clarified iter_deepen_limit vs meson (cf. 7c5896919eb8) -- eliminated global ref;

disposed some old debugging tools;

proper configuration option "show_proofs"; modernized syntax translation;

structure Unsynchronized is never opened and set/reset/toggle have been discontinued; retain Unsynchronized.change alias for Proof General;

expanded some aliases from structure Unsynchronized;

merged, resolving some minor conflicts in src/HOL/Tools/Predicate_Compile/code_prolog.ML;

merged

formerly unnamed infix conjunction and disjunction now named HOL.conj and HOL.disj

tuned fact reference

merged

added support for yet another prolog system (yap); generate has only one option ensure_groundness; added one example of yap invocation in example theory

adapted examples; tuned

moving options; tuned

added generation of predicates for size-limited enumeration of values

NEWS

merged

formerly unnamed infix impliciation now named HOL.implies

merged

proper passing of optional module name

For sublocale it is sufficient to reconsider ancestors of the target.

only print qualified implicits

merged

stub for (later) correct deresolving of class method names

tuned serializer interface

private version of commas, cf. printmode

merged

merged

re-added accidental omission

tuned includes

prevent line breaks after Scala symbolic operators

corrected semantics of presentation_stmt_names; do not print includes on presentation selection

code_include Scala: qualify module nmae

merged

preliminary implementation of hierarchical module name space

tuned

proper context for various Thy_Output options, via official configuration options in ML and Isar;

Thy_Output: options based on proper context, although Thy_Output.add_wrapper still allows to maintain old-style wrapper combinators (setmp_CRITICAL etc.);

eliminated old 'local' command;

more uniform descriptions, which end up in the collective output of 'print_attributes' for example;

Fast_Lin_Arith.number_of: more conventional merge that prefers the left side -- note that former ordering wrt. serial numbers makes it depend on accidental load order;

slightly more abstract data handling in Fast_Lin_Arith;

theory data merge: prefer left side uniformly;

tuned;

simplification/standardization of some theory data;

misc tuning and simplification, notably theory data;

renamed Local_Theory.theory(_result) to Local_Theory.background_theory(_result) to emphasize that this belongs to the infrastructure and is rarely appropriate in user-space tools;

renamed ProofContext.theory(_result) to ProofContext.background_theory(_result) to emphasize that this belongs to the infrastructure and is rarely appropriate in user-space tools;

standardized Context.copy_thy to Theory.copy alias, with slightly more direct way of using it;

merged

merged

consider "locality" when assigning weights to facts

add a bonus for chained facts, since they are likely to be relevant; (especially in a Mirabelle run!) -- chained facts used to be included forcibly, then were treated as any other fact; the current approach seems more flexible

merged

add a penalty for lambda-abstractions; the penalty will kick in only when the goal contains no lambdas, in which case Sledgehammer previously totally disallowed any higher-order construct; this was too drastic; lambdas are dangerous because they rapidly lead to unsound proofs; e.g. COMBI_def COMBS_def not_Cons_self2 with explicit_apply

renaming

fiddle with relevance filter

update docs

reorganize options regarding to the relevance threshold and decay

make relevance filter work in term of a "max_relevant" option + use Vampire SOS; "max_relevant" is more reliable than "max_relevant_per_iter"; also made sure that the option is monotone -- larger values should lead to more axioms -- which wasn't always the case before; SOS for Vampire makes a difference of about 3% (i.e. 3% more proofs are found)

simplify more code