cont, INCOMPATIBILITY.
huffman@36828
  1431
huffman@36828
  1432
* The "admw" predicate has been removed, INCOMPATIBILITY.
huffman@36828
  1433
huffman@36828
  1434
* The constants cpair, cfst, and csnd have been removed in favor of
huffman@36828
  1435
Pair, fst, and snd from Isabelle/HOL, INCOMPATIBILITY.
huffman@36828
  1436
huffman@36828
  1437
haftmann@33993
  1438
*** ML ***
haftmann@33993
  1439
wenzelm@37351
  1440
* Antiquotations for basic formal entities:
wenzelm@37351
  1441
wenzelm@37351
  1442
    @{class NAME}         -- type class
wenzelm@37351
  1443
    @{class_syntax NAME}  -- syntax representation of the above
wenzelm@37351
  1444
wenzelm@37351
  1445
    @{type_name NAME}     -- logical type
wenzelm@37351
  1446
    @{type_abbrev NAME}   -- type abbreviation
wenzelm@37351
  1447
    @{nonterminal NAME}   -- type of concrete syntactic category
wenzelm@37351
  1448
    @{type_syntax NAME}   -- syntax representation of any of the above
wenzelm@37351
  1449
wenzelm@37351
  1450
    @{const_name NAME}    -- logical constant (INCOMPATIBILITY)
wenzelm@37351
  1451
    @{const_abbrev NAME}  -- abbreviated constant
wenzelm@37351
  1452
    @{const_syntax NAME}  -- syntax representation of any of the above
wenzelm@37351
  1453
wenzelm@37351
  1454
* Antiquotation @{syntax_const NAME} ensures that NAME refers to a raw
wenzelm@37351
  1455
syntax constant (cf. 'syntax' command).
wenzelm@37351
  1456
wenzelm@37351
  1457
* Antiquotation @{make_string} inlines a function to print arbitrary
wenzelm@37351
  1458
values similar to the ML toplevel.  The result is compiler dependent
wenzelm@37351
  1459
and may fall back on "?" in certain situations.
wenzelm@37351
  1460
wenzelm@37351
  1461
* Diagnostic commands 'ML_val' and 'ML_command' may refer to
wenzelm@37351
  1462
antiquotations @{Isar.state} and @{Isar.goal}.  This replaces impure
wenzelm@37351
  1463
Isar.state() and Isar.goal(), which belong to the old TTY loop and do
wenzelm@37351
  1464
not work with the asynchronous Isar document model.
wenzelm@37351
  1465
wenzelm@37351
  1466
* Configuration options now admit dynamic default values, depending on
wenzelm@37351
  1467
the context or even global references.
wenzelm@37351
  1468
wenzelm@37351
  1469
* SHA1.digest digests strings according to SHA-1 (see RFC 3174).  It
wenzelm@37351
  1470
uses an efficient external library if available (for Poly/ML).
wenzelm@37351
  1471
wenzelm@37144
  1472
* Renamed some important ML structures, while keeping the old names
wenzelm@37144
  1473
for some time as aliases within the structure Legacy:
wenzelm@37144
  1474
wenzelm@37144
  1475
  OuterKeyword  ~>  Keyword
wenzelm@37144
  1476
  OuterLex      ~>  Token
wenzelm@37144
  1477
  OuterParse    ~>  Parse
wenzelm@37144
  1478
  OuterSyntax   ~>  Outer_Syntax
wenzelm@37216
  1479
  PrintMode     ~>  Print_Mode
wenzelm@37144
  1480
  SpecParse     ~>  Parse_Spec
wenzelm@37216
  1481
  ThyInfo       ~>  Thy_Info
wenzelm@37216
  1482
  ThyLoad       ~>  Thy_Load
wenzelm@37216
  1483
  ThyOutput     ~>  Thy_Output
wenzelm@37145
  1484
  TypeInfer     ~>  Type_Infer
wenzelm@37144
  1485
wenzelm@37144
  1486
Note that "open Legacy" simplifies porting of sources, but forgetting
wenzelm@37144
  1487
to remove it again will complicate porting again in the future.
wenzelm@37144
  1488
wenzelm@37144
  1489
* Most operations that refer to a global context are named
wenzelm@37144
  1490
accordingly, e.g. Simplifier.global_context or
wenzelm@37144
  1491
ProofContext.init_global.  There are some situations where a global
wenzelm@37144
  1492
context actually works, but under normal circumstances one needs to
wenzelm@37144
  1493
pass the proper local context through the code!
wenzelm@37144
  1494
wenzelm@37144
  1495
* Discontinued old TheoryDataFun with its copy/init operation -- data
wenzelm@37144
  1496
needs to be pure.  Functor Theory_Data_PP retains the traditional
wenzelm@37144
  1497
Pretty.pp argument to merge, which is absent in the standard
wenzelm@37144
  1498
Theory_Data version.
wenzelm@36429
  1499
wenzelm@37144
  1500
* Sorts.certify_sort and derived "cert" operations for types and terms
wenzelm@37144
  1501
no longer minimize sorts.  Thus certification at the boundary of the
wenzelm@37144
  1502
inference kernel becomes invariant under addition of class relations,
wenzelm@37144
  1503
which is an important monotonicity principle.  Sorts are now minimized
wenzelm@37144
  1504
in the syntax layer only, at the boundary between the end-user and the
wenzelm@37144
  1505
system.  Subtle INCOMPATIBILITY, may have to use Sign.minimize_sort
wenzelm@37144
  1506
explicitly in rare situations.
wenzelm@37144
  1507
wenzelm@35021
  1508
* Renamed old-style Drule.standard to Drule.export_without_context, to
wenzelm@35021
  1509
emphasize that this is in no way a standard operation.
wenzelm@35021
  1510
INCOMPATIBILITY.
wenzelm@35021
  1511
wenzelm@34076
  1512
* Subgoal.FOCUS (and variants): resulting goal state is normalized as
wenzelm@34076
  1513
usual for resolution.  Rare INCOMPATIBILITY.
wenzelm@34076
  1514
wenzelm@35845
  1515
* Renamed varify/unvarify operations to varify_global/unvarify_global
wenzelm@35845
  1516
to emphasize that these only work in a global situation (which is
wenzelm@35845
  1517
quite rare).
wenzelm@35845
  1518
wenzelm@37144
  1519
* Curried take and drop in library.ML; negative length is interpreted
wenzelm@37144
  1520
as infinity (as in chop).  Subtle INCOMPATIBILITY.
wenzelm@36961
  1521
wenzelm@37351
  1522
* Proof terms: type substitutions on proof constants now use canonical
wenzelm@37351
  1523
order of type variables.  INCOMPATIBILITY for tools working with proof
wenzelm@37351
  1524
terms.
wenzelm@37351
  1525
wenzelm@37351
  1526
* Raw axioms/defs may no longer carry sort constraints, and raw defs
wenzelm@37351
  1527
may no longer carry premises.  User-level specifications are
wenzelm@37351
  1528
transformed accordingly by Thm.add_axiom/add_def.
wenzelm@37351
  1529
haftmann@33993
  1530
wenzelm@34238
  1531
*** System ***
wenzelm@34238
  1532
wenzelm@34238
  1533
* Discontinued special HOL_USEDIR_OPTIONS for the main HOL image;
wenzelm@34238
  1534
ISABELLE_USEDIR_OPTIONS applies uniformly to all sessions.  Note that
wenzelm@34238
  1535
proof terms are enabled unconditionally in the new HOL-Proofs image.
wenzelm@34238
  1536
wenzelm@34255
  1537
* Discontinued old ISABELLE and ISATOOL environment settings (legacy
wenzelm@34255
  1538
feature since Isabelle2009).  Use ISABELLE_PROCESS and ISABELLE_TOOL,
wenzelm@34255
  1539
respectively.
wenzelm@34255
  1540
wenzelm@36201
  1541
* Old lib/scripts/polyml-platform is superseded by the
wenzelm@36201
  1542
ISABELLE_PLATFORM setting variable, which defaults to the 32 bit
wenzelm@36201
  1543
variant, even on a 64 bit machine.  The following example setting
wenzelm@36201
  1544
prefers 64 bit if available:
wenzelm@36201
  1545
wenzelm@36201
  1546
  ML_PLATFORM="${ISABELLE_PLATFORM64:-$ISABELLE_PLATFORM}"
wenzelm@36201
  1547
wenzelm@37218
  1548
* The preliminary Isabelle/jEdit application demonstrates the emerging
wenzelm@37218
  1549
Isabelle/Scala layer for advanced prover interaction and integration.
wenzelm@37218
  1550
See src/Tools/jEdit or "isabelle jedit" provided by the properly built
wenzelm@37218
  1551
component.
wenzelm@37218
  1552
wenzelm@37375
  1553
* "IsabelleText" is a Unicode font derived from Bitstream Vera Mono
wenzelm@37375
  1554
and Bluesky TeX fonts.  It provides the usual Isabelle symbols,
wenzelm@37375
  1555
similar to the default assignment of the document preparation system
wenzelm@37375
  1556
(cf. isabellesym.sty).  The Isabelle/Scala class Isabelle_System
wenzelm@37375
  1557
provides some operations for direct access to the font without asking
wenzelm@37375
  1558
the user for manual installation.
wenzelm@37375
  1559
wenzelm@34238
  1560
haftmann@33993
  1561
wenzelm@33842
  1562
New in Isabelle2009-1 (December 2009)
wenzelm@33842
  1563
-------------------------------------
wenzelm@30904
  1564
wenzelm@31547
  1565
*** General ***
wenzelm@31547
  1566
wenzelm@31547
  1567
* Discontinued old form of "escaped symbols" such as \\<forall>.  Only
wenzelm@31547
  1568
one backslash should be used, even in ML sources.
wenzelm@31547
  1569
wenzelm@31547
  1570
haftmann@30951
  1571
*** Pure ***
haftmann@30951
  1572
ballarin@32846
  1573
* Locale interpretation propagates mixins along the locale hierarchy.
ballarin@32846
  1574
The currently only available mixins are the equations used to map
ballarin@32846
  1575
local definitions to terms of the target domain of an interpretation.
ballarin@32846
  1576
wenzelm@33842
  1577
* Reactivated diagnostic command 'print_interps'.  Use "print_interps
wenzelm@33842
  1578
loc" to print all interpretations of locale "loc" in the theory.
wenzelm@33842
  1579
Interpretations in proofs are not shown.
ballarin@32846
  1580
ballarin@32983
  1581
* Thoroughly revised locales tutorial.  New section on conditional
ballarin@32983
  1582
interpretation.
ballarin@32983
  1583
wenzelm@33843
  1584
* On instantiation of classes, remaining undefined class parameters
wenzelm@33843
  1585
are formally declared.  INCOMPATIBILITY.
wenzelm@33843
  1586
haftmann@30951
  1587
wenzelm@33842
  1588
*** Document preparation ***
wenzelm@33842
  1589
wenzelm@33842
  1590
* New generalized style concept for printing terms: @{foo (style) ...}
wenzelm@33842
  1591
instead of @{foo_style style ...}  (old form is still retained for
wenzelm@33842
  1592
backward compatibility).  Styles can be also applied for
wenzelm@33842
  1593
antiquotations prop, term_type and typeof.
haftmann@32891
  1594
haftmann@32891
  1595
haftmann@30930
  1596
*** HOL ***
haftmann@30930
  1597
wenzelm@33842
  1598
* New proof method "smt" for a combination of first-order logic with
wenzelm@33842
  1599
equality, linear and nonlinear (natural/integer/real) arithmetic, and
wenzelm@33842
  1600
fixed-size bitvectors; there is also basic support for higher-order
wenzelm@33842
  1601
features (esp. lambda abstractions).  It is an incomplete decision
wenzelm@33842
  1602
procedure based on external SMT solvers using the oracle mechanism;
wenzelm@33842
  1603
for the SMT solver Z3, this method is proof-producing.  Certificates
wenzelm@33842
  1604
are provided to avoid calling the external solvers solely for
wenzelm@33842
  1605
re-checking proofs.  Due to a remote SMT service there is no need for
wenzelm@33842
  1606
installing SMT solvers locally.  See src/HOL/SMT.
wenzelm@33842
  1607
wenzelm@33842
  1608
* New commands to load and prove verification conditions generated by
wenzelm@33842
  1609
the Boogie program verifier or derived systems (e.g. the Verifying C
wenzelm@33842
  1610
Compiler (VCC) or Spec#).  See src/HOL/Boogie.
wenzelm@33842
  1611
wenzelm@33842
  1612
* New counterexample generator tool 'nitpick' based on the Kodkod
wenzelm@33842
  1613
relational model finder.  See src/HOL/Tools/Nitpick and
wenzelm@33842
  1614
src/HOL/Nitpick_Examples.
wenzelm@33842
  1615
haftmann@33860
  1616
* New commands 'code_pred' and 'values' to invoke the predicate
haftmann@33860
  1617
compiler and to enumerate values of inductive predicates.
haftmann@33860
  1618
haftmann@33860
  1619
* A tabled implementation of the reflexive transitive closure.
haftmann@33860
  1620
haftmann@33860
  1621
* New implementation of quickcheck uses generic code generator;
haftmann@33860
  1622
default generators are provided for all suitable HOL types, records
haftmann@33860
  1623
and datatypes.  Old quickcheck can be re-activated importing theory
haftmann@33860
  1624
Library/SML_Quickcheck.
haftmann@33860
  1625
wenzelm@33843
  1626
* New testing tool Mirabelle for automated proof tools.  Applies
wenzelm@33843
  1627
several tools and tactics like sledgehammer, metis, or quickcheck, to
wenzelm@33843
  1628
every proof step in a theory.  To be used in batch mode via the
wenzelm@33843
  1629
"mirabelle" utility.
wenzelm@33843
  1630
wenzelm@33843
  1631
* New proof method "sos" (sum of squares) for nonlinear real
wenzelm@33843
  1632
arithmetic (originally due to John Harison). It requires theory
wenzelm@33843
  1633
Library/Sum_Of_Squares.  It is not a complete decision procedure but
wenzelm@33843
  1634
works well in practice on quantifier-free real arithmetic with +, -,
wenzelm@33843
  1635
*, ^, =, <= and <, i.e. boolean combinations of equalities and
wenzelm@33843
  1636
inequalities between polynomials.  It makes use of external
wenzelm@33843
  1637
semidefinite programming solvers.  Method "sos" generates a
wenzelm@33843
  1638
certificate that can be pasted into the proof thus avoiding the need
wenzelm@33843
  1639
to call an external tool every time the proof is checked.  See
wenzelm@33843
  1640
src/HOL/Library/Sum_Of_Squares.
wenzelm@33843
  1641
wenzelm@33843
  1642
* New method "linarith" invokes existing linear arithmetic decision
wenzelm@33843
  1643
procedure only.
wenzelm@33843
  1644
wenzelm@33843
  1645
* New command 'atp_minimal' reduces result produced by Sledgehammer.
wenzelm@33843
  1646
wenzelm@33843
  1647
* New Sledgehammer option "Full Types" in Proof General settings menu.
wenzelm@33843
  1648
Causes full type information to be output to the ATPs.  This slows
wenzelm@33843
  1649
ATPs down considerably but eliminates a source of unsound "proofs"
wenzelm@33843
  1650
that fail later.
wenzelm@33843
  1651
wenzelm@33843
  1652
* New method "metisFT": A version of metis that uses full type
wenzelm@33843
  1653
information in order to avoid failures of proof reconstruction.
wenzelm@33843
  1654
wenzelm@33843
  1655
* New evaluator "approximate" approximates an real valued term using
wenzelm@33843
  1656
the same method as the approximation method.
wenzelm@33843
  1657
wenzelm@33843
  1658
* Method "approximate" now supports arithmetic expressions as
wenzelm@33843
  1659
boundaries of intervals and implements interval splitting and Taylor
wenzelm@33843
  1660
series expansion.
wenzelm@33843
  1661
wenzelm@33843
  1662
* ML antiquotation @{code_datatype} inserts definition of a datatype
wenzelm@33843
  1663
generated by the code generator; e.g. see src/HOL/Predicate.thy.
wenzelm@33843
  1664
haftmann@33860
  1665
* New theory SupInf of the supremum and infimum operators for sets of
haftmann@33860
  1666
reals.
haftmann@33860
  1667
haftmann@33860
  1668
* New theory Probability, which contains a development of measure
haftmann@33860
  1669
theory, eventually leading to Lebesgue integration and probability.
haftmann@33860
  1670
haftmann@33860
  1671
* Extended Multivariate Analysis to include derivation and Brouwer's
haftmann@33860
  1672
fixpoint theorem.
wenzelm@33843
  1673
wenzelm@33842
  1674
* Reorganization of number theory, INCOMPATIBILITY:
wenzelm@33873
  1675
  - new number theory development for nat and int, in theories Divides
wenzelm@33873
  1676
    and GCD as well as in new session Number_Theory
wenzelm@33873
  1677
  - some constants and facts now suffixed with _nat and _int
wenzelm@33873
  1678
    accordingly
wenzelm@33873
  1679
  - former session NumberTheory now named Old_Number_Theory, including
wenzelm@33873
  1680
    theories Legacy_GCD and Primes (prefer Number_Theory if possible)
wenzelm@33842
  1681
  - moved theory Pocklington from src/HOL/Library to
wenzelm@33842
  1682
    src/HOL/Old_Number_Theory
haftmann@32479
  1683
wenzelm@33873
  1684
* Theory GCD includes functions Gcd/GCD and Lcm/LCM for the gcd and
wenzelm@33873
  1685
lcm of finite and infinite sets. It is shown that they form a complete
haftmann@32600
  1686
lattice.
haftmann@32600
  1687
haftmann@32600
  1688
* Class semiring_div requires superclass no_zero_divisors and proof of
haftmann@32600
  1689
div_mult_mult1; theorems div_mult_mult1, div_mult_mult2,
haftmann@32600
  1690
div_mult_mult1_if, div_mult_mult1 and div_mult_mult2 have been
haftmann@32600
  1691
generalized to class semiring_div, subsuming former theorems
haftmann@32600
  1692
zdiv_zmult_zmult1, zdiv_zmult_zmult1_if, zdiv_zmult_zmult1 and
haftmann@32600
  1693
zdiv_zmult_zmult2.  div_mult_mult1 is now [simp] by default.
haftmann@32600
  1694
INCOMPATIBILITY.
haftmann@32600
  1695
haftmann@32588
  1696
* Refinements to lattice classes and sets:
haftmann@32064
  1697
  - less default intro/elim rules in locale variant, more default
haftmann@32064
  1698
    intro/elim rules in class variant: more uniformity
wenzelm@33842
  1699
  - lemma ge_sup_conv renamed to le_sup_iff, in accordance with
wenzelm@33842
  1700
    le_inf_iff
wenzelm@33842
  1701
  - dropped lemma alias inf_ACI for inf_aci (same for sup_ACI and
wenzelm@33842
  1702
    sup_aci)
haftmann@32064
  1703
  - renamed ACI to inf_sup_aci
haftmann@32600
  1704
  - new class "boolean_algebra"
wenzelm@33842
  1705
  - class "complete_lattice" moved to separate theory
haftmann@33860
  1706
    "Complete_Lattice"; corresponding constants (and abbreviations)
wenzelm@33842
  1707
    renamed and with authentic syntax:
haftmann@33860
  1708
    Set.Inf ~>    Complete_Lattice.Inf
haftmann@33860
  1709
    Set.Sup ~>    Complete_Lattice.Sup
haftmann@33860
  1710
    Set.INFI ~>   Complete_Lattice.INFI
haftmann@33860
  1711
    Set.SUPR ~>   Complete_Lattice.SUPR
haftmann@33860
  1712
    Set.Inter ~>  Complete_Lattice.Inter
haftmann@33860
  1713
    Set.Union ~>  Complete_Lattice.Union
haftmann@33860
  1714
    Set.INTER ~>  Complete_Lattice.INTER
haftmann@33860
  1715
    Set.UNION ~>  Complete_Lattice.UNION
haftmann@32600
  1716
  - authentic syntax for
haftmann@32600
  1717
    Set.Pow
haftmann@32600
  1718
    Set.image
haftmann@32588
  1719
  - mere abbreviations:
haftmann@32588
  1720
    Set.empty               (for bot)
haftmann@32588
  1721
    Set.UNIV                (for top)
haftmann@33860
  1722
    Set.inter               (for inf, formerly Set.Int)
haftmann@33860
  1723
    Set.union               (for sup, formerly Set.Un)
haftmann@32588
  1724
    Complete_Lattice.Inter  (for Inf)
haftmann@32588
  1725
    Complete_Lattice.Union  (for Sup)
haftmann@32606
  1726
    Complete_Lattice.INTER  (for INFI)
haftmann@32606
  1727
    Complete_Lattice.UNION  (for SUPR)
haftmann@32600
  1728
  - object-logic definitions as far as appropriate
haftmann@32217
  1729
haftmann@32691
  1730
INCOMPATIBILITY.  Care is required when theorems Int_subset_iff or
wenzelm@33842
  1731
Un_subset_iff are explicitly deleted as default simp rules; then also
wenzelm@33842
  1732
their lattice counterparts le_inf_iff and le_sup_iff have to be
haftmann@32691
  1733
deleted to achieve the desired effect.
haftmann@32064
  1734
wenzelm@33842
  1735
* Rules inf_absorb1, inf_absorb2, sup_absorb1, sup_absorb2 are no simp
wenzelm@33842
  1736
rules by default any longer; the same applies to min_max.inf_absorb1
wenzelm@33842
  1737
etc.  INCOMPATIBILITY.
wenzelm@33842
  1738
wenzelm@33842
  1739
* Rules sup_Int_eq and sup_Un_eq are no longer declared as
wenzelm@33842
  1740
pred_set_conv by default.  INCOMPATIBILITY.
wenzelm@33842
  1741
wenzelm@33842
  1742
* Power operations on relations and functions are now one dedicated
haftmann@32706
  1743
constant "compow" with infix syntax "^^".  Power operation on
wenzelm@31547
  1744
multiplicative monoids retains syntax "^" and is now defined generic
wenzelm@31547
  1745
in class power.  INCOMPATIBILITY.
wenzelm@31547
  1746
wenzelm@33842
  1747
* Relation composition "R O S" now has a more standard argument order:
wenzelm@33842
  1748
"R O S = {(x, z). EX y. (x, y) : R & (y, z) : S}".  INCOMPATIBILITY,
wenzelm@33842
  1749
rewrite propositions with "S O R" --> "R O S". Proofs may occasionally
wenzelm@33842
  1750
break, since the O_assoc rule was not rewritten like this.  Fix using
wenzelm@33842
  1751
O_assoc[symmetric].  The same applies to the curried version "R OO S".
wenzelm@32427
  1752
nipkow@33057
  1753
* Function "Inv" is renamed to "inv_into" and function "inv" is now an
wenzelm@33842
  1754
abbreviation for "inv_into UNIV".  Lemmas are renamed accordingly.
nipkow@32988
  1755
INCOMPATIBILITY.
nipkow@32988
  1756
haftmann@33860
  1757
* Most rules produced by inductive and datatype package have mandatory
haftmann@33860
  1758
prefixes.  INCOMPATIBILITY.
nipkow@31790
  1759
wenzelm@33842
  1760
* Changed "DERIV_intros" to a dynamic fact, which can be augmented by
wenzelm@33842
  1761
the attribute of the same name.  Each of the theorems in the list
wenzelm@33842
  1762
DERIV_intros assumes composition with an additional function and
wenzelm@33842
  1763
matches a variable to the derivative, which has to be solved by the
wenzelm@33842
  1764
Simplifier.  Hence (auto intro!: DERIV_intros) computes the derivative
wenzelm@33873
  1765
of most elementary terms.  Former Maclauren.DERIV_tac and
wenzelm@33873
  1766
Maclauren.deriv_tac should be replaced by (auto intro!: DERIV_intros).
wenzelm@33873
  1767
INCOMPATIBILITY.
haftmann@33860
  1768
haftmann@33860
  1769
* Code generator attributes follow the usual underscore convention:
haftmann@33860
  1770
    code_unfold     replaces    code unfold
haftmann@33860
  1771
    code_post       replaces    code post
haftmann@33860
  1772
    etc.
haftmann@33860
  1773
  INCOMPATIBILITY.
wenzelm@31900
  1774
krauss@33471
  1775
* Renamed methods:
krauss@33471
  1776
    sizechange -> size_change
krauss@33471
  1777
    induct_scheme -> induction_schema
haftmann@33860
  1778
  INCOMPATIBILITY.
nipkow@33673
  1779
wenzelm@33843
  1780
* Discontinued abbreviation "arbitrary" of constant "undefined".
wenzelm@33843
  1781
INCOMPATIBILITY, use "undefined" directly.
wenzelm@33843
  1782
haftmann@33860
  1783
* Renamed theorems:
haftmann@33860
  1784
    Suc_eq_add_numeral_1 -> Suc_eq_plus1
haftmann@33860
  1785
    Suc_eq_add_numeral_1_left -> Suc_eq_plus1_left
haftmann@33860
  1786
    Suc_plus1 -> Suc_eq_plus1
haftmann@33860
  1787
    *anti_sym -> *antisym*
haftmann@33860
  1788
    vector_less_eq_def -> vector_le_def
haftmann@33860
  1789
  INCOMPATIBILITY.
haftmann@33860
  1790
haftmann@33860
  1791
* Added theorem List.map_map as [simp].  Removed List.map_compose.
haftmann@33860
  1792
INCOMPATIBILITY.
haftmann@33860
  1793
haftmann@33860
  1794
* Removed predicate "M hassize n" (<--> card M = n & finite M).
haftmann@33860
  1795
INCOMPATIBILITY.
haftmann@33860
  1796
hoelzl@31812
  1797
huffman@33825
  1798
*** HOLCF ***
huffman@33825
  1799
wenzelm@33842
  1800
* Theory Representable defines a class "rep" of domains that are
wenzelm@33842
  1801
representable (via an ep-pair) in the universal domain type "udom".
huffman@33825
  1802
Instances are provided for all type constructors defined in HOLCF.
huffman@33825
  1803
huffman@33825
  1804
* The 'new_domain' command is a purely definitional version of the
huffman@33825
  1805
domain package, for representable domains.  Syntax is identical to the
huffman@33825
  1806
old domain package.  The 'new_domain' package also supports indirect
huffman@33825
  1807
recursion using previously-defined type constructors.  See
wenzelm@33842
  1808
src/HOLCF/ex/New_Domain.thy for examples.
wenzelm@33842
  1809
wenzelm@33842
  1810
* Method "fixrec_simp" unfolds one step of a fixrec-defined constant
huffman@33825
  1811
on the left-hand side of an equation, and then performs
huffman@33825
  1812
simplification.  Rewriting is done using rules declared with the
wenzelm@33842
  1813
"fixrec_simp" attribute.  The "fixrec_simp" method is intended as a
wenzelm@33842
  1814
replacement for "fixpat"; see src/HOLCF/ex/Fixrec_ex.thy for examples.
huffman@33825
  1815
huffman@33825
  1816
* The pattern-match compiler in 'fixrec' can now handle constructors
huffman@33825
  1817
with HOL function types.  Pattern-match combinators for the Pair
huffman@33825
  1818
constructor are pre-configured.
huffman@33825
  1819
huffman@33825
  1820
* The 'fixrec' package now produces better fixed-point induction rules
huffman@33825
  1821
for mutually-recursive definitions:  Induction rules have conclusions
huffman@33825
  1822
of the form "P foo bar" instead of "P <foo, bar>".
huffman@33825
  1823
huffman@33825
  1824
* The constant "sq_le" (with infix syntax "<<" or "\<sqsubseteq>") has
huffman@33825
  1825
been renamed to "below".  The name "below" now replaces "less" in many
wenzelm@33842
  1826
theorem names.  (Legacy theorem names using "less" are still supported
wenzelm@33842
  1827
as well.)
huffman@33825
  1828
huffman@33825
  1829
* The 'fixrec' package now supports "bottom patterns".  Bottom
huffman@33825
  1830
patterns can be used to generate strictness rules, or to make
huffman@33825
  1831
functions more strict (much like the bang-patterns supported by the
wenzelm@33873
  1832
Glasgow Haskell Compiler).  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@33873
  1833
examples.
huffman@33825
  1834
huffman@33825
  1835
wenzelm@31304
  1836
*** ML ***
wenzelm@31304
  1837
wenzelm@33843
  1838
* Support for Poly/ML 5.3.0, with improved reporting of compiler
wenzelm@33843
  1839
errors and run-time exceptions, including detailed source positions.
wenzelm@33843
  1840
wenzelm@33843
  1841
* Structure Name_Space (formerly NameSpace) now manages uniquely
wenzelm@33843
  1842
identified entries, with some additional information such as source
wenzelm@33843
  1843
position, logical grouping etc.
wenzelm@33843
  1844
wenzelm@33524
  1845
* Theory and context data is now introduced by the simplified and
wenzelm@33524
  1846
modernized functors Theory_Data, Proof_Data, Generic_Data.  Data needs
wenzelm@33524
  1847
to be pure, but the old TheoryDataFun for mutable data (with explicit
wenzelm@33524
  1848
copy operation) is still available for some time.
wenzelm@33524
  1849
wenzelm@32742
  1850
* Structure Synchronized (cf. src/Pure/Concurrent/synchronized.ML)
wenzelm@32742
  1851
provides a high-level programming interface to synchronized state
wenzelm@32742
  1852
variables with atomic update.  This works via pure function
wenzelm@32742
  1853
application within a critical section -- its runtime should be as
wenzelm@32742
  1854
short as possible; beware of deadlocks if critical code is nested,
wenzelm@32742
  1855
either directly or indirectly via other synchronized variables!
wenzelm@32742
  1856
wenzelm@32742
  1857
* Structure Unsynchronized (cf. src/Pure/ML-Systems/unsynchronized.ML)
wenzelm@32742
  1858
wraps raw ML references, explicitly indicating their non-thread-safe
wenzelm@32742
  1859
behaviour.  The Isar toplevel keeps this structure open, to
wenzelm@32742
  1860
accommodate Proof General as well as quick and dirty interactive
wenzelm@32742
  1861
experiments with references.
wenzelm@32742
  1862
wenzelm@32365
  1863
* PARALLEL_CHOICE and PARALLEL_GOALS provide basic support for
wenzelm@32365
  1864
parallel tactical reasoning.
wenzelm@32365
  1865
wenzelm@32427
  1866
* Tacticals Subgoal.FOCUS, Subgoal.FOCUS_PREMS, Subgoal.FOCUS_PARAMS
wenzelm@32427
  1867
are similar to SUBPROOF, but are slightly more flexible: only the
wenzelm@32427
  1868
specified parts of the subgoal are imported into the context, and the
wenzelm@32427
  1869
body tactic may introduce new subgoals and schematic variables.
wenzelm@32427
  1870
wenzelm@32427
  1871
* Old tactical METAHYPS, which does not observe the proof context, has
wenzelm@32427
  1872
been renamed to Old_Goals.METAHYPS and awaits deletion.  Use SUBPROOF
wenzelm@32427
  1873
or Subgoal.FOCUS etc.
wenzelm@32216
  1874
wenzelm@31971
  1875
* Renamed functor TableFun to Table, and GraphFun to Graph.  (Since
wenzelm@31971
  1876
functors have their own ML name space there is no point to mark them
wenzelm@31971
  1877
separately.)  Minor INCOMPATIBILITY.
wenzelm@31971
  1878
wenzelm@31901
  1879
* Renamed NamedThmsFun to Named_Thms.  INCOMPATIBILITY.
wenzelm@31901
  1880
wenzelm@33842
  1881
* Renamed several structures FooBar to Foo_Bar.  Occasional,
wenzelm@33842
  1882
INCOMPATIBILITY.
wenzelm@33842
  1883
wenzelm@33843
  1884
* Operations of structure Skip_Proof no longer require quick_and_dirty
wenzelm@33843
  1885
mode, which avoids critical setmp.
wenzelm@33843
  1886
wenzelm@31306
  1887
* Eliminated old Attrib.add_attributes, Method.add_methods and related
wenzelm@33842
  1888
combinators for "args".  INCOMPATIBILITY, need to use simplified
wenzelm@31306
  1889
Attrib/Method.setup introduced in Isabelle2009.
wenzelm@31304
  1890
wenzelm@32151
  1891
* Proper context for simpset_of, claset_of, clasimpset_of.  May fall
wenzelm@32151
  1892
back on global_simpset_of, global_claset_of, global_clasimpset_of as
wenzelm@32151
  1893
last resort.  INCOMPATIBILITY.
wenzelm@32151
  1894
wenzelm@32092
  1895
* Display.pretty_thm now requires a proper context (cf. former
wenzelm@32092
  1896
ProofContext.pretty_thm).  May fall back on Display.pretty_thm_global
wenzelm@32092
  1897
or even Display.pretty_thm_without_context as last resort.
wenzelm@32092
  1898
INCOMPATIBILITY.
wenzelm@32092
  1899
wenzelm@32433
  1900
* Discontinued Display.pretty_ctyp/cterm etc.  INCOMPATIBILITY, use
wenzelm@32433
  1901
Syntax.pretty_typ/term directly, preferably with proper context
wenzelm@32433
  1902
instead of global theory.
wenzelm@32433
  1903
wenzelm@31304
  1904
wenzelm@31308
  1905
*** System ***
wenzelm@31308
  1906
wenzelm@33842
  1907
* Further fine tuning of parallel proof checking, scales up to 8 cores
wenzelm@33842
  1908
(max. speedup factor 5.0).  See also Goal.parallel_proofs in ML and
wenzelm@33842
  1909
usedir option -q.
wenzelm@33842
  1910
wenzelm@32326
  1911
* Support for additional "Isabelle components" via etc/components, see
wenzelm@32326
  1912
also the system manual.
wenzelm@32326
  1913
wenzelm@32326
  1914
* The isabelle makeall tool now operates on all components with
wenzelm@32326
  1915
IsaMakefile, not just hardwired "logics".
wenzelm@32326
  1916
wenzelm@33842
  1917
* Removed "compress" option from isabelle-process and isabelle usedir;
wenzelm@33842
  1918
this is always enabled.
kleing@33818
  1919
wenzelm@31308
  1920
* Discontinued support for Poly/ML 4.x versions.
wenzelm@31308
  1921
wenzelm@33842
  1922
* Isabelle tool "wwwfind" provides web interface for 'find_theorems'
wenzelm@33842
  1923
on a given logic image.  This requires the lighttpd webserver and is
wenzelm@33842
  1924
currently supported on Linux only.
wenzelm@32061
  1925
wenzelm@31308
  1926
wenzelm@31304
  1927
wenzelm@30845
  1928
New in Isabelle2009 (April 2009)
wenzelm@30845
  1929
--------------------------------
haftmann@27104
  1930
wenzelm@27599
  1931
*** General ***
wenzelm@27599
  1932
wenzelm@28504
  1933
* Simplified main Isabelle executables, with less surprises on
wenzelm@28504
  1934
case-insensitive file-systems (such as Mac OS).
wenzelm@28504
  1935
wenzelm@28504
  1936
  - The main Isabelle tool wrapper is now called "isabelle" instead of
wenzelm@28504
  1937
    "isatool."
wenzelm@28504
  1938
wenzelm@28504
  1939
  - The former "isabelle" alias for "isabelle-process" has been
wenzelm@28504
  1940
    removed (should rarely occur to regular users).
wenzelm@28504
  1941
wenzelm@28915
  1942
  - The former "isabelle-interface" and its alias "Isabelle" have been
wenzelm@28915
  1943
    removed (interfaces are now regular Isabelle tools).
wenzelm@28504
  1944
wenzelm@28504
  1945
Within scripts and make files, the Isabelle environment variables
wenzelm@28504
  1946
ISABELLE_TOOL and ISABELLE_PROCESS replace old ISATOOL and ISABELLE,
wenzelm@28504
  1947
respectively.  (The latter are still available as legacy feature.)
wenzelm@28504
  1948
wenzelm@28915
  1949
The old isabelle-interface wrapper could react in confusing ways if
wenzelm@28915
  1950
the interface was uninstalled or changed otherwise.  Individual
wenzelm@28915
  1951
interface tool configuration is now more explicit, see also the
wenzelm@28915
  1952
Isabelle system manual.  In particular, Proof General is now available
wenzelm@28915
  1953
via "isabelle emacs".
wenzelm@28504
  1954
wenzelm@28504
  1955
INCOMPATIBILITY, need to adapt derivative scripts.  Users may need to
wenzelm@28504
  1956
purge installed copies of Isabelle executables and re-run "isabelle
wenzelm@28504
  1957
install -p ...", or use symlinks.
wenzelm@28504
  1958
wenzelm@28914
  1959
* The default for ISABELLE_HOME_USER is now ~/.isabelle instead of the
wenzelm@30845
  1960
old ~/isabelle, which was slightly non-standard and apt to cause
wenzelm@30845
  1961
surprises on case-insensitive file-systems (such as Mac OS).
wenzelm@28914
  1962
wenzelm@28914
  1963
INCOMPATIBILITY, need to move existing ~/isabelle/etc,
wenzelm@28914
  1964
~/isabelle/heaps, ~/isabelle/browser_info to the new place.  Special
wenzelm@28914
  1965
care is required when using older releases of Isabelle.  Note that
wenzelm@28914
  1966
ISABELLE_HOME_USER can be changed in Isabelle/etc/settings of any
wenzelm@30845
  1967
Isabelle distribution, in order to use the new ~/.isabelle uniformly.
wenzelm@28914
  1968
wenzelm@29161
  1969
* Proofs of fully specified statements are run in parallel on
wenzelm@30845
  1970
multi-core systems.  A speedup factor of 2.5 to 3.2 can be expected on
wenzelm@30845
  1971
a regular 4-core machine, if the initial heap space is made reasonably
wenzelm@30845
  1972
large (cf. Poly/ML option -H).  (Requires Poly/ML 5.2.1 or later.)
wenzelm@30845
  1973
wenzelm@30845
  1974
* The main reference manuals ("isar-ref", "implementation", and
wenzelm@30845
  1975
"system") have been updated and extended.  Formally checked references
wenzelm@30845
  1976
as hyperlinks are now available uniformly.
wenzelm@30845
  1977
wenzelm@30163
  1978
wenzelm@27599
  1979
*** Pure ***
wenzelm@27599
  1980
wenzelm@30845
  1981
* Complete re-implementation of locales.  INCOMPATIBILITY in several
wenzelm@30845
  1982
respects.  The most important changes are listed below.  See the
wenzelm@30845
  1983
Tutorial on Locales ("locales" manual) for details.
ballarin@29253
  1984
ballarin@29253
  1985
- In locale expressions, instantiation replaces renaming.  Parameters
ballarin@29253
  1986
must be declared in a for clause.  To aid compatibility with previous
ballarin@29253
  1987
parameter inheritance, in locale declarations, parameters that are not
ballarin@29253
  1988
'touched' (instantiation position "_" or omitted) are implicitly added
ballarin@29253
  1989
with their syntax at the beginning of the for clause.
ballarin@29253
  1990
ballarin@29253
  1991
- Syntax from abbreviations and definitions in locales is available in
ballarin@29253
  1992
locale expressions and context elements.  The latter is particularly
ballarin@29253
  1993
useful in locale declarations.
ballarin@29253
  1994
ballarin@29253
  1995
- More flexible mechanisms to qualify names generated by locale
ballarin@29253
  1996
expressions.  Qualifiers (prefixes) may be specified in locale
wenzelm@30728
  1997
expressions, and can be marked as mandatory (syntax: "name!:") or
wenzelm@30728
  1998
optional (syntax "name?:").  The default depends for plain "name:"
wenzelm@30728
  1999
depends on the situation where a locale expression is used: in
wenzelm@30728
  2000
commands 'locale' and 'sublocale' prefixes are optional, in
wenzelm@30845
  2001
'interpretation' and 'interpret' prefixes are mandatory.  The old
wenzelm@30728
  2002
implicit qualifiers derived from the parameter names of a locale are
wenzelm@30728
  2003
no longer generated.
wenzelm@30106
  2004
wenzelm@30845
  2005
- Command "sublocale l < e" replaces "interpretation l < e".  The
wenzelm@30106
  2006
instantiation clause in "interpretation" and "interpret" (square
wenzelm@30106
  2007
brackets) is no longer available.  Use locale expressions.
ballarin@29253
  2008
wenzelm@30845
  2009
- When converting proof scripts, mandatory qualifiers in
wenzelm@30728
  2010
'interpretation' and 'interpret' should be retained by default, even
wenzelm@30845
  2011
if this is an INCOMPATIBILITY compared to former behavior.  In the
wenzelm@30845
  2012
worst case, use the "name?:" form for non-mandatory ones.  Qualifiers
wenzelm@30845
  2013
in locale expressions range over a single locale instance only.
wenzelm@30845
  2014
wenzelm@30845
  2015
- Dropped locale element "includes".  This is a major INCOMPATIBILITY.
wenzelm@30845
  2016
In existing theorem specifications replace the includes element by the
wenzelm@30845
  2017
respective context elements of the included locale, omitting those
wenzelm@30845
  2018
that are already present in the theorem specification.  Multiple
wenzelm@30845
  2019
assume elements of a locale should be replaced by a single one
wenzelm@30845
  2020
involving the locale predicate.  In the proof body, declarations (most
wenzelm@30845
  2021
notably theorems) may be regained by interpreting the respective
wenzelm@30845
  2022
locales in the proof context as required (command "interpret").
wenzelm@30845
  2023
wenzelm@30845
  2024
If using "includes" in replacement of a target solely because the
wenzelm@30845
  2025
parameter types in the theorem are not as general as in the target,
wenzelm@30845
  2026
consider declaring a new locale with additional type constraints on
wenzelm@30845
  2027
the parameters (context element "constrains").
wenzelm@30845
  2028
wenzelm@30845
  2029
- Discontinued "locale (open)".  INCOMPATIBILITY.
wenzelm@30845
  2030
wenzelm@30845
  2031
- Locale interpretation commands no longer attempt to simplify goal.
wenzelm@30845
  2032
INCOMPATIBILITY: in rare situations the generated goal differs.  Use
wenzelm@30845
  2033
methods intro_locales and unfold_locales to clarify.
wenzelm@30845
  2034
wenzelm@30845
  2035
- Locale interpretation commands no longer accept interpretation
wenzelm@30845
  2036
attributes.  INCOMPATIBILITY.
wenzelm@30845
  2037
wenzelm@30845
  2038
* Class declaration: so-called "base sort" must not be given in import
wenzelm@30845
  2039
list any longer, but is inferred from the specification.  Particularly
wenzelm@30845
  2040
in HOL, write
wenzelm@30845
  2041
wenzelm@30845
  2042
    class foo = ...
wenzelm@30845
  2043
wenzelm@30845
  2044
instead of
wenzelm@30845
  2045
wenzelm@30845
  2046
    class foo = type + ...
wenzelm@30845
  2047
wenzelm@30845
  2048
* Class target: global versions of theorems stemming do not carry a
wenzelm@30845
  2049
parameter prefix any longer.  INCOMPATIBILITY.
wenzelm@30845
  2050
wenzelm@30845
  2051
* Class 'instance' command no longer accepts attached definitions.
wenzelm@30845
  2052
INCOMPATIBILITY, use proper 'instantiation' target instead.
wenzelm@30845
  2053
wenzelm@30845
  2054
* Recovered hiding of consts, which was accidentally broken in
wenzelm@30845
  2055
Isabelle2007.  Potential INCOMPATIBILITY, ``hide const c'' really
wenzelm@30845
  2056
makes c inaccessible; consider using ``hide (open) const c'' instead.
wenzelm@30845
  2057
wenzelm@30845
  2058
* Slightly more coherent Pure syntax, with updated documentation in
wenzelm@30845
  2059
isar-ref manual.  Removed locales meta_term_syntax and
wenzelm@30845
  2060
meta_conjunction_syntax: TERM and &&& (formerly &&) are now permanent,
wenzelm@30845
  2061
INCOMPATIBILITY in rare situations.  Note that &&& should not be used
wenzelm@30845
  2062
directly in regular applications.
wenzelm@30845
  2063
wenzelm@30845
  2064
* There is a new syntactic category "float_const" for signed decimal
wenzelm@30845
  2065
fractions (e.g. 123.45 or -123.45).
wenzelm@30845
  2066
wenzelm@30845
  2067
* Removed exotic 'token_translation' command.  INCOMPATIBILITY, use ML
wenzelm@30845
  2068
interface with 'setup' command instead.
wenzelm@30845
  2069
wenzelm@30845
  2070
* Command 'local_setup' is similar to 'setup', but operates on a local
wenzelm@30845
  2071
theory context.
haftmann@27104
  2072
wenzelm@28114
  2073
* The 'axiomatization' command now only works within a global theory
wenzelm@28114
  2074
context.  INCOMPATIBILITY.
wenzelm@28114
  2075
wenzelm@30845
  2076
* Goal-directed proof now enforces strict proof irrelevance wrt. sort
wenzelm@30845
  2077
hypotheses.  Sorts required in the course of reasoning need to be
wenzelm@30845
  2078
covered by the constraints in the initial statement, completed by the
wenzelm@30845
  2079
type instance information of the background theory.  Non-trivial sort
wenzelm@30845
  2080
hypotheses, which rarely occur in practice, may be specified via
wenzelm@30845
  2081
vacuous propositions of the form SORT_CONSTRAINT('a::c).  For example:
wenzelm@30845
  2082
wenzelm@30845
  2083
  lemma assumes "SORT_CONSTRAINT('a::empty)" shows False ...
wenzelm@30845
  2084
wenzelm@30845
  2085
The result contains an implicit sort hypotheses as before --
wenzelm@30845
  2086
SORT_CONSTRAINT premises are eliminated as part of the canonical rule
wenzelm@30845
  2087
normalization.
wenzelm@30845
  2088
wenzelm@30845
  2089
* Generalized Isar history, with support for linear undo, direct state
wenzelm@30845
  2090
addressing etc.
wenzelm@30845
  2091
wenzelm@30845
  2092
* Changed defaults for unify configuration options:
wenzelm@30845
  2093
wenzelm@30845
  2094
  unify_trace_bound = 50 (formerly 25)
wenzelm@30845
  2095
  unify_search_bound = 60 (formerly 30)
wenzelm@30845
  2096
wenzelm@30845
  2097
* Different bookkeeping for code equations (INCOMPATIBILITY):
wenzelm@30845
  2098
wenzelm@30845
  2099
  a) On theory merge, the last set of code equations for a particular
wenzelm@30845
  2100
     constant is taken (in accordance with the policy applied by other
wenzelm@30845
  2101
     parts of the code generator framework).
wenzelm@30845
  2102
wenzelm@30845
  2103
  b) Code equations stemming from explicit declarations (e.g. code
wenzelm@30845
  2104
     attribute) gain priority over default code equations stemming
wenzelm@30845
  2105
     from definition, primrec, fun etc.
wenzelm@30845
  2106
wenzelm@30845
  2107
* Keyword 'code_exception' now named 'code_abort'.  INCOMPATIBILITY.
wenzelm@30845
  2108
haftmann@30965
  2109
* Unified theorem tables for both code generators.  Thus [code
wenzelm@30845
  2110
func] has disappeared and only [code] remains.  INCOMPATIBILITY.
wenzelm@30577
  2111
wenzelm@30577
  2112
* Command 'find_consts' searches for constants based on type and name
wenzelm@30577
  2113
patterns, e.g.
kleing@29883
  2114
kleing@29883
  2115
    find_consts "_ => bool"
kleing@29883
  2116
wenzelm@30106
  2117
By default, matching is against subtypes, but it may be restricted to
wenzelm@30728
  2118
the whole type.  Searching by name is possible.  Multiple queries are
wenzelm@30106
  2119
conjunctive and queries may be negated by prefixing them with a
wenzelm@30106
  2120
hyphen:
kleing@29883
  2121
kleing@29883
  2122
    find_consts strict: "_ => bool" name: "Int" -"int => int"
kleing@29861
  2123
wenzelm@30845
  2124
* New 'find_theorems' criterion "solves" matches theorems that
wenzelm@30845
  2125
directly solve the current goal (modulo higher-order unification).
wenzelm@30845
  2126
wenzelm@30845
  2127
* Auto solve feature for main theorem statements: whenever a new goal
wenzelm@30845
  2128
is stated, "find_theorems solves" is called; any theorems that could
wenzelm@30845
  2129
solve the lemma directly are listed as part of the goal state.
wenzelm@30845
  2130
Cf. associated options in Proof General Isabelle settings menu,
wenzelm@30845
  2131
enabled by default, with reasonable timeout for pathological cases of
wenzelm@30845
  2132
higher-order unification.
webertj@30415
  2133
haftmann@27104
  2134
wenzelm@27381
  2135
*** Document preparation ***
wenzelm@27381
  2136
wenzelm@27381
  2137
* Antiquotation @{lemma} now imitates a regular terminal proof,
wenzelm@27392
  2138
demanding keyword 'by' and supporting the full method expression
wenzelm@27519
  2139
syntax just like the Isar command 'by'.
wenzelm@27381
  2140
wenzelm@27381
  2141
haftmann@27104
  2142
*** HOL ***
haftmann@27104
  2143
wenzelm@30845
  2144
* Integrated main parts of former image HOL-Complex with HOL.  Entry
wenzelm@30845
  2145
points Main and Complex_Main remain as before.
wenzelm@30845
  2146
wenzelm@30845
  2147
* Logic image HOL-Plain provides a minimal HOL with the most important
wenzelm@30845
  2148
tools available (inductive, datatype, primrec, ...).  This facilitates
wenzelm@30845
  2149
experimentation and tool development.  Note that user applications
wenzelm@30845
  2150
(and library theories) should never refer to anything below theory
wenzelm@30845
  2151
Main, as before.
wenzelm@30845
  2152
wenzelm@30845
  2153
* Logic image HOL-Main stops at theory Main, and thus facilitates
wenzelm@30845
  2154
experimentation due to shorter build times.
wenzelm@30845
  2155
wenzelm@30845
  2156
* Logic image HOL-NSA contains theories of nonstandard analysis which
wenzelm@30845
  2157
were previously part of former HOL-Complex.  Entry point Hyperreal
wenzelm@30845
  2158
remains valid, but theories formerly using Complex_Main should now use
wenzelm@30845
  2159
new entry point Hypercomplex.
wenzelm@30845
  2160
wenzelm@30845
  2161
* Generic ATP manager for Sledgehammer, based on ML threads instead of
wenzelm@30845
  2162
Posix processes.  Avoids potentially expensive forking of the ML
wenzelm@30845
  2163
process.  New thread-based implementation also works on non-Unix
wenzelm@30845
  2164
platforms (Cygwin).  Provers are no longer hardwired, but defined
wenzelm@30845
  2165
within the theory via plain ML wrapper functions.  Basic Sledgehammer
wenzelm@30845
  2166
commands are covered in the isar-ref manual.
wenzelm@30845
  2167
wenzelm@30845
  2168
* Wrapper scripts for remote SystemOnTPTP service allows to use
wenzelm@30845
  2169
sledgehammer without local ATP installation (Vampire etc.). Other
wenzelm@30845
  2170
provers may be included via suitable ML wrappers, see also
wenzelm@30845
  2171
src/HOL/ATP_Linkup.thy.
wenzelm@30845
  2172
wenzelm@30845
  2173
* ATP selection (E/Vampire/Spass) is now via Proof General's settings
wenzelm@30845
  2174
menu.
wenzelm@30845
  2175
wenzelm@30845
  2176
* The metis method no longer fails because the theorem is too trivial
wenzelm@30845
  2177
(contains the empty clause).
wenzelm@30845
  2178
wenzelm@30845
  2179
* The metis method now fails in the usual manner, rather than raising
wenzelm@30845
  2180
an exception, if it determines that it cannot prove the theorem.
wenzelm@30845
  2181
wenzelm@30845
  2182
* Method "coherent" implements a prover for coherent logic (see also
wenzelm@30845
  2183
src/Tools/coherent.ML).
wenzelm@30845
  2184
wenzelm@30845
  2185
* Constants "undefined" and "default" replace "arbitrary".  Usually
wenzelm@30845
  2186
"undefined" is the right choice to replace "arbitrary", though
wenzelm@30845
  2187
logically there is no difference.  INCOMPATIBILITY.
wenzelm@30845
  2188
wenzelm@30845
  2189
* Command "value" now integrates different evaluation mechanisms.  The
wenzelm@30845
  2190
result of the first successful evaluation mechanism is printed.  In
wenzelm@30845
  2191
square brackets a particular named evaluation mechanisms may be
wenzelm@30845
  2192
specified (currently, [SML], [code] or [nbe]).  See further
wenzelm@30845
  2193
src/HOL/ex/Eval_Examples.thy.
wenzelm@30845
  2194
wenzelm@30845
  2195
* Normalization by evaluation now allows non-leftlinear equations.
wenzelm@30845
  2196
Declare with attribute [code nbe].
wenzelm@30845
  2197
wenzelm@30845
  2198
* Methods "case_tac" and "induct_tac" now refer to the very same rules
wenzelm@30845
  2199
as the structured Isar versions "cases" and "induct", cf. the
wenzelm@30845
  2200
corresponding "cases" and "induct" attributes.  Mutual induction rules
wenzelm@30845
  2201
are now presented as a list of individual projections
wenzelm@30845
  2202
(e.g. foo_bar.inducts for types foo and bar); the old format with
wenzelm@30845
  2203
explicit HOL conjunction is no longer supported.  INCOMPATIBILITY, in
wenzelm@30845
  2204
rare situations a different rule is selected --- notably nested tuple
wenzelm@30845
  2205
elimination instead of former prod.exhaust: use explicit (case_tac t
wenzelm@30845
  2206
rule: prod.exhaust) here.
wenzelm@30845
  2207
wenzelm@30845
  2208
* Attributes "cases", "induct", "coinduct" support "del" option.
wenzelm@30845
  2209
wenzelm@30845
  2210
* Removed fact "case_split_thm", which duplicates "case_split".
wenzelm@30845
  2211
wenzelm@30845
  2212
* The option datatype has been moved to a new theory Option.  Renamed
wenzelm@30845
  2213
option_map to Option.map, and o2s to Option.set, INCOMPATIBILITY.
wenzelm@30845
  2214
wenzelm@30845
  2215
* New predicate "strict_mono" classifies strict functions on partial
wenzelm@30845
  2216
orders.  With strict functions on linear orders, reasoning about
wenzelm@30845
  2217
(in)equalities is facilitated by theorems "strict_mono_eq",
wenzelm@30845
  2218
"strict_mono_less_eq" and "strict_mono_less".
wenzelm@30845
  2219
wenzelm@30845
  2220
* Some set operations are now proper qualified constants with
wenzelm@30845
  2221
authentic syntax.  INCOMPATIBILITY:
haftmann@30304
  2222
haftmann@30304
  2223
    op Int ~>   Set.Int
haftmann@30304
  2224
    op Un ~>    Set.Un
haftmann@30304
  2225
    INTER ~>    Set.INTER
haftmann@30304
  2226
    UNION ~>    Set.UNION
haftmann@30304
  2227
    Inter ~>    Set.Inter
haftmann@30304
  2228
    Union ~>    Set.Union
haftmann@30304
  2229
    {} ~>       Set.empty
haftmann@30304
  2230
    UNIV ~>     Set.UNIV
haftmann@30304
  2231
wenzelm@30845
  2232
* Class complete_lattice with operations Inf, Sup, INFI, SUPR now in
wenzelm@30845
  2233
theory Set.
wenzelm@30845
  2234
wenzelm@30845
  2235
* Auxiliary class "itself" has disappeared -- classes without any
wenzelm@30845
  2236
parameter are treated as expected by the 'class' command.
haftmann@29797
  2237
haftmann@29823
  2238
* Leibnitz's Series for Pi and the arcus tangens and logarithm series.
haftmann@29823
  2239
wenzelm@30845
  2240
* Common decision procedures (Cooper, MIR, Ferrack, Approximation,
wenzelm@30845
  2241
Dense_Linear_Order) are now in directory HOL/Decision_Procs.
wenzelm@30845
  2242
wenzelm@30845
  2243
* Theory src/HOL/Decision_Procs/Approximation provides the new proof
wenzelm@30845
  2244
method "approximation".  It proves formulas on real values by using
wenzelm@30845
  2245
interval arithmetic.  In the formulas are also the transcendental
wenzelm@30845
  2246
functions sin, cos, tan, atan, ln, exp and the constant pi are
wenzelm@30845
  2247
allowed. For examples see
wenzelm@30845
  2248
src/HOL/Descision_Procs/ex/Approximation_Ex.thy.
haftmann@29823
  2249
haftmann@29823
  2250
* Theory "Reflection" now resides in HOL/Library.
haftmann@29650
  2251
wenzelm@30845
  2252
* Entry point to Word library now simply named "Word".
wenzelm@30845
  2253
INCOMPATIBILITY.
haftmann@29628
  2254
haftmann@29197
  2255
* Made source layout more coherent with logical distribution
haftmann@29197
  2256
structure:
haftmann@28952
  2257
haftmann@28952
  2258
    src/HOL/Library/RType.thy ~> src/HOL/Typerep.thy
haftmann@28952
  2259
    src/HOL/Library/Code_Message.thy ~> src/HOL/
haftmann@28952
  2260
    src/HOL/Library/GCD.thy ~> src/HOL/
haftmann@28952
  2261
    src/HOL/Library/Order_Relation.thy ~> src/HOL/
haftmann@28952
  2262
    src/HOL/Library/Parity.thy ~> src/HOL/
haftmann@28952
  2263
    src/HOL/Library/Univ_Poly.thy ~> src/HOL/
huffman@30176
  2264
    src/HOL/Real/ContNotDenum.thy ~> src/HOL/Library/
haftmann@28952
  2265
    src/HOL/Real/Lubs.thy ~> src/HOL/
haftmann@28952
  2266
    src/HOL/Real/PReal.thy ~> src/HOL/
haftmann@28952
  2267
    src/HOL/Real/Rational.thy ~> src/HOL/
haftmann@28952
  2268
    src/HOL/Real/RComplete.thy ~> src/HOL/
haftmann@28952
  2269
    src/HOL/Real/RealDef.thy ~> src/HOL/
haftmann@28952
  2270
    src/HOL/Real/RealPow.thy ~> src/HOL/
haftmann@28952
  2271
    src/HOL/Real/Real.thy ~> src/HOL/
haftmann@28952
  2272
    src/HOL/Complex/Complex_Main.thy ~> src/HOL/
haftmann@28952
  2273
    src/HOL/Complex/Complex.thy ~> src/HOL/
huffman@30176
  2274
    src/HOL/Complex/FrechetDeriv.thy ~> src/HOL/Library/
huffman@30176
  2275
    src/HOL/Complex/Fundamental_Theorem_Algebra.thy ~> src/HOL/Library/
haftmann@28952
  2276
    src/HOL/Hyperreal/Deriv.thy ~> src/HOL/
haftmann@28952
  2277
    src/HOL/Hyperreal/Fact.thy ~> src/HOL/
haftmann@28952
  2278
    src/HOL/Hyperreal/Integration.thy ~> src/HOL/
haftmann@28952
  2279
    src/HOL/Hyperreal/Lim.thy ~> src/HOL/
haftmann@28952
  2280
    src/HOL/Hyperreal/Ln.thy ~> src/HOL/
haftmann@28952
  2281
    src/HOL/Hyperreal/Log.thy ~> src/HOL/
haftmann@28952
  2282
    src/HOL/Hyperreal/MacLaurin.thy ~> src/HOL/
haftmann@28952
  2283
    src/HOL/Hyperreal/NthRoot.thy ~> src/HOL/
haftmann@28952
  2284
    src/HOL/Hyperreal/Series.thy ~> src/HOL/
haftmann@29197
  2285
    src/HOL/Hyperreal/SEQ.thy ~> src/HOL/
haftmann@28952
  2286
    src/HOL/Hyperreal/Taylor.thy ~> src/HOL/
haftmann@28952
  2287
    src/HOL/Hyperreal/Transcendental.thy ~> src/HOL/
haftmann@28952
  2288
    src/HOL/Real/Float ~> src/HOL/Library/
haftmann@29197
  2289
    src/HOL/Real/HahnBanach ~> src/HOL/HahnBanach
haftmann@29197
  2290
    src/HOL/Real/RealVector.thy ~> src/HOL/
haftmann@28952
  2291
haftmann@28952
  2292
    src/HOL/arith_data.ML ~> src/HOL/Tools
haftmann@28952
  2293
    src/HOL/hologic.ML ~> src/HOL/Tools
haftmann@28952
  2294
    src/HOL/simpdata.ML ~> src/HOL/Tools
haftmann@28952
  2295
    src/HOL/int_arith1.ML ~> src/HOL/Tools/int_arith.ML
haftmann@28952
  2296
    src/HOL/int_factor_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  2297
    src/HOL/nat_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  2298
    src/HOL/Real/float_arith.ML ~> src/HOL/Tools
haftmann@28952
  2299
    src/HOL/Real/float_syntax.ML ~> src/HOL/Tools
haftmann@28952
  2300
    src/HOL/Real/rat_arith.ML ~> src/HOL/Tools
haftmann@28952
  2301
    src/HOL/Real/real_arith.ML ~> src/HOL/Tools
haftmann@28952
  2302
haftmann@29398
  2303
    src/HOL/Library/Array.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2304
    src/HOL/Library/Heap_Monad.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2305
    src/HOL/Library/Heap.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2306
    src/HOL/Library/Imperative_HOL.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2307
    src/HOL/Library/Ref.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2308
    src/HOL/Library/Relational.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2309
wenzelm@30845
  2310
* If methods "eval" and "evaluation" encounter a structured proof
wenzelm@30845
  2311
state with !!/==>, only the conclusion is evaluated to True (if
wenzelm@30845
  2312
possible), avoiding strange error messages.
wenzelm@30845
  2313
wenzelm@30845
  2314
* Method "sizechange" automates termination proofs using (a
wenzelm@30845
  2315
modification of) the size-change principle.  Requires SAT solver.  See
wenzelm@30845
  2316
src/HOL/ex/Termination.thy for examples.
wenzelm@30845
  2317
wenzelm@30845
  2318
* Simplifier: simproc for let expressions now unfolds if bound
wenzelm@30845
  2319
variable occurs at most once in let expression body.  INCOMPATIBILITY.
wenzelm@30845
  2320
wenzelm@30845
  2321
* Method "arith": Linear arithmetic now ignores all inequalities when
wenzelm@30845
  2322
fast_arith_neq_limit is exceeded, instead of giving up entirely.
wenzelm@30845
  2323
wenzelm@30845
  2324
* New attribute "arith" for facts that should always be used
wenzelm@30845
  2325
automatically by arithmetic. It is intended to be used locally in
wenzelm@30845
  2326
proofs, e.g.
wenzelm@30845
  2327
wenzelm@30845
  2328
  assumes [arith]: "x > 0"
wenzelm@30845
  2329
nipkow@30706
  2330
Global usage is discouraged because of possible performance impact.
nipkow@30706
  2331
wenzelm@30845
  2332
* New classes "top" and "bot" with corresponding operations "top" and
wenzelm@30845
  2333
"bot" in theory Orderings; instantiation of class "complete_lattice"
wenzelm@30845
  2334
requires instantiation of classes "top" and "bot".  INCOMPATIBILITY.
wenzelm@30845
  2335
wenzelm@30845
  2336
* Changed definition lemma "less_fun_def" in order to provide an
wenzelm@30845
  2337
instance for preorders on functions; use lemma "less_le" instead.
wenzelm@30845
  2338
INCOMPATIBILITY.
wenzelm@30845
  2339
wenzelm@30845
  2340
* Theory Orderings: class "wellorder" moved here, with explicit
wenzelm@30845
  2341
induction rule "less_induct" as assumption.  For instantiation of
wenzelm@30845
  2342
"wellorder" by means of predicate "wf", use rule wf_wellorderI.
wenzelm@30845
  2343
INCOMPATIBILITY.
wenzelm@30845
  2344
wenzelm@30845
  2345
* Theory Orderings: added class "preorder" as superclass of "order".
wenzelm@27793
  2346
INCOMPATIBILITY: Instantiation proofs for order, linorder
wenzelm@27793
  2347
etc. slightly changed.  Some theorems named order_class.* now named
wenzelm@27793
  2348
preorder_class.*.
wenzelm@27793
  2349
wenzelm@30845
  2350
* Theory Relation: renamed "refl" to "refl_on", "reflexive" to "refl,
wenzelm@30845
  2351
"diag" to "Id_on".
wenzelm@30845
  2352
wenzelm@30845
  2353
* Theory Finite_Set: added a new fold combinator of type
wenzelm@30845
  2354
nipkow@28855
  2355
  ('a => 'b => 'b) => 'b => 'a set => 'b
wenzelm@30845
  2356
wenzelm@30845
  2357
Occasionally this is more convenient than the old fold combinator
wenzelm@30845
  2358
which is now defined in terms of the new one and renamed to
wenzelm@30845
  2359
fold_image.
wenzelm@30845
  2360
wenzelm@30845
  2361
* Theories Ring_and_Field and OrderedGroup: The lemmas "group_simps"
wenzelm@30845
  2362
and "ring_simps" have been replaced by "algebra_simps" (which can be
wenzelm@30845
  2363
extended with further lemmas!).  At the moment both still exist but
wenzelm@30845
  2364
the former will disappear at some point.
wenzelm@30845
  2365
wenzelm@30845
  2366
* Theory Power: Lemma power_Suc is now declared as a simp rule in
wenzelm@30845
  2367
class recpower.  Type-specific simp rules for various recpower types
wenzelm@30845
  2368
have been removed.  INCOMPATIBILITY, rename old lemmas as follows:
huffman@30273
  2369
huffman@30273
  2370
rat_power_0    -> power_0
huffman@30273
  2371
rat_power_Suc  -> power_Suc
huffman@30273
  2372
realpow_0      -> power_0
huffman@30273
  2373
realpow_Suc    -> power_Suc
huffman@30273
  2374
complexpow_0   -> power_0
huffman@30273
  2375
complexpow_Suc -> power_Suc
huffman@30273
  2376
power_poly_0   -> power_0
huffman@30273
  2377
power_poly_Suc -> power_Suc
huffman@30273
  2378
wenzelm@30845
  2379
* Theories Ring_and_Field and Divides: Definition of "op dvd" has been
wenzelm@27793
  2380
moved to separate class dvd in Ring_and_Field; a couple of lemmas on
wenzelm@27793
  2381
dvd has been generalized to class comm_semiring_1.  Likewise a bunch
wenzelm@27793
  2382
of lemmas from Divides has been generalized from nat to class
wenzelm@27793
  2383
semiring_div.  INCOMPATIBILITY.  This involves the following theorem
wenzelm@27793
  2384
renames resulting from duplicate elimination:
haftmann@27651
  2385
haftmann@27651
  2386
    dvd_def_mod ~>          dvd_eq_mod_eq_0
haftmann@27651
  2387
    zero_dvd_iff ~>         dvd_0_left_iff
haftmann@28559
  2388
    dvd_0 ~>                dvd_0_right
haftmann@27651
  2389
    DIVISION_BY_ZERO_DIV ~> div_by_0
haftmann@27651
  2390
    DIVISION_BY_ZERO_MOD ~> mod_by_0
haftmann@27651
  2391
    mult_div ~>             div_mult_self2_is_id
haftmann@27651
  2392
    mult_mod ~>             mod_mult_self2_is_0
haftmann@27651
  2393
wenzelm@30845
  2394
* Theory IntDiv: removed many lemmas that are instances of class-based
wenzelm@30845
  2395
generalizations (from Divides and Ring_and_Field).  INCOMPATIBILITY,
wenzelm@30845
  2396
rename old lemmas as follows:
nipkow@30044
  2397
nipkow@30044
  2398
dvd_diff               -> nat_dvd_diff
nipkow@30044
  2399
dvd_zminus_iff         -> dvd_minus_iff
nipkow@30224
  2400
mod_add1_eq            -> mod_add_eq
nipkow@30224
  2401
mod_mult1_eq           -> mod_mult_right_eq
nipkow@30224
  2402
mod_mult1_eq'          -> mod_mult_left_eq
nipkow@30224
  2403
mod_mult_distrib_mod   -> mod_mult_eq
nipkow@30044
  2404
nat_mod_add_left_eq    -> mod_add_left_eq
nipkow@30044
  2405
nat_mod_add_right_eq   -> mod_add_right_eq
nipkow@30044
  2406
nat_mod_div_trivial    -> mod_div_trivial
nipkow@30044
  2407
nat_mod_mod_trivial    -> mod_mod_trivial
nipkow@30044
  2408
zdiv_zadd_self1        -> div_add_self1
nipkow@30044
  2409
zdiv_zadd_self2        -> div_add_self2
nipkow@30181
  2410
zdiv_zmult_self1       -> div_mult_self2_is_id
nipkow@30044
  2411
zdiv_zmult_self2       -> div_mult_self1_is_id
nipkow@30044
  2412
zdvd_triv_left         -> dvd_triv_left
nipkow@30044
  2413
zdvd_triv_right        -> dvd_triv_right
nipkow@30044
  2414
zdvd_zmult_cancel_disj -> dvd_mult_cancel_left
nipkow@30085
  2415
zmod_eq0_zdvd_iff      -> dvd_eq_mod_eq_0[symmetric]
nipkow@30044
  2416
zmod_zadd_left_eq      -> mod_add_left_eq
nipkow@30044
  2417
zmod_zadd_right_eq     -> mod_add_right_eq
nipkow@30044
  2418
zmod_zadd_self1        -> mod_add_self1
nipkow@30044
  2419
zmod_zadd_self2        -> mod_add_self2
nipkow@30224
  2420
zmod_zadd1_eq          -> mod_add_eq
nipkow@30044
  2421
zmod_zdiff1_eq         -> mod_diff_eq
nipkow@30044
  2422
zmod_zdvd_zmod         -> mod_mod_cancel
nipkow@30044
  2423
zmod_zmod_cancel       -> mod_mod_cancel
nipkow@30044
  2424
zmod_zmult_self1       -> mod_mult_self2_is_0
nipkow@30044
  2425
zmod_zmult_self2       -> mod_mult_self1_is_0
nipkow@30044
  2426
zmod_1                 -> mod_by_1
nipkow@30044
  2427
zdiv_1                 -> div_by_1
nipkow@30044
  2428
zdvd_abs1              -> abs_dvd_iff
nipkow@30044
  2429
zdvd_abs2              -> dvd_abs_iff
nipkow@30044
  2430
zdvd_refl              -> dvd_refl
nipkow@30044
  2431
zdvd_trans             -> dvd_trans
nipkow@30044
  2432
zdvd_zadd              -> dvd_add
nipkow@30044
  2433
zdvd_zdiff             -> dvd_diff
nipkow@30044
  2434
zdvd_zminus_iff        -> dvd_minus_iff
nipkow@30044
  2435
zdvd_zminus2_iff       -> minus_dvd_iff
nipkow@30044
  2436
zdvd_zmultD            -> dvd_mult_right
nipkow@30044
  2437
zdvd_zmultD2           -> dvd_mult_left
nipkow@30044
  2438
zdvd_zmult_mono        -> mult_dvd_mono
nipkow@30044
  2439
zdvd_0_right           -> dvd_0_right
nipkow@30044
  2440
zdvd_0_left            -> dvd_0_left_iff
nipkow@30044
  2441
zdvd_1_left            -> one_dvd
nipkow@30044
  2442
zminus_dvd_iff         -> minus_dvd_iff
nipkow@30044
  2443
wenzelm@30845
  2444
* Theory Rational: 'Fract k 0' now equals '0'.  INCOMPATIBILITY.
wenzelm@30845
  2445
wenzelm@30845
  2446
* The real numbers offer decimal input syntax: 12.34 is translated
wenzelm@30845
  2447
into 1234/10^2. This translation is not reversed upon output.
wenzelm@30845
  2448
wenzelm@30845
  2449
* Theory Library/Polynomial defines an abstract type 'a poly of
wenzelm@30845
  2450
univariate polynomials with coefficients of type 'a.  In addition to
wenzelm@30845
  2451
the standard ring operations, it also supports div and mod.  Code
wenzelm@30845
  2452
generation is also supported, using list-style constructors.
wenzelm@30845
  2453
wenzelm@30845
  2454
* Theory Library/Inner_Product defines a class of real_inner for real
wenzelm@30845
  2455
inner product spaces, with an overloaded operation inner :: 'a => 'a
wenzelm@30845
  2456
=> real.  Class real_inner is a subclass of real_normed_vector from
wenzelm@30845
  2457
theory RealVector.
wenzelm@30845
  2458
wenzelm@30845
  2459
* Theory Library/Product_Vector provides instances for the product
wenzelm@30845
  2460
type 'a * 'b of several classes from RealVector and Inner_Product.
wenzelm@30845
  2461
Definitions of addition, subtraction, scalar multiplication, norms,
wenzelm@30845
  2462
and inner products are included.
wenzelm@30845
  2463
wenzelm@30845
  2464
* Theory Library/Bit defines the field "bit" of integers modulo 2.  In
wenzelm@30845
  2465
addition to the field operations, numerals and case syntax are also
wenzelm@30845
  2466
supported.
wenzelm@30845
  2467
wenzelm@30845
  2468
* Theory Library/Diagonalize provides constructive version of Cantor's
wenzelm@30845
  2469
first diagonalization argument.
wenzelm@30845
  2470
wenzelm@30845
  2471
* Theory Library/GCD: Curried operations gcd, lcm (for nat) and zgcd,
wenzelm@27599
  2472
zlcm (for int); carried together from various gcd/lcm developements in
wenzelm@30845
  2473
the HOL Distribution.  Constants zgcd and zlcm replace former igcd and
wenzelm@30845
  2474
ilcm; corresponding theorems renamed accordingly.  INCOMPATIBILITY,
wenzelm@30845
  2475
may recover tupled syntax as follows:
haftmann@27556
  2476
haftmann@27556
  2477
    hide (open) const gcd
haftmann@27556
  2478
    abbreviation gcd where
haftmann@27556
  2479
      "gcd == (%(a, b). GCD.gcd a b)"
haftmann@27556
  2480
    notation (output)
haftmann@27556
  2481
      GCD.gcd ("gcd '(_, _')")
haftmann@27556
  2482
wenzelm@30845
  2483
The same works for lcm, zgcd, zlcm.
wenzelm@30845
  2484
wenzelm@30845
  2485
* Theory Library/Nat_Infinity: added addition, numeral syntax and more
wenzelm@30845
  2486
instantiations for algebraic structures.  Removed some duplicate
wenzelm@30845
  2487
theorems.  Changes in simp rules.  INCOMPATIBILITY.
wenzelm@30845
  2488
wenzelm@30845
  2489
* ML antiquotation @{code} takes a constant as argument and generates
haftmann@27651
  2490
corresponding code in background and inserts name of the corresponding
haftmann@27651
  2491
resulting ML value/function/datatype constructor binding in place.
haftmann@27651
  2492
All occurrences of @{code} with a single ML block are generated
haftmann@27651
  2493
simultaneously.  Provides a generic and safe interface for
wenzelm@30845
  2494
instrumentalizing code generation.  See
wenzelm@30845
  2495
src/HOL/Decision_Procs/Ferrack.thy for a more ambitious application.
wenzelm@30845
  2496
In future you ought to refrain from ad-hoc compiling generated SML
wenzelm@30845
  2497
code on the ML toplevel.  Note that (for technical reasons) @{code}
wenzelm@30845
  2498
cannot refer to constants for which user-defined serializations are
wenzelm@30845
  2499
set.  Refer to the corresponding ML counterpart directly in that
wenzelm@30845
  2500
cases.
wenzelm@27122
  2501
wenzelm@27122
  2502
* Command 'rep_datatype': instead of theorem names the command now
wenzelm@27122
  2503
takes a list of terms denoting the constructors of the type to be
wenzelm@27122
  2504
represented as datatype.  The characteristic theorems have to be
wenzelm@27122
  2505
proven.  INCOMPATIBILITY.  Also observe that the following theorems
wenzelm@27122
  2506
have disappeared in favour of existing ones:
wenzelm@27122
  2507
haftmann@27104
  2508
    unit_induct                 ~> unit.induct
haftmann@27104
  2509
    prod_induct                 ~> prod.induct
haftmann@27104
  2510
    sum_induct                  ~> sum.induct
haftmann@27104
  2511
    Suc_Suc_eq                  ~> nat.inject
haftmann@27104
  2512
    Suc_not_Zero Zero_not_Suc   ~> nat.distinct
haftmann@27104
  2513
haftmann@27104
  2514
ballarin@27696
  2515
*** HOL-Algebra ***
ballarin@27696
  2516
ballarin@27713
  2517
* New locales for orders and lattices where the equivalence relation
wenzelm@30106
  2518
is not restricted to equality.  INCOMPATIBILITY: all order and lattice
wenzelm@30106
  2519
locales use a record structure with field eq for the equivalence.
ballarin@27713
  2520
ballarin@27713
  2521
* New theory of factorial domains.
ballarin@27713
  2522
wenzelm@30845
  2523
* Units_l_inv and Units_r_inv are now simp rules by default.
ballarin@27696
  2524
INCOMPATIBILITY.  Simplifier proof that require deletion of l_inv
ballarin@27696
  2525
and/or r_inv will now also require deletion of these lemmas.
ballarin@27696
  2526
wenzelm@30845
  2527
* Renamed the following theorems, INCOMPATIBILITY:
wenzelm@30845
  2528
ballarin@27696
  2529
UpperD ~> Upper_memD
ballarin@27696
  2530
LowerD ~> Lower_memD
ballarin@27696
  2531
least_carrier ~> least_closed
ballarin@27696
  2532
greatest_carrier ~> greatest_closed
ballarin@27696
  2533
greatest_Lower_above ~> greatest_Lower_below
ballarin@27717
  2534
one_zero ~> carrier_one_zero
ballarin@27717
  2535
one_not_zero ~> carrier_one_not_zero  (collision with assumption)
ballarin@27696
  2536
wenzelm@27793
  2537
wenzelm@30849
  2538
*** HOL-Nominal ***
wenzelm@30849
  2539
wenzelm@30855
  2540
* Nominal datatypes can now contain type-variables.
wenzelm@30855
  2541
wenzelm@30855
  2542
* Commands 'nominal_inductive' and 'equivariance' work with local
wenzelm@30855
  2543
theory targets.
wenzelm@30855
  2544
wenzelm@30855
  2545
* Nominal primrec can now works with local theory targets and its
wenzelm@30855
  2546
specification syntax now conforms to the general format as seen in
wenzelm@30855
  2547
'inductive' etc.
wenzelm@30855
  2548
wenzelm@30855
  2549
* Method "perm_simp" honours the standard simplifier attributes
wenzelm@30855
  2550
(no_asm), (no_asm_use) etc.
wenzelm@30855
  2551
wenzelm@30855
  2552
* The new predicate #* is defined like freshness, except that on the
wenzelm@30855
  2553
left hand side can be a set or list of atoms.
wenzelm@30855
  2554
wenzelm@30855
  2555
* Experimental command 'nominal_inductive2' derives strong induction
wenzelm@30855
  2556
principles for inductive definitions.  In contrast to
wenzelm@30855
  2557
'nominal_inductive', which can only deal with a fixed number of
wenzelm@30855
  2558
binders, it can deal with arbitrary expressions standing for sets of
wenzelm@30855
  2559
atoms to be avoided.  The only inductive definition we have at the
wenzelm@30855
  2560
moment that needs this generalisation is the typing rule for Lets in
wenzelm@30855
  2561
the algorithm W:
wenzelm@30855
  2562
wenzelm@30855
  2563
 Gamma |- t1 : T1   (x,close Gamma T1)::Gamma |- t2 : T2   x#Gamma
wenzelm@30855
  2564
 -----------------------------------------------------------------
wenzelm@30855
  2565
         Gamma |- Let x be t1 in t2 : T2
wenzelm@30855
  2566
wenzelm@30855
  2567
In this rule one wants to avoid all the binders that are introduced by
wenzelm@30855
  2568
"close Gamma T1".  We are looking for other examples where this
wenzelm@30855
  2569
feature might be useful.  Please let us know.
wenzelm@30849
  2570
wenzelm@30849
  2571
huffman@30176
  2572
*** HOLCF ***
huffman@30176
  2573
huffman@30176
  2574
* Reimplemented the simplification procedure for proving continuity
huffman@30176
  2575
subgoals.  The new simproc is extensible; users can declare additional
huffman@30176
  2576
continuity introduction rules with the attribute [cont2cont].
huffman@30176
  2577
huffman@30176
  2578
* The continuity simproc now uses a different introduction rule for
huffman@30176
  2579
solving continuity subgoals on terms with lambda abstractions.  In
huffman@30176
  2580
some rare cases the new simproc may fail to solve subgoals that the
huffman@30176
  2581
old one could solve, and "simp add: cont2cont_LAM" may be necessary.
huffman@30176
  2582
Potential INCOMPATIBILITY.
huffman@30176
  2583
wenzelm@30847
  2584
* Command 'fixrec': specification syntax now conforms to the general
wenzelm@30855
  2585
format as seen in 'inductive' etc.  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@30855
  2586
examples.  INCOMPATIBILITY.
wenzelm@30845
  2587
wenzelm@30845
  2588
wenzelm@30845
  2589
*** ZF ***
wenzelm@30845
  2590
wenzelm@30845
  2591
* Proof of Zorn's Lemma for partial orders.
huffman@30176
  2592
huffman@30176
  2593
wenzelm@27246
  2594
*** ML ***
wenzelm@28088
  2595
wenzelm@30845
  2596
* Multithreading for Poly/ML 5.1/5.2 is no longer supported, only for
wenzelm@30845
  2597
Poly/ML 5.2.1 or later.  Important note: the TimeLimit facility
wenzelm@30845
  2598
depends on multithreading, so timouts will not work before Poly/ML
wenzelm@30845
  2599
5.2.1!
wenzelm@30845
  2600
wenzelm@29161
  2601
* High-level support for concurrent ML programming, see
wenzelm@29161
  2602
src/Pure/Cuncurrent.  The data-oriented model of "future values" is
wenzelm@29161
  2603
particularly convenient to organize independent functional
wenzelm@29161
  2604
computations.  The concept of "synchronized variables" provides a
wenzelm@29161
  2605
higher-order interface for components with shared state, avoiding the
wenzelm@30845
  2606
delicate details of mutexes and condition variables.  (Requires
wenzelm@30845
  2607
Poly/ML 5.2.1 or later.)
wenzelm@30845
  2608
wenzelm@30845
  2609
* ML bindings produced via Isar commands are stored within the Isar
wenzelm@30845
  2610
context (theory or proof).  Consequently, commands like 'use' and 'ML'
wenzelm@30845
  2611
become thread-safe and work with undo as expected (concerning
wenzelm@30845
  2612
top-level bindings, not side-effects on global references).
wenzelm@30845
  2613
INCOMPATIBILITY, need to provide proper Isar context when invoking the
wenzelm@30845
  2614
compiler at runtime; really global bindings need to be given outside a
wenzelm@30845
  2615
theory.  (Requires Poly/ML 5.2 or later.)
wenzelm@30845
  2616
wenzelm@30845
  2617
* Command 'ML_prf' is analogous to 'ML' but works within a proof
wenzelm@30845
  2618
context.  Top-level ML bindings are stored within the proof context in
wenzelm@30845
  2619
a purely sequential fashion, disregarding the nested proof structure.
wenzelm@30845
  2620
ML bindings introduced by 'ML_prf' are discarded at the end of the
wenzelm@30845
  2621
proof.  (Requires Poly/ML 5.2 or later.)
wenzelm@29161
  2622
wenzelm@30530
  2623
* Simplified ML attribute and method setup, cf. functions Attrib.setup
wenzelm@30845
  2624
and Method.setup, as well as Isar commands 'attribute_setup' and
wenzelm@30547
  2625
'method_setup'.  INCOMPATIBILITY for 'method_setup', need to simplify
wenzelm@30547
  2626
existing code accordingly, or use plain 'setup' together with old
wenzelm@30547
  2627
Method.add_method.
wenzelm@30530
  2628
wenzelm@28294
  2629
* Simplified ML oracle interface Thm.add_oracle promotes 'a -> cterm
wenzelm@28294
  2630
to 'a -> thm, while results are always tagged with an authentic oracle
wenzelm@28294
  2631
name.  The Isar command 'oracle' is now polymorphic, no argument type
wenzelm@28294
  2632
is specified.  INCOMPATIBILITY, need to simplify existing oracle code
wenzelm@28294
  2633
accordingly.  Note that extra performance may be gained by producing
wenzelm@28294
  2634
the cterm carefully, avoiding slow Thm.cterm_of.
wenzelm@28294
  2635
wenzelm@30845
  2636
* Simplified interface for defining document antiquotations via
wenzelm@30845
  2637
ThyOutput.antiquotation, ThyOutput.output, and optionally
wenzelm@30845
  2638
ThyOutput.maybe_pretty_source.  INCOMPATIBILITY, need to simplify user
wenzelm@30845
  2639
antiquotations accordingly, see src/Pure/Thy/thy_output.ML for common
wenzelm@30845
  2640
examples.
wenzelm@28099
  2641
wenzelm@30395
  2642
* More systematic treatment of long names, abstract name bindings, and
wenzelm@30395
  2643
name space operations.  Basic operations on qualified names have been
wenzelm@30399
  2644
move from structure NameSpace to Long_Name, e.g. Long_Name.base_name,
wenzelm@30395
  2645
Long_Name.append.  Old type bstring has been mostly replaced by
wenzelm@30395
  2646
abstract type binding (see structure Binding), which supports precise
wenzelm@30845
  2647
qualification by packages and local theory targets, as well as proper
wenzelm@30845
  2648
tracking of source positions.  INCOMPATIBILITY, need to wrap old
wenzelm@30845
  2649
bstring values into Binding.name, or better pass through abstract
wenzelm@30399
  2650
bindings everywhere.  See further src/Pure/General/long_name.ML,
wenzelm@30395
  2651
src/Pure/General/binding.ML and src/Pure/General/name_space.ML
wenzelm@30395
  2652
wenzelm@28089
  2653
* Result facts (from PureThy.note_thms, ProofContext.note_thms,
wenzelm@28089
  2654
LocalTheory.note etc.) now refer to the *full* internal name, not the
wenzelm@28089
  2655
bstring as before.  INCOMPATIBILITY, not detected by ML type-checking!
wenzelm@28089
  2656
wenzelm@27287
  2657
* Disposed old type and term read functions (Sign.read_def_typ,
wenzelm@27287
  2658
Sign.read_typ, Sign.read_def_terms, Sign.read_term,
wenzelm@27287
  2659
Thm.read_def_cterms, Thm.read_cterm etc.).  INCOMPATIBILITY, should
wenzelm@27287
  2660
use regular Syntax.read_typ, Syntax.read_term, Syntax.read_typ_global,
wenzelm@27269
  2661
Syntax.read_term_global etc.; see also OldGoals.read_term as last
wenzelm@27269
  2662
resort for legacy applications.