ChangeLog.concepts

   1 2013-11-012  Andrew Sutton  <andrew.n.sutton@gmail.com>
   2         * gcc/cp/parser.c (synthesize_implicit_template_parm): Allow concepts
   3         to declare implicit template parameters. Only synthesize new parameters
   4         if the concept name is new.
   5         (finish_concept_name): Moving into parser.c for the time being. Needs
   6         to be rewritten to remove duplicate code between parser.c and
   7         constraint.cc.
   8
   9 2013-11-012  Andrew Sutton  <andrew.n.sutton@gmail.com>
  10         * gcc/cp/pt.c (tsubst_copy): Expand pack expansions as conjunctions.
  11
  12 2013-11-012  Andrew Sutton  <andrew.n.sutton@gmail.com>
  13         * gcc/cp/pt.c (tsubst_pack_conjunction): Don't try to conjoin
  14         dependent expressions.
  15
  16 2013-11-012  Andrew Sutton  <andrew.n.sutton@gmail.com>
  17         * gcc/cp/semantics.c (fixup_template_type): Compare primary template
  18         types to specializations using structural types so we don't run into
  19         canonical type errors with constrained specializations.
  20
  21 2013-11-08  Andrew Sutton  <andrew.n.sutton@gmail.com>
  22         * gcc/cp/pt.c (add_inherited_template_parms): Instantiate requirements
  23         in a processing template decl context.
  24
  25 2013-11-05  Andrew Sutton  <andrew.n.sutton@gmail.com>
  26         * gcc/cp/semantics.c (fixup_template_type): Add a same-type check
  27         for specialiations so we don't accidentally match non-dependent
  28         specializations having a different type.
  29
  30 2013-10-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
  31         * gcc/cp/decl.c (grokdeclarator): Reject concept keyword
  32         in typedefs, function parameters, data members, non-static
  33         member functions and variables. Allow static member functions
  34         to be concepts.
  35
  36 2013-10-30  Andrew Sutton  <andrew.n.sutton@gmail.com>
  37         * gcc/cp/semantics.c (fixup_template_type): Don't emit errors when
  38         no templates can be found with matching constraints.
  39
  40 2013-10-25  Andrew Sutton  <andrew.n.sutton@gmail.com>
  41         * gcc/cp/parsre.c (cp_parser_requires_expression): Gracefully
  42         fail when parsing a requires expr outside a template.
  43
  44 2013-10-24  Andrew Sutton  <andrew.n.sutton@gmail.com>
  45         * gcc/cp/c-common.c (c_common_r): Remove unused keywords "assume",
  46         "axiom", and "forall".
  47         * gcc/cp/c-common.h (rid): Removed unused reserved word ids.
  48
  49 2013-10-24  Edward Smith-Rowland  <3dw4rd@verizon.net>
  50         * gcc/cp/typeck.c (cp_build_function_call_vec): Use unused variable
  51         loc.
  52
  53 2013-10-23  Andrew Sutton  <andrew.n.sutton@gmail.com>
  54         * gcc/cp/class.c (get_member_fntemplate): New.
  55         (are_constrained_member_overloads): Only get a template declaration
  56         if the member function is, in fact, a template or temploid.
  57         * gcc/cp/pt.c (check_explicit_specialization): Do not allow
  58         explicit specializations to be declared 'concept', and do not allow
  59         an explicit specialization of a concept.
  60         * gcc/cp/decl.c (grokfndecl): Propagate the concept flag to
  61         check_explicit_specialization.
  62
  63 2013-10-22  Andrew Sutton  <andrew.n.sutton@gmail.com>
  64         * gcc/c-family/c-common.c (cxx_dialect): Make the default
  65         language C++11.
  66         * gcc/cp/constraint.cc (check_constrained_friend): Don't assert
  67         on error_mark_node.
  68
  69 2013-10-16  Andrew Sutton  <andrew.n.sutton@gmail.com>
  70         * gcc/cp/logic.cc (left_requires), (decompose_left): Add
  71         decomposition rules for requires expressions.
  72         (subsumes_requires), (subsumes_prop): Add subsumption rules for
  73         requires expressions.
  74         * gcc/cp/constraint.cc (diagnose_trait): Diagnose failed conversion
  75         requirements.
  76
  77 2013-10-16  Andrew Sutton  <andrew.n.sutton@gmail.com>
  78         * gcc/cp/constraint.cc (finish_concept_name): Allow functions with
  79         the same name as concepts to resolve as call expressions in the
  80         usual way.
  81
  82 2013-10-16  Andrew Sutton  <andrew.n.sutton@gmail.com>
  83         * gcc/cp/constraint.cc (conjoin_requiremens): New.
  84         (resolve_constraint_check): Filter non-concept candidates before
  85         coercing arguments. Perform deduction in a template-decl processing
  86         context to prevent errors during diagnosis.
  87         (finish_concept_name), (finish_shorthand_requirement),
  88         (get_shorthand_requirements): New.
  89         * gcc/cp/pt.c (template_parm_to_arg): Make non-static.
  90         (process_templat_parm): Build shorthand requirements from the
  91         parameter description.
  92         (end_templat_parm_list): New.
  93         (convert_placeholder_argument): New.
  94         (convert_template_argument): Match placeholder arguments against
  95         any template parameter.
  96         (tsubst_pack_conjuction):  New.
  97         (tsubst_expr): Expand a pack as a conjunction.
  98         (type_dependent_expression_p): Placeholders are always type
  99         dependent.
 100         * gcc/cp/parser.c (cp_is_constrained_parameter),
 101         (cp_finish_template_type_parm), (cp_finish_template_template_parm)
 102         (cp_finish_non_type_template_parm), (cp_finish_constrined_parameter):
 103         New.
 104         (cp_parser_template_parameter): Handle constrained parameters.
 105         (cp_parser_nonclass_name): An identifier naming an overload set
 106         may declare a constrained parameter.
 107         (cp_parser_type_parameter), (cp_parser_template_declaration_after_exp):
 108         Get shorthand requirements from the tmeplate parameter list.
 109         * gcc/cp/cp-tree.h (TEMPLATE_PARM_CONSTRAINTS): New.
 110
 111 2013-10-07  Andrew Sutton  <andrew.n.sutton@gmail.com>
 112         * gcc/cp/cp-tree.h (check_constrained_friend): Take requirements as
 113         an argument.
 114         * gcc/cp/constraints.cc (check_constrained_friend): Do not diagnose
 115         errors in unconstrained friend declarations.
 116         * gcc/cp/parser.cc (cp_parser_member_declaration): Pass current
 117         requirements to check_constrained_friend.
 118
 119 2013-10-07  Andrew Sutton  <andrew.n.sutton@gmail.com>
 120         * gcc/cp/parser.c (cp_parser_member_declaration): Check that
 121         a constrained friend definition is valid.
 122         * gcc/cp/decl.c (grokfndecl): Disallow constrained friend template
 123         specializations.
 124         * gcc/cp/constraints.cc (check_constrained_friend): New.
 125         * gcc/cp/typeck.c (cp_build_function_call_vec): Diagnose constraints
 126         in the presence of the failure of a single candidate.
 127         * gcc/cp/cp-tree.h (check_constrained_friend): New.
 128         * gcc/cp/call.c (is_non_template_member_fn): Make inline.
 129         (is_non_template_friend), (is_constrainable_non_template_fn): New.
 130         (add_function_candidate): Predicate check on
 131         is_constrainable_non_template_fn.
 132
 133 2013-09-10  Andrew Sutton  <andrew.n.sutton@gmail.com>
 134         * gcc/cp/cp-tree.h (TEMPLATE_PARMS_CONSTRAINTS): New.
 135         * gcc/cp/parser.c (cp_parser_template_declaration_after_export),
 136         (cp_parser_type_parameter): Use TEMPLATE_PARMS_CONSTRAINTS.
 137         * gcc/cp/semantics.c (fixup_template_scope): Use
 138         TEMPLATE_PARMS_CONSTRAINTS.
 139
 140 2013-09-11  Andrew Sutton  <andrew.n.sutton@gmail.com>
 141         * gcc/cp/cxx-pretty-print.c (pp_cxx_compound_requirement),
 142         (pp_cxx_type_requirement), (pp_cxx_validtype_expr): Use
 143         pp->type_id() instead of pp_cxx_type_id().
 144
 145 2013-09-09  Andrew Sutton  <andrew.n.sutton@gmail.com>
 146         * gcc/cp/pt.c (get_class_bindings): Pass the partial specialization
 147         for constraint evaluation. Evaluate constraints, resulting in
 148         deduction failure on error.
 149         (get_specializaing_template_decl), (get_specialization_constraints),
 150         (maybe_new_partial_specialization): New.
 151         (maybe_process_partial_specialization): Allow the creation of
 152         new types for constrained partial specializations.
 153         (process_partial_specialization): Modify the canonical type
 154         of constrained partial specializations.
 155         (instantiate_class_template_1): Do not explicitly check constraints
 156         during class template instantiation.
 157         (tsubst_decl): Instantiate the constraints of template declarations.
 158         (more_specialized_class): Pass specializations to get_class_bindings().
 159         Compare specialization constraints if the types are equivalent.
 160         (most_specialized_class): Pass specialization to get_class_bndings().
 161         * gcc/cp/decl2.c (check_class_fn): Get the decl's requirements from
 162         either the current template reqs or from the template parameters.
 163         Allow overloading of constrained out-of-class member definitions.
 164         * gcc/cp/semantics.c (fixup_template_type): New. Match the template
 165         scope to a specialization with appropriate constraints.
 166         (finish_template_type): Fix template type when entering scope.
 167         * gcc/cp/parser.c (cp_parser_parse_type_parameter): Attach
 168         requirements to the current template parameter list.
 169         (cp_parser_init_declarator): Parse requires clauses for out-of-class
 170         member definitions. Be sure to restore current constraints before
 171         exiting the function.
 172         (cp_parser_member_declarator): Restore the previous requirements in
 173         an early-exit branch.
 174         (cp_parser_late_parsing_for_member): Restore constraints after
 175         maybe_end_member_template_processing().
 176         (cp_parser_template_declaration_after_exp): Attach constraints to
 177         the current template parameters.
 178         * gcc/cp/constraint.cc (reduce_template_id): Don't crash when
 179         omitting ()'s on constraint calls.
 180         (check_requirements): Don't evaluate dependent arguments.
 181         (check_constraints): Don't try to evaluate when arguments are
 182         dependent.
 183         (equivalent_constraints): Optimize the case when a and b are the
 184         same constraints.
 185
 186 2013-07-26  Andrew Sutton  <andrew.n.sutton@gmail.com>
 187         * gcc/cp/semantics.c (trait_expr_value): Evaluate __is_same_as.
 188         (finish_trait_expr): Check __is_same_as and __is_convertible_to.
 189         * gcc/cp/constraint.cc (diagnose_trait): Diagnose failures in
 190         __is_same_as.
 191         * gcc/cp/parser.c (cp_parser_primary_expression),
 192         (cp_parser_trait_expr): Parse __is_same_as.
 193         * gcc/cp/cp-tree.h (cp_trait_kind): Add CPTK_IS_SAME_AS.
 194         * gcc/cp/cxx-pretty-print.c (pp_cxx_trait_expression): Pretty print
 195         __is_same_as trait.
 196
 197 2013-07-26  Andrew Sutton  <andrew.n.sutton@gmail.com>
 198         * gcc/cp/tree.c (cp_walk_subtrees): Don't recurse through the
 199         requires expr parameter list.
 200
 201 2013-07-25  Andrew Sutton  <andrew.n.sutton@gmail.com>
 202         * gcc/cp/parser.c (cp_parser_requires_expr): Update parser using new
 203         requires expression nodes. Renamed some grammar productions to better
 204         reflect the representation of the syntax. Create a new scope for
 205         requires parameters.
 206         (cp_parser_nested_requirement): Wrap results in a NESTED_REQ node.
 207         * gcc/cp/semantics.c (xvalue_result_type): New.
 208         (trait_expr_value): Evaluate __is_convertible_to.
 209         (finish_requires_expr): Implemented, along with other functions to
 210         construct and evaluate nodes for template constraints.
 211         (potential_constant_expression_1): Handle requires expressions.
 212         (finish_template_requirements), (finish_requires_expr), etc:
 213         Move to constraint.cc.
 214         * gcc/cp/cp-tree.def: (REQUIRES_EXPR), (EXPR_REQ), (TYPE_REQ),
 215         (NESTED_REQ), (VALIDEXPR_EXPR), (VALIDTYPE_EXPR), (CONSTEXPR_EXPR):
 216         New.
 217         * gcc/cp/cp-objcp-common.c (cp_common_init_ts): Make new nodes typed.
 218         * gcc/cp/cp-tree.h (finish_expr_requirement),
 219         (finish_type_requirement), (finish_nested_requirement),
 220         (finish_validexpr_expr), (finish_validtype_expr),
 221         (finish_constexpr_expr): New.
 222         * gcc/cp/pt.c (convert_nontype_argument): Use can_convert_standard.
 223         (retrieve_local_specialization), (register_local_specialization),
 224         (extract_fnparm_pack): Make non-static.
 225         (tsubst_expr): Substitution rules for requires expressions.
 226         (instantiate_requirements): Move to constraints.cc
 227         (tsubst_constraint): Remove.
 228         * gcc/cp/call.c (can_convert): Allow user-defined conversions.
 229         (can_convert_standard): New.
 230         * gcc/cp/cvt.c (convert_to_reference): Use can_convert_standard.
 231         * gcc/cp/search.c (check_final_overrider): Use can_cnvert_standard.
 232         * gcc/cp/typeck.c (build_static_cast_1): Use can_convert_standard.
 233         * gcc/cp/error.c (dump_expr): Pretty print new nodes.
 234         * gcc/cp/cxx-pretty-print.c (pp_cxx_primary_expression): Pretty
 235         print new expr/req nodes.
 236         (pp_cxx_requires_expr): New along with related functions for
 237         pretty printing requirements.
 238         (pp_cxx_parameter_declaration_clause): Accommodate "raw" parameter
 239         lists in addition to function decls.
 240         (pp_cxx_requirement_parameter_list): Unified with parameter decl clause.
 241         * gcc/cp/cxx-pretty-print.h (pp_cxx_requires_expr): New along with
 242         related functions for pretty printing requirements.
 243         * gcc/cp/logic.cc: Move header comments to top of file.
 244         * gcc/cp/constraint.cc (reduce_requirements): Handle requires
 245         expressions.
 246         (diagnose_constraints): Rename and handle requires expressions.
 247
 248 2013-07-01  Andrew Sutton  <andrew.n.sutton@gmail.com>
 249         * gcc/cp/error.c (cp_printer): Fix unnecessary whitespace change.
 250         * gcc/cp/constraint.cc (diagnose_node): Don't fail diagnosing
 251         disjunctions.
 252
 253 2013-07-01  Andrew Sutton  <andrew.n.sutton@gmail.com>
 254         * gcc/cp/class.c (are_constrained_member_overloads): Fix doc typos.
 255
 256 2013-06-24  Andrew Sutton  <andrew.n.sutton@gmail.com>
 257         * gcc/cp/parser.c (cp_parser_init_declarator): Parse template
 258         requirements for out-of-class member definitions.
 259         * gcc/cp/decl2.c (check_classfn): Include match out-of-class
 260         definitions using constraints.
 261         * gcc/cp/constraint.cc (equivalently_constrained). Use get_constraints.
 262         (more_constrained). Use get_constraints.
 263
 264 2013-06-24  Andrew Sutton  <andrew.n.sutton@gmail.com>
 265         * gcc/cp/cp-tree.h (tree_template_info). Remove constraint from
 266         template info.
 267         (check_template_info): Removed (unused).
 268         (TI_CONSTRAINT): Removed (no longer needed) along with related macros.
 269         (DECL_CONSTRAINTS): New. Get constraints from DECL_SIZE_UNIT for
 270         template decls.
 271         (build_template_info): Removed overload taking constraints.
 272         (get_constraints): Removed (no longer needed).
 273         * gcc/cp/class.c (are_constrained_member_overlaods): Allow constrained
 274         member function templates to be differentiated as overloads.
 275         * gcc/cp/decl.c (decls_match): Only compare constraints on
 276         declarations.
 277         (grokfndecl): Don't pass constraints to build_template_info.
 278         * gcc/cp/tree.c (bind_template_template_parm): Don't pass constraints
 279         to build_template_info.
 280         * gcc/cp/pt.c (build_template_info): Removed overload taking
 281         constraints.
 282         (check_explicit_specialization): Don't build new constraints for
 283         template info.
 284         (build_template_decl): Pass constraints. Update docs.
 285         (process_partial_specialization): Stub out support for constrained
 286         partial specialiations.
 287         (push_template_decl_real): Build template decls with current template
 288         reqs. Don't pass constraints to build_template_info.
 289         (add_inherited_template_parms): Build new constraints from inherited
 290         template constructors.
 291         (redeclare_class_template): Update to new constraint interface.
 292         (is_compatible_template_arg): Update to new constraint interface.
 293         (lookup_template_class_1): Don't build new constraints or pass them to
 294         build_template_info.
 295         (instantiate_class_template_1): Update to new constraints interface.
 296         (tsubst_decl): Don't build new constraints or pass them to
 297         build_template_info. For function templates, explicitly instantiate
 298         new constraints for member functions of class templates.
 299         * gcc/cp/semantics.c: Associate constraints with template template
 300         parms directly, not through template info.
 301         * gcc/cp/constraint.cc (get_constraints): Simplified to use new constraints
 302         interface.
 303         (check_constraints): Update to use new constraints interface.
 304         (equivalently_constrained): Update to use new constraints interface.
 305         (more_constrained): Update to use new constraints interface.
 306         * gcc/cp/parser.cpp (cp_parser_late_parsing_for_member): Update to use
 307         new constraints interface.
 308         * gcc/cp/call.c (is_non_template_member_fn): New.
 309         (add_function_candidate): Only check constraints for non-template member
 310         functions.
 311
 312 2013-06-21  Andrew Sutton  <andrew.n.sutton@gmail.com>
 313         * gcc/cp/parser.c (cp_parser_requires_clause): Pulled out of
 314         cp_parser_requires_clause_opt for reuse in the requires expr parser.
 315         (cp_parser_requires_expression): New, along with a family of
 316         sub-expression parsers for the new feature.
 317         * gcc/cp/semantics.c (finish_requires_expr): Stub.
 318         (finish_syntax_requirement): Stub.
 319         (finish_type_requirement): Stub.
 320         (finish_constexpr_requirement): Stub.
 321         (finish_noexcept_requirement): Stub.
 322         (finish_requires_expr): Stub.
 323         * gcc/cp/cp-tree.h: (finish_requires_expr): New.
 324         (finish_syntax_requirement): New.
 325         (finsih_type_requirement): New.
 326         (finish_constexpr_requirement): New.
 327         (finish_noexcept_requirement): New.
 328
 329 2013-06-21  Andrew Sutton  <andrew.n.sutton@gmail.com>
 330         * gcc/cp/error.c (subst_to_string): Allow this to be called explicitly
 331         passing template parameters in the TREE_TYPE and with a null
 332         TREE_PURPOSE.
 333         * constraint.cc (check_requirements): New overload taking template
 334         arguments.
 335         (check_constraints.cc): Move instantiation and checking into the
 336         new check_requirements overload.
 337         (diagnose_requirements): New family of functions for diagnosing
 338         constraint failures.
 339
 340 2013-06-18  Andrew Sutton  <andrew.n.sutton@gmail.com>
 341         * gcc/cp/class.c (are_constrained_member_overloads): New.
 342         (add_method): Allow overloading of constrained member functions.
 343         * gcc/cp/call.c (rejection_reason_code): New rr_constraint_failure.
 344         (template_constraint_failure): New.
 345         (add_function_candidate): Check for viability as a precondition to use.
 346         (add_template_candidate_real): Integrate constraint diagnostics.
 347         Provide constraint info for new template instantiations.
 348         (print_z_candidate): Emit diagnostics for constraint failures.
 349         (template_decl_for_candidate): New.
 350         (joust): Allow non-member templates of class templates to be evaluated
 351         in more_specialized_fn if they are constrained.
 352         * gcc/cp/ptree.c (cxx_print_xnode): Dump constraint info.
 353         * gcc/cp/semantics.c (finish_template_template_parm): Build template
 354         info for template template parameters.
 355         (is_unary_trait): New.
 356         (is_binary_trait): New.
 357         (finish_trait_expr): Check for binary traits using new function.
 358         * gcc/cp/constraint.cc (join_requirements): New
 359         (conjoin_requirements): Join expressions correctly. Fixed docs.
 360         (disjoin_requirements): Removed.
 361         (is_constriant): Removed.
 362         (resolve_constraint_check): New. Replaces previous get_constraint
 363         check and related functions.
 364         (get_constraints): New, along with helper functions.
 365         (suppress_template_processing): New.
 366         (check_template_constraints): New, along with helper functions.
 367         (equivalent_constraints): New.
 368         (equivalently_constrained): New.
 369         (more_constraints): New.
 370         (more_constrianed): New.
 371         (diagnose_constraint_failure): New.
 372         * gcc/cp/decl.c (decls_match): Check for constraint equivalence if
 373         the types are the same.
 374         (check_concept_refinement): New.
 375         (are_constrained_overloads): New.
 376         (duplicate_decls): Handle constraints for ambigous declarations. Check
 377         and diagnose concept refinement.
 378         (check_concept_fn): Don't fail completely just because the concept
 379         isn't defined correctly. Allow analysis to continue as if declared
 380         constexpr. Concepts must return bool.
 381         * gcc/cp/tree.c (bind_template_template_parm): Provide empty
 382         constraints for bound template template parameters.
 383         * gcc/cp/logic.cc: Rewrite of proof state and related structures and
 384         decomposition logic. Removed right-decomposition logic, but retained
 385         right-logical rules.
 386         (match_terms): Renamed from entails.
 387         (subsumes_prop): Cleanup, added specific handlers for and/or cases.
 388         (subsumes_constraints): Update from interface change.
 389         * gcc/cp/cp-tree.h (check_constraint_info): Renamed and applied
 390         interface change.
 391         (check_template_info): Renamed and applied interface change.
 392         (cp_unevaluated): New
 393         (local_specialization_stack): New.
 394         (coerce_template_parms): New.
 395         (is_unary_trait): New.
 396         (is_binary_trait): New.
 397         (get_constraints): New.
 398         (check_constraints): New.
 399         (check_template_constraints): New.
 400         (subst_template_constraints): New.
 401         (equivalent_constraints): New.
 402         (equivalently_constrained): New.
 403         (more_constraints): New.
 404         (more_constrained): New.
 405         (diagnose_constraints_failure): New.
 406         * gcc/cp/cxx-pretty-print.c (pp_cxx_template_declaration): Print the
 407         template requirements.
 408         * gcc/cp/pt.c (local_specialization_stack): New.
 409         (build_template_info): Refactor into 3-argument version and
 410         incorporate template requirements.
 411         (check_explicit_specialization): Instantiate requirements for
 412         template info.
 413         (push_template_decl_real): Include constraints in template info.
 414         (redeclare_class_template): Diagnose redeclaration with different
 415         constraints.
 416         (is_compatible_template_arg): New.
 417         (convert_template_argument): Check constraints on template template
 418         arguments and diagnose errors.
 419         (lookup_template_class_1): Check constraints on alias templates.
 420         Keep constraints with instantiated types.
 421         (instantiate_class_template_1): Check constraints on class templates.
 422         (tsubst_decl): Instantiate and keep constraints with template info.
 423         Also, allow dependent pack arguments to produce neww parameter
 424         packs when instantiated.
 425         (coerce_template_parms): New overload.
 426         (tsubst_copy): Handle REAL_TYPE and BOOLEAN_TYPE.
 427         (tsubst_copy_and_build): PARM_DECLs can be instantiated as pack
 428         expansions (used with requires expression).
 429         (fn_type_unification): Check constraints for function templates.
 430         (more_specialized_fn): Determine which candidate is more constrained.
 431         (substitute_template_parameters): Removed.
 432         (tsubst_constraint): New.
 433         (substitute_requirements): New.
 434         * gcc/cp/parser.c: (cp_parser_optional) Removed along with helper
 435         functions, etc.
 436         (cp_unevaluated): New.
 437         (cp_parser_type_parameter): Check for requires kw explicitly, and
 438         save/clear template requirements before parsing the requires clause.
 439         (cp_parser_requires_clause): Removed.
 440         (cp_parser_template_declaration_after_exp): Check for requires kw
 441         explicitly.
 442         * gcc/system.h (cstdlib): Removed include.
 443         * gcc/c-family/c-common.h (D_CXX_CONCEPTS): New flag for disabling
 444         concept keywords.
 445         * gcc/c-family/c.opt (flag_concepts): Remove redundant declaration.
 446         * gcc/c-family/c-common.c (c_common_r): Concept-specific keywords
 447         are only enabled when concepts are enabled.
 448
 449 2013-06-01  Andrew Sutton  <andrew.n.sutton@gmail.com>
 450         * gcc/system.h (cstdlib): Include <cstdlib> to avoid poisoned
 451         declaration errors.
 452         * gcc/c-family/common.c (c_common_r): Added __is_same_as intrinsic,
 453         removed previous, unused intrinsics.
 454         * gcc/c-family/common.h (rid): Added RID_IS_SAME_AS.
 455         * gcc/cp/parser.c (take): New.
 456         (cp_requires_clause): New.
 457         (cp_requires_clause_opt): New.
 458         (cp_rule): New.
 459         (cp_parser_optional_if_token): New.
 460         (cp_parser_optional_if_not_token): New.
 461         (cp_parser_optional_if_keyword): New.
 462         (cp_parser_decl_specifier_seq): Parse 'concept' as a declspec.
 463         (cp_parser_type_parameter): Parse constrained template template parms.
 464         (cp_parser_member_specification_opt): Parse member constraints after
 465         the declaration, not before.
 466         (cp_parser_template_declaration_after_exp): Rewrote parsing for
 467         template requirements
 468         (cp_parser_late_parsing_for_member): Re-push the current template
 469         requirements when late-parsing member definitions.
 470         * gcc/cp/decl.c (check_concept_fn): New.
 471         (grokfndecl): Semantics for concept declspec.
 472         (grokdeclarator): Semantics for concept declspec.
 473         (xref_tag_1): Update to new interface.
 474         * gcc/cp/constraint.cc (make_constraints): New.
 475         * gcc/cp/cp-objcp-common.c (cp_tree_size): Add case for constraint_info.
 476         * gcc/cp/cp-tree.h (require): New.
 477         (tree_template_info): Add a field for constraint info.
 478         (tree_constraint_info): New.
 479         (constraint_info_p): New.
 480         (template_info_p): New.
 481         (CI_SPELLING): New.
 482         (CI_REQUIREMENTS): New.
 483         (CI_ASSUMPTIONS): New.
 484         (TI_CONSTRAINT): New.
 485         (TI_SPELLING): New.
 486         (TI_REQUIREMENTS): New.
 487         (TI_ASSUMPTIONS): New.
 488         (DECL_TEMPLATE_CONSTRAINT): New.
 489         (CLASSTYPE_TEMPLATE_CONSTRAINT): New.
 490         (ENUM_TEMPLATE_CONSTRAINT): New.
 491         (TEMPLATE_TEMPLATE_PARM_TEMPLATE_CONSTRAINT): New.
 492         (TYPE_TEMPLATE_CONSTRAINT): New.
 493         (cp_tree_node_structure_enum): Added entry for constraint info.
 494         (lang_tree_node): Added entry for constraint info.
 495         (lang_decl_base): Added bit for concept declarations.
 496         (DECL_DECLARED_CONCEPT_P): New.
 497         (cp_decl_spec): Added ds_concept declaration specifier.
 498         * gcc/cp/Make-lang.in (logic.o): New target.
 499         * gcc/cp/semantics.c (finish_template_requirements): Rewrite.
 500         * gcc/cp/logic.cc: New
 501         * gcc/cp-tree.def (CONSTRAINT_INFO): New node.
 502         * gcc/cp/pt.c (current_template_args): Make non-static.
 503         (redeclare_class_template): Take constraints as a 3rd argument
 504
 505 2013-04-01  Andrew Sutton  <andrew.n.sutton@gmail.com>
 506
 507         * gcc/cp/Make-lang.in: Add constraints.o target.
 508         * gcc/cp/cp-tree.h (substitute_template_parameters): Declare.
 509         (instantiate_requirements): Declare.
 510         (conjoin_requirements): Declare.
 511         (disjoin_requirements): Declare.
 512         (reduce_requirements): Declare.
 513         * gcc/cp/pt.c (substitute_template_parameters): Define.
 514         (instantiate_requirements): Define.
 515         * gcc/cp/pt.c (finish_template_requirements): Call
 516         reduce_requirements to get constraints.
 517         * gcc/cp/parser.c (cp_parser_type_parameter): Restore saved
 518         constraints after parsing template template parameter decl.
 519         * gcc/cp/constraints.cc: New.
 520
 521 2013-03-11  Andrew Sutton  <andrew.n.sutton@gmail.com>
 522         * gcc/cp/Make-lang.in: Add constraint.c
 523         * gcc/cp/constraint.c: New
 524         (conjoin_requirements): New
 525         (disjoin_requirements): New
 526         (requirement_reduction): New class
 527         (reduce_requirements): New
 528         * gcc/cp/cp-tree.h (reduce_requrements): New
 529         (conjoin_requirements): New
 530         (disjoin_requirements): New
 531         * gcc/cp/cp-tree.h (finish_template_template_parm) Comments.
 532         * gcc/cp/semantics.c (finish_template_requirements) Start
 533         working with requirements.
 534
 535
 536 2013-03-01  Andrew Sutton  <andrew.n.sutton@gmail.com>
 537
 538         * gcc/cp/cp-tree.h (saved_scope): Add template requirements.
 539         (finish_template_requirements): Declare
 540         * gcc/cp/parser.c (cp_parser_template_requirement_opt): Declare.
 541         (cp_parser_template_declaration): Document grammar extensions.
 542         (cp_parser_type_parameter): Parse requirements for template
 543         template parameters.
 544         (cp_parser_member_declaration): Parse requirements for
 545         members of class templates.
 546         (cp_parser_template_requirement_opt): Define.
 547         (cp_parser_template_declaration_after_exp): Parse requirements
 548         for template declarations.
 549         * gcc/cp/semantics.c (finish_template_requirements): Define.
 550         * gcc/cp/lex.c (cxx_init): Enable concepts by default.
 551
 552 2013-03-01  Gabriel Dos Reis  <gdr@integrable-solutions.net>
 553
 554         * lex.c (flag_concepts): Revert left over declaration.
 555
 556 2013-03-01  Gabriel Dos Reis  <gdr@integrable-solutions.net>
 557
 558         * gcc/c-family/c-common.c (cxx_dialect): Set C++11 as default.
 559         * gcc/c-family/c.opt(flag_concepts): Add.
 560         * gcc/cp/lex.c (flag_concepts): New.  Enabled concept support by
 561         default.
 562
 563 2013-02-28  Andrew Sutton  <andrew.n.sutton@gmail.com>
 564
 565         * gcc/c-family/c-common.h (rid): New resreserved words for concepts.
 566         * gcc/c-family/c-common.c (c_common_reswords): Definitions thereof.
 567         * gcc/doc/extend.texi (write_symbol): Initial concept docs.