NEWS
author wenzelm
Wed Sep 07 11:26:27 2011 +0200 (2011-09-07)
changeset 44777 1afb48f872ae
parent 44760 19e1c6e922b6
child 44800 0472f2367efb
child 44822 2690b6de5021
permissions -rw-r--r--
more NEWS;
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Isabelle NEWS -- history user-relevant changes
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==============================================
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New in this Isabelle version
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----------------------------
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*** General ***
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* Improved Isabelle/jEdit Prover IDE (PIDE), which can be invoked as
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"isabelle jedit" on the command line.
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  - Management of multiple theory files directly from the editor
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    buffer store -- bypassing the file-system (no requirement to save
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    files for checking).
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  - Markup of formal entities within the text buffer, with semantic
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    highlighting, tooltips and hyperlinks to jump to defining source
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    positions.
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  - Improved text rendering, with sub/superscripts in the source
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    buffer (including support for copy/paste wrt. output panel, HTML
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    theory output and other non-Isabelle text boxes).
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  - Refined scheduling of proof checking and printing of results,
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    based on interactive editor view.  (Note: jEdit folding and
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    narrowing allows to restrict buffer perspectives explicitly.)
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  - Reduced CPU performance requirements, usable on machines with few
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    cores.
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  - Reduced memory requirements due to pruning of unused document
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    versions (garbage collection).
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See also ~~/src/Tools/jEdit/README.html for further information,
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including some remaining limitations.
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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) has been discontinued.
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Note that the path element ~~ may be used to reference theories in the
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Isabelle home folder -- for instance, "~~/src/HOL/Library/FuncSet".
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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: former unsynchronized references are now proper
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configuration options, with more conventional names:
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  long_names   ~> names_long
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  short_names  ~> names_short
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  unique_names ~> names_unique
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Minor INCOMPATIBILITY, need to declare options in context like this:
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  declare [[names_unique = 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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* Isabelle/Isar reference manual provides more formal references in
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syntax diagrams.
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* Attribute case_names has been refined: the assumptions in each case can
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be named now by following the case name with [name1 name2 ...].
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*** HOL ***
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* Classes bot and top require underlying partial order rather than preorder:
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uniqueness of bot and top is guaranteed.  INCOMPATIBILITY.
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* Class complete_lattice: generalized a couple of lemmas from sets;
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generalized theorems INF_cong and SUP_cong.  New type classes for complete
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boolean algebras and complete linear orders.  Lemmas Inf_less_iff,
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less_Sup_iff, INF_less_iff, less_SUP_iff now reside in class complete_linorder.
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Changed proposition of lemmas Inf_bool_def, Sup_bool_def, Inf_fun_def, Sup_fun_def,
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Inf_apply, Sup_apply.
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Redundant lemmas Inf_singleton, Sup_singleton, Inf_binary, Sup_binary,
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INF_eq, SUP_eq, INF_UNIV_range, SUP_UNIV_range, Int_eq_Inter,
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INTER_eq_Inter_image, Inter_def, INT_eq, Un_eq_Union, UNION_eq_Union_image,
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Union_def, UN_singleton, UN_eq have been discarded.
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More consistent and less misunderstandable names:
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  INFI_def ~> INF_def
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  SUPR_def ~> SUP_def
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  INF_leI ~> INF_lower
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  INF_leI2 ~> INF_lower2
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  le_INFI ~> INF_greatest
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  le_SUPI ~> SUP_upper
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  le_SUPI2 ~> SUP_upper2
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  SUP_leI ~> SUP_least
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  INFI_bool_eq ~> INF_bool_eq
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  SUPR_bool_eq ~> SUP_bool_eq
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  INFI_apply ~> INF_apply
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  SUPR_apply ~> SUP_apply
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  INTER_def ~> INTER_eq
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  UNION_def ~> UNION_eq
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INCOMPATIBILITY.
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* Theorem collections ball_simps and bex_simps do not contain theorems referring
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to UNION any longer;  these have been moved to collection UN_ball_bex_simps.
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INCOMPATIBILITY.
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* Archimedean_Field.thy:
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    floor now is defined as parameter of a separate type class floor_ceiling.
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* Finite_Set.thy: more coherent development of fold_set locales:
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    locale fun_left_comm ~> locale comp_fun_commute
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    locale fun_left_comm_idem ~> locale comp_fun_idem
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Both use point-free characterisation; interpretation proofs may need adjustment.
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INCOMPATIBILITY.
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* Code generation:
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  - theory Library/Code_Char_ord provides native ordering of characters
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    in the target language.
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  - commands code_module and code_library are legacy, use export_code instead. 
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  - method evaluation is legacy, use method eval instead.
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  - legacy evaluator "SML" is deactivated by default. To activate it, add the following
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    line in your theory:
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      setup {* Value.add_evaluator ("SML", Codegen.eval_term) *}
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* Declare ext [intro] by default.  Rare INCOMPATIBILITY.
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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 "preplay_timeout", "slicing", "type_enc", "sound", "max_mono_iters",
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    and "max_new_mono_instances" options.
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  - Removed "explicit_apply" and "full_types" options as well as "Full Types"
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    Proof General menu item. INCOMPATIBILITY.
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* Metis:
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  - Removed "metisF" -- use "metis" instead. INCOMPATIBILITY.
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  - Obsoleted "metisFT" -- use "metis (full_types)" instead. INCOMPATIBILITY.
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* "try":
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  - Renamed "try_methods" and added "simp:", "intro:", "dest:", and "elim:"
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    options. INCOMPATIBILITY.
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  - Introduced "try" that not only runs "try_methods" but also "solve_direct",
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    "sledgehammer", "quickcheck", and "nitpick".
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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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  - New counterexample generator quickcheck[narrowing] enables
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    narrowing-based testing.
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    It requires that the Glasgow Haskell compiler is installed and
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    its location is known to Isabelle with the environment variable
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    ISABELLE_GHC.
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  - Removed quickcheck tester "SML" based on the SML code generator
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    from HOL-Library
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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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* Old recdef package has been moved to Library/Old_Recdef.thy, where it
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must be loaded explicitly.  INCOMPATIBILITY.
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* Well-founded recursion combinator "wfrec" has been moved to
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Library/Wfrec.thy. INCOMPATIBILITY.
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* Theory Library/Nat_Infinity has been renamed to Library/Extended_Nat.
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The names of the following types and constants have changed:
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  inat (type) ~> enat
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  Fin         ~> enat
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  Infty       ~> infinity (overloaded)
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  iSuc        ~> eSuc
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  the_Fin     ~> the_enat
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Every theorem name containing "inat", "Fin", "Infty", or "iSuc" has
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been renamed accordingly.
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* Limits.thy: Type "'a net" has been renamed to "'a filter", in
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accordance with standard mathematical terminology. INCOMPATIBILITY.
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* Session Multivariate_Analysis: Type "('a, 'b) cart" has been renamed
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to "('a, 'b) vec" (the syntax "'a ^ 'b" remains unaffected). Constants
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"Cart_nth" and "Cart_lambda" have been respectively renamed to
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"vec_nth" and "vec_lambda"; theorems mentioning those names have
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changed to match. Definition theorems for overloaded constants now use
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the standard "foo_vec_def" naming scheme. A few other theorems have
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been renamed as follows (INCOMPATIBILITY):
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  Cart_eq          ~> vec_eq_iff
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  dist_nth_le_cart ~> dist_vec_nth_le
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  tendsto_vector   ~> vec_tendstoI
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  Cauchy_vector    ~> vec_CauchyI
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* Session Multivariate_Analysis: Several duplicate theorems have been
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removed, and other theorems have been renamed or replaced with more
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general versions. INCOMPATIBILITY.
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  finite_choice ~> finite_set_choice
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  eventually_conjI ~> eventually_conj
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  eventually_and ~> eventually_conj_iff
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  eventually_false ~> eventually_False
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  setsum_norm ~> norm_setsum
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  Lim_ident_at ~> LIM_ident
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  Lim_const ~> tendsto_const
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  Lim_cmul ~> tendsto_scaleR [OF tendsto_const]
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  Lim_neg ~> tendsto_minus
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  Lim_add ~> tendsto_add
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  Lim_sub ~> tendsto_diff
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  Lim_mul ~> tendsto_scaleR
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  Lim_vmul ~> tendsto_scaleR [OF _ tendsto_const]
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  Lim_null_norm ~> tendsto_norm_zero_iff [symmetric]
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  Lim_linear ~> bounded_linear.tendsto
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  Lim_component ~> tendsto_euclidean_component
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  Lim_component_cart ~> tendsto_vec_nth
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  Lim_inner ~> tendsto_inner [OF tendsto_const]
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  dot_lsum ~> inner_setsum_left
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  dot_rsum ~> inner_setsum_right
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  continuous_cmul ~> continuous_scaleR [OF continuous_const]
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  continuous_neg ~> continuous_minus
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  continuous_sub ~> continuous_diff
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  continuous_vmul ~> continuous_scaleR [OF _ continuous_const]
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  continuous_mul ~> continuous_scaleR
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  continuous_inv ~> continuous_inverse
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  continuous_at_within_inv ~> continuous_at_within_inverse
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  continuous_at_inv ~> continuous_at_inverse
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  continuous_at_norm ~> continuous_norm [OF continuous_at_id]
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  continuous_at_infnorm ~> continuous_infnorm [OF continuous_at_id]
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  continuous_at_component ~> continuous_component [OF continuous_at_id]
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  continuous_on_neg ~> continuous_on_minus
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  continuous_on_sub ~> continuous_on_diff
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  continuous_on_cmul ~> continuous_on_scaleR [OF continuous_on_const]
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  continuous_on_vmul ~> continuous_on_scaleR [OF _ continuous_on_const]
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  continuous_on_mul ~> continuous_on_scaleR
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  continuous_on_mul_real ~> continuous_on_mult
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  continuous_on_inner ~> continuous_on_inner [OF continuous_on_const]
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  continuous_on_norm ~> continuous_on_norm [OF continuous_on_id]
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  continuous_on_inverse ~> continuous_on_inv
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  uniformly_continuous_on_neg ~> uniformly_continuous_on_minus
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  uniformly_continuous_on_sub ~> uniformly_continuous_on_diff
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  subset_interior ~> interior_mono
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  subset_closure ~> closure_mono
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  closure_univ ~> closure_UNIV
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  real_arch_lt ~> reals_Archimedean2
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  real_arch ~> reals_Archimedean3
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  real_abs_norm ~> abs_norm_cancel
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  real_abs_sub_norm ~> norm_triangle_ineq3
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  norm_cauchy_schwarz_abs ~> Cauchy_Schwarz_ineq2
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* Complex_Main: The locale interpretations for the bounded_linear and
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bounded_bilinear locales have been removed, in order to reduce the
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number of duplicate lemmas. Users must use the original names for
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distributivity theorems, potential INCOMPATIBILITY.
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  divide.add ~> add_divide_distrib
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  divide.diff ~> diff_divide_distrib
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  divide.setsum ~> setsum_divide_distrib
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  mult.add_right ~> right_distrib
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  mult.diff_right ~> right_diff_distrib
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  mult_right.setsum ~> setsum_right_distrib
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  mult_left.diff ~> left_diff_distrib
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* Complex_Main: Several redundant theorems have been removed or
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replaced by more general versions. INCOMPATIBILITY.
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  real_0_le_divide_iff ~> zero_le_divide_iff
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  realpow_two_disj ~> power2_eq_iff
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  real_squared_diff_one_factored ~> square_diff_one_factored
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  realpow_two_diff ~> square_diff_square_factored
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  reals_complete2 ~> complete_real
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  real_sum_squared_expand ~> power2_sum
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  exp_ln_eq ~> ln_unique
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  expi_add ~> exp_add
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  expi_zero ~> exp_zero
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  lemma_DERIV_subst ~> DERIV_cong
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  LIMSEQ_Zfun_iff ~> tendsto_Zfun_iff
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  LIMSEQ_const ~> tendsto_const
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  LIMSEQ_norm ~> tendsto_norm
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  LIMSEQ_add ~> tendsto_add
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  LIMSEQ_minus ~> tendsto_minus
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  LIMSEQ_minus_cancel ~> tendsto_minus_cancel
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  LIMSEQ_diff ~> tendsto_diff
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  bounded_linear.LIMSEQ ~> bounded_linear.tendsto
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  bounded_bilinear.LIMSEQ ~> bounded_bilinear.tendsto
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  LIMSEQ_mult ~> tendsto_mult
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  LIMSEQ_inverse ~> tendsto_inverse
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  LIMSEQ_divide ~> tendsto_divide
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  LIMSEQ_pow ~> tendsto_power
huffman@44568
   325
  LIMSEQ_setsum ~> tendsto_setsum
huffman@44568
   326
  LIMSEQ_setprod ~> tendsto_setprod
huffman@44568
   327
  LIMSEQ_norm_zero ~> tendsto_norm_zero_iff
huffman@44568
   328
  LIMSEQ_rabs_zero ~> tendsto_rabs_zero_iff
huffman@44568
   329
  LIMSEQ_imp_rabs ~> tendsto_rabs
huffman@44710
   330
  LIMSEQ_add_minus ~> tendsto_add [OF _ tendsto_minus]
huffman@44710
   331
  LIMSEQ_add_const ~> tendsto_add [OF _ tendsto_const]
huffman@44710
   332
  LIMSEQ_diff_const ~> tendsto_diff [OF _ tendsto_const]
huffman@44748
   333
  LIMSEQ_Complex ~> tendsto_Complex
huffman@44568
   334
  LIM_ident ~> tendsto_ident_at
huffman@44568
   335
  LIM_const ~> tendsto_const
huffman@44568
   336
  LIM_add ~> tendsto_add
huffman@44568
   337
  LIM_add_zero ~> tendsto_add_zero
huffman@44568
   338
  LIM_minus ~> tendsto_minus
huffman@44568
   339
  LIM_diff ~> tendsto_diff
huffman@44568
   340
  LIM_norm ~> tendsto_norm
huffman@44568
   341
  LIM_norm_zero ~> tendsto_norm_zero
huffman@44568
   342
  LIM_norm_zero_cancel ~> tendsto_norm_zero_cancel
huffman@44568
   343
  LIM_norm_zero_iff ~> tendsto_norm_zero_iff
huffman@44568
   344
  LIM_rabs ~> tendsto_rabs
huffman@44568
   345
  LIM_rabs_zero ~> tendsto_rabs_zero
huffman@44568
   346
  LIM_rabs_zero_cancel ~> tendsto_rabs_zero_cancel
huffman@44568
   347
  LIM_rabs_zero_iff ~> tendsto_rabs_zero_iff
huffman@44568
   348
  LIM_compose ~> tendsto_compose
huffman@44568
   349
  LIM_mult ~> tendsto_mult
huffman@44568
   350
  LIM_scaleR ~> tendsto_scaleR
huffman@44568
   351
  LIM_of_real ~> tendsto_of_real
huffman@44568
   352
  LIM_power ~> tendsto_power
huffman@44568
   353
  LIM_inverse ~> tendsto_inverse
huffman@44568
   354
  LIM_sgn ~> tendsto_sgn
huffman@44568
   355
  isCont_LIM_compose ~> isCont_tendsto_compose
huffman@44568
   356
  bounded_linear.LIM ~> bounded_linear.tendsto
huffman@44568
   357
  bounded_linear.LIM_zero ~> bounded_linear.tendsto_zero
huffman@44568
   358
  bounded_bilinear.LIM ~> bounded_bilinear.tendsto
huffman@44568
   359
  bounded_bilinear.LIM_prod_zero ~> bounded_bilinear.tendsto_zero
huffman@44568
   360
  bounded_bilinear.LIM_left_zero ~> bounded_bilinear.tendsto_left_zero
huffman@44568
   361
  bounded_bilinear.LIM_right_zero ~> bounded_bilinear.tendsto_right_zero
huffman@44568
   362
  LIM_inverse_fun ~> tendsto_inverse [OF tendsto_ident_at]
huffman@44522
   363
wenzelm@42484
   364
krauss@41685
   365
*** Document preparation ***
krauss@41685
   366
wenzelm@43709
   367
* Discontinued special treatment of hard tabulators, which are better
wenzelm@43709
   368
avoided in the first place.  Implicit tab-width is 1.
wenzelm@43709
   369
wenzelm@42706
   370
* Antiquotation @{rail} layouts railroad syntax diagrams, see also
wenzelm@42706
   371
isar-ref manual.
wenzelm@42633
   372
bulwahn@43613
   373
* Antiquotation @{value} evaluates the given term and presents its result.
bulwahn@43613
   374
wenzelm@42514
   375
* Localized \isabellestyle switch can be used within blocks or groups
wenzelm@42514
   376
like this:
wenzelm@42514
   377
wenzelm@42514
   378
  \isabellestyle{it}  %preferred default
wenzelm@42514
   379
  {\isabellestylett @{text "typewriter stuff"}}
wenzelm@42514
   380
krauss@41685
   381
* New term style "isub" as ad-hoc conversion of variables x1, y23 into
krauss@41685
   382
subscripted form x\<^isub>1, y\<^isub>2\<^isub>3.
wenzelm@41651
   383
wenzelm@42484
   384
* Predefined LaTeX macros for Isabelle symbols \<bind> and \<then>
wenzelm@42484
   385
(e.g. see ~~/src/HOL/Library/Monad_Syntax.thy).
wenzelm@42484
   386
wenzelm@41651
   387
wenzelm@41944
   388
*** ML ***
wenzelm@41944
   389
wenzelm@43731
   390
* The inner syntax of sort/type/term/prop supports inlined YXML
wenzelm@43731
   391
representations within quoted string tokens.  By encoding logical
wenzelm@43731
   392
entities via Term_XML (in ML or Scala) concrete syntax can be
wenzelm@43731
   393
bypassed, which is particularly useful for producing bits of text
wenzelm@43731
   394
under external program control.
wenzelm@43731
   395
wenzelm@43565
   396
* Antiquotations for ML and document preparation are managed as theory
wenzelm@43565
   397
data, which requires explicit setup.
wenzelm@43565
   398
wenzelm@42897
   399
* Isabelle_Process.is_active allows tools to check if the official
wenzelm@42897
   400
process wrapper is running (Isabelle/Scala/jEdit) or the old TTY loop
wenzelm@42897
   401
(better known as Proof General).
wenzelm@42897
   402
wenzelm@42360
   403
* Structure Proof_Context follows standard naming scheme.  Old
wenzelm@42360
   404
ProofContext is still available for some time as legacy alias.
wenzelm@42360
   405
wenzelm@42015
   406
* Structure Timing provides various operations for timing; supersedes
wenzelm@42015
   407
former start_timing/end_timing etc.
wenzelm@42015
   408
wenzelm@41944
   409
* Path.print is the official way to show file-system paths to users
wenzelm@41944
   410
(including quotes etc.).
wenzelm@41944
   411
wenzelm@42056
   412
* Inner syntax: identifiers in parse trees of generic categories
wenzelm@42056
   413
"logic", "aprop", "idt" etc. carry position information (disguised as
wenzelm@42056
   414
type constraints).  Occasional INCOMPATIBILITY with non-compliant
wenzelm@42057
   415
translations that choke on unexpected type constraints.  Positions can
wenzelm@42057
   416
be stripped in ML translations via Syntax.strip_positions /
wenzelm@42057
   417
Syntax.strip_positions_ast, or via the syntax constant
wenzelm@42057
   418
"_strip_positions" within parse trees.  As last resort, positions can
wenzelm@42057
   419
be disabled via the configuration option Syntax.positions, which is
wenzelm@42057
   420
called "syntax_positions" in Isar attribute syntax.
wenzelm@42056
   421
wenzelm@42290
   422
* Discontinued special status of various ML structures that contribute
wenzelm@42290
   423
to structure Syntax (Ast, Lexicon, Mixfix, Parser, Printer etc.): less
wenzelm@42290
   424
pervasive content, no inclusion in structure Syntax.  INCOMPATIBILITY,
wenzelm@42290
   425
refer directly to Ast.Constant, Lexicon.is_identifier,
wenzelm@42290
   426
Syntax_Trans.mk_binder_tr etc.
wenzelm@42224
   427
wenzelm@42247
   428
* Typed print translation: discontinued show_sorts argument, which is
wenzelm@42247
   429
already available via context of "advanced" translation.
wenzelm@42247
   430
wenzelm@42370
   431
* Refined PARALLEL_GOALS tactical: degrades gracefully for schematic
wenzelm@42370
   432
goal states; body tactic needs to address all subgoals uniformly.
wenzelm@42370
   433
wenzelm@42403
   434
* Slightly more special eq_list/eq_set, with shortcut involving
wenzelm@42403
   435
pointer equality (assumes that eq relation is reflexive).
wenzelm@42403
   436
wenzelm@42793
   437
* Classical tactics use proper Proof.context instead of historic types
wenzelm@42793
   438
claset/clasimpset.  Old-style declarations like addIs, addEs, addDs
wenzelm@42793
   439
operate directly on Proof.context.  Raw type claset retains its use as
wenzelm@42793
   440
snapshot of the classical context, which can be recovered via
wenzelm@42793
   441
(put_claset HOL_cs) etc.  Type clasimpset has been discontinued.
wenzelm@42793
   442
INCOMPATIBILITY, classical tactics and derived proof methods require
wenzelm@42793
   443
proper Proof.context.
wenzelm@42793
   444
wenzelm@43752
   445
* Scala layer provides JVM method invocation service for static
wenzelm@43752
   446
methods of type (String)String, see Invoke_Scala.method in ML.
wenzelm@43752
   447
For example:
wenzelm@43752
   448
wenzelm@43752
   449
  Invoke_Scala.method "java.lang.System.getProperty" "java.home"
wenzelm@43752
   450
wenzelm@41944
   451
wenzelm@41703
   452
wenzelm@41512
   453
New in Isabelle2011 (January 2011)
wenzelm@41512
   454
----------------------------------
wenzelm@37383
   455
wenzelm@37536
   456
*** General ***
wenzelm@37536
   457
wenzelm@41573
   458
* Experimental Prover IDE based on Isabelle/Scala and jEdit (see
wenzelm@41612
   459
src/Tools/jEdit).  This also serves as IDE for Isabelle/ML, with
wenzelm@41612
   460
useful tooltips and hyperlinks produced from its static analysis.  The
wenzelm@41612
   461
bundled component provides an executable Isabelle tool that can be run
wenzelm@41612
   462
like this:
wenzelm@41612
   463
wenzelm@41612
   464
  Isabelle2011/bin/isabelle jedit
wenzelm@41573
   465
wenzelm@40948
   466
* Significantly improved Isabelle/Isar implementation manual.
wenzelm@40948
   467
wenzelm@41594
   468
* System settings: ISABELLE_HOME_USER now includes ISABELLE_IDENTIFIER
wenzelm@41595
   469
(and thus refers to something like $HOME/.isabelle/Isabelle2011),
wenzelm@41594
   470
while the default heap location within that directory lacks that extra
wenzelm@41594
   471
suffix.  This isolates multiple Isabelle installations from each
wenzelm@41594
   472
other, avoiding problems with old settings in new versions.
wenzelm@41594
   473
INCOMPATIBILITY, need to copy/upgrade old user settings manually.
wenzelm@41594
   474
wenzelm@40947
   475
* Source files are always encoded as UTF-8, instead of old-fashioned
wenzelm@40947
   476
ISO-Latin-1.  INCOMPATIBILITY.  Isabelle LaTeX documents might require
wenzelm@40948
   477
the following package declarations:
wenzelm@40947
   478
wenzelm@40947
   479
  \usepackage[utf8]{inputenc}
wenzelm@40947
   480
  \usepackage{textcomp}
wenzelm@40947
   481
krauss@41440
   482
* Explicit treatment of UTF-8 sequences as Isabelle symbols, such that
wenzelm@37536
   483
a Unicode character is treated as a single symbol, not a sequence of
wenzelm@37536
   484
non-ASCII bytes as before.  Since Isabelle/ML string literals may
wenzelm@37536
   485
contain symbols without further backslash escapes, Unicode can now be
wenzelm@37536
   486
used here as well.  Recall that Symbol.explode in ML provides a
wenzelm@37536
   487
consistent view on symbols, while raw explode (or String.explode)
wenzelm@37536
   488
merely give a byte-oriented representation.
wenzelm@37536
   489
wenzelm@41594
   490
* Theory loader: source files are primarily located via the master
wenzelm@41594
   491
directory of each theory node (where the .thy file itself resides).
wenzelm@41594
   492
The global load path is still partially available as legacy feature.
wenzelm@41594
   493
Minor INCOMPATIBILITY due to subtle change in file lookup: use
wenzelm@41594
   494
explicit paths, relatively to the theory.
wenzelm@38135
   495
wenzelm@37939
   496
* Special treatment of ML file names has been discontinued.
wenzelm@37939
   497
Historically, optional extensions .ML or .sml were added on demand --
wenzelm@37939
   498
at the cost of clarity of file dependencies.  Recall that Isabelle/ML
wenzelm@37939
   499
files exclusively use the .ML extension.  Minor INCOMPATIBILTY.
wenzelm@37939
   500
wenzelm@38980
   501
* Various options that affect pretty printing etc. are now properly
wenzelm@38767
   502
handled within the context via configuration options, instead of
wenzelm@40879
   503
unsynchronized references or print modes.  There are both ML Config.T
wenzelm@40879
   504
entities and Isar declaration attributes to access these.
wenzelm@38767
   505
wenzelm@39125
   506
  ML (Config.T)                 Isar (attribute)
wenzelm@39125
   507
wenzelm@39128
   508
  eta_contract                  eta_contract
wenzelm@39137
   509
  show_brackets                 show_brackets
wenzelm@39134
   510
  show_sorts                    show_sorts
wenzelm@39134
   511
  show_types                    show_types
wenzelm@39126
   512
  show_question_marks           show_question_marks
wenzelm@39126
   513
  show_consts                   show_consts
wenzelm@40879
   514
  show_abbrevs                  show_abbrevs
wenzelm@39126
   515
wenzelm@41379
   516
  Syntax.ast_trace              syntax_ast_trace
wenzelm@41379
   517
  Syntax.ast_stat               syntax_ast_stat
wenzelm@39126
   518
  Syntax.ambiguity_level        syntax_ambiguity_level
wenzelm@39126
   519
wenzelm@39126
   520
  Goal_Display.goals_limit      goals_limit
wenzelm@39126
   521
  Goal_Display.show_main_goal   show_main_goal
wenzelm@39126
   522
wenzelm@41379
   523
  Method.rule_trace             rule_trace
wenzelm@41379
   524
wenzelm@39125
   525
  Thy_Output.display            thy_output_display
wenzelm@39125
   526
  Thy_Output.quotes             thy_output_quotes
wenzelm@39125
   527
  Thy_Output.indent             thy_output_indent
wenzelm@39125
   528
  Thy_Output.source             thy_output_source
wenzelm@39125
   529
  Thy_Output.break              thy_output_break
wenzelm@39125
   530
krauss@41440
   531
Note that corresponding "..._default" references in ML may only be
wenzelm@38767
   532
changed globally at the ROOT session setup, but *not* within a theory.
wenzelm@40879
   533
The option "show_abbrevs" supersedes the former print mode
wenzelm@40879
   534
"no_abbrevs" with inverted meaning.
wenzelm@38767
   535
wenzelm@40878
   536
* More systematic naming of some configuration options.
huffman@41294
   537
INCOMPATIBILITY.
wenzelm@40878
   538
wenzelm@40878
   539
  trace_simp  ~>  simp_trace
wenzelm@40878
   540
  debug_simp  ~>  simp_debug
wenzelm@40878
   541
wenzelm@40291
   542
* Support for real valued configuration options, using simplistic
wenzelm@40291
   543
floating-point notation that coincides with the inner syntax for
wenzelm@40291
   544
float_token.
wenzelm@40291
   545
wenzelm@41594
   546
* Support for real valued preferences (with approximative PGIP type):
wenzelm@41594
   547
front-ends need to accept "pgint" values in float notation.
wenzelm@41594
   548
INCOMPATIBILITY.
wenzelm@41573
   549
wenzelm@41573
   550
* The IsabelleText font now includes Cyrillic, Hebrew, Arabic from
wenzelm@41573
   551
DejaVu Sans.
wenzelm@41573
   552
wenzelm@41594
   553
* Discontinued support for Poly/ML 5.0 and 5.1 versions.
wenzelm@41594
   554
wenzelm@40948
   555
wenzelm@40948
   556
*** Pure ***
wenzelm@40948
   557
wenzelm@41249
   558
* Command 'type_synonym' (with single argument) replaces somewhat
wenzelm@41249
   559
outdated 'types', which is still available as legacy feature for some
wenzelm@41249
   560
time.
wenzelm@41249
   561
wenzelm@41249
   562
* Command 'nonterminal' (with 'and' separated list of arguments)
wenzelm@41249
   563
replaces somewhat outdated 'nonterminals'.  INCOMPATIBILITY.
wenzelm@41229
   564
wenzelm@40965
   565
* Command 'notepad' replaces former 'example_proof' for
wenzelm@41020
   566
experimentation in Isar without any result.  INCOMPATIBILITY.
wenzelm@40965
   567
ballarin@41435
   568
* Locale interpretation commands 'interpret' and 'sublocale' accept
ballarin@41435
   569
lists of equations to map definitions in a locale to appropriate
ballarin@41435
   570
entities in the context of the interpretation.  The 'interpretation'
ballarin@41435
   571
command already provided this functionality.
ballarin@41435
   572
wenzelm@41594
   573
* Diagnostic command 'print_dependencies' prints the locale instances
wenzelm@41594
   574
that would be activated if the specified expression was interpreted in
wenzelm@41594
   575
the current context.  Variant "print_dependencies!" assumes a context
wenzelm@41594
   576
without interpretations.
ballarin@38110
   577
ballarin@38110
   578
* Diagnostic command 'print_interps' prints interpretations in proofs
ballarin@38110
   579
in addition to interpretations in theories.
ballarin@38110
   580
wenzelm@38708
   581
* Discontinued obsolete 'global' and 'local' commands to manipulate
wenzelm@38708
   582
the theory name space.  Rare INCOMPATIBILITY.  The ML functions
wenzelm@38708
   583
Sign.root_path and Sign.local_path may be applied directly where this
wenzelm@38708
   584
feature is still required for historical reasons.
wenzelm@38708
   585
wenzelm@40948
   586
* Discontinued obsolete 'constdefs' command.  INCOMPATIBILITY, use
haftmann@39215
   587
'definition' instead.
haftmann@39215
   588
wenzelm@41574
   589
* The "prems" fact, which refers to the accidental collection of
wenzelm@41574
   590
foundational premises in the context, is now explicitly marked as
wenzelm@41594
   591
legacy feature and will be discontinued soon.  Consider using "assms"
wenzelm@41594
   592
of the head statement or reference facts by explicit names.
wenzelm@41574
   593
wenzelm@40801
   594
* Document antiquotations @{class} and @{type} print classes and type
wenzelm@40801
   595
constructors.
wenzelm@40801
   596
wenzelm@40801
   597
* Document antiquotation @{file} checks file/directory entries within
wenzelm@40801
   598
the local file system.
haftmann@39305
   599
ballarin@38110
   600
haftmann@37387
   601
*** HOL ***
haftmann@37387
   602
wenzelm@41594
   603
* Coercive subtyping: functions can be declared as coercions and type
wenzelm@41594
   604
inference will add them as necessary upon input of a term.  Theory
wenzelm@41594
   605
Complex_Main declares real :: nat => real and real :: int => real as
wenzelm@41594
   606
coercions. A coercion function f is declared like this:
wenzelm@40939
   607
wenzelm@40939
   608
  declare [[coercion f]]
nipkow@40866
   609
wenzelm@41571
   610
To lift coercions through type constructors (e.g. from nat => real to
nipkow@40866
   611
nat list => real list), map functions can be declared, e.g.
nipkow@40866
   612
wenzelm@40939
   613
  declare [[coercion_map map]]
wenzelm@40939
   614
wenzelm@40939
   615
Currently coercion inference is activated only in theories including
wenzelm@40939
   616
real numbers, i.e. descendants of Complex_Main.  This is controlled by
wenzelm@41020
   617
the configuration option "coercion_enabled", e.g. it can be enabled in
wenzelm@40939
   618
other theories like this:
wenzelm@40939
   619
wenzelm@40939
   620
  declare [[coercion_enabled]]
nipkow@40866
   621
wenzelm@41571
   622
* Command 'partial_function' provides basic support for recursive
wenzelm@41571
   623
function definitions over complete partial orders.  Concrete instances
krauss@40183
   624
are provided for i) the option type, ii) tail recursion on arbitrary
wenzelm@41571
   625
types, and iii) the heap monad of Imperative_HOL.  See
wenzelm@41571
   626
src/HOL/ex/Fundefs.thy and src/HOL/Imperative_HOL/ex/Linked_Lists.thy
wenzelm@41571
   627
for examples.
krauss@40183
   628
wenzelm@41571
   629
* Function package: f.psimps rules are no longer implicitly declared
wenzelm@41571
   630
as [simp].  INCOMPATIBILITY.
haftmann@41398
   631
haftmann@41398
   632
* Datatype package: theorems generated for executable equality (class
wenzelm@41571
   633
"eq") carry proper names and are treated as default code equations.
wenzelm@41571
   634
wenzelm@41594
   635
* Inductive package: now offers command 'inductive_simps' to
wenzelm@41594
   636
automatically derive instantiated and simplified equations for
wenzelm@41594
   637
inductive predicates, similar to 'inductive_cases'.
wenzelm@41594
   638
wenzelm@41571
   639
* Command 'enriched_type' allows to register properties of the
wenzelm@41571
   640
functorial structure of types.
haftmann@39771
   641
haftmann@39644
   642
* Improved infrastructure for term evaluation using code generator
haftmann@39644
   643
techniques, in particular static evaluation conversions.
haftmann@39644
   644
wenzelm@41594
   645
* Code generator: Scala (2.8 or higher) has been added to the target
wenzelm@41594
   646
languages.
wenzelm@41594
   647
haftmann@41398
   648
* Code generator: globbing constant expressions "*" and "Theory.*"
haftmann@41398
   649
have been replaced by the more idiomatic "_" and "Theory._".
haftmann@41398
   650
INCOMPATIBILITY.
haftmann@41398
   651
haftmann@41398
   652
* Code generator: export_code without explicit file declaration prints
haftmann@41398
   653
to standard output.  INCOMPATIBILITY.
haftmann@41398
   654
haftmann@41398
   655
* Code generator: do not print function definitions for case
haftmann@41398
   656
combinators any longer.
haftmann@41398
   657
wenzelm@41594
   658
* Code generator: simplification with rules determined with
wenzelm@41571
   659
src/Tools/Code/code_simp.ML and method "code_simp".
wenzelm@41571
   660
wenzelm@41594
   661
* Code generator for records: more idiomatic representation of record
wenzelm@40948
   662
types.  Warning: records are not covered by ancient SML code
wenzelm@40948
   663
generation any longer.  INCOMPATIBILITY.  In cases of need, a suitable
wenzelm@40948
   664
rep_datatype declaration helps to succeed then:
haftmann@38537
   665
haftmann@38537
   666
  record 'a foo = ...
haftmann@38537
   667
  ...
haftmann@38537
   668
  rep_datatype foo_ext ...
haftmann@38535
   669
wenzelm@41594
   670
* Records: logical foundation type for records does not carry a
wenzelm@41594
   671
'_type' suffix any longer (obsolete due to authentic syntax).
wenzelm@41594
   672
INCOMPATIBILITY.
wenzelm@41594
   673
haftmann@41398
   674
* Quickcheck now by default uses exhaustive testing instead of random
wenzelm@41571
   675
testing.  Random testing can be invoked by "quickcheck [random]",
wenzelm@41571
   676
exhaustive testing by "quickcheck [exhaustive]".
haftmann@41398
   677
haftmann@41398
   678
* Quickcheck instantiates polymorphic types with small finite
haftmann@41398
   679
datatypes by default. This enables a simple execution mechanism to
haftmann@41398
   680
handle quantifiers and function equality over the finite datatypes.
haftmann@41398
   681
wenzelm@41571
   682
* Quickcheck random generator has been renamed from "code" to
wenzelm@41571
   683
"random".  INCOMPATIBILITY.
haftmann@41398
   684
haftmann@41398
   685
* Quickcheck now has a configurable time limit which is set to 30
haftmann@41398
   686
seconds by default. This can be changed by adding [timeout = n] to the
haftmann@41398
   687
quickcheck command. The time limit for Auto Quickcheck is still set
haftmann@41398
   688
independently.
haftmann@38461
   689
haftmann@38461
   690
* Quickcheck in locales considers interpretations of that locale for
haftmann@38461
   691
counter example search.
haftmann@38461
   692
blanchet@40059
   693
* Sledgehammer:
wenzelm@41571
   694
  - Added "smt" and "remote_smt" provers based on the "smt" proof
wenzelm@41571
   695
    method. See the Sledgehammer manual for details ("isabelle doc
wenzelm@41571
   696
    sledgehammer").
blanchet@40059
   697
  - Renamed commands:
blanchet@40059
   698
    sledgehammer atp_info ~> sledgehammer running_provers
blanchet@40059
   699
    sledgehammer atp_kill ~> sledgehammer kill_provers
blanchet@40059
   700
    sledgehammer available_atps ~> sledgehammer available_provers
blanchet@40059
   701
    INCOMPATIBILITY.
blanchet@40059
   702
  - Renamed options:
blanchet@40059
   703
    sledgehammer [atps = ...] ~> sledgehammer [provers = ...]
blanchet@40062
   704
    sledgehammer [atp = ...] ~> sledgehammer [prover = ...]
blanchet@40341
   705
    sledgehammer [timeout = 77 s] ~> sledgehammer [timeout = 77]
blanchet@40341
   706
    (and "ms" and "min" are no longer supported)
blanchet@40341
   707
    INCOMPATIBILITY.
blanchet@40341
   708
blanchet@40341
   709
* Nitpick:
blanchet@40341
   710
  - Renamed options:
blanchet@40341
   711
    nitpick [timeout = 77 s] ~> nitpick [timeout = 77]
blanchet@40341
   712
    nitpick [tac_timeout = 777 ms] ~> nitpick [tac_timeout = 0.777]
blanchet@40059
   713
    INCOMPATIBILITY.
blanchet@40725
   714
  - Added support for partial quotient types.
blanchet@40725
   715
  - Added local versions of the "Nitpick.register_xxx" functions.
blanchet@40725
   716
  - Added "whack" option.
blanchet@40725
   717
  - Allow registration of quotient types as codatatypes.
blanchet@40725
   718
  - Improved "merge_type_vars" option to merge more types.
blanchet@40725
   719
  - Removed unsound "fast_descrs" option.
blanchet@40725
   720
  - Added custom symmetry breaking for datatypes, making it possible to reach
blanchet@40725
   721
    higher cardinalities.
blanchet@40725
   722
  - Prevent the expansion of too large definitions.
blanchet@39957
   723
wenzelm@41571
   724
* Proof methods "metis" and "meson" now have configuration options
wenzelm@41571
   725
"meson_trace", "metis_trace", and "metis_verbose" that can be enabled
wenzelm@41571
   726
to diagnose these tools. E.g.
wenzelm@41571
   727
wenzelm@41571
   728
    using [[metis_trace = true]]
wenzelm@41571
   729
haftmann@41398
   730
* Auto Solve: Renamed "Auto Solve Direct".  The tool is now available
haftmann@41398
   731
manually as command 'solve_direct'.
haftmann@41398
   732
boehmes@41601
   733
* The default SMT solver Z3 must be enabled explicitly (due to
boehmes@41601
   734
licensing issues) by setting the environment variable
wenzelm@41603
   735
Z3_NON_COMMERCIAL in etc/settings of the component, for example.  For
wenzelm@41603
   736
commercial applications, the SMT solver CVC3 is provided as fall-back;
wenzelm@41603
   737
changing the SMT solver is done via the configuration option
wenzelm@41603
   738
"smt_solver".
boehmes@41432
   739
boehmes@41432
   740
* Remote SMT solvers need to be referred to by the "remote_" prefix,
wenzelm@41571
   741
i.e. "remote_cvc3" and "remote_z3".
wenzelm@41571
   742
wenzelm@41571
   743
* Added basic SMT support for datatypes, records, and typedefs using
wenzelm@41571
   744
the oracle mode (no proofs).  Direct support of pairs has been dropped
wenzelm@41571
   745
in exchange (pass theorems fst_conv snd_conv pair_collapse to the SMT
wenzelm@41571
   746
support for a similar behavior).  Minor INCOMPATIBILITY.
boehmes@41432
   747
boehmes@40162
   748
* Changed SMT configuration options:
boehmes@40162
   749
  - Renamed:
boehmes@41432
   750
    z3_proofs ~> smt_oracle (with inverted meaning)
boehmes@40162
   751
    z3_trace_assms ~> smt_trace_used_facts
boehmes@40162
   752
    INCOMPATIBILITY.
boehmes@40162
   753
  - Added:
boehmes@40424
   754
    smt_verbose
boehmes@41432
   755
    smt_random_seed
boehmes@40424
   756
    smt_datatypes
boehmes@41432
   757
    smt_infer_triggers
boehmes@41432
   758
    smt_monomorph_limit
boehmes@40162
   759
    cvc3_options
boehmes@41432
   760
    remote_cvc3_options
boehmes@41432
   761
    remote_z3_options
boehmes@40162
   762
    yices_options
blanchet@39957
   763
wenzelm@40948
   764
* Boogie output files (.b2i files) need to be declared in the theory
wenzelm@40948
   765
header.
boehmes@40580
   766
wenzelm@41594
   767
* Simplification procedure "list_to_set_comprehension" rewrites list
wenzelm@41594
   768
comprehensions applied to List.set to set comprehensions.  Occasional
wenzelm@41594
   769
INCOMPATIBILITY, may be deactivated like this:
wenzelm@41594
   770
wenzelm@41594
   771
  declare [[simproc del: list_to_set_comprehension]]
wenzelm@41594
   772
wenzelm@41573
   773
* Removed old version of primrec package.  INCOMPATIBILITY.
haftmann@41398
   774
haftmann@41398
   775
* Removed simplifier congruence rule of "prod_case", as has for long
haftmann@41398
   776
been the case with "split".  INCOMPATIBILITY.
haftmann@41398
   777
haftmann@41398
   778
* String.literal is a type, but not a datatype.  INCOMPATIBILITY.
haftmann@41398
   779
krauss@40388
   780
* Removed [split_format ... and ... and ...] version of
krauss@40388
   781
[split_format].  Potential INCOMPATIBILITY.
krauss@40388
   782
wenzelm@41571
   783
* Predicate "sorted" now defined inductively, with nice induction
wenzelm@41571
   784
rules.  INCOMPATIBILITY: former sorted.simps now named sorted_simps.
haftmann@41398
   785
haftmann@41398
   786
* Constant "contents" renamed to "the_elem", to free the generic name
haftmann@41398
   787
contents for other uses.  INCOMPATIBILITY.
haftmann@41398
   788
haftmann@41398
   789
* Renamed class eq and constant eq (for code generation) to class
haftmann@41398
   790
equal and constant equal, plus renaming of related facts and various
haftmann@41398
   791
tuning.  INCOMPATIBILITY.
haftmann@41398
   792
haftmann@41398
   793
* Dropped type classes mult_mono and mult_mono1.  INCOMPATIBILITY.
haftmann@41398
   794
wenzelm@41571
   795
* Removed output syntax "'a ~=> 'b" for "'a => 'b option".
wenzelm@41571
   796
INCOMPATIBILITY.
haftmann@41398
   797
haftmann@41398
   798
* Renamed theory Fset to Cset, type Fset.fset to Cset.set, in order to
haftmann@41398
   799
avoid confusion with finite sets.  INCOMPATIBILITY.
haftmann@41398
   800
haftmann@41398
   801
* Abandoned locales equiv, congruent and congruent2 for equivalence
haftmann@41398
   802
relations.  INCOMPATIBILITY: use equivI rather than equiv_intro (same
haftmann@41398
   803
for congruent(2)).
haftmann@41398
   804
haftmann@41398
   805
* Some previously unqualified names have been qualified:
haftmann@41398
   806
haftmann@41398
   807
  types
haftmann@41398
   808
    bool ~> HOL.bool
haftmann@41398
   809
    nat ~> Nat.nat
haftmann@41398
   810
haftmann@41398
   811
  constants
haftmann@41398
   812
    Trueprop ~> HOL.Trueprop
haftmann@41398
   813
    True ~> HOL.True
haftmann@41398
   814
    False ~> HOL.False
haftmann@41398
   815
    op & ~> HOL.conj
haftmann@41398
   816
    op | ~> HOL.disj
haftmann@41398
   817
    op --> ~> HOL.implies
haftmann@41398
   818
    op = ~> HOL.eq
haftmann@41398
   819
    Not ~> HOL.Not
haftmann@41398
   820
    The ~> HOL.The
haftmann@41398
   821
    All ~> HOL.All
haftmann@41398
   822
    Ex ~> HOL.Ex
haftmann@41398
   823
    Ex1 ~> HOL.Ex1
haftmann@41398
   824
    Let ~> HOL.Let
haftmann@41398
   825
    If ~> HOL.If
haftmann@41398
   826
    Ball ~> Set.Ball
haftmann@41398
   827
    Bex ~> Set.Bex
haftmann@41398
   828
    Suc ~> Nat.Suc
haftmann@41398
   829
    Pair ~> Product_Type.Pair
haftmann@41398
   830
    fst ~> Product_Type.fst
haftmann@41398
   831
    snd ~> Product_Type.snd
haftmann@41398
   832
    curry ~> Product_Type.curry
haftmann@41398
   833
    op : ~> Set.member
haftmann@41398
   834
    Collect ~> Set.Collect
haftmann@41398
   835
haftmann@41398
   836
INCOMPATIBILITY.
haftmann@41398
   837
haftmann@41398
   838
* More canonical naming convention for some fundamental definitions:
haftmann@41398
   839
haftmann@41398
   840
    bot_bool_eq ~> bot_bool_def
haftmann@41398
   841
    top_bool_eq ~> top_bool_def
haftmann@41398
   842
    inf_bool_eq ~> inf_bool_def
haftmann@41398
   843
    sup_bool_eq ~> sup_bool_def
haftmann@41398
   844
    bot_fun_eq  ~> bot_fun_def
haftmann@41398
   845
    top_fun_eq  ~> top_fun_def
haftmann@41398
   846
    inf_fun_eq  ~> inf_fun_def
haftmann@41398
   847
    sup_fun_eq  ~> sup_fun_def
haftmann@41398
   848
haftmann@41398
   849
INCOMPATIBILITY.
haftmann@41398
   850
haftmann@41398
   851
* More stylized fact names:
haftmann@41398
   852
haftmann@41398
   853
  expand_fun_eq ~> fun_eq_iff
haftmann@41398
   854
  expand_set_eq ~> set_eq_iff
haftmann@41398
   855
  set_ext       ~> set_eqI
haftmann@41398
   856
  nat_number    ~> eval_nat_numeral
haftmann@41398
   857
haftmann@41398
   858
INCOMPATIBILITY.
haftmann@41398
   859
wenzelm@41571
   860
* Refactoring of code-generation specific operations in theory List:
haftmann@41398
   861
haftmann@41398
   862
  constants
haftmann@41398
   863
    null ~> List.null
haftmann@41398
   864
haftmann@41398
   865
  facts
haftmann@41398
   866
    mem_iff ~> member_def
haftmann@41398
   867
    null_empty ~> null_def
haftmann@41398
   868
haftmann@41398
   869
INCOMPATIBILITY.  Note that these were not supposed to be used
haftmann@41398
   870
regularly unless for striking reasons; their main purpose was code
haftmann@41398
   871
generation.
haftmann@41398
   872
haftmann@41398
   873
Various operations from the Haskell prelude are used for generating
haftmann@41398
   874
Haskell code.
haftmann@41398
   875
wenzelm@41571
   876
* Term "bij f" is now an abbreviation of "bij_betw f UNIV UNIV".  Term
wenzelm@41571
   877
"surj f" is now an abbreviation of "range f = UNIV".  The theorems
wenzelm@41571
   878
bij_def and surj_def are unchanged.  INCOMPATIBILITY.
haftmann@41398
   879
haftmann@41398
   880
* Abolished some non-alphabetic type names: "prod" and "sum" replace
haftmann@41398
   881
"*" and "+" respectively.  INCOMPATIBILITY.
haftmann@41398
   882
haftmann@41398
   883
* Name "Plus" of disjoint sum operator "<+>" is now hidden.  Write
wenzelm@41571
   884
"Sum_Type.Plus" instead.
haftmann@41398
   885
haftmann@41398
   886
* Constant "split" has been merged with constant "prod_case"; names of
haftmann@41398
   887
ML functions, facts etc. involving split have been retained so far,
haftmann@41398
   888
though.  INCOMPATIBILITY.
haftmann@41398
   889
haftmann@41398
   890
* Dropped old infix syntax "_ mem _" for List.member; use "_ : set _"
haftmann@41398
   891
instead.  INCOMPATIBILITY.
haftmann@41398
   892
wenzelm@41571
   893
* Removed lemma "Option.is_none_none" which duplicates "is_none_def".
haftmann@41398
   894
INCOMPATIBILITY.
haftmann@41398
   895
wenzelm@41594
   896
* Former theory Library/Enum is now part of the HOL-Main image.
wenzelm@41594
   897
INCOMPATIBILITY: all constants of the Enum theory now have to be
wenzelm@41594
   898
referred to by its qualified name.
wenzelm@41594
   899
wenzelm@41594
   900
  enum    ~>  Enum.enum
wenzelm@41594
   901
  nlists  ~>  Enum.nlists
wenzelm@41594
   902
  product ~>  Enum.product
wenzelm@41594
   903
wenzelm@41594
   904
* Theory Library/Monad_Syntax provides do-syntax for monad types.
wenzelm@41594
   905
Syntax in Library/State_Monad has been changed to avoid ambiguities.
wenzelm@41594
   906
INCOMPATIBILITY.
wenzelm@41594
   907
wenzelm@41594
   908
* Theory Library/SetsAndFunctions has been split into
wenzelm@41594
   909
Library/Function_Algebras and Library/Set_Algebras; canonical names
wenzelm@41594
   910
for instance definitions for functions; various improvements.
wenzelm@41594
   911
INCOMPATIBILITY.
wenzelm@41594
   912
wenzelm@41594
   913
* Theory Library/Multiset provides stable quicksort implementation of
wenzelm@41594
   914
sort_key.
wenzelm@41594
   915
wenzelm@41594
   916
* Theory Library/Multiset: renamed empty_idemp ~> empty_neutral.
wenzelm@41594
   917
INCOMPATIBILITY.
wenzelm@41594
   918
wenzelm@41594
   919
* Session Multivariate_Analysis: introduced a type class for euclidean
wenzelm@41594
   920
space.  Most theorems are now stated in terms of euclidean spaces
wenzelm@41594
   921
instead of finite cartesian products.
wenzelm@41594
   922
wenzelm@41594
   923
  types
wenzelm@41594
   924
    real ^ 'n ~>  'a::real_vector
wenzelm@41594
   925
              ~>  'a::euclidean_space
wenzelm@41594
   926
              ~>  'a::ordered_euclidean_space
wenzelm@41594
   927
        (depends on your needs)
wenzelm@41594
   928
wenzelm@41594
   929
  constants
wenzelm@41594
   930
     _ $ _        ~> _ $$ _
wenzelm@41594
   931
     \<chi> x. _  ~> \<chi>\<chi> x. _
wenzelm@41594
   932
     CARD('n)     ~> DIM('a)
wenzelm@41594
   933
wenzelm@41594
   934
Also note that the indices are now natural numbers and not from some
wenzelm@41594
   935
finite type. Finite cartesian products of euclidean spaces, products
wenzelm@41594
   936
of euclidean spaces the real and complex numbers are instantiated to
wenzelm@41594
   937
be euclidean_spaces.  INCOMPATIBILITY.
wenzelm@41594
   938
wenzelm@41594
   939
* Session Probability: introduced pextreal as positive extended real
wenzelm@41594
   940
numbers.  Use pextreal as value for measures.  Introduce the
wenzelm@41594
   941
Radon-Nikodym derivative, product spaces and Fubini's theorem for
wenzelm@41594
   942
arbitrary sigma finite measures.  Introduces Lebesgue measure based on
wenzelm@41594
   943
the integral in Multivariate Analysis.  INCOMPATIBILITY.
wenzelm@41594
   944
wenzelm@41594
   945
* Session Imperative_HOL: revamped, corrected dozens of inadequacies.
wenzelm@41594
   946
INCOMPATIBILITY.
wenzelm@41594
   947
wenzelm@41594
   948
* Session SPARK (with image HOL-SPARK) provides commands to load and
wenzelm@41594
   949
prove verification conditions generated by the SPARK Ada program
wenzelm@41594
   950
verifier.  See also src/HOL/SPARK and src/HOL/SPARK/Examples.
berghofe@41567
   951
huffman@40621
   952
ballarin@41433
   953
*** HOL-Algebra ***
ballarin@41433
   954
ballarin@41433
   955
* Theorems for additive ring operations (locale abelian_monoid and
ballarin@41433
   956
descendants) are generated by interpretation from their multiplicative
ballarin@41434
   957
counterparts.  Names (in particular theorem names) have the mandatory
ballarin@41434
   958
qualifier 'add'.  Previous theorem names are redeclared for
ballarin@41434
   959
compatibility.
ballarin@41434
   960
wenzelm@41571
   961
* Structure "int_ring" is now an abbreviation (previously a
ballarin@41434
   962
definition).  This fits more natural with advanced interpretations.
ballarin@41433
   963
ballarin@41433
   964
huffman@40621
   965
*** HOLCF ***
huffman@40621
   966
huffman@40621
   967
* The domain package now runs in definitional mode by default: The
wenzelm@41571
   968
former command 'new_domain' is now called 'domain'.  To use the domain
huffman@40621
   969
package in its original axiomatic mode, use 'domain (unsafe)'.
huffman@40621
   970
INCOMPATIBILITY.
huffman@40621
   971
wenzelm@41571
   972
* The new class "domain" is now the default sort.  Class "predomain"
wenzelm@41571
   973
is an unpointed version of "domain". Theories can be updated by
wenzelm@41571
   974
replacing sort annotations as shown below.  INCOMPATIBILITY.
huffman@40621
   975
huffman@40621
   976
  'a::type ~> 'a::countable
huffman@40621
   977
  'a::cpo  ~> 'a::predomain
huffman@40621
   978
  'a::pcpo ~> 'a::domain
huffman@40621
   979
wenzelm@41571
   980
* The old type class "rep" has been superseded by class "domain".
huffman@40621
   981
Accordingly, users of the definitional package must remove any
wenzelm@41571
   982
"default_sort rep" declarations.  INCOMPATIBILITY.
huffman@40621
   983
huffman@41401
   984
* The domain package (definitional mode) now supports unpointed
huffman@41401
   985
predomain argument types, as long as they are marked 'lazy'. (Strict
wenzelm@41571
   986
arguments must be in class "domain".) For example, the following
huffman@41401
   987
domain definition now works:
huffman@41401
   988
huffman@41401
   989
  domain natlist = nil | cons (lazy "nat discr") (lazy "natlist")
huffman@41401
   990
huffman@41401
   991
* Theory HOLCF/Library/HOL_Cpo provides cpo and predomain class
wenzelm@41571
   992
instances for types from main HOL: bool, nat, int, char, 'a + 'b,
wenzelm@41571
   993
'a option, and 'a list.  Additionally, it configures fixrec and the
wenzelm@41571
   994
domain package to work with these types.  For example:
huffman@41401
   995
huffman@41401
   996
  fixrec isInl :: "('a + 'b) u -> tr"
huffman@41401
   997
    where "isInl$(up$(Inl x)) = TT" | "isInl$(up$(Inr y)) = FF"
huffman@41401
   998
huffman@41401
   999
  domain V = VFun (lazy "V -> V") | VCon (lazy "nat") (lazy "V list")
huffman@41401
  1000
wenzelm@41571
  1001
* The "(permissive)" option of fixrec has been replaced with a
wenzelm@41571
  1002
per-equation "(unchecked)" option. See
wenzelm@41571
  1003
src/HOL/HOLCF/Tutorial/Fixrec_ex.thy for examples. INCOMPATIBILITY.
wenzelm@41571
  1004
wenzelm@41571
  1005
* The "bifinite" class no longer fixes a constant "approx"; the class
wenzelm@41571
  1006
now just asserts that such a function exists.  INCOMPATIBILITY.
wenzelm@41571
  1007
wenzelm@41571
  1008
* Former type "alg_defl" has been renamed to "defl".  HOLCF no longer
huffman@41287
  1009
defines an embedding of type 'a defl into udom by default; instances
wenzelm@41571
  1010
of "bifinite" and "domain" classes are available in
wenzelm@41571
  1011
src/HOL/HOLCF/Library/Defl_Bifinite.thy.
wenzelm@41571
  1012
wenzelm@41571
  1013
* The syntax "REP('a)" has been replaced with "DEFL('a)".
wenzelm@41571
  1014
wenzelm@41571
  1015
* The predicate "directed" has been removed.  INCOMPATIBILITY.
wenzelm@41571
  1016
wenzelm@41571
  1017
* The type class "finite_po" has been removed.  INCOMPATIBILITY.
wenzelm@41571
  1018
wenzelm@41571
  1019
* The function "cprod_map" has been renamed to "prod_map".
huffman@41401
  1020
INCOMPATIBILITY.
huffman@41401
  1021
huffman@41401
  1022
* The monadic bind operator on each powerdomain has new binder syntax
wenzelm@41571
  1023
similar to sets, e.g. "\<Union>\<sharp>x\<in>xs. t" represents
wenzelm@41571
  1024
"upper_bind\<cdot>xs\<cdot>(\<Lambda> x. t)".
huffman@41401
  1025
huffman@41401
  1026
* The infix syntax for binary union on each powerdomain has changed
wenzelm@41571
  1027
from e.g. "+\<sharp>" to "\<union>\<sharp>", for consistency with set
wenzelm@41571
  1028
syntax.  INCOMPATIBILITY.
wenzelm@41571
  1029
wenzelm@41571
  1030
* The constant "UU" has been renamed to "bottom".  The syntax "UU" is
huffman@41429
  1031
still supported as an input translation.
huffman@41429
  1032
huffman@40621
  1033
* Renamed some theorems (the original names are also still available).
wenzelm@41571
  1034
huffman@40621
  1035
  expand_fun_below   ~> fun_below_iff
huffman@40621
  1036
  below_fun_ext      ~> fun_belowI
huffman@40621
  1037
  expand_cfun_eq     ~> cfun_eq_iff
huffman@40621
  1038
  ext_cfun           ~> cfun_eqI
huffman@40621
  1039
  expand_cfun_below  ~> cfun_below_iff
huffman@40621
  1040
  below_cfun_ext     ~> cfun_belowI
huffman@40621
  1041
  cont2cont_Rep_CFun ~> cont2cont_APP
huffman@40621
  1042
huffman@40621
  1043
* The Abs and Rep functions for various types have changed names.
wenzelm@40948
  1044
Related theorem names have also changed to match. INCOMPATIBILITY.
wenzelm@41571
  1045
huffman@40621
  1046
  Rep_CFun  ~> Rep_cfun
huffman@40621
  1047
  Abs_CFun  ~> Abs_cfun
huffman@40621
  1048
  Rep_Sprod ~> Rep_sprod
huffman@40621
  1049
  Abs_Sprod ~> Abs_sprod
huffman@40621
  1050
  Rep_Ssum  ~> Rep_ssum
huffman@40621
  1051
  Abs_Ssum  ~> Abs_ssum
huffman@40621
  1052
huffman@40621
  1053
* Lemmas with names of the form *_defined_iff or *_strict_iff have
wenzelm@41571
  1054
been renamed to *_bottom_iff.  INCOMPATIBILITY.
huffman@40621
  1055
huffman@40621
  1056
* Various changes to bisimulation/coinduction with domain package:
wenzelm@41571
  1057
wenzelm@41571
  1058
  - Definitions of "bisim" constants no longer mention definedness.
wenzelm@41571
  1059
  - With mutual recursion, "bisim" predicate is now curried.
huffman@40621
  1060
  - With mutual recursion, each type gets a separate coind theorem.
huffman@40621
  1061
  - Variable names in bisim_def and coinduct rules have changed.
wenzelm@41571
  1062
huffman@40621
  1063
INCOMPATIBILITY.
huffman@40621
  1064
wenzelm@41571
  1065
* Case combinators generated by the domain package for type "foo" are
wenzelm@41571
  1066
now named "foo_case" instead of "foo_when".  INCOMPATIBILITY.
huffman@40621
  1067
huffman@40771
  1068
* Several theorems have been renamed to more accurately reflect the
wenzelm@41571
  1069
names of constants and types involved.  INCOMPATIBILITY.
wenzelm@41571
  1070
huffman@40771
  1071
  thelub_const    ~> lub_const
huffman@40771
  1072
  lub_const       ~> is_lub_const
huffman@40771
  1073
  thelubI         ~> lub_eqI
huffman@40771
  1074
  is_lub_lub      ~> is_lubD2
huffman@40771
  1075
  lubI            ~> is_lub_lub
huffman@40771
  1076
  unique_lub      ~> is_lub_unique
huffman@40771
  1077
  is_ub_lub       ~> is_lub_rangeD1
huffman@40771
  1078
  lub_bin_chain   ~> is_lub_bin_chain
huffman@41030
  1079
  lub_fun         ~> is_lub_fun
huffman@41030
  1080
  thelub_fun      ~> lub_fun
huffman@41031
  1081
  thelub_cfun     ~> lub_cfun
huffman@40771
  1082
  thelub_Pair     ~> lub_Pair
huffman@40771
  1083
  lub_cprod       ~> is_lub_prod
huffman@40771
  1084
  thelub_cprod    ~> lub_prod
huffman@40771
  1085
  minimal_cprod   ~> minimal_prod
huffman@40771
  1086
  inst_cprod_pcpo ~> inst_prod_pcpo
huffman@41430
  1087
  UU_I            ~> bottomI
huffman@41430
  1088
  compact_UU      ~> compact_bottom
huffman@41430
  1089
  deflation_UU    ~> deflation_bottom
huffman@41430
  1090
  finite_deflation_UU ~> finite_deflation_bottom
huffman@40771
  1091
wenzelm@41571
  1092
* Many legacy theorem names have been discontinued.  INCOMPATIBILITY.
wenzelm@41571
  1093
huffman@40621
  1094
  sq_ord_less_eq_trans ~> below_eq_trans
huffman@40621
  1095
  sq_ord_eq_less_trans ~> eq_below_trans
huffman@40621
  1096
  refl_less            ~> below_refl
huffman@40621
  1097
  trans_less           ~> below_trans
huffman@40621
  1098
  antisym_less         ~> below_antisym
huffman@40621
  1099
  antisym_less_inverse ~> po_eq_conv [THEN iffD1]
huffman@40621
  1100
  box_less             ~> box_below
huffman@40621
  1101
  rev_trans_less       ~> rev_below_trans
huffman@40621
  1102
  not_less2not_eq      ~> not_below2not_eq
huffman@40621
  1103
  less_UU_iff          ~> below_UU_iff
huffman@40621
  1104
  flat_less_iff        ~> flat_below_iff
huffman@40621
  1105
  adm_less             ~> adm_below
huffman@40621
  1106
  adm_not_less         ~> adm_not_below
huffman@40621
  1107
  adm_compact_not_less ~> adm_compact_not_below
huffman@40621
  1108
  less_fun_def         ~> below_fun_def
huffman@40621
  1109
  expand_fun_less      ~> fun_below_iff
huffman@40621
  1110
  less_fun_ext         ~> fun_belowI
huffman@40621
  1111
  less_discr_def       ~> below_discr_def
huffman@40621
  1112
  discr_less_eq        ~> discr_below_eq
huffman@40621
  1113
  less_unit_def        ~> below_unit_def
huffman@40621
  1114
  less_cprod_def       ~> below_prod_def
huffman@40621
  1115
  prod_lessI           ~> prod_belowI
huffman@40621
  1116
  Pair_less_iff        ~> Pair_below_iff
huffman@40621
  1117
  fst_less_iff         ~> fst_below_iff
huffman@40621
  1118
  snd_less_iff         ~> snd_below_iff
huffman@40621
  1119
  expand_cfun_less     ~> cfun_below_iff
huffman@40621
  1120
  less_cfun_ext        ~> cfun_belowI
huffman@40621
  1121
  injection_less       ~> injection_below
huffman@40621
  1122
  less_up_def          ~> below_up_def
huffman@40621
  1123
  not_Iup_less         ~> not_Iup_below
huffman@40621
  1124
  Iup_less             ~> Iup_below
huffman@40621
  1125
  up_less              ~> up_below
huffman@40621
  1126
  Def_inject_less_eq   ~> Def_below_Def
huffman@40621
  1127
  Def_less_is_eq       ~> Def_below_iff
huffman@40621
  1128
  spair_less_iff       ~> spair_below_iff
huffman@40621
  1129
  less_sprod           ~> below_sprod
huffman@40621
  1130
  spair_less           ~> spair_below
huffman@40621
  1131
  sfst_less_iff        ~> sfst_below_iff
huffman@40621
  1132
  ssnd_less_iff        ~> ssnd_below_iff
huffman@40621
  1133
  fix_least_less       ~> fix_least_below
huffman@40621
  1134
  dist_less_one        ~> dist_below_one
huffman@40621
  1135
  less_ONE             ~> below_ONE
huffman@40621
  1136
  ONE_less_iff         ~> ONE_below_iff
huffman@40621
  1137
  less_sinlD           ~> below_sinlD
huffman@40621
  1138
  less_sinrD           ~> below_sinrD
huffman@40621
  1139
huffman@40621
  1140
wenzelm@40948
  1141
*** FOL and ZF ***
haftmann@38522
  1142
wenzelm@41310
  1143
* All constant names are now qualified internally and use proper
wenzelm@41310
  1144
identifiers, e.g. "IFOL.eq" instead of "op =".  INCOMPATIBILITY.
wenzelm@41310
  1145
haftmann@38522
  1146
wenzelm@37868
  1147
*** ML ***
wenzelm@37868
  1148
wenzelm@41594
  1149
* Antiquotation @{assert} inlines a function bool -> unit that raises
wenzelm@41594
  1150
Fail if the argument is false.  Due to inlining the source position of
wenzelm@41594
  1151
failed assertions is included in the error output.
wenzelm@41594
  1152
wenzelm@41594
  1153
* Discontinued antiquotation @{theory_ref}, which is obsolete since ML
wenzelm@41594
  1154
text is in practice always evaluated with a stable theory checkpoint.
wenzelm@41594
  1155
Minor INCOMPATIBILITY, use (Theory.check_thy @{theory}) instead.
wenzelm@41594
  1156
wenzelm@41594
  1157
* Antiquotation @{theory A} refers to theory A from the ancestry of
wenzelm@41594
  1158
the current context, not any accidental theory loader state as before.
wenzelm@41594
  1159
Potential INCOMPATIBILITY, subtle change in semantics.
wenzelm@41228
  1160
wenzelm@40956
  1161
* Syntax.pretty_priority (default 0) configures the required priority
wenzelm@40956
  1162
of pretty-printed output and thus affects insertion of parentheses.
wenzelm@40956
  1163
wenzelm@40959
  1164
* Syntax.default_root (default "any") configures the inner syntax
wenzelm@40959
  1165
category (nonterminal symbol) for parsing of terms.
wenzelm@40959
  1166
wenzelm@40722
  1167
* Former exception Library.UnequalLengths now coincides with
wenzelm@40722
  1168
ListPair.UnequalLengths.
wenzelm@40722
  1169
wenzelm@41594
  1170
* Renamed structure MetaSimplifier to Raw_Simplifier.  Note that the
wenzelm@41594
  1171
main functionality is provided by structure Simplifier.
wenzelm@41594
  1172
wenzelm@40627
  1173
* Renamed raw "explode" function to "raw_explode" to emphasize its
wenzelm@40627
  1174
meaning.  Note that internally to Isabelle, Symbol.explode is used in
wenzelm@40627
  1175
almost all situations.
wenzelm@40627
  1176
wenzelm@40318
  1177
* Discontinued obsolete function sys_error and exception SYS_ERROR.
wenzelm@40318
  1178
See implementation manual for further details on exceptions in
wenzelm@40318
  1179
Isabelle/ML.
wenzelm@40318
  1180
wenzelm@39616
  1181
* Renamed setmp_noncritical to Unsynchronized.setmp to emphasize its
wenzelm@39616
  1182
meaning.
wenzelm@39616
  1183
wenzelm@39557
  1184
* Renamed structure PureThy to Pure_Thy and moved most of its
wenzelm@39557
  1185
operations to structure Global_Theory, to emphasize that this is
wenzelm@39557
  1186
rarely-used global-only stuff.
wenzelm@39557
  1187
wenzelm@39513
  1188
* Discontinued Output.debug.  Minor INCOMPATIBILITY, use plain writeln
wenzelm@39513
  1189
instead (or tracing for high-volume output).
wenzelm@39513
  1190
wenzelm@38980
  1191
* Configuration option show_question_marks only affects regular pretty
wenzelm@38980
  1192
printing of types and terms, not raw Term.string_of_vname.
wenzelm@38980
  1193
wenzelm@39164
  1194
* ML_Context.thm and ML_Context.thms are no longer pervasive.  Rare
wenzelm@39164
  1195
INCOMPATIBILITY, superseded by static antiquotations @{thm} and
wenzelm@39164
  1196
@{thms} for most purposes.
wenzelm@39164
  1197
wenzelm@41594
  1198
* ML structure Unsynchronized is never opened, not even in Isar
wenzelm@38980
  1199
interaction mode as before.  Old Unsynchronized.set etc. have been
wenzelm@38980
  1200
discontinued -- use plain := instead.  This should be *rare* anyway,
wenzelm@38980
  1201
since modern tools always work via official context data, notably
wenzelm@38980
  1202
configuration options.
wenzelm@38980
  1203
wenzelm@39239
  1204
* Parallel and asynchronous execution requires special care concerning
wenzelm@39239
  1205
interrupts.  Structure Exn provides some convenience functions that
wenzelm@39239
  1206
avoid working directly with raw Interrupt.  User code must not absorb
wenzelm@39239
  1207
interrupts -- intermediate handling (for cleanup etc.) needs to be
wenzelm@39239
  1208
followed by re-raising of the original exception.  Another common
wenzelm@39239
  1209
source of mistakes are "handle _" patterns, which make the meaning of
wenzelm@39239
  1210
the program subject to physical effects of the environment.
wenzelm@39239
  1211
wenzelm@37868
  1212
wenzelm@37868
  1213
wenzelm@37144
  1214
New in Isabelle2009-2 (June 2010)
wenzelm@37144
  1215
---------------------------------
haftmann@33993
  1216
wenzelm@35260
  1217
*** General ***
wenzelm@35260
  1218
wenzelm@35436
  1219
* Authentic syntax for *all* logical entities (type classes, type
wenzelm@35436
  1220
constructors, term constants): provides simple and robust
wenzelm@35436
  1221
correspondence between formal entities and concrete syntax.  Within
wenzelm@35436
  1222
the parse tree / AST representations, "constants" are decorated by
wenzelm@35436
  1223
their category (class, type, const) and spelled out explicitly with
wenzelm@35436
  1224
their full internal name.
wenzelm@35436
  1225
wenzelm@35436
  1226
Substantial INCOMPATIBILITY concerning low-level syntax declarations
wenzelm@35436
  1227
and translations (translation rules and translation functions in ML).
wenzelm@35436
  1228
Some hints on upgrading:
wenzelm@35260
  1229
wenzelm@35260
  1230
  - Many existing uses of 'syntax' and 'translations' can be replaced
wenzelm@35436
  1231
    by more modern 'type_notation', 'notation' and 'abbreviation',
wenzelm@35436
  1232
    which are independent of this issue.
wenzelm@35260
  1233
wenzelm@35260
  1234
  - 'translations' require markup within the AST; the term syntax
wenzelm@35260
  1235
    provides the following special forms:
wenzelm@35260
  1236
wenzelm@35260
  1237
      CONST c   -- produces syntax version of constant c from context
wenzelm@35261
  1238
      XCONST c  -- literally c, checked as constant from context
wenzelm@35261
  1239
      c         -- literally c, if declared by 'syntax'
wenzelm@35261
  1240
wenzelm@35261
  1241
    Plain identifiers are treated as AST variables -- occasionally the
wenzelm@35261
  1242
    system indicates accidental variables via the error "rhs contains
wenzelm@35261
  1243
    extra variables".
wenzelm@35260
  1244
wenzelm@35436
  1245
    Type classes and type constructors are marked according to their
wenzelm@35436
  1246
    concrete syntax.  Some old translations rules need to be written
wenzelm@35436
  1247
    for the "type" category, using type constructor application
wenzelm@35436
  1248
    instead of pseudo-term application of the default category
wenzelm@35436
  1249
    "logic".
wenzelm@35436
  1250
wenzelm@35260
  1251
  - 'parse_translation' etc. in ML may use the following
wenzelm@35260
  1252
    antiquotations:
wenzelm@35260
  1253
wenzelm@35436
  1254
      @{class_syntax c}   -- type class c within parse tree / AST
wenzelm@35436
  1255
      @{term_syntax c}    -- type constructor c within parse tree / AST
wenzelm@35260
  1256
      @{const_syntax c}   -- ML version of "CONST c" above
wenzelm@35260
  1257
      @{syntax_const c}   -- literally c (checked wrt. 'syntax' declarations)
wenzelm@35260
  1258
wenzelm@35436
  1259
  - Literal types within 'typed_print_translations', i.e. those *not*
wenzelm@35436
  1260
    represented as pseudo-terms are represented verbatim.  Use @{class
wenzelm@35436
  1261
    c} or @{type_name c} here instead of the above syntax
wenzelm@35436
  1262
    antiquotations.
wenzelm@35436
  1263
wenzelm@35260
  1264
Note that old non-authentic syntax was based on unqualified base
wenzelm@35436
  1265
names, so all of the above "constant" names would coincide.  Recall
wenzelm@35436
  1266
that 'print_syntax' and ML_command "set Syntax.trace_ast" help to
wenzelm@35436
  1267
diagnose syntax problems.
wenzelm@35260
  1268
wenzelm@35351
  1269
* Type constructors admit general mixfix syntax, not just infix.
wenzelm@35351
  1270
wenzelm@36508
  1271
* Concrete syntax may be attached to local entities without a proof
wenzelm@36508
  1272
body, too.  This works via regular mixfix annotations for 'fix',
wenzelm@36508
  1273
'def', 'obtain' etc. or via the explicit 'write' command, which is
wenzelm@36508
  1274
similar to the 'notation' command in theory specifications.
wenzelm@36508
  1275
wenzelm@37351
  1276
* Discontinued unnamed infix syntax (legacy feature for many years) --
wenzelm@37351
  1277
need to specify constant name and syntax separately.  Internal ML
wenzelm@37351
  1278
datatype constructors have been renamed from InfixName to Infix etc.
wenzelm@37351
  1279
Minor INCOMPATIBILITY.
wenzelm@37351
  1280
wenzelm@37351
  1281
* Schematic theorem statements need to be explicitly markup as such,
wenzelm@37351
  1282
via commands 'schematic_lemma', 'schematic_theorem',
wenzelm@37351
  1283
'schematic_corollary'.  Thus the relevance of the proof is made
wenzelm@37351
  1284
syntactically clear, which impacts performance in a parallel or
wenzelm@37351
  1285
asynchronous interactive environment.  Minor INCOMPATIBILITY.
wenzelm@37351
  1286
wenzelm@35613
  1287
* Use of cumulative prems via "!" in some proof methods has been
wenzelm@37351
  1288
discontinued (old legacy feature).
wenzelm@35613
  1289
boehmes@35979
  1290
* References 'trace_simp' and 'debug_simp' have been replaced by
wenzelm@36857
  1291
configuration options stored in the context. Enabling tracing (the
wenzelm@36857
  1292
case of debugging is similar) in proofs works via
wenzelm@36857
  1293
wenzelm@36857
  1294
  using [[trace_simp = true]]
wenzelm@36857
  1295
wenzelm@36857
  1296
Tracing is then active for all invocations of the simplifier in
wenzelm@36857
  1297
subsequent goal refinement steps. Tracing may also still be enabled or
wenzelm@40780
  1298
disabled via the ProofGeneral settings menu.
boehmes@35979
  1299
wenzelm@36177
  1300
* Separate commands 'hide_class', 'hide_type', 'hide_const',
wenzelm@36177
  1301
'hide_fact' replace the former 'hide' KIND command.  Minor
wenzelm@36177
  1302
INCOMPATIBILITY.
wenzelm@36177
  1303
wenzelm@37298
  1304
* Improved parallelism of proof term normalization: usedir -p2 -q0 is
wenzelm@37298
  1305
more efficient than combinations with -q1 or -q2.
wenzelm@37298
  1306
wenzelm@35260
  1307
haftmann@34170
  1308
*** Pure ***
haftmann@34170
  1309
wenzelm@37351
  1310
* Proofterms record type-class reasoning explicitly, using the
wenzelm@37351
  1311
"unconstrain" operation internally.  This eliminates all sort
wenzelm@37351
  1312
constraints from a theorem and proof, introducing explicit
wenzelm@37351
  1313
OFCLASS-premises.  On the proof term level, this operation is
wenzelm@37351
  1314
automatically applied at theorem boundaries, such that closed proofs
wenzelm@37351
  1315
are always free of sort constraints.  INCOMPATIBILITY for tools that
wenzelm@37351
  1316
inspect proof terms.
haftmann@36147
  1317
wenzelm@35765
  1318
* Local theory specifications may depend on extra type variables that
wenzelm@35765
  1319
are not present in the result type -- arguments TYPE('a) :: 'a itself
wenzelm@35765
  1320
are added internally.  For example:
wenzelm@35765
  1321
wenzelm@35765
  1322
  definition unitary :: bool where "unitary = (ALL (x::'a) y. x = y)"
wenzelm@35765
  1323
wenzelm@37351
  1324
* Predicates of locales introduced by classes carry a mandatory
wenzelm@37351
  1325
"class" prefix.  INCOMPATIBILITY.
wenzelm@37351
  1326
wenzelm@37351
  1327
* Vacuous class specifications observe default sort.  INCOMPATIBILITY.
wenzelm@37351
  1328
wenzelm@37351
  1329
* Old 'axclass' command has been discontinued.  INCOMPATIBILITY, use
wenzelm@37351
  1330
'class' instead.
wenzelm@37351
  1331
wenzelm@37351
  1332
* Command 'code_reflect' allows to incorporate generated ML code into
wenzelm@37351
  1333
runtime environment; replaces immature code_datatype antiquotation.
wenzelm@37351
  1334
INCOMPATIBILITY.
wenzelm@37351
  1335
wenzelm@37351
  1336
* Code generator: simple concept for abstract datatypes obeying
wenzelm@37351
  1337
invariants.
wenzelm@37351
  1338
wenzelm@36857
  1339
* Code generator: details of internal data cache have no impact on the
wenzelm@36857
  1340
user space functionality any longer.
wenzelm@36857
  1341
wenzelm@37351
  1342
* Methods "unfold_locales" and "intro_locales" ignore non-locale
wenzelm@37351
  1343
subgoals.  This is more appropriate for interpretations with 'where'.
wenzelm@36857
  1344
INCOMPATIBILITY.
haftmann@34170
  1345
wenzelm@36356
  1346
* Command 'example_proof' opens an empty proof body.  This allows to
wenzelm@36356
  1347
experiment with Isar, without producing any persistent result.
wenzelm@36356
  1348
wenzelm@35413
  1349
* Commands 'type_notation' and 'no_type_notation' declare type syntax
wenzelm@35413
  1350
within a local theory context, with explicit checking of the
wenzelm@35413
  1351
constructors involved (in contrast to the raw 'syntax' versions).
wenzelm@35413
  1352
wenzelm@36178
  1353
* Commands 'types' and 'typedecl' now work within a local theory
wenzelm@36178
  1354
context -- without introducing dependencies on parameters or
wenzelm@36178
  1355
assumptions, which is not possible in Isabelle/Pure.
wenzelm@35681
  1356
wenzelm@36857
  1357
* Command 'defaultsort' has been renamed to 'default_sort', it works
wenzelm@36857
  1358
within a local theory context.  Minor INCOMPATIBILITY.
wenzelm@36454
  1359
haftmann@34170
  1360
haftmann@33993
  1361
*** HOL ***
haftmann@33993
  1362
wenzelm@37351
  1363
* Command 'typedef' now works within a local theory context -- without
wenzelm@37351
  1364
introducing dependencies on parameters or assumptions, which is not
wenzelm@37351
  1365
possible in Isabelle/Pure/HOL.  Note that the logical environment may
wenzelm@37351
  1366
contain multiple interpretations of local typedefs (with different
wenzelm@37351
  1367
non-emptiness proofs), even in a global theory context.
wenzelm@37351
  1368
wenzelm@37351
  1369
* New package for quotient types.  Commands 'quotient_type' and
wenzelm@37351
  1370
'quotient_definition' may be used for defining types and constants by
wenzelm@37351
  1371
quotient constructions.  An example is the type of integers created by
wenzelm@37351
  1372
quotienting pairs of natural numbers:
wenzelm@37380
  1373
wenzelm@37351
  1374
  fun
wenzelm@37380
  1375
    intrel :: "(nat * nat) => (nat * nat) => bool"
wenzelm@37351
  1376
  where
wenzelm@37351
  1377
    "intrel (x, y) (u, v) = (x + v = u + y)"
wenzelm@37351
  1378
wenzelm@37380
  1379
  quotient_type int = "nat * nat" / intrel
wenzelm@37351
  1380
    by (auto simp add: equivp_def expand_fun_eq)
wenzelm@37380
  1381
wenzelm@37351
  1382
  quotient_definition
wenzelm@37351
  1383
    "0::int" is "(0::nat, 0::nat)"
wenzelm@37351
  1384
wenzelm@37351
  1385
The method "lifting" can be used to lift of theorems from the
wenzelm@37351
  1386
underlying "raw" type to the quotient type.  The example
wenzelm@37351
  1387
src/HOL/Quotient_Examples/FSet.thy includes such a quotient
wenzelm@37351
  1388
construction and provides a reasoning infrastructure for finite sets.
wenzelm@37351
  1389
wenzelm@37351
  1390
* Renamed Library/Quotient.thy to Library/Quotient_Type.thy to avoid
wenzelm@37351
  1391
clash with new theory Quotient in Main HOL.
wenzelm@37351
  1392
wenzelm@37351
  1393
* Moved the SMT binding into the main HOL session, eliminating
wenzelm@37351
  1394
separate HOL-SMT session.
wenzelm@37351
  1395
haftmann@37020
  1396
* List membership infix mem operation is only an input abbreviation.
haftmann@37020
  1397
INCOMPATIBILITY.
haftmann@37020
  1398
wenzelm@37144
  1399
* Theory Library/Word.thy has been removed.  Use library Word/Word.thy
wenzelm@37144
  1400
for future developements; former Library/Word.thy is still present in
wenzelm@37144
  1401
the AFP entry RSAPPS.
haftmann@36963
  1402
wenzelm@36857
  1403
* Theorem Int.int_induct renamed to Int.int_of_nat_induct and is no
wenzelm@36857
  1404
longer shadowed.  INCOMPATIBILITY.
haftmann@36808
  1405
huffman@36836
  1406
* Dropped theorem duplicate comp_arith; use semiring_norm instead.
huffman@36836
  1407
INCOMPATIBILITY.
huffman@36836
  1408
huffman@36836
  1409
* Dropped theorem RealPow.real_sq_order; use power2_le_imp_le instead.
huffman@36836
  1410
INCOMPATIBILITY.
haftmann@36714
  1411
wenzelm@36857
  1412
* Dropped normalizing_semiring etc; use the facts in semiring classes
wenzelm@36857
  1413
instead.  INCOMPATIBILITY.
wenzelm@36857
  1414
huffman@36979
  1415
* Dropped several real-specific versions of lemmas about floor and
wenzelm@37351
  1416
ceiling; use the generic lemmas from theory "Archimedean_Field"
wenzelm@37351
  1417
instead.  INCOMPATIBILITY.
huffman@36979
  1418
huffman@36979
  1419
  floor_number_of_eq         ~> floor_number_of
huffman@36979
  1420
  le_floor_eq_number_of      ~> number_of_le_floor
huffman@36979
  1421
  le_floor_eq_zero           ~> zero_le_floor
huffman@36979
  1422
  le_floor_eq_one            ~> one_le_floor
huffman@36979
  1423
  floor_less_eq_number_of    ~> floor_less_number_of
huffman@36979
  1424
  floor_less_eq_zero         ~> floor_less_zero
huffman@36979
  1425
  floor_less_eq_one          ~> floor_less_one
huffman@36979
  1426
  less_floor_eq_number_of    ~> number_of_less_floor
huffman@36979
  1427
  less_floor_eq_zero         ~> zero_less_floor
huffman@36979
  1428
  less_floor_eq_one          ~> one_less_floor
huffman@36979
  1429
  floor_le_eq_number_of      ~> floor_le_number_of
huffman@36979
  1430
  floor_le_eq_zero           ~> floor_le_zero
huffman@36979
  1431
  floor_le_eq_one            ~> floor_le_one
huffman@36979
  1432
  floor_subtract_number_of   ~> floor_diff_number_of
huffman@36979
  1433
  floor_subtract_one         ~> floor_diff_one
huffman@36979
  1434
  ceiling_number_of_eq       ~> ceiling_number_of
huffman@36979
  1435
  ceiling_le_eq_number_of    ~> ceiling_le_number_of
huffman@36979
  1436
  ceiling_le_zero_eq         ~> ceiling_le_zero
huffman@36979
  1437
  ceiling_le_eq_one          ~> ceiling_le_one
huffman@36979
  1438
  less_ceiling_eq_number_of  ~> number_of_less_ceiling
huffman@36979
  1439
  less_ceiling_eq_zero       ~> zero_less_ceiling
huffman@36979
  1440
  less_ceiling_eq_one        ~> one_less_ceiling
huffman@36979
  1441
  ceiling_less_eq_number_of  ~> ceiling_less_number_of
huffman@36979
  1442
  ceiling_less_eq_zero       ~> ceiling_less_zero
huffman@36979
  1443
  ceiling_less_eq_one        ~> ceiling_less_one
huffman@36979
  1444
  le_ceiling_eq_number_of    ~> number_of_le_ceiling
huffman@36979
  1445
  le_ceiling_eq_zero         ~> zero_le_ceiling
huffman@36979
  1446
  le_ceiling_eq_one          ~> one_le_ceiling
huffman@36979
  1447
  ceiling_subtract_number_of ~> ceiling_diff_number_of
huffman@36979
  1448
  ceiling_subtract_one       ~> ceiling_diff_one
huffman@36979
  1449
wenzelm@37144
  1450
* Theory "Finite_Set": various folding_XXX locales facilitate the
wenzelm@36857
  1451
application of the various fold combinators on finite sets.
wenzelm@36857
  1452
wenzelm@36857
  1453
* Library theory "RBT" renamed to "RBT_Impl"; new library theory "RBT"
wenzelm@36857
  1454
provides abstract red-black tree type which is backed by "RBT_Impl" as
wenzelm@36857
  1455
implementation.  INCOMPATIBILTY.
haftmann@36147
  1456
huffman@36830
  1457
* Theory Library/Coinductive_List has been removed -- superseded by
wenzelm@35763
  1458
AFP/thys/Coinductive.
wenzelm@35763
  1459
huffman@36829
  1460
* Theory PReal, including the type "preal" and related operations, has
huffman@36829
  1461
been removed.  INCOMPATIBILITY.
huffman@36829
  1462
wenzelm@37380
  1463
* Real: new development using Cauchy Sequences.
wenzelm@37380
  1464
wenzelm@37351
  1465
* Split off theory "Big_Operators" containing setsum, setprod,
wenzelm@37351
  1466
Inf_fin, Sup_fin, Min, Max from theory Finite_Set.  INCOMPATIBILITY.
wenzelm@36857
  1467
wenzelm@36857
  1468
* Theory "Rational" renamed to "Rat", for consistency with "Nat",
wenzelm@36857
  1469
"Int" etc.  INCOMPATIBILITY.
wenzelm@36857
  1470
wenzelm@37351
  1471
* Constant Rat.normalize needs to be qualified.  INCOMPATIBILITY.
wenzelm@37143
  1472
wenzelm@36857
  1473
* New set of rules "ac_simps" provides combined assoc / commute
wenzelm@36857
  1474
rewrites for all interpretations of the appropriate generic locales.
wenzelm@36857
  1475
wenzelm@36857
  1476
* Renamed theory "OrderedGroup" to "Groups" and split theory
wenzelm@36857
  1477
"Ring_and_Field" into theories "Rings" and "Fields"; for more
wenzelm@36857
  1478
appropriate and more consistent names suitable for name prefixes
wenzelm@36857
  1479
within the HOL theories.  INCOMPATIBILITY.
haftmann@35050
  1480
haftmann@35084
  1481
* Some generic constants have been put to appropriate theories:
wenzelm@36857
  1482
  - less_eq, less: Orderings
wenzelm@36857
  1483
  - zero, one, plus, minus, uminus, times, abs, sgn: Groups
wenzelm@36857
  1484
  - inverse, divide: Rings
haftmann@35084
  1485
INCOMPATIBILITY.
haftmann@35084
  1486
wenzelm@36857
  1487
* More consistent naming of type classes involving orderings (and
wenzelm@36857
  1488
lattices):
haftmann@35027
  1489
haftmann@35027
  1490
    lower_semilattice                   ~> semilattice_inf
haftmann@35027
  1491
    upper_semilattice                   ~> semilattice_sup
haftmann@35027
  1492
haftmann@35027
  1493
    dense_linear_order                  ~> dense_linorder
haftmann@35027
  1494
haftmann@35027
  1495
    pordered_ab_group_add               ~> ordered_ab_group_add
haftmann@35027
  1496
    pordered_ab_group_add_abs           ~> ordered_ab_group_add_abs
haftmann@35027
  1497
    pordered_ab_semigroup_add           ~> ordered_ab_semigroup_add
haftmann@35027
  1498
    pordered_ab_semigroup_add_imp_le    ~> ordered_ab_semigroup_add_imp_le
haftmann@35027
  1499
    pordered_cancel_ab_semigroup_add    ~> ordered_cancel_ab_semigroup_add
haftmann@35027
  1500
    pordered_cancel_comm_semiring       ~> ordered_cancel_comm_semiring
haftmann@35027
  1501
    pordered_cancel_semiring            ~> ordered_cancel_semiring
haftmann@35027
  1502
    pordered_comm_monoid_add            ~> ordered_comm_monoid_add
haftmann@35027
  1503
    pordered_comm_ring                  ~> ordered_comm_ring
haftmann@35027
  1504
    pordered_comm_semiring              ~> ordered_comm_semiring
haftmann@35027
  1505
    pordered_ring                       ~> ordered_ring
haftmann@35027
  1506
    pordered_ring_abs                   ~> ordered_ring_abs
haftmann@35027
  1507
    pordered_semiring                   ~> ordered_semiring
haftmann@35027
  1508
haftmann@35027
  1509
    ordered_ab_group_add                ~> linordered_ab_group_add
haftmann@35027
  1510
    ordered_ab_semigroup_add            ~> linordered_ab_semigroup_add
haftmann@35027
  1511
    ordered_cancel_ab_semigroup_add     ~> linordered_cancel_ab_semigroup_add
haftmann@35027
  1512
    ordered_comm_semiring_strict        ~> linordered_comm_semiring_strict
haftmann@35027
  1513
    ordered_field                       ~> linordered_field
haftmann@35027
  1514
    ordered_field_no_lb                 ~> linordered_field_no_lb
haftmann@35027
  1515
    ordered_field_no_ub                 ~> linordered_field_no_ub
haftmann@35027
  1516
    ordered_field_dense_linear_order    ~> dense_linordered_field
haftmann@35027
  1517
    ordered_idom                        ~> linordered_idom
haftmann@35027
  1518
    ordered_ring                        ~> linordered_ring
haftmann@35027
  1519
    ordered_ring_le_cancel_factor       ~> linordered_ring_le_cancel_factor
haftmann@35027
  1520
    ordered_ring_less_cancel_factor     ~> linordered_ring_less_cancel_factor
haftmann@35027
  1521
    ordered_ring_strict                 ~> linordered_ring_strict
haftmann@35027
  1522
    ordered_semidom                     ~> linordered_semidom
haftmann@35027
  1523
    ordered_semiring                    ~> linordered_semiring
haftmann@35027
  1524
    ordered_semiring_1                  ~> linordered_semiring_1
haftmann@35027
  1525
    ordered_semiring_1_strict           ~> linordered_semiring_1_strict
haftmann@35027
  1526
    ordered_semiring_strict             ~> linordered_semiring_strict
haftmann@35027
  1527
wenzelm@36857
  1528
  The following slightly odd type classes have been moved to a
wenzelm@37351
  1529
  separate theory Library/Lattice_Algebras:
haftmann@35032
  1530
haftmann@35032
  1531
    lordered_ab_group_add               ~> lattice_ab_group_add
haftmann@35032
  1532
    lordered_ab_group_add_abs           ~> lattice_ab_group_add_abs
haftmann@35032
  1533
    lordered_ab_group_add_meet          ~> semilattice_inf_ab_group_add
haftmann@35032
  1534
    lordered_ab_group_add_join          ~> semilattice_sup_ab_group_add
haftmann@35032
  1535
    lordered_ring                       ~> lattice_ring
haftmann@35032
  1536
haftmann@35027
  1537
INCOMPATIBILITY.
haftmann@35027
  1538
haftmann@36416
  1539
* Refined field classes:
wenzelm@36857
  1540
  - classes division_ring_inverse_zero, field_inverse_zero,
wenzelm@36857
  1541
    linordered_field_inverse_zero include rule inverse 0 = 0 --
wenzelm@36857
  1542
    subsumes former division_by_zero class;
wenzelm@36857
  1543
  - numerous lemmas have been ported from field to division_ring.
wenzelm@36857
  1544
INCOMPATIBILITY.
haftmann@36416
  1545
haftmann@36416
  1546
* Refined algebra theorem collections:
wenzelm@36857
  1547
  - dropped theorem group group_simps, use algebra_simps instead;
wenzelm@36857
  1548
  - dropped theorem group ring_simps, use field_simps instead;
wenzelm@36857
  1549
  - proper theorem collection field_simps subsumes former theorem
wenzelm@36857
  1550
    groups field_eq_simps and field_simps;
wenzelm@36857
  1551
  - dropped lemma eq_minus_self_iff which is a duplicate for
wenzelm@36857
  1552
    equal_neg_zero.
wenzelm@36857
  1553
INCOMPATIBILITY.
wenzelm@35009
  1554
wenzelm@35009
  1555
* Theory Finite_Set and List: some lemmas have been generalized from
wenzelm@34076
  1556
sets to lattices:
wenzelm@34076
  1557
haftmann@34007
  1558
  fun_left_comm_idem_inter      ~> fun_left_comm_idem_inf
haftmann@34007
  1559
  fun_left_comm_idem_union      ~> fun_left_comm_idem_sup
haftmann@34007
  1560
  inter_Inter_fold_inter        ~> inf_Inf_fold_inf
haftmann@34007
  1561
  union_Union_fold_union        ~> sup_Sup_fold_sup
haftmann@34007
  1562
  Inter_fold_inter              ~> Inf_fold_inf
haftmann@34007
  1563
  Union_fold_union              ~> Sup_fold_sup
haftmann@34007
  1564
  inter_INTER_fold_inter        ~> inf_INFI_fold_inf
haftmann@34007
  1565
  union_UNION_fold_union        ~> sup_SUPR_fold_sup
haftmann@34007
  1566
  INTER_fold_inter              ~> INFI_fold_inf
haftmann@34007
  1567
  UNION_fold_union              ~> SUPR_fold_sup
haftmann@34007
  1568
wenzelm@37351
  1569
* Theory "Complete_Lattice": lemmas top_def and bot_def have been
haftmann@36416
  1570
replaced by the more convenient lemmas Inf_empty and Sup_empty.
haftmann@36416
  1571
Dropped lemmas Inf_insert_simp and Sup_insert_simp, which are subsumed
haftmann@36416
  1572
by Inf_insert and Sup_insert.  Lemmas Inf_UNIV and Sup_UNIV replace
haftmann@36416
  1573
former Inf_Univ and Sup_Univ.  Lemmas inf_top_right and sup_bot_right
haftmann@36416
  1574
subsume inf_top and sup_bot respectively.  INCOMPATIBILITY.
haftmann@36416
  1575
wenzelm@36857
  1576
* Reorganized theory Multiset: swapped notation of pointwise and
wenzelm@36857
  1577
multiset order:
wenzelm@37351
  1578
wenzelm@36857
  1579
  - pointwise ordering is instance of class order with standard syntax
wenzelm@36857
  1580
    <= and <;
wenzelm@36857
  1581
  - multiset ordering has syntax <=# and <#; partial order properties
wenzelm@36857
  1582
    are provided by means of interpretation with prefix
wenzelm@36857
  1583
    multiset_order;
wenzelm@36857
  1584
  - less duplication, less historical organization of sections,
wenzelm@36857
  1585
    conversion from associations lists to multisets, rudimentary code
wenzelm@36857
  1586
    generation;
wenzelm@36857
  1587
  - use insert_DiffM2 [symmetric] instead of elem_imp_eq_diff_union,
wenzelm@36857
  1588
    if needed.
wenzelm@37351
  1589
nipkow@36903
  1590
Renamed:
wenzelm@37351
  1591
wenzelm@37351
  1592
  multiset_eq_conv_count_eq  ~>  multiset_ext_iff
wenzelm@37351
  1593
  multi_count_ext  ~>  multiset_ext
wenzelm@37351
  1594
  diff_union_inverse2  ~>  diff_union_cancelR
wenzelm@37351
  1595
wenzelm@36857
  1596
INCOMPATIBILITY.
haftmann@36416
  1597
nipkow@36903
  1598
* Theory Permutation: replaced local "remove" by List.remove1.
nipkow@36903
  1599
haftmann@36416
  1600
* Code generation: ML and OCaml code is decorated with signatures.
haftmann@36416
  1601
wenzelm@35009
  1602
* Theory List: added transpose.
wenzelm@35009
  1603
huffman@35810
  1604
* Library/Nat_Bijection.thy is a collection of bijective functions
huffman@35810
  1605
between nat and other types, which supersedes the older libraries
huffman@35810
  1606
Library/Nat_Int_Bij.thy and HOLCF/NatIso.thy.  INCOMPATIBILITY.
huffman@35810
  1607
huffman@35810
  1608
  Constants:
huffman@35810
  1609
  Nat_Int_Bij.nat2_to_nat         ~> prod_encode
huffman@35810
  1610
  Nat_Int_Bij.nat_to_nat2         ~> prod_decode
huffman@35810
  1611
  Nat_Int_Bij.int_to_nat_bij      ~> int_encode
huffman@35810
  1612
  Nat_Int_Bij.nat_to_int_bij      ~> int_decode
huffman@35810
  1613
  Countable.pair_encode           ~> prod_encode
huffman@35810
  1614
  NatIso.prod2nat                 ~> prod_encode
huffman@35810
  1615
  NatIso.nat2prod                 ~> prod_decode
huffman@35810
  1616
  NatIso.sum2nat                  ~> sum_encode
huffman@35810
  1617
  NatIso.nat2sum                  ~> sum_decode
huffman@35810
  1618
  NatIso.list2nat                 ~> list_encode
huffman@35810
  1619
  NatIso.nat2list                 ~> list_decode
huffman@35810
  1620
  NatIso.set2nat                  ~> set_encode
huffman@35810
  1621
  NatIso.nat2set                  ~> set_decode
huffman@35810
  1622
huffman@35810
  1623
  Lemmas:
huffman@35810
  1624
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_decode
huffman@35810
  1625
  Nat_Int_Bij.nat2_to_nat_inj     ~> inj_prod_encode
huffman@35810
  1626
  Nat_Int_Bij.nat2_to_nat_surj    ~> surj_prod_encode
huffman@35810
  1627
  Nat_Int_Bij.nat_to_nat2_inj     ~> inj_prod_decode
huffman@35810
  1628
  Nat_Int_Bij.nat_to_nat2_surj    ~> surj_prod_decode
huffman@35810
  1629
  Nat_Int_Bij.i2n_n2i_id          ~> int_encode_inverse
huffman@35810
  1630
  Nat_Int_Bij.n2i_i2n_id          ~> int_decode_inverse
huffman@35810
  1631
  Nat_Int_Bij.surj_nat_to_int_bij ~> surj_int_encode
huffman@35810
  1632
  Nat_Int_Bij.surj_int_to_nat_bij ~> surj_int_decode
huffman@35810
  1633
  Nat_Int_Bij.inj_nat_to_int_bij  ~> inj_int_encode
huffman@35810
  1634
  Nat_Int_Bij.inj_int_to_nat_bij  ~> inj_int_decode
huffman@35810
  1635
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_encode
huffman@35810
  1636
  Nat_Int_Bij.bij_int_to_nat_bij  ~> bij_int_decode
huffman@35810
  1637
blanchet@36929
  1638
* Sledgehammer:
blanchet@36929
  1639
  - Renamed ATP commands:
blanchet@36929
  1640
    atp_info     ~> sledgehammer running_atps
blanchet@36929
  1641
    atp_kill     ~> sledgehammer kill_atps
blanchet@36929
  1642
    atp_messages ~> sledgehammer messages
blanchet@36929
  1643
    atp_minimize ~> sledgehammer minimize
blanchet@36929
  1644
    print_atps   ~> sledgehammer available_atps
blanchet@36929
  1645
    INCOMPATIBILITY.
blanchet@36929
  1646
  - Added user's manual ("isabelle doc sledgehammer").
blanchet@36929
  1647
  - Added option syntax and "sledgehammer_params" to customize
blanchet@36929
  1648
    Sledgehammer's behavior.  See the manual for details.
blanchet@36929
  1649
  - Modified the Isar proof reconstruction code so that it produces
blanchet@36929
  1650
    direct proofs rather than proofs by contradiction.  (This feature
blanchet@36929
  1651
    is still experimental.)
blanchet@36929
  1652
  - Made Isar proof reconstruction work for SPASS, remote ATPs, and in
blanchet@36929
  1653
    full-typed mode.
blanchet@36929
  1654
  - Added support for TPTP syntax for SPASS via the "spass_tptp" ATP.
blanchet@36929
  1655
blanchet@36928
  1656
* Nitpick:
blanchet@36928
  1657
  - Added and implemented "binary_ints" and "bits" options.
blanchet@36928
  1658
  - Added "std" option and implemented support for nonstandard models.
blanchet@36928
  1659
  - Added and implemented "finitize" option to improve the precision
blanchet@36928
  1660
    of infinite datatypes based on a monotonicity analysis.
blanchet@36928
  1661
  - Added support for quotient types.
blanchet@36928
  1662
  - Added support for "specification" and "ax_specification"
blanchet@36928
  1663
    constructs.
blanchet@36928
  1664
  - Added support for local definitions (for "function" and
blanchet@36928
  1665
    "termination" proofs).
blanchet@36928
  1666
  - Added support for term postprocessors.
blanchet@36928
  1667
  - Optimized "Multiset.multiset" and "FinFun.finfun".
blanchet@36928
  1668
  - Improved efficiency of "destroy_constrs" optimization.
blanchet@36928
  1669
  - Fixed soundness bugs related to "destroy_constrs" optimization and
blanchet@36928
  1670
    record getters.
blanchet@37272
  1671
  - Fixed soundness bug related to higher-order constructors.
blanchet@37272
  1672
  - Fixed soundness bug when "full_descrs" is enabled.
blanchet@36928
  1673
  - Improved precision of set constructs.
blanchet@37260
  1674
  - Added "atoms" option.
blanchet@36928
  1675
  - Added cache to speed up repeated Kodkod invocations on the same
blanchet@36928
  1676
    problems.
blanchet@36928
  1677
  - Renamed "MiniSatJNI", "zChaffJNI", "BerkMinAlloy", and
blanchet@36928
  1678
    "SAT4JLight" to "MiniSat_JNI", "zChaff_JNI", "BerkMin_Alloy", and
blanchet@36928
  1679
    "SAT4J_Light".  INCOMPATIBILITY.
blanchet@36928
  1680
  - Removed "skolemize", "uncurry", "sym_break", "flatten_prop",
blanchet@36928
  1681
    "sharing_depth", and "show_skolems" options.  INCOMPATIBILITY.
blanchet@37264
  1682
  - Removed "nitpick_intro" attribute.  INCOMPATIBILITY.
blanchet@36928
  1683
berghofe@37361
  1684
* Method "induct" now takes instantiations of the form t, where t is not
berghofe@37361
  1685
  a variable, as a shorthand for "x == t", where x is a fresh variable.
berghofe@37361
  1686
  If this is not intended, t has to be enclosed in parentheses.
berghofe@37361
  1687
  By default, the equalities generated by definitional instantiations
berghofe@37361
  1688
  are pre-simplified, which may cause parameters of inductive cases
berghofe@37361
  1689
  to disappear, or may even delete some of the inductive cases.
berghofe@37361
  1690
  Use "induct (no_simp)" instead of "induct" to restore the old
berghofe@37361
  1691
  behaviour. The (no_simp) option is also understood by the "cases"
berghofe@37361
  1692
  and "nominal_induct" methods, which now perform pre-simplification, too.
berghofe@37361
  1693
  INCOMPATIBILITY.
berghofe@37361
  1694
haftmann@33993
  1695
huffman@36828
  1696
*** HOLCF ***
huffman@36828
  1697
huffman@36828
  1698
* Variable names in lemmas generated by the domain package have
huffman@36828
  1699
changed; the naming scheme is now consistent with the HOL datatype
huffman@36828
  1700
package.  Some proof scripts may be affected, INCOMPATIBILITY.
huffman@36828
  1701
huffman@36828
  1702
* The domain package no longer defines the function "foo_copy" for
huffman@36828
  1703
recursive domain "foo".  The reach lemma is now stated directly in
huffman@36828
  1704
terms of "foo_take".  Lemmas and proofs that mention "foo_copy" must
huffman@36828
  1705
be reformulated in terms of "foo_take", INCOMPATIBILITY.
huffman@36828
  1706
huffman@36828
  1707
* Most definedness lemmas generated by the domain package (previously
huffman@36828
  1708
of the form "x ~= UU ==> foo$x ~= UU") now have an if-and-only-if form
huffman@36828
  1709
like "foo$x = UU <-> x = UU", which works better as a simp rule.
wenzelm@37351
  1710
Proofs that used definedness lemmas as intro rules may break,
huffman@36828
  1711
potential INCOMPATIBILITY.
huffman@36828
  1712
huffman@36828
  1713
* Induction and casedist rules generated by the domain package now
huffman@36828
  1714
declare proper case_names (one called "bottom", and one named for each
huffman@36828
  1715
constructor).  INCOMPATIBILITY.
huffman@36828
  1716
huffman@36828
  1717
* For mutually-recursive domains, separate "reach" and "take_lemma"
huffman@36828
  1718
rules are generated for each domain, INCOMPATIBILITY.
huffman@36828
  1719
huffman@36828
  1720
  foo_bar.reach       ~> foo.reach  bar.reach
huffman@36828
  1721
  foo_bar.take_lemmas ~> foo.take_lemma  bar.take_lemma
huffman@36828
  1722
huffman@36828
  1723
* Some lemmas generated by the domain package have been renamed for
huffman@36828
  1724
consistency with the datatype package, INCOMPATIBILITY.
huffman@36828
  1725
huffman@36828
  1726
  foo.ind        ~> foo.induct
huffman@36828
  1727
  foo.finite_ind ~> foo.finite_induct
huffman@36828
  1728
  foo.coind      ~> foo.coinduct
huffman@36828
  1729
  foo.casedist   ~> foo.exhaust
huffman@36828
  1730
  foo.exhaust    ~> foo.nchotomy
huffman@36828
  1731
huffman@36828
  1732
* For consistency with other definition packages, the fixrec package
huffman@36828
  1733
now generates qualified theorem names, INCOMPATIBILITY.
huffman@36828
  1734
huffman@36828
  1735
  foo_simps  ~> foo.simps
huffman@36828
  1736
  foo_unfold ~> foo.unfold
huffman@36828
  1737
  foo_induct ~> foo.induct
huffman@36828
  1738
huffman@37087
  1739
* The "fixrec_simp" attribute has been removed.  The "fixrec_simp"
huffman@37087
  1740
method and internal fixrec proofs now use the default simpset instead.
huffman@37087
  1741
INCOMPATIBILITY.
huffman@37087
  1742
huffman@36828
  1743
* The "contlub" predicate has been removed.  Proof scripts should use
huffman@36828
  1744
lemma contI2 in place of monocontlub2cont, INCOMPATIBILITY.
huffman@36828
  1745
huffman@36828
  1746
* The "admw" predicate has been removed, INCOMPATIBILITY.
huffman@36828
  1747
huffman@36828
  1748
* The constants cpair, cfst, and csnd have been removed in favor of
huffman@36828
  1749
Pair, fst, and snd from Isabelle/HOL, INCOMPATIBILITY.
huffman@36828
  1750
huffman@36828
  1751
haftmann@33993
  1752
*** ML ***
haftmann@33993
  1753
wenzelm@37351
  1754
* Antiquotations for basic formal entities:
wenzelm@37351
  1755
wenzelm@37351
  1756
    @{class NAME}         -- type class
wenzelm@37351
  1757
    @{class_syntax NAME}  -- syntax representation of the above
wenzelm@37351
  1758
wenzelm@37351
  1759
    @{type_name NAME}     -- logical type
wenzelm@37351
  1760
    @{type_abbrev NAME}   -- type abbreviation
wenzelm@37351
  1761
    @{nonterminal NAME}   -- type of concrete syntactic category
wenzelm@37351
  1762
    @{type_syntax NAME}   -- syntax representation of any of the above
wenzelm@37351
  1763
wenzelm@37351
  1764
    @{const_name NAME}    -- logical constant (INCOMPATIBILITY)
wenzelm@37351
  1765
    @{const_abbrev NAME}  -- abbreviated constant
wenzelm@37351
  1766
    @{const_syntax NAME}  -- syntax representation of any of the above
wenzelm@37351
  1767
wenzelm@37351
  1768
* Antiquotation @{syntax_const NAME} ensures that NAME refers to a raw
wenzelm@37351
  1769
syntax constant (cf. 'syntax' command).
wenzelm@37351
  1770
wenzelm@37351
  1771
* Antiquotation @{make_string} inlines a function to print arbitrary
wenzelm@37351
  1772
values similar to the ML toplevel.  The result is compiler dependent
wenzelm@37351
  1773
and may fall back on "?" in certain situations.
wenzelm@37351
  1774
wenzelm@37351
  1775
* Diagnostic commands 'ML_val' and 'ML_command' may refer to
wenzelm@37351
  1776
antiquotations @{Isar.state} and @{Isar.goal}.  This replaces impure
wenzelm@37351
  1777
Isar.state() and Isar.goal(), which belong to the old TTY loop and do
wenzelm@37351
  1778
not work with the asynchronous Isar document model.
wenzelm@37351
  1779
wenzelm@37351
  1780
* Configuration options now admit dynamic default values, depending on
wenzelm@37351
  1781
the context or even global references.
wenzelm@37351
  1782
wenzelm@37351
  1783
* SHA1.digest digests strings according to SHA-1 (see RFC 3174).  It
wenzelm@37351
  1784
uses an efficient external library if available (for Poly/ML).
wenzelm@37351
  1785
wenzelm@37144
  1786
* Renamed some important ML structures, while keeping the old names
wenzelm@37144
  1787
for some time as aliases within the structure Legacy:
wenzelm@37144
  1788
wenzelm@37144
  1789
  OuterKeyword  ~>  Keyword
wenzelm@37144
  1790
  OuterLex      ~>  Token
wenzelm@37144
  1791
  OuterParse    ~>  Parse
wenzelm@37144
  1792
  OuterSyntax   ~>  Outer_Syntax
wenzelm@37216
  1793
  PrintMode     ~>  Print_Mode
wenzelm@37144
  1794
  SpecParse     ~>  Parse_Spec
wenzelm@37216
  1795
  ThyInfo       ~>  Thy_Info
wenzelm@37216
  1796
  ThyLoad       ~>  Thy_Load
wenzelm@37216
  1797
  ThyOutput     ~>  Thy_Output
wenzelm@37145
  1798
  TypeInfer     ~>  Type_Infer
wenzelm@37144
  1799
wenzelm@37144
  1800
Note that "open Legacy" simplifies porting of sources, but forgetting
wenzelm@37144
  1801
to remove it again will complicate porting again in the future.
wenzelm@37144
  1802
wenzelm@37144
  1803
* Most operations that refer to a global context are named
wenzelm@37144
  1804
accordingly, e.g. Simplifier.global_context or
wenzelm@37144
  1805
ProofContext.init_global.  There are some situations where a global
wenzelm@37144
  1806
context actually works, but under normal circumstances one needs to
wenzelm@37144
  1807
pass the proper local context through the code!
wenzelm@37144
  1808
wenzelm@37144
  1809
* Discontinued old TheoryDataFun with its copy/init operation -- data
wenzelm@37144
  1810
needs to be pure.  Functor Theory_Data_PP retains the traditional
wenzelm@37144
  1811
Pretty.pp argument to merge, which is absent in the standard
wenzelm@37144
  1812
Theory_Data version.
wenzelm@36429
  1813
wenzelm@37144
  1814
* Sorts.certify_sort and derived "cert" operations for types and terms
wenzelm@37144
  1815
no longer minimize sorts.  Thus certification at the boundary of the
wenzelm@37144
  1816
inference kernel becomes invariant under addition of class relations,
wenzelm@37144
  1817
which is an important monotonicity principle.  Sorts are now minimized
wenzelm@37144
  1818
in the syntax layer only, at the boundary between the end-user and the
wenzelm@37144
  1819
system.  Subtle INCOMPATIBILITY, may have to use Sign.minimize_sort
wenzelm@37144
  1820
explicitly in rare situations.
wenzelm@37144
  1821
wenzelm@35021
  1822
* Renamed old-style Drule.standard to Drule.export_without_context, to
wenzelm@35021
  1823
emphasize that this is in no way a standard operation.
wenzelm@35021
  1824
INCOMPATIBILITY.
wenzelm@35021
  1825
wenzelm@34076
  1826
* Subgoal.FOCUS (and variants): resulting goal state is normalized as
wenzelm@34076
  1827
usual for resolution.  Rare INCOMPATIBILITY.
wenzelm@34076
  1828
wenzelm@35845
  1829
* Renamed varify/unvarify operations to varify_global/unvarify_global
wenzelm@35845
  1830
to emphasize that these only work in a global situation (which is
wenzelm@35845
  1831
quite rare).
wenzelm@35845
  1832
wenzelm@37144
  1833
* Curried take and drop in library.ML; negative length is interpreted
wenzelm@37144
  1834
as infinity (as in chop).  Subtle INCOMPATIBILITY.
wenzelm@36961
  1835
wenzelm@37351
  1836
* Proof terms: type substitutions on proof constants now use canonical
wenzelm@37351
  1837
order of type variables.  INCOMPATIBILITY for tools working with proof
wenzelm@37351
  1838
terms.
wenzelm@37351
  1839
wenzelm@37351
  1840
* Raw axioms/defs may no longer carry sort constraints, and raw defs
wenzelm@37351
  1841
may no longer carry premises.  User-level specifications are
wenzelm@37351
  1842
transformed accordingly by Thm.add_axiom/add_def.
wenzelm@37351
  1843
haftmann@33993
  1844
wenzelm@34238
  1845
*** System ***
wenzelm@34238
  1846
wenzelm@34238
  1847
* Discontinued special HOL_USEDIR_OPTIONS for the main HOL image;
wenzelm@34238
  1848
ISABELLE_USEDIR_OPTIONS applies uniformly to all sessions.  Note that
wenzelm@34238
  1849
proof terms are enabled unconditionally in the new HOL-Proofs image.
wenzelm@34238
  1850
wenzelm@34255
  1851
* Discontinued old ISABELLE and ISATOOL environment settings (legacy
wenzelm@34255
  1852
feature since Isabelle2009).  Use ISABELLE_PROCESS and ISABELLE_TOOL,
wenzelm@34255
  1853
respectively.
wenzelm@34255
  1854
wenzelm@36201
  1855
* Old lib/scripts/polyml-platform is superseded by the
wenzelm@36201
  1856
ISABELLE_PLATFORM setting variable, which defaults to the 32 bit
wenzelm@36201
  1857
variant, even on a 64 bit machine.  The following example setting
wenzelm@36201
  1858
prefers 64 bit if available:
wenzelm@36201
  1859
wenzelm@36201
  1860
  ML_PLATFORM="${ISABELLE_PLATFORM64:-$ISABELLE_PLATFORM}"
wenzelm@36201
  1861
wenzelm@37218
  1862
* The preliminary Isabelle/jEdit application demonstrates the emerging
wenzelm@37218
  1863
Isabelle/Scala layer for advanced prover interaction and integration.
wenzelm@37218
  1864
See src/Tools/jEdit or "isabelle jedit" provided by the properly built
wenzelm@37218
  1865
component.
wenzelm@37218
  1866
wenzelm@37375
  1867
* "IsabelleText" is a Unicode font derived from Bitstream Vera Mono
wenzelm@37375
  1868
and Bluesky TeX fonts.  It provides the usual Isabelle symbols,
wenzelm@37375
  1869
similar to the default assignment of the document preparation system
wenzelm@37375
  1870
(cf. isabellesym.sty).  The Isabelle/Scala class Isabelle_System
wenzelm@37375
  1871
provides some operations for direct access to the font without asking
wenzelm@37375
  1872
the user for manual installation.
wenzelm@37375
  1873
wenzelm@34238
  1874
haftmann@33993
  1875
wenzelm@33842
  1876
New in Isabelle2009-1 (December 2009)
wenzelm@33842
  1877
-------------------------------------
wenzelm@30904
  1878
wenzelm@31547
  1879
*** General ***
wenzelm@31547
  1880
wenzelm@31547
  1881
* Discontinued old form of "escaped symbols" such as \\<forall>.  Only
wenzelm@31547
  1882
one backslash should be used, even in ML sources.
wenzelm@31547
  1883
wenzelm@31547
  1884
haftmann@30951
  1885
*** Pure ***
haftmann@30951
  1886
ballarin@32846
  1887
* Locale interpretation propagates mixins along the locale hierarchy.
ballarin@32846
  1888
The currently only available mixins are the equations used to map
ballarin@32846
  1889
local definitions to terms of the target domain of an interpretation.
ballarin@32846
  1890
wenzelm@33842
  1891
* Reactivated diagnostic command 'print_interps'.  Use "print_interps
wenzelm@33842
  1892
loc" to print all interpretations of locale "loc" in the theory.
wenzelm@33842
  1893
Interpretations in proofs are not shown.
ballarin@32846
  1894
ballarin@32983
  1895
* Thoroughly revised locales tutorial.  New section on conditional
ballarin@32983
  1896
interpretation.
ballarin@32983
  1897
wenzelm@33843
  1898
* On instantiation of classes, remaining undefined class parameters
wenzelm@33843
  1899
are formally declared.  INCOMPATIBILITY.
wenzelm@33843
  1900
haftmann@30951
  1901
wenzelm@33842
  1902
*** Document preparation ***
wenzelm@33842
  1903
wenzelm@33842
  1904
* New generalized style concept for printing terms: @{foo (style) ...}
wenzelm@33842
  1905
instead of @{foo_style style ...}  (old form is still retained for
wenzelm@33842
  1906
backward compatibility).  Styles can be also applied for
wenzelm@33842
  1907
antiquotations prop, term_type and typeof.
haftmann@32891
  1908
haftmann@32891
  1909
haftmann@30930
  1910
*** HOL ***
haftmann@30930
  1911
wenzelm@33842
  1912
* New proof method "smt" for a combination of first-order logic with
wenzelm@33842
  1913
equality, linear and nonlinear (natural/integer/real) arithmetic, and
wenzelm@33842
  1914
fixed-size bitvectors; there is also basic support for higher-order
wenzelm@33842
  1915
features (esp. lambda abstractions).  It is an incomplete decision
wenzelm@33842
  1916
procedure based on external SMT solvers using the oracle mechanism;
wenzelm@33842
  1917
for the SMT solver Z3, this method is proof-producing.  Certificates
wenzelm@33842
  1918
are provided to avoid calling the external solvers solely for
wenzelm@33842
  1919
re-checking proofs.  Due to a remote SMT service there is no need for
wenzelm@33842
  1920
installing SMT solvers locally.  See src/HOL/SMT.
wenzelm@33842
  1921
wenzelm@33842
  1922
* New commands to load and prove verification conditions generated by
wenzelm@33842
  1923
the Boogie program verifier or derived systems (e.g. the Verifying C
wenzelm@33842
  1924
Compiler (VCC) or Spec#).  See src/HOL/Boogie.
wenzelm@33842
  1925
wenzelm@33842
  1926
* New counterexample generator tool 'nitpick' based on the Kodkod
wenzelm@33842
  1927
relational model finder.  See src/HOL/Tools/Nitpick and
wenzelm@33842
  1928
src/HOL/Nitpick_Examples.
wenzelm@33842
  1929
haftmann@33860
  1930
* New commands 'code_pred' and 'values' to invoke the predicate
haftmann@33860
  1931
compiler and to enumerate values of inductive predicates.
haftmann@33860
  1932
haftmann@33860
  1933
* A tabled implementation of the reflexive transitive closure.
haftmann@33860
  1934
haftmann@33860
  1935
* New implementation of quickcheck uses generic code generator;
haftmann@33860
  1936
default generators are provided for all suitable HOL types, records
haftmann@33860
  1937
and datatypes.  Old quickcheck can be re-activated importing theory
haftmann@33860
  1938
Library/SML_Quickcheck.
haftmann@33860
  1939
wenzelm@33843
  1940
* New testing tool Mirabelle for automated proof tools.  Applies
wenzelm@33843
  1941
several tools and tactics like sledgehammer, metis, or quickcheck, to
wenzelm@33843
  1942
every proof step in a theory.  To be used in batch mode via the
wenzelm@33843
  1943
"mirabelle" utility.
wenzelm@33843
  1944
wenzelm@33843
  1945
* New proof method "sos" (sum of squares) for nonlinear real
wenzelm@33843
  1946
arithmetic (originally due to John Harison). It requires theory
wenzelm@33843
  1947
Library/Sum_Of_Squares.  It is not a complete decision procedure but
wenzelm@33843
  1948
works well in practice on quantifier-free real arithmetic with +, -,
wenzelm@33843
  1949
*, ^, =, <= and <, i.e. boolean combinations of equalities and
wenzelm@33843
  1950
inequalities between polynomials.  It makes use of external
wenzelm@33843
  1951
semidefinite programming solvers.  Method "sos" generates a
wenzelm@33843
  1952
certificate that can be pasted into the proof thus avoiding the need
wenzelm@33843
  1953
to call an external tool every time the proof is checked.  See
wenzelm@33843
  1954
src/HOL/Library/Sum_Of_Squares.
wenzelm@33843
  1955
wenzelm@33843
  1956
* New method "linarith" invokes existing linear arithmetic decision
wenzelm@33843
  1957
procedure only.
wenzelm@33843
  1958
wenzelm@33843
  1959
* New command 'atp_minimal' reduces result produced by Sledgehammer.
wenzelm@33843
  1960
wenzelm@33843
  1961
* New Sledgehammer option "Full Types" in Proof General settings menu.
wenzelm@33843
  1962
Causes full type information to be output to the ATPs.  This slows
wenzelm@33843
  1963
ATPs down considerably but eliminates a source of unsound "proofs"
wenzelm@33843
  1964
that fail later.
wenzelm@33843
  1965
wenzelm@33843
  1966
* New method "metisFT": A version of metis that uses full type
wenzelm@33843
  1967
information in order to avoid failures of proof reconstruction.
wenzelm@33843
  1968
wenzelm@33843
  1969
* New evaluator "approximate" approximates an real valued term using
wenzelm@33843
  1970
the same method as the approximation method.
wenzelm@33843
  1971
wenzelm@33843
  1972
* Method "approximate" now supports arithmetic expressions as
wenzelm@33843
  1973
boundaries of intervals and implements interval splitting and Taylor
wenzelm@33843
  1974
series expansion.
wenzelm@33843
  1975
wenzelm@33843
  1976
* ML antiquotation @{code_datatype} inserts definition of a datatype
wenzelm@33843
  1977
generated by the code generator; e.g. see src/HOL/Predicate.thy.
wenzelm@33843
  1978
haftmann@33860
  1979
* New theory SupInf of the supremum and infimum operators for sets of
haftmann@33860
  1980
reals.
haftmann@33860
  1981
haftmann@33860
  1982
* New theory Probability, which contains a development of measure
haftmann@33860
  1983
theory, eventually leading to Lebesgue integration and probability.
haftmann@33860
  1984
haftmann@33860
  1985
* Extended Multivariate Analysis to include derivation and Brouwer's
haftmann@33860
  1986
fixpoint theorem.
wenzelm@33843
  1987
wenzelm@33842
  1988
* Reorganization of number theory, INCOMPATIBILITY:
wenzelm@33873
  1989
  - new number theory development for nat and int, in theories Divides
wenzelm@33873
  1990
    and GCD as well as in new session Number_Theory
wenzelm@33873
  1991
  - some constants and facts now suffixed with _nat and _int
wenzelm@33873
  1992
    accordingly
wenzelm@33873
  1993
  - former session NumberTheory now named Old_Number_Theory, including
wenzelm@33873
  1994
    theories Legacy_GCD and Primes (prefer Number_Theory if possible)
wenzelm@33842
  1995
  - moved theory Pocklington from src/HOL/Library to
wenzelm@33842
  1996
    src/HOL/Old_Number_Theory
haftmann@32479
  1997
wenzelm@33873
  1998
* Theory GCD includes functions Gcd/GCD and Lcm/LCM for the gcd and
wenzelm@33873
  1999
lcm of finite and infinite sets. It is shown that they form a complete
haftmann@32600
  2000
lattice.
haftmann@32600
  2001
haftmann@32600
  2002
* Class semiring_div requires superclass no_zero_divisors and proof of
haftmann@32600
  2003
div_mult_mult1; theorems div_mult_mult1, div_mult_mult2,
haftmann@32600
  2004
div_mult_mult1_if, div_mult_mult1 and div_mult_mult2 have been
haftmann@32600
  2005
generalized to class semiring_div, subsuming former theorems
haftmann@32600
  2006
zdiv_zmult_zmult1, zdiv_zmult_zmult1_if, zdiv_zmult_zmult1 and
haftmann@32600
  2007
zdiv_zmult_zmult2.  div_mult_mult1 is now [simp] by default.
haftmann@32600
  2008
INCOMPATIBILITY.
haftmann@32600
  2009
haftmann@32588
  2010
* Refinements to lattice classes and sets:
haftmann@32064
  2011
  - less default intro/elim rules in locale variant, more default
haftmann@32064
  2012
    intro/elim rules in class variant: more uniformity
wenzelm@33842
  2013
  - lemma ge_sup_conv renamed to le_sup_iff, in accordance with
wenzelm@33842
  2014
    le_inf_iff
wenzelm@33842
  2015
  - dropped lemma alias inf_ACI for inf_aci (same for sup_ACI and
wenzelm@33842
  2016
    sup_aci)
haftmann@32064
  2017
  - renamed ACI to inf_sup_aci
haftmann@32600
  2018
  - new class "boolean_algebra"
wenzelm@33842
  2019
  - class "complete_lattice" moved to separate theory
haftmann@33860
  2020
    "Complete_Lattice"; corresponding constants (and abbreviations)
wenzelm@33842
  2021
    renamed and with authentic syntax:
haftmann@33860
  2022
    Set.Inf ~>    Complete_Lattice.Inf
haftmann@33860
  2023
    Set.Sup ~>    Complete_Lattice.Sup
haftmann@33860
  2024
    Set.INFI ~>   Complete_Lattice.INFI
haftmann@33860
  2025
    Set.SUPR ~>   Complete_Lattice.SUPR
haftmann@33860
  2026
    Set.Inter ~>  Complete_Lattice.Inter
haftmann@33860
  2027
    Set.Union ~>  Complete_Lattice.Union
haftmann@33860
  2028
    Set.INTER ~>  Complete_Lattice.INTER
haftmann@33860
  2029
    Set.UNION ~>  Complete_Lattice.UNION
haftmann@32600
  2030
  - authentic syntax for
haftmann@32600
  2031
    Set.Pow
haftmann@32600
  2032
    Set.image
haftmann@32588
  2033
  - mere abbreviations:
haftmann@32588
  2034
    Set.empty               (for bot)
haftmann@32588
  2035
    Set.UNIV                (for top)
haftmann@33860
  2036
    Set.inter               (for inf, formerly Set.Int)
haftmann@33860
  2037
    Set.union               (for sup, formerly Set.Un)
haftmann@32588
  2038
    Complete_Lattice.Inter  (for Inf)
haftmann@32588
  2039
    Complete_Lattice.Union  (for Sup)
haftmann@32606
  2040
    Complete_Lattice.INTER  (for INFI)
haftmann@32606
  2041
    Complete_Lattice.UNION  (for SUPR)
haftmann@32600
  2042
  - object-logic definitions as far as appropriate
haftmann@32217
  2043
haftmann@32691
  2044
INCOMPATIBILITY.  Care is required when theorems Int_subset_iff or
wenzelm@33842
  2045
Un_subset_iff are explicitly deleted as default simp rules; then also
wenzelm@33842
  2046
their lattice counterparts le_inf_iff and le_sup_iff have to be
haftmann@32691
  2047
deleted to achieve the desired effect.
haftmann@32064
  2048
wenzelm@33842
  2049
* Rules inf_absorb1, inf_absorb2, sup_absorb1, sup_absorb2 are no simp
wenzelm@33842
  2050
rules by default any longer; the same applies to min_max.inf_absorb1
wenzelm@33842
  2051
etc.  INCOMPATIBILITY.
wenzelm@33842
  2052
wenzelm@33842
  2053
* Rules sup_Int_eq and sup_Un_eq are no longer declared as
wenzelm@33842
  2054
pred_set_conv by default.  INCOMPATIBILITY.
wenzelm@33842
  2055
wenzelm@33842
  2056
* Power operations on relations and functions are now one dedicated
haftmann@32706
  2057
constant "compow" with infix syntax "^^".  Power operation on
wenzelm@31547
  2058
multiplicative monoids retains syntax "^" and is now defined generic
wenzelm@31547
  2059
in class power.  INCOMPATIBILITY.
wenzelm@31547
  2060
wenzelm@33842
  2061
* Relation composition "R O S" now has a more standard argument order:
wenzelm@33842
  2062
"R O S = {(x, z). EX y. (x, y) : R & (y, z) : S}".  INCOMPATIBILITY,
wenzelm@33842
  2063
rewrite propositions with "S O R" --> "R O S". Proofs may occasionally
wenzelm@33842
  2064
break, since the O_assoc rule was not rewritten like this.  Fix using
wenzelm@33842
  2065
O_assoc[symmetric].  The same applies to the curried version "R OO S".
wenzelm@32427
  2066
nipkow@33057
  2067
* Function "Inv" is renamed to "inv_into" and function "inv" is now an
wenzelm@33842
  2068
abbreviation for "inv_into UNIV".  Lemmas are renamed accordingly.
nipkow@32988
  2069
INCOMPATIBILITY.
nipkow@32988
  2070
haftmann@33860
  2071
* Most rules produced by inductive and datatype package have mandatory
haftmann@33860
  2072
prefixes.  INCOMPATIBILITY.
nipkow@31790
  2073
wenzelm@33842
  2074
* Changed "DERIV_intros" to a dynamic fact, which can be augmented by
wenzelm@33842
  2075
the attribute of the same name.  Each of the theorems in the list
wenzelm@33842
  2076
DERIV_intros assumes composition with an additional function and
wenzelm@33842
  2077
matches a variable to the derivative, which has to be solved by the
wenzelm@33842
  2078
Simplifier.  Hence (auto intro!: DERIV_intros) computes the derivative
wenzelm@33873
  2079
of most elementary terms.  Former Maclauren.DERIV_tac and
wenzelm@33873
  2080
Maclauren.deriv_tac should be replaced by (auto intro!: DERIV_intros).
wenzelm@33873
  2081
INCOMPATIBILITY.
haftmann@33860
  2082
haftmann@33860
  2083
* Code generator attributes follow the usual underscore convention:
haftmann@33860
  2084
    code_unfold     replaces    code unfold
haftmann@33860
  2085
    code_post       replaces    code post
haftmann@33860
  2086
    etc.
haftmann@33860
  2087
  INCOMPATIBILITY.
wenzelm@31900
  2088
krauss@33471
  2089
* Renamed methods:
krauss@33471
  2090
    sizechange -> size_change
krauss@33471
  2091
    induct_scheme -> induction_schema
haftmann@33860
  2092
  INCOMPATIBILITY.
nipkow@33673
  2093
wenzelm@33843
  2094
* Discontinued abbreviation "arbitrary" of constant "undefined".
wenzelm@33843
  2095
INCOMPATIBILITY, use "undefined" directly.
wenzelm@33843
  2096
haftmann@33860
  2097
* Renamed theorems:
haftmann@33860
  2098
    Suc_eq_add_numeral_1 -> Suc_eq_plus1
haftmann@33860
  2099
    Suc_eq_add_numeral_1_left -> Suc_eq_plus1_left
haftmann@33860
  2100
    Suc_plus1 -> Suc_eq_plus1
haftmann@33860
  2101
    *anti_sym -> *antisym*
haftmann@33860
  2102
    vector_less_eq_def -> vector_le_def
haftmann@33860
  2103
  INCOMPATIBILITY.
haftmann@33860
  2104
haftmann@33860
  2105
* Added theorem List.map_map as [simp].  Removed List.map_compose.
haftmann@33860
  2106
INCOMPATIBILITY.
haftmann@33860
  2107
haftmann@33860
  2108
* Removed predicate "M hassize n" (<--> card M = n & finite M).
haftmann@33860
  2109
INCOMPATIBILITY.
haftmann@33860
  2110
hoelzl@31812
  2111
huffman@33825
  2112
*** HOLCF ***
huffman@33825
  2113
wenzelm@33842
  2114
* Theory Representable defines a class "rep" of domains that are
wenzelm@33842
  2115
representable (via an ep-pair) in the universal domain type "udom".
huffman@33825
  2116
Instances are provided for all type constructors defined in HOLCF.
huffman@33825
  2117
huffman@33825
  2118
* The 'new_domain' command is a purely definitional version of the
huffman@33825
  2119
domain package, for representable domains.  Syntax is identical to the
huffman@33825
  2120
old domain package.  The 'new_domain' package also supports indirect
huffman@33825
  2121
recursion using previously-defined type constructors.  See
wenzelm@33842
  2122
src/HOLCF/ex/New_Domain.thy for examples.
wenzelm@33842
  2123
wenzelm@33842
  2124
* Method "fixrec_simp" unfolds one step of a fixrec-defined constant
huffman@33825
  2125
on the left-hand side of an equation, and then performs
huffman@33825
  2126
simplification.  Rewriting is done using rules declared with the
wenzelm@33842
  2127
"fixrec_simp" attribute.  The "fixrec_simp" method is intended as a
wenzelm@33842
  2128
replacement for "fixpat"; see src/HOLCF/ex/Fixrec_ex.thy for examples.
huffman@33825
  2129
huffman@33825
  2130
* The pattern-match compiler in 'fixrec' can now handle constructors
huffman@33825
  2131
with HOL function types.  Pattern-match combinators for the Pair
huffman@33825
  2132
constructor are pre-configured.
huffman@33825
  2133
huffman@33825
  2134
* The 'fixrec' package now produces better fixed-point induction rules
huffman@33825
  2135
for mutually-recursive definitions:  Induction rules have conclusions
huffman@33825
  2136
of the form "P foo bar" instead of "P <foo, bar>".
huffman@33825
  2137
huffman@33825
  2138
* The constant "sq_le" (with infix syntax "<<" or "\<sqsubseteq>") has
huffman@33825
  2139
been renamed to "below".  The name "below" now replaces "less" in many
wenzelm@33842
  2140
theorem names.  (Legacy theorem names using "less" are still supported
wenzelm@33842
  2141
as well.)
huffman@33825
  2142
huffman@33825
  2143
* The 'fixrec' package now supports "bottom patterns".  Bottom
huffman@33825
  2144
patterns can be used to generate strictness rules, or to make
huffman@33825
  2145
functions more strict (much like the bang-patterns supported by the
wenzelm@33873
  2146
Glasgow Haskell Compiler).  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@33873
  2147
examples.
huffman@33825
  2148
huffman@33825
  2149
wenzelm@31304
  2150
*** ML ***
wenzelm@31304
  2151
wenzelm@33843
  2152
* Support for Poly/ML 5.3.0, with improved reporting of compiler
wenzelm@33843
  2153
errors and run-time exceptions, including detailed source positions.
wenzelm@33843
  2154
wenzelm@33843
  2155
* Structure Name_Space (formerly NameSpace) now manages uniquely
wenzelm@33843
  2156
identified entries, with some additional information such as source
wenzelm@33843
  2157
position, logical grouping etc.
wenzelm@33843
  2158
wenzelm@33524
  2159
* Theory and context data is now introduced by the simplified and
wenzelm@33524
  2160
modernized functors Theory_Data, Proof_Data, Generic_Data.  Data needs
wenzelm@33524
  2161
to be pure, but the old TheoryDataFun for mutable data (with explicit
wenzelm@33524
  2162
copy operation) is still available for some time.
wenzelm@33524
  2163
wenzelm@32742
  2164
* Structure Synchronized (cf. src/Pure/Concurrent/synchronized.ML)
wenzelm@32742
  2165
provides a high-level programming interface to synchronized state
wenzelm@32742
  2166
variables with atomic update.  This works via pure function
wenzelm@32742
  2167
application within a critical section -- its runtime should be as
wenzelm@32742
  2168
short as possible; beware of deadlocks if critical code is nested,
wenzelm@32742
  2169
either directly or indirectly via other synchronized variables!
wenzelm@32742
  2170
wenzelm@32742
  2171
* Structure Unsynchronized (cf. src/Pure/ML-Systems/unsynchronized.ML)
wenzelm@32742
  2172
wraps raw ML references, explicitly indicating their non-thread-safe
wenzelm@32742
  2173
behaviour.  The Isar toplevel keeps this structure open, to
wenzelm@32742
  2174
accommodate Proof General as well as quick and dirty interactive
wenzelm@32742
  2175
experiments with references.
wenzelm@32742
  2176
wenzelm@32365
  2177
* PARALLEL_CHOICE and PARALLEL_GOALS provide basic support for
wenzelm@32365
  2178
parallel tactical reasoning.
wenzelm@32365
  2179
wenzelm@32427
  2180
* Tacticals Subgoal.FOCUS, Subgoal.FOCUS_PREMS, Subgoal.FOCUS_PARAMS
wenzelm@32427
  2181
are similar to SUBPROOF, but are slightly more flexible: only the
wenzelm@32427
  2182
specified parts of the subgoal are imported into the context, and the
wenzelm@32427
  2183
body tactic may introduce new subgoals and schematic variables.
wenzelm@32427
  2184
wenzelm@32427
  2185
* Old tactical METAHYPS, which does not observe the proof context, has
wenzelm@32427
  2186
been renamed to Old_Goals.METAHYPS and awaits deletion.  Use SUBPROOF
wenzelm@32427
  2187
or Subgoal.FOCUS etc.
wenzelm@32216
  2188
wenzelm@31971
  2189
* Renamed functor TableFun to Table, and GraphFun to Graph.  (Since
wenzelm@31971
  2190
functors have their own ML name space there is no point to mark them
wenzelm@31971
  2191
separately.)  Minor INCOMPATIBILITY.
wenzelm@31971
  2192
wenzelm@31901
  2193
* Renamed NamedThmsFun to Named_Thms.  INCOMPATIBILITY.
wenzelm@31901
  2194
wenzelm@33842
  2195
* Renamed several structures FooBar to Foo_Bar.  Occasional,
wenzelm@33842
  2196
INCOMPATIBILITY.
wenzelm@33842
  2197
wenzelm@33843
  2198
* Operations of structure Skip_Proof no longer require quick_and_dirty
wenzelm@33843
  2199
mode, which avoids critical setmp.
wenzelm@33843
  2200
wenzelm@31306
  2201
* Eliminated old Attrib.add_attributes, Method.add_methods and related
wenzelm@33842
  2202
combinators for "args".  INCOMPATIBILITY, need to use simplified
wenzelm@31306
  2203
Attrib/Method.setup introduced in Isabelle2009.
wenzelm@31304
  2204
wenzelm@32151
  2205
* Proper context for simpset_of, claset_of, clasimpset_of.  May fall
wenzelm@32151
  2206
back on global_simpset_of, global_claset_of, global_clasimpset_of as
wenzelm@32151
  2207
last resort.  INCOMPATIBILITY.
wenzelm@32151
  2208
wenzelm@32092
  2209
* Display.pretty_thm now requires a proper context (cf. former
wenzelm@32092
  2210
ProofContext.pretty_thm).  May fall back on Display.pretty_thm_global
wenzelm@32092
  2211
or even Display.pretty_thm_without_context as last resort.
wenzelm@32092
  2212
INCOMPATIBILITY.
wenzelm@32092
  2213
wenzelm@32433
  2214
* Discontinued Display.pretty_ctyp/cterm etc.  INCOMPATIBILITY, use
wenzelm@32433
  2215
Syntax.pretty_typ/term directly, preferably with proper context
wenzelm@32433
  2216
instead of global theory.
wenzelm@32433
  2217
wenzelm@31304
  2218
wenzelm@31308
  2219
*** System ***
wenzelm@31308
  2220
wenzelm@33842
  2221
* Further fine tuning of parallel proof checking, scales up to 8 cores
wenzelm@33842
  2222
(max. speedup factor 5.0).  See also Goal.parallel_proofs in ML and
wenzelm@33842
  2223
usedir option -q.
wenzelm@33842
  2224
wenzelm@32326
  2225
* Support for additional "Isabelle components" via etc/components, see
wenzelm@32326
  2226
also the system manual.
wenzelm@32326
  2227
wenzelm@32326
  2228
* The isabelle makeall tool now operates on all components with
wenzelm@32326
  2229
IsaMakefile, not just hardwired "logics".
wenzelm@32326
  2230
wenzelm@33842
  2231
* Removed "compress" option from isabelle-process and isabelle usedir;
wenzelm@33842
  2232
this is always enabled.
kleing@33818
  2233
wenzelm@31308
  2234
* Discontinued support for Poly/ML 4.x versions.
wenzelm@31308
  2235
wenzelm@33842
  2236
* Isabelle tool "wwwfind" provides web interface for 'find_theorems'
wenzelm@33842
  2237
on a given logic image.  This requires the lighttpd webserver and is
wenzelm@33842
  2238
currently supported on Linux only.
wenzelm@32061
  2239
wenzelm@31308
  2240
wenzelm@31304
  2241
wenzelm@30845
  2242
New in Isabelle2009 (April 2009)
wenzelm@30845
  2243
--------------------------------
haftmann@27104
  2244
wenzelm@27599
  2245
*** General ***
wenzelm@27599
  2246
wenzelm@28504
  2247
* Simplified main Isabelle executables, with less surprises on
wenzelm@28504
  2248
case-insensitive file-systems (such as Mac OS).
wenzelm@28504
  2249
wenzelm@28504
  2250
  - The main Isabelle tool wrapper is now called "isabelle" instead of
wenzelm@28504
  2251
    "isatool."
wenzelm@28504
  2252
wenzelm@28504
  2253
  - The former "isabelle" alias for "isabelle-process" has been
wenzelm@28504
  2254
    removed (should rarely occur to regular users).
wenzelm@28504
  2255
wenzelm@28915
  2256
  - The former "isabelle-interface" and its alias "Isabelle" have been
wenzelm@28915
  2257
    removed (interfaces are now regular Isabelle tools).
wenzelm@28504
  2258
wenzelm@28504
  2259
Within scripts and make files, the Isabelle environment variables
wenzelm@28504
  2260
ISABELLE_TOOL and ISABELLE_PROCESS replace old ISATOOL and ISABELLE,
wenzelm@28504
  2261
respectively.  (The latter are still available as legacy feature.)
wenzelm@28504
  2262
wenzelm@28915
  2263
The old isabelle-interface wrapper could react in confusing ways if
wenzelm@28915
  2264
the interface was uninstalled or changed otherwise.  Individual
wenzelm@28915
  2265
interface tool configuration is now more explicit, see also the
wenzelm@28915
  2266
Isabelle system manual.  In particular, Proof General is now available
wenzelm@28915
  2267
via "isabelle emacs".
wenzelm@28504
  2268
wenzelm@28504
  2269
INCOMPATIBILITY, need to adapt derivative scripts.  Users may need to
wenzelm@28504
  2270
purge installed copies of Isabelle executables and re-run "isabelle
wenzelm@28504
  2271
install -p ...", or use symlinks.
wenzelm@28504
  2272
wenzelm@28914
  2273
* The default for ISABELLE_HOME_USER is now ~/.isabelle instead of the
wenzelm@30845
  2274
old ~/isabelle, which was slightly non-standard and apt to cause
wenzelm@30845
  2275
surprises on case-insensitive file-systems (such as Mac OS).
wenzelm@28914
  2276
wenzelm@28914
  2277
INCOMPATIBILITY, need to move existing ~/isabelle/etc,
wenzelm@28914
  2278
~/isabelle/heaps, ~/isabelle/browser_info to the new place.  Special
wenzelm@28914
  2279
care is required when using older releases of Isabelle.  Note that
wenzelm@28914
  2280
ISABELLE_HOME_USER can be changed in Isabelle/etc/settings of any
wenzelm@30845
  2281
Isabelle distribution, in order to use the new ~/.isabelle uniformly.
wenzelm@28914
  2282
wenzelm@29161
  2283
* Proofs of fully specified statements are run in parallel on
wenzelm@30845
  2284
multi-core systems.  A speedup factor of 2.5 to 3.2 can be expected on
wenzelm@30845
  2285
a regular 4-core machine, if the initial heap space is made reasonably
wenzelm@30845
  2286
large (cf. Poly/ML option -H).  (Requires Poly/ML 5.2.1 or later.)
wenzelm@30845
  2287
wenzelm@30845
  2288
* The main reference manuals ("isar-ref", "implementation", and
wenzelm@30845
  2289
"system") have been updated and extended.  Formally checked references
wenzelm@30845
  2290
as hyperlinks are now available uniformly.
wenzelm@30845
  2291
wenzelm@30163
  2292
wenzelm@27599
  2293
*** Pure ***
wenzelm@27599
  2294
wenzelm@30845
  2295
* Complete re-implementation of locales.  INCOMPATIBILITY in several
wenzelm@30845
  2296
respects.  The most important changes are listed below.  See the
wenzelm@30845
  2297
Tutorial on Locales ("locales" manual) for details.
ballarin@29253
  2298
ballarin@29253
  2299
- In locale expressions, instantiation replaces renaming.  Parameters
ballarin@29253
  2300
must be declared in a for clause.  To aid compatibility with previous
ballarin@29253
  2301
parameter inheritance, in locale declarations, parameters that are not
ballarin@29253
  2302
'touched' (instantiation position "_" or omitted) are implicitly added
ballarin@29253
  2303
with their syntax at the beginning of the for clause.
ballarin@29253
  2304
ballarin@29253
  2305
- Syntax from abbreviations and definitions in locales is available in
ballarin@29253
  2306
locale expressions and context elements.  The latter is particularly
ballarin@29253
  2307
useful in locale declarations.
ballarin@29253
  2308
ballarin@29253
  2309
- More flexible mechanisms to qualify names generated by locale
ballarin@29253
  2310
expressions.  Qualifiers (prefixes) may be specified in locale
wenzelm@30728
  2311
expressions, and can be marked as mandatory (syntax: "name!:") or
wenzelm@30728
  2312
optional (syntax "name?:").  The default depends for plain "name:"
wenzelm@30728
  2313
depends on the situation where a locale expression is used: in
wenzelm@30728
  2314
commands 'locale' and 'sublocale' prefixes are optional, in
wenzelm@30845
  2315
'interpretation' and 'interpret' prefixes are mandatory.  The old
wenzelm@30728
  2316
implicit qualifiers derived from the parameter names of a locale are
wenzelm@30728
  2317
no longer generated.
wenzelm@30106
  2318
wenzelm@30845
  2319
- Command "sublocale l < e" replaces "interpretation l < e".  The
wenzelm@30106
  2320
instantiation clause in "interpretation" and "interpret" (square
wenzelm@30106
  2321
brackets) is no longer available.  Use locale expressions.
ballarin@29253
  2322
wenzelm@30845
  2323
- When converting proof scripts, mandatory qualifiers in
wenzelm@30728
  2324
'interpretation' and 'interpret' should be retained by default, even
wenzelm@30845
  2325
if this is an INCOMPATIBILITY compared to former behavior.  In the
wenzelm@30845
  2326
worst case, use the "name?:" form for non-mandatory ones.  Qualifiers
wenzelm@30845
  2327
in locale expressions range over a single locale instance only.
wenzelm@30845
  2328
wenzelm@30845
  2329
- Dropped locale element "includes".  This is a major INCOMPATIBILITY.
wenzelm@30845
  2330
In existing theorem specifications replace the includes element by the
wenzelm@30845
  2331
respective context elements of the included locale, omitting those
wenzelm@30845
  2332
that are already present in the theorem specification.  Multiple
wenzelm@30845
  2333
assume elements of a locale should be replaced by a single one
wenzelm@30845
  2334
involving the locale predicate.  In the proof body, declarations (most
wenzelm@30845
  2335
notably theorems) may be regained by interpreting the respective
wenzelm@30845
  2336
locales in the proof context as required (command "interpret").
wenzelm@30845
  2337
wenzelm@30845
  2338
If using "includes" in replacement of a target solely because the
wenzelm@30845
  2339
parameter types in the theorem are not as general as in the target,
wenzelm@30845
  2340
consider declaring a new locale with additional type constraints on
wenzelm@30845
  2341
the parameters (context element "constrains").
wenzelm@30845
  2342
wenzelm@30845
  2343
- Discontinued "locale (open)".  INCOMPATIBILITY.
wenzelm@30845
  2344
wenzelm@30845
  2345
- Locale interpretation commands no longer attempt to simplify goal.
wenzelm@30845
  2346
INCOMPATIBILITY: in rare situations the generated goal differs.  Use
wenzelm@30845
  2347
methods intro_locales and unfold_locales to clarify.
wenzelm@30845
  2348
wenzelm@30845
  2349
- Locale interpretation commands no longer accept interpretation
wenzelm@30845
  2350
attributes.  INCOMPATIBILITY.
wenzelm@30845
  2351
wenzelm@30845
  2352
* Class declaration: so-called "base sort" must not be given in import
wenzelm@30845
  2353
list any longer, but is inferred from the specification.  Particularly
wenzelm@30845
  2354
in HOL, write
wenzelm@30845
  2355
wenzelm@30845
  2356
    class foo = ...
wenzelm@30845
  2357
wenzelm@30845
  2358
instead of
wenzelm@30845
  2359
wenzelm@30845
  2360
    class foo = type + ...
wenzelm@30845
  2361
wenzelm@30845
  2362
* Class target: global versions of theorems stemming do not carry a
wenzelm@30845
  2363
parameter prefix any longer.  INCOMPATIBILITY.
wenzelm@30845
  2364
wenzelm@30845
  2365
* Class 'instance' command no longer accepts attached definitions.
wenzelm@30845
  2366
INCOMPATIBILITY, use proper 'instantiation' target instead.
wenzelm@30845
  2367
wenzelm@30845
  2368
* Recovered hiding of consts, which was accidentally broken in
wenzelm@30845
  2369
Isabelle2007.  Potential INCOMPATIBILITY, ``hide const c'' really
wenzelm@30845
  2370
makes c inaccessible; consider using ``hide (open) const c'' instead.
wenzelm@30845
  2371
wenzelm@30845
  2372
* Slightly more coherent Pure syntax, with updated documentation in
wenzelm@30845
  2373
isar-ref manual.  Removed locales meta_term_syntax and
wenzelm@30845
  2374
meta_conjunction_syntax: TERM and &&& (formerly &&) are now permanent,
wenzelm@30845
  2375
INCOMPATIBILITY in rare situations.  Note that &&& should not be used
wenzelm@30845
  2376
directly in regular applications.
wenzelm@30845
  2377
wenzelm@30845
  2378
* There is a new syntactic category "float_const" for signed decimal
wenzelm@30845
  2379
fractions (e.g. 123.45 or -123.45).
wenzelm@30845
  2380
wenzelm@30845
  2381
* Removed exotic 'token_translation' command.  INCOMPATIBILITY, use ML
wenzelm@30845
  2382
interface with 'setup' command instead.
wenzelm@30845
  2383
wenzelm@30845
  2384
* Command 'local_setup' is similar to 'setup', but operates on a local
wenzelm@30845
  2385
theory context.
haftmann@27104
  2386
wenzelm@28114
  2387
* The 'axiomatization' command now only works within a global theory
wenzelm@28114
  2388
context.  INCOMPATIBILITY.
wenzelm@28114
  2389
wenzelm@30845
  2390
* Goal-directed proof now enforces strict proof irrelevance wrt. sort
wenzelm@30845
  2391
hypotheses.  Sorts required in the course of reasoning need to be
wenzelm@30845
  2392
covered by the constraints in the initial statement, completed by the
wenzelm@30845
  2393
type instance information of the background theory.  Non-trivial sort
wenzelm@30845
  2394
hypotheses, which rarely occur in practice, may be specified via
wenzelm@30845
  2395
vacuous propositions of the form SORT_CONSTRAINT('a::c).  For example:
wenzelm@30845
  2396
wenzelm@30845
  2397
  lemma assumes "SORT_CONSTRAINT('a::empty)" shows False ...
wenzelm@30845
  2398
wenzelm@30845
  2399
The result contains an implicit sort hypotheses as before --
wenzelm@30845
  2400
SORT_CONSTRAINT premises are eliminated as part of the canonical rule
wenzelm@30845
  2401
normalization.
wenzelm@30845
  2402
wenzelm@30845
  2403
* Generalized Isar history, with support for linear undo, direct state
wenzelm@30845
  2404
addressing etc.
wenzelm@30845
  2405
wenzelm@30845
  2406
* Changed defaults for unify configuration options:
wenzelm@30845
  2407
wenzelm@30845
  2408
  unify_trace_bound = 50 (formerly 25)
wenzelm@30845
  2409
  unify_search_bound = 60 (formerly 30)
wenzelm@30845
  2410
wenzelm@30845
  2411
* Different bookkeeping for code equations (INCOMPATIBILITY):
wenzelm@30845
  2412
wenzelm@30845
  2413
  a) On theory merge, the last set of code equations for a particular
wenzelm@30845
  2414
     constant is taken (in accordance with the policy applied by other
wenzelm@30845
  2415
     parts of the code generator framework).
wenzelm@30845
  2416
wenzelm@30845
  2417
  b) Code equations stemming from explicit declarations (e.g. code
wenzelm@30845
  2418
     attribute) gain priority over default code equations stemming
wenzelm@30845
  2419
     from definition, primrec, fun etc.
wenzelm@30845
  2420
wenzelm@30845
  2421
* Keyword 'code_exception' now named 'code_abort'.  INCOMPATIBILITY.
wenzelm@30845
  2422
haftmann@30965
  2423
* Unified theorem tables for both code generators.  Thus [code
wenzelm@30845
  2424
func] has disappeared and only [code] remains.  INCOMPATIBILITY.
wenzelm@30577
  2425
wenzelm@30577
  2426
* Command 'find_consts' searches for constants based on type and name
wenzelm@30577
  2427
patterns, e.g.
kleing@29883
  2428
kleing@29883
  2429
    find_consts "_ => bool"
kleing@29883
  2430
wenzelm@30106
  2431
By default, matching is against subtypes, but it may be restricted to
wenzelm@30728
  2432
the whole type.  Searching by name is possible.  Multiple queries are
wenzelm@30106
  2433
conjunctive and queries may be negated by prefixing them with a
wenzelm@30106
  2434
hyphen:
kleing@29883
  2435
kleing@29883
  2436
    find_consts strict: "_ => bool" name: "Int" -"int => int"
kleing@29861
  2437
wenzelm@30845
  2438
* New 'find_theorems' criterion "solves" matches theorems that
wenzelm@30845
  2439
directly solve the current goal (modulo higher-order unification).
wenzelm@30845
  2440
wenzelm@30845
  2441
* Auto solve feature for main theorem statements: whenever a new goal
wenzelm@30845
  2442
is stated, "find_theorems solves" is called; any theorems that could
wenzelm@30845
  2443
solve the lemma directly are listed as part of the goal state.
wenzelm@30845
  2444
Cf. associated options in Proof General Isabelle settings menu,
wenzelm@30845
  2445
enabled by default, with reasonable timeout for pathological cases of
wenzelm@30845
  2446
higher-order unification.
webertj@30415
  2447
haftmann@27104
  2448
wenzelm@27381
  2449
*** Document preparation ***
wenzelm@27381
  2450
wenzelm@27381
  2451
* Antiquotation @{lemma} now imitates a regular terminal proof,
wenzelm@27392
  2452
demanding keyword 'by' and supporting the full method expression
wenzelm@27519
  2453
syntax just like the Isar command 'by'.
wenzelm@27381
  2454
wenzelm@27381
  2455
haftmann@27104
  2456
*** HOL ***
haftmann@27104
  2457
wenzelm@30845
  2458
* Integrated main parts of former image HOL-Complex with HOL.  Entry
wenzelm@30845
  2459
points Main and Complex_Main remain as before.
wenzelm@30845
  2460
wenzelm@30845
  2461
* Logic image HOL-Plain provides a minimal HOL with the most important
wenzelm@30845
  2462
tools available (inductive, datatype, primrec, ...).  This facilitates
wenzelm@30845
  2463
experimentation and tool development.  Note that user applications
wenzelm@30845
  2464
(and library theories) should never refer to anything below theory
wenzelm@30845
  2465
Main, as before.
wenzelm@30845
  2466
wenzelm@30845
  2467
* Logic image HOL-Main stops at theory Main, and thus facilitates
wenzelm@30845
  2468
experimentation due to shorter build times.
wenzelm@30845
  2469
wenzelm@30845
  2470
* Logic image HOL-NSA contains theories of nonstandard analysis which
wenzelm@30845
  2471
were previously part of former HOL-Complex.  Entry point Hyperreal
wenzelm@30845
  2472
remains valid, but theories formerly using Complex_Main should now use
wenzelm@30845
  2473
new entry point Hypercomplex.
wenzelm@30845
  2474
wenzelm@30845
  2475
* Generic ATP manager for Sledgehammer, based on ML threads instead of
wenzelm@30845
  2476
Posix processes.  Avoids potentially expensive forking of the ML
wenzelm@30845
  2477
process.  New thread-based implementation also works on non-Unix
wenzelm@30845
  2478
platforms (Cygwin).  Provers are no longer hardwired, but defined
wenzelm@30845
  2479
within the theory via plain ML wrapper functions.  Basic Sledgehammer
wenzelm@30845
  2480
commands are covered in the isar-ref manual.
wenzelm@30845
  2481
wenzelm@30845
  2482
* Wrapper scripts for remote SystemOnTPTP service allows to use
wenzelm@30845
  2483
sledgehammer without local ATP installation (Vampire etc.). Other
wenzelm@30845
  2484
provers may be included via suitable ML wrappers, see also
wenzelm@30845
  2485
src/HOL/ATP_Linkup.thy.
wenzelm@30845
  2486
wenzelm@30845
  2487
* ATP selection (E/Vampire/Spass) is now via Proof General's settings
wenzelm@30845
  2488
menu.
wenzelm@30845
  2489
wenzelm@30845
  2490
* The metis method no longer fails because the theorem is too trivial
wenzelm@30845
  2491
(contains the empty clause).
wenzelm@30845
  2492
wenzelm@30845
  2493
* The metis method now fails in the usual manner, rather than raising
wenzelm@30845
  2494
an exception, if it determines that it cannot prove the theorem.
wenzelm@30845
  2495
wenzelm@30845
  2496
* Method "coherent" implements a prover for coherent logic (see also
wenzelm@30845
  2497
src/Tools/coherent.ML).
wenzelm@30845
  2498
wenzelm@30845
  2499
* Constants "undefined" and "default" replace "arbitrary".  Usually
wenzelm@30845
  2500
"undefined" is the right choice to replace "arbitrary", though
wenzelm@30845
  2501
logically there is no difference.  INCOMPATIBILITY.
wenzelm@30845
  2502
wenzelm@30845
  2503
* Command "value" now integrates different evaluation mechanisms.  The
wenzelm@30845
  2504
result of the first successful evaluation mechanism is printed.  In
wenzelm@30845
  2505
square brackets a particular named evaluation mechanisms may be
wenzelm@30845
  2506
specified (currently, [SML], [code] or [nbe]).  See further
wenzelm@30845
  2507
src/HOL/ex/Eval_Examples.thy.
wenzelm@30845
  2508
wenzelm@30845
  2509
* Normalization by evaluation now allows non-leftlinear equations.
wenzelm@30845
  2510
Declare with attribute [code nbe].
wenzelm@30845
  2511
wenzelm@30845
  2512
* Methods "case_tac" and "induct_tac" now refer to the very same rules
wenzelm@30845
  2513
as the structured Isar versions "cases" and "induct", cf. the
wenzelm@30845
  2514
corresponding "cases" and "induct" attributes.  Mutual induction rules
wenzelm@30845
  2515
are now presented as a list of individual projections
wenzelm@30845
  2516
(e.g. foo_bar.inducts for types foo and bar); the old format with
wenzelm@30845
  2517
explicit HOL conjunction is no longer supported.  INCOMPATIBILITY, in
wenzelm@30845
  2518
rare situations a different rule is selected --- notably nested tuple
wenzelm@30845
  2519
elimination instead of former prod.exhaust: use explicit (case_tac t
wenzelm@30845
  2520
rule: prod.exhaust) here.
wenzelm@30845
  2521
wenzelm@30845
  2522
* Attributes "cases", "induct", "coinduct" support "del" option.
wenzelm@30845
  2523
wenzelm@30845
  2524
* Removed fact "case_split_thm", which duplicates "case_split".
wenzelm@30845
  2525
wenzelm@30845
  2526
* The option datatype has been moved to a new theory Option.  Renamed
wenzelm@30845
  2527
option_map to Option.map, and o2s to Option.set, INCOMPATIBILITY.
wenzelm@30845
  2528
wenzelm@30845
  2529
* New predicate "strict_mono" classifies strict functions on partial
wenzelm@30845
  2530
orders.  With strict functions on linear orders, reasoning about
wenzelm@30845
  2531
(in)equalities is facilitated by theorems "strict_mono_eq",
wenzelm@30845
  2532
"strict_mono_less_eq" and "strict_mono_less".
wenzelm@30845
  2533
wenzelm@30845
  2534
* Some set operations are now proper qualified constants with
wenzelm@30845
  2535
authentic syntax.  INCOMPATIBILITY:
haftmann@30304
  2536
haftmann@30304
  2537
    op Int ~>   Set.Int
haftmann@30304
  2538
    op Un ~>    Set.Un
haftmann@30304
  2539
    INTER ~>    Set.INTER
haftmann@30304
  2540
    UNION ~>    Set.UNION
haftmann@30304
  2541
    Inter ~>    Set.Inter
haftmann@30304
  2542
    Union ~>    Set.Union
haftmann@30304
  2543
    {} ~>       Set.empty
haftmann@30304
  2544
    UNIV ~>     Set.UNIV
haftmann@30304
  2545
wenzelm@30845
  2546
* Class complete_lattice with operations Inf, Sup, INFI, SUPR now in
wenzelm@30845
  2547
theory Set.
wenzelm@30845
  2548
wenzelm@30845
  2549
* Auxiliary class "itself" has disappeared -- classes without any
wenzelm@30845
  2550
parameter are treated as expected by the 'class' command.
haftmann@29797
  2551
haftmann@29823
  2552
* Leibnitz's Series for Pi and the arcus tangens and logarithm series.
haftmann@29823
  2553
wenzelm@30845
  2554
* Common decision procedures (Cooper, MIR, Ferrack, Approximation,
wenzelm@30845
  2555
Dense_Linear_Order) are now in directory HOL/Decision_Procs.
wenzelm@30845
  2556
wenzelm@30845
  2557
* Theory src/HOL/Decision_Procs/Approximation provides the new proof
wenzelm@30845
  2558
method "approximation".  It proves formulas on real values by using
wenzelm@30845
  2559
interval arithmetic.  In the formulas are also the transcendental
wenzelm@30845
  2560
functions sin, cos, tan, atan, ln, exp and the constant pi are
wenzelm@30845
  2561
allowed. For examples see
wenzelm@30845
  2562
src/HOL/Descision_Procs/ex/Approximation_Ex.thy.
haftmann@29823
  2563
haftmann@29823
  2564
* Theory "Reflection" now resides in HOL/Library.
haftmann@29650
  2565
wenzelm@30845
  2566
* Entry point to Word library now simply named "Word".
wenzelm@30845
  2567
INCOMPATIBILITY.
haftmann@29628
  2568
haftmann@29197
  2569
* Made source layout more coherent with logical distribution
haftmann@29197
  2570
structure:
haftmann@28952
  2571
haftmann@28952
  2572
    src/HOL/Library/RType.thy ~> src/HOL/Typerep.thy
haftmann@28952
  2573
    src/HOL/Library/Code_Message.thy ~> src/HOL/
haftmann@28952
  2574
    src/HOL/Library/GCD.thy ~> src/HOL/
haftmann@28952
  2575
    src/HOL/Library/Order_Relation.thy ~> src/HOL/
haftmann@28952
  2576
    src/HOL/Library/Parity.thy ~> src/HOL/
haftmann@28952
  2577
    src/HOL/Library/Univ_Poly.thy ~> src/HOL/
huffman@30176
  2578
    src/HOL/Real/ContNotDenum.thy ~> src/HOL/Library/
haftmann@28952
  2579
    src/HOL/Real/Lubs.thy ~> src/HOL/
haftmann@28952
  2580
    src/HOL/Real/PReal.thy ~> src/HOL/
haftmann@28952
  2581
    src/HOL/Real/Rational.thy ~> src/HOL/
haftmann@28952
  2582
    src/HOL/Real/RComplete.thy ~> src/HOL/
haftmann@28952
  2583
    src/HOL/Real/RealDef.thy ~> src/HOL/
haftmann@28952
  2584
    src/HOL/Real/RealPow.thy ~> src/HOL/
haftmann@28952
  2585
    src/HOL/Real/Real.thy ~> src/HOL/
haftmann@28952
  2586
    src/HOL/Complex/Complex_Main.thy ~> src/HOL/
haftmann@28952
  2587
    src/HOL/Complex/Complex.thy ~> src/HOL/
huffman@30176
  2588
    src/HOL/Complex/FrechetDeriv.thy ~> src/HOL/Library/
huffman@30176
  2589
    src/HOL/Complex/Fundamental_Theorem_Algebra.thy ~> src/HOL/Library/
haftmann@28952
  2590
    src/HOL/Hyperreal/Deriv.thy ~> src/HOL/
haftmann@28952
  2591
    src/HOL/Hyperreal/Fact.thy ~> src/HOL/
haftmann@28952
  2592
    src/HOL/Hyperreal/Integration.thy ~> src/HOL/
haftmann@28952
  2593
    src/HOL/Hyperreal/Lim.thy ~> src/HOL/
haftmann@28952
  2594
    src/HOL/Hyperreal/Ln.thy ~> src/HOL/
haftmann@28952
  2595
    src/HOL/Hyperreal/Log.thy ~> src/HOL/
haftmann@28952
  2596
    src/HOL/Hyperreal/MacLaurin.thy ~> src/HOL/
haftmann@28952
  2597
    src/HOL/Hyperreal/NthRoot.thy ~> src/HOL/
haftmann@28952
  2598
    src/HOL/Hyperreal/Series.thy ~> src/HOL/
haftmann@29197
  2599
    src/HOL/Hyperreal/SEQ.thy ~> src/HOL/
haftmann@28952
  2600
    src/HOL/Hyperreal/Taylor.thy ~> src/HOL/
haftmann@28952
  2601
    src/HOL/Hyperreal/Transcendental.thy ~> src/HOL/
haftmann@28952
  2602
    src/HOL/Real/Float ~> src/HOL/Library/
haftmann@29197
  2603
    src/HOL/Real/HahnBanach ~> src/HOL/HahnBanach
haftmann@29197
  2604
    src/HOL/Real/RealVector.thy ~> src/HOL/
haftmann@28952
  2605
haftmann@28952
  2606
    src/HOL/arith_data.ML ~> src/HOL/Tools
haftmann@28952
  2607
    src/HOL/hologic.ML ~> src/HOL/Tools
haftmann@28952
  2608
    src/HOL/simpdata.ML ~> src/HOL/Tools
haftmann@28952
  2609
    src/HOL/int_arith1.ML ~> src/HOL/Tools/int_arith.ML
haftmann@28952
  2610
    src/HOL/int_factor_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  2611
    src/HOL/nat_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  2612
    src/HOL/Real/float_arith.ML ~> src/HOL/Tools
haftmann@28952
  2613
    src/HOL/Real/float_syntax.ML ~> src/HOL/Tools
haftmann@28952
  2614
    src/HOL/Real/rat_arith.ML ~> src/HOL/Tools
haftmann@28952
  2615
    src/HOL/Real/real_arith.ML ~> src/HOL/Tools
haftmann@28952
  2616
haftmann@29398
  2617
    src/HOL/Library/Array.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2618
    src/HOL/Library/Heap_Monad.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2619
    src/HOL/Library/Heap.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2620
    src/HOL/Library/Imperative_HOL.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2621
    src/HOL/Library/Ref.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2622
    src/HOL/Library/Relational.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2623
wenzelm@30845
  2624
* If methods "eval" and "evaluation" encounter a structured proof
wenzelm@30845
  2625
state with !!/==>, only the conclusion is evaluated to True (if
wenzelm@30845
  2626
possible), avoiding strange error messages.
wenzelm@30845
  2627
wenzelm@30845
  2628
* Method "sizechange" automates termination proofs using (a
wenzelm@30845
  2629
modification of) the size-change principle.  Requires SAT solver.  See
wenzelm@30845
  2630
src/HOL/ex/Termination.thy for examples.
wenzelm@30845
  2631
wenzelm@30845
  2632
* Simplifier: simproc for let expressions now unfolds if bound
wenzelm@30845
  2633
variable occurs at most once in let expression body.  INCOMPATIBILITY.
wenzelm@30845
  2634
wenzelm@30845
  2635
* Method "arith": Linear arithmetic now ignores all inequalities when
wenzelm@30845
  2636
fast_arith_neq_limit is exceeded, instead of giving up entirely.
wenzelm@30845
  2637
wenzelm@30845
  2638
* New attribute "arith" for facts that should always be used
wenzelm@30845
  2639
automatically by arithmetic. It is intended to be used locally in
wenzelm@30845
  2640
proofs, e.g.
wenzelm@30845
  2641
wenzelm@30845
  2642
  assumes [arith]: "x > 0"
wenzelm@30845
  2643
nipkow@30706
  2644
Global usage is discouraged because of possible performance impact.
nipkow@30706
  2645
wenzelm@30845
  2646
* New classes "top" and "bot" with corresponding operations "top" and
wenzelm@30845
  2647
"bot" in theory Orderings; instantiation of class "complete_lattice"
wenzelm@30845
  2648
requires instantiation of classes "top" and "bot".  INCOMPATIBILITY.
wenzelm@30845
  2649
wenzelm@30845
  2650
* Changed definition lemma "less_fun_def" in order to provide an
wenzelm@30845
  2651
instance for preorders on functions; use lemma "less_le" instead.
wenzelm@30845
  2652
INCOMPATIBILITY.
wenzelm@30845
  2653
wenzelm@30845
  2654
* Theory Orderings: class "wellorder" moved here, with explicit