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This patch goes through all .cc files in gcc/cp and adds in any
auto_diagnostic_groups that seem to be missing by looking for any
'inform' calls that aren't grouped with their respective error/warning.
Now with SARIF output support this seems to be a bit more important.
The patch isn't complete; I've tried to also track helper functions used
for diagnostics to group them, but some may have been missed.
Additionally there are a few functions that are definitely missing
groupings but I wasn't able to see an obvious way to add them without
potentially grouping together unrelated messages.
This list includes:
- lazy_load_{binding,pendings} "during load of {binding,pendings} for"
- cp_finish_decomp "in initialization of structured binding variable"
- require_deduced_type "using __builtin_source_location"
- convert_nontype_argument "in template argument for type %qT"
- coerce_template_params "so any instantiation with a non-empty parameter pack"
- tsubst_default_argument "when instantiating default argument"
- invalid_nontype_parm_type_p "invalid template non-type parameter"
gcc/cp/ChangeLog:
* class.cc (add_method): Add missing auto_diagnostic_group.
(handle_using_decl): Likewise.
(maybe_warn_about_overly_private_class): Likewise.
(check_field_decl): Likewise.
(check_field_decls): Likewise.
(resolve_address_of_overloaded_function): Likewise.
(note_name_declared_in_class): Likewise.
* constraint.cc (associate_classtype_constraints): Likewise.
(diagnose_trait_expr): Clean up whitespace.
* coroutines.cc (find_coro_traits_template_decl): Add missing
auto_diagnostic_group.
(coro_promise_type_found_p): Likewise.
(coro_diagnose_throwing_fn): Likewise.
* cvt.cc (build_expr_type_conversion): Likewise.
* decl.cc (validate_constexpr_redeclaration): Likewise.
(duplicate_function_template_decls): Likewise.
(duplicate_decls): Likewise.
(lookup_label_1): Likewise.
(check_previous_goto_1): Likewise.
(check_goto_1): Likewise.
(make_typename_type): Likewise.
(make_unbound_class_template): Likewise.
(check_tag_decl): Likewise.
(start_decl): Likewise.
(maybe_commonize_var): Likewise.
(check_for_uninitialized_const_var): Likewise.
(reshape_init_class): Likewise.
(check_initializer): Likewise.
(cp_finish_decl): Likewise.
(find_decomp_class_base): Likewise.
(cp_finish_decomp): Likewise.
(expand_static_init): Likewise.
(grokfndecl): Likewise.
(grokdeclarator): Likewise.
(check_elaborated_type_specifier): Likewise.
(lookup_and_check_tag): Likewise.
(xref_tag): Likewise.
(cxx_simulate_enum_decl): Likewise.
(finish_function): Likewise.
* decl2.cc (check_classfn): Likewise.
(record_mangling): Likewise.
(mark_used): Likewise.
* error.cc (qualified_name_lookup_error): Likewise.
* except.cc (build_throw): Likewise.
* init.cc (get_nsdmi): Likewise.
(diagnose_uninitialized_cst_or_ref_member_1): Likewise.
(warn_placement_new_too_small): Likewise.
(build_new_1): Likewise.
(build_vec_delete_1): Likewise.
(build_delete): Likewise.
* lambda.cc (add_capture): Likewise.
(add_default_capture): Likewise.
* lex.cc (unqualified_fn_lookup_error): Likewise.
* method.cc (synthesize_method): Likewise.
(defaulted_late_check): Likewise.
* module.cc (trees_in::is_matching_decl): Likewise.
(trees_in::read_enum_def): Likewise.
(module_state::check_not_purview): Likewise.
(module_state::deferred_macro): Likewise.
(module_state::read_config): Likewise.
(module_state::check_read): Likewise.
(declare_module): Likewise.
(init_modules): Likewise.
* name-lookup.cc (diagnose_name_conflict): Likewise.
(lookup_using_decl): Likewise.
(set_decl_namespace): Likewise.
(finish_using_directive): Likewise.
(push_namespace): Likewise.
(add_imported_namespace): Likewise.
* parser.cc (cp_parser_check_for_definition_in_return_type): Likewise.
(cp_parser_userdef_numeric_literal): Likewise.
(cp_parser_nested_name_specifier_opt): Likewise.
(cp_parser_new_expression): Likewise.
(cp_parser_binary_expression): Likewise.
(cp_parser_lambda_introducer): Likewise.
(cp_parser_module_declaration): Likewise.
(cp_parser_import_declaration): Likewise, removing gotos to
support this.
(cp_parser_declaration): Add missing auto_diagnostic_group.
(cp_parser_decl_specifier_seq): Likewise.
(cp_parser_template_id): Likewise.
(cp_parser_template_name): Likewise.
(cp_parser_explicit_specialization): Likewise.
(cp_parser_placeholder_type_specifier): Likewise.
(cp_parser_elaborated_type_specifier): Likewise.
(cp_parser_enum_specifier): Likewise.
(cp_parser_asm_definition): Likewise.
(cp_parser_init_declarator): Likewise.
(cp_parser_direct_declarator): Likewise.
(cp_parser_class_head): Likewise.
(cp_parser_member_declaration): Likewise.
(cp_parser_lookup_name): Likewise.
(cp_parser_explicit_template_declaration): Likewise.
(cp_parser_check_class_key): Likewise.
* pt.cc (maybe_process_partial_specialization): Likewise.
(determine_specialization): Likewise.
(check_for_bare_parameter_packs): Likewise.
(check_template_shadow): Likewise.
(process_partial_specialization): Likewise.
(push_template_decl): Likewise.
(redeclare_class_template): Likewise.
(convert_nontype_argument_function): Likewise.
(check_valid_ptrmem_cst_expr): Likewise.
(convert_nontype_argument): Likewise.
(convert_template_argument): Likewise.
(coerce_template_parms): Likewise.
(tsubst_qualified_id): Likewise.
(tsubst_expr): Likewise.
(most_specialized_partial_spec): Likewise.
(do_class_deduction): Likewise.
(do_auto_deduction): Likewise.
* search.cc (lookup_member): Likewise.
* semantics.cc (finish_non_static_data_member): Likewise.
(process_outer_var_ref): Likewise.
(finish_id_expression_1): Likewise.
(finish_offsetof): Likewise.
(omp_reduction_lookup): Likewise.
(finish_omp_clauses): Likewise.
* tree.cc (check_abi_tag_redeclaration): Likewise.
(check_abi_tag_args): Likewise.
* typeck.cc (invalid_nonstatic_memfn_p): Likewise.
(complain_about_unrecognized_member): Likewise.
(finish_class_member_access_expr): Likewise.
(error_args_num): Likewise.
(warn_for_null_address): Likewise.
(cp_build_binary_op): Likewise.
(build_x_unary_op): Likewise.
(cp_build_unary_op): Likewise.
(build_static_cast): Likewise.
(cp_build_modify_expr): Likewise.
(get_delta_difference): Likewise.
(convert_for_assignment): Widen scope of auto_diagnostic_group.
(check_return_expr): Add missing auto_diagnostic_group.
* typeck2.cc (cxx_incomplete_type_diagnostic): Likewise.
Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
Reviewed-by: Marek Polacek <polacek@redhat.com>
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This patch removes vestigial Concepts TS code as discussed in
<https://gcc.gnu.org/pipermail/gcc-patches/2024-July/657937.html>.
In particular, it removes code related to function/variable concepts.
That includes variable_concept_p and function_concept_p, which then
cascades into removing DECL_DECLARED_CONCEPT_P etc. So I think we
no longer need to say "standard concept" since there are no non-standard
ones anymore.
I've added two new errors saying that "variable/function concepts are
no longer supported".
gcc/cp/ChangeLog:
* constexpr.cc (cxx_eval_constant_expression): Don't call
unpack_concept_check. Add a concept_check_p assert. Remove
function_concept_p code.
* constraint.cc (check_constraint_atom): Remove function concepts code.
(unpack_concept_check): Remove.
(get_concept_check_template): Remove Concepts TS code.
(resolve_function_concept_overload): Remove.
(resolve_function_concept_check): Remove.
(resolve_concept_check): Remove Concepts TS code.
(get_returned_expression): Remove.
(get_variable_initializer): Remove.
(get_concept_definition): Remove Concepts TS code.
(normalize_concept_check): Likewise.
(build_function_check): Remove.
(build_variable_check): Remove.
(build_standard_check): Use concept_definition_p instead of
standard_concept_p.
(build_concept_check): Remove variable_concept_p/function_concept_p
code.
(build_concept_id): Simplify.
(build_type_constraint): Likewise.
(placeholder_extract_concept_and_args): Likewise.
(satisfy_nondeclaration_constraints): Likewise.
(check_function_concept): Remove.
(get_constraint_error_location): Remove Concepts TS code.
* cp-tree.h (DECL_DECLARED_CONCEPT_P): Remove.
(check_function_concept): Remove.
(unpack_concept_check): Remove.
(standard_concept_p): Remove.
(variable_concept_p): Remove.
(function_concept_p): Remove.
(concept_definition_p): Simplify.
(concept_check_p): Don't check for CALL_EXPR.
* decl.cc (check_concept_refinement): Remove.
(duplicate_decls): Remove check_concept_refinement code.
(is_concept_var): Remove.
(cp_finish_decl): Remove is_concept_var.
(check_concept_fn): Remove.
(grokfndecl): Give an error about function concepts not being supported
anymore. Remove unused code.
(grokvardecl): Give an error about variable concepts not being
supported anymore.
(finish_function): Remove DECL_DECLARED_CONCEPT_P code.
* decl2.cc (min_vis_expr_r): Use concept_definition_p instead of
standard_concept_p.
(maybe_instantiate_decl): Remove DECL_DECLARED_CONCEPT_P check.
(mark_used): Likewise.
* error.cc (dump_simple_decl): Use concept_definition_p instead of
standard_concept_p.
(dump_function_decl): Remove DECL_DECLARED_CONCEPT_P code.
(print_concept_check_info): Don't call unpack_concept_check. Simplify.
* mangle.cc (write_type_constraint): Likewise.
* parser.cc (cp_parser_nested_name_specifier_opt): Remove
function_concept_p code. Only check concept_definition_p, not
variable_concept_p/standard_concept_p.
(add_debug_begin_stmt): Remove DECL_DECLARED_CONCEPT_P code.
(cp_parser_template_declaration_after_parameters): Remove a stale
comment.
* pt.cc (check_explicit_specialization): Remove
DECL_DECLARED_CONCEPT_P code.
(process_partial_specialization): Remove variable_concept_p code.
(lookup_template_variable): Likewise.
(tsubst_expr) <case CALL_EXPR>: Remove Concepts TS code and simplify.
(do_decl_instantiation): Remove DECL_DECLARED_CONCEPT_P code.
(instantiate_decl): Likewise.
(placeholder_type_constraint_dependent_p): Don't call
unpack_concept_check. Add a concept_check_p assert.
(convert_generic_types_to_packs): Likewise.
* semantics.cc (finish_call_expr): Remove Concepts TS code and simplify.
gcc/testsuite/ChangeLog:
* g++.dg/concepts/decl-diagnose.C: Adjust dg-error.
* g++.dg/concepts/fn-concept2.C: Likewise.
* g++.dg/concepts/pr71128.C: Likewise.
* g++.dg/concepts/var-concept6.C: Likewise.
* g++.dg/cpp2a/concepts.C: Likewise.
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When playing with P2963R3, while reading and/or modifying code I've fixed
various comment or code formatting issues (and in 3 spots also comment
wording), but including that in the WIP P2963R3 patch made that patch
totally unreadable because these changes were 4 times the size of the
actual code changes.
So, here it is separated to a pure formatting + comment wording patch.
2024-07-24 Jakub Jelinek <jakub@redhat.com>
* constraint.cc (subst_info::quiet, subst_info::noisy): Formatting
fixes.
(known_non_bool_p): Comment formatting fixes.
(unpack_concept_check): Likewise.
(resolve_function_concept_overload): Likewise.
(resolve_function_concept_check): Likewise.
(resolve_concept_check): Likewise.
(deduce_constrained_parameter): Likewise.
(finish_type_constraints): Likewise.
(get_returned_expression): Likewise.
(get_variable_initializer): Likewise.
(norm_info::update_context, norm_info::ctx_params): Formatting
fixes.
(norm_info::context): Comment formatting fixes.
(normalize_logical_operation): Likewise. Formatting fix.
(normalize_concept_check): Comment formatting fixes.
(normalize_atom): Likewise.
(normalize_expression): Likewise.
(get_normalized_constraints_from_info): Likewise.
(get_normalized_constraints_from_decl): Likewise. Formatting
fixes.
(atomic_constraints_identical_p): Comment formatting fixes.
(constraints_equivalent_p): Formatting fixes.
(inchash::add_constraint): Likewise.
(associate_classtype_constraints): Comment formatting fixes.
(get_constraints): Likewise.
(set_constraints): Likewise.
(build_concept_check_arguments): Likewise.
(build_function_check): Likewise.
(build_concept_check): Likewise.
(finish_shorthand_constraint): Likewise.
(get_shorthand_constraints): Likewise.
(check_constraint_variables): Likewise.
(tsubst_constraint_variables): Likewise.
(tsubst_requires_expr): Likewise.
(get_mapped_args): Likewise. Formatting fixes.
(satisfy_atom): Comment formatting fixes.
(satisfy_constraint_r): Comment wording and formatting fixes.
(satisfy_normalized_constraints): Comment formatting fixes.
(satisfy_declaration_constraints): Likewise.
(evaluate_concept_check): Likewise.
(finish_requires_expr): Likewise.
(finish_compound_requirement): Likewise.
(check_function_concept): Likewise.
(equivalently_constrained): Likewise.
(more_constrained): Likewise.
(diagnose_atomic_constraint): Likewise.
* cp-tree.h (TREE_LANG_FLAG_0): Fix a comment error,
FOLD_EXPR_MODIFY_P instead of FOLD_EXPR_MODOP_P.
(DECL_MAIN_FREESTANDING_P, DECL_MAIN_P): Comment formatting fixes.
(enum cpp0x_warn_str): Likewise.
(enum composite_pointer_operation): Likewise.
(enum expr_list_kind): Likewise.
(enum impl_conv_rhs): Likewise.
(enum impl_conv_void): Likewise.
(struct deferred_access_check): Likewise.
(ATOMIC_CONSTR_EXPR): Likewise.
(FUNCTION_REF_QUALIFIED): Likewise.
(DECL_DEPENDENT_P): Likewise.
(FOLD_EXPR_MODIFY_P): Likewise.
(FOLD_EXPR_OP_RAW): Likewise.
(FOLD_EXPR_PACK): Likewise.
(FOLD_EXPR_INIT): Likewise.
(TYPE_WAS_UNNAMED): Likewise.
(class cp_unevaluated): Likewise.
(struct ovl_op_info_t assertion): Likewise.
(cp_declarator::function::requires_clause): Likewise.
(variable_template_p): Likewise.
(concept_definition_p): Likewise.
* logic.cc (clause::clause): Likewise.
(clause::replace): Likewise.
(clause::insert): Likewise. Formatting fixes.
(struct formula): Comment formatting fixes.
(formula::branch): Likewise.
(debug): Formatting fixes.
(dnf_size_r): Comment formatting fixes.
(cnf_size_r): Likewise.
(dnf_size): Likewise.
(cnf_size): Likewise.
(branch_clause): Likewise.
(decompose_term): Likewise. Formatting fixes.
(struct subsumption_entry): Comment formatting fixes.
(subsumption_cache): Likewise.
(save_subsumption): Likewise. Formatting fixes.
(subsumes_constraints_nonnull): Formatting fixes.
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Here we normalize the constraint same_as<T, bool> for the first
time during ttp coercion of B / UU, specifically constraint subsumption
checking. During this normalization the set of in-scope template
parameters i.e. current_template_parms is empty, which we rely on
during normalization of the ttp constraints since we pass in_decl=NULL_TREE
to norm_info. And this tricks the satisfaction cache into thinking that
the satisfaction value of same_as<T, bool> is independent of its template
parameters, and we incorrectly conflate the satisfaction value with
T = bool vs T = long and accept the specialization A<long, B>.
Since is_compatible_template_arg rewrites the ttp's constraints to
be in terms of the argument template's parameters, and since it's
the only caller of weakly_subsumes, the latter funcion can instead
pass in_decl=tmpl to avoid relying on current_template_parms. This
patch implements this, and in turns renames weakly_subsumes to
ttp_subsumes to reflect that this predicate is now hardcoded for this
one caller.
PR c++/115656
gcc/cp/ChangeLog:
* constraint.cc (weakly_subsumes): Pass in_decl=tmpl to
get_normalized_constraints_from_info. Rename to ...
(ttp_subsumes): ... this.
* cp-tree.h (weakly_subsumes): Rename to ...
(ttp_subsumes): ... this.
* pt.cc (is_compatible_template_arg): Adjust after renaming.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-ttp7.C: New test.
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch addresses a difference between the hash function and the equality
function for canonical types of template parameters (ctp_hasher). The equality
function uses comptypes (typeck.cc) (with COMPARE_STRUCTURAL) and checks
constraint equality for two auto nodes (typeck.cc:1586), while the hash
function ignores it (pt.cc:4528). This leads to hash collisions that can be
avoided by using `hash_placeholder_constraint` (constraint.cc:1150).
Note that due to the proper handling of hash collisions (hash-table.h:1059),
there is no test case that can distinguish the current implementation from the
proposed one.
* constraint.cc (hash_placeholder_constraint): Rename to
iterative_hash_placeholder_constraint.
(iterative_hash_placeholder_constraint): Rename from
hash_placeholder_constraint and add the initial val argument.
* cp-tree.h (hash_placeholder_constraint): Rename to
iterative_hash_placeholder_constraint.
(iterative_hash_placeholder_constraint): Renamed from
hash_placeholder_constraint and add the initial val argument.
* pt.cc (struct ctp_hasher): Updated to use
iterative_hash_placeholder_constraint in the case of a valid placeholder
constraint.
(auto_hash::hash): Reflect the renaming of hash_placeholder_constraint to
iterative_hash_placeholder_constraint.
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In GCC 14 we deprecated Concepts TS and discussed removing the code
in GCC 15. This patch removes Concepts TS code from the front end,
including support for template-introductions, as in:
template<typename T>
concept C = true;
C{T} void foo (T); // write template<C T> void foo (T);
The biggest part of this patch is adjusting the testsuite. We don't
want to lose coverage so I've converted most of -fconcepts-ts tests
to C++20. That means they no longer have to be c++17_only. Mostly
this meant turning "concept bool" into "concept" and turning function
concepts into C++20 concepts. I've added missing "auto"s where
required, but "auto"s in template-argument-lists are not supported
anymore so I've removed some of the tests; some of them are still
present to verify we don't crash on such autos. I've also added ()
around "requires" expressions.
I plan to add a porting_to.html entry with a few hints.
I've rebased and tested the patch after the recent r15-1103.
gcc/c-family/ChangeLog:
* c-cppbuiltin.cc (c_cpp_builtins): Remove flag_concepts_ts code.
* c-opts.cc (c_common_post_options): Likewise.
* c.opt: Remove -fconcepts-ts.
* c.opt.urls: Regenerate.
gcc/cp/ChangeLog:
* constraint.cc (deduce_concept_introduction, get_deduced_wildcard,
get_introduction_prototype, introduce_type_template_parameter,
introduce_template_template_parameter,
introduce_nontype_template_parameter,
build_introduced_template_parameter, introduce_template_parameter,
introduce_template_parameter_pack, introduce_template_parameter,
introduce_template_parameters, process_introduction_parms,
check_introduction_list, finish_template_introduction): Remove.
(finish_shorthand_constraint): Remove a Concepts TS comment.
* cp-tree.h (check_auto_in_tmpl_args, finish_template_introduction):
Remove.
* decl.cc (function_requirements_equivalent_p): Remove pre-C++20 code.
(grokfndecl): Don't check flag_concepts_ts.
(grokvardecl): Don't check that concept have type bool.
* parser.cc (cp_parser_decl_specifier_seq): Don't check
flag_concepts_ts.
(cp_parser_introduction_list): Remove.
(cp_parser_template_id): Remove dead code.
(cp_parser_simple_type_specifier): Don't check flag_concepts_ts.
(cp_parser_placeholder_type_specifier): Require require auto or
decltype(auto) even pre-C++20. Don't check flag_concepts_ts.
(cp_parser_type_id_1): Don't check flag_concepts_ts.
(cp_parser_template_type_arg): Likewise.
(cp_parser_requires_clause_opt): Remove flag_concepts_ts code.
(cp_parser_compound_requirement): Don't check flag_concepts_ts.
(cp_parser_template_introduction): Remove.
(cp_parser_template_declaration_after_export): Don't call
cp_parser_template_introduction.
* pt.cc (template_heads_equivalent_p): Remove pre-C++20 code.
(find_parameter_pack_data): Remove type_pack_expansion_p.
(find_parameter_packs_r): Remove flag_concepts_ts code. Remove
type_pack_expansion_p code.
(uses_parameter_packs): Remove type_pack_expansion_p code.
(make_pack_expansion): Likewise.
(check_for_bare_parameter_packs): Likewise.
(fixed_parameter_pack_p): Likewise.
(tsubst_qualified_id): Remove dead code.
(extract_autos_r): Remove.
(extract_autos): Remove.
(do_auto_deduction): Remove flag_concepts_ts code.
(type_uses_auto): Likewise.
(check_auto_in_tmpl_args): Remove.
gcc/ChangeLog:
* doc/invoke.texi: Mention that -fconcepts-ts was removed.
libstdc++-v3/ChangeLog:
* testsuite/std/ranges/access/101782.cc: Don't compile with
-fconcepts-ts.
gcc/testsuite/ChangeLog:
* g++.dg/concepts/auto3.C: Compile with -fconcepts. Run in C++17 and
up. Add dg-error.
* g++.dg/concepts/auto5.C: Likewise.
* g++.dg/concepts/auto7.C: Compile with -fconcepts. Add dg-error.
* g++.dg/concepts/auto8a.C: Compile with -fconcepts.
* g++.dg/concepts/class-deduction1.C: Compile with -fconcepts. Run in
C++17 and up. Convert to C++20.
* g++.dg/concepts/class5.C: Likewise.
* g++.dg/concepts/class6.C: Likewise.
* g++.dg/concepts/debug1.C: Likewise.
* g++.dg/concepts/decl-diagnose.C: Compile with -fconcepts. Run in
C++17 and up. Add dg-error.
* g++.dg/concepts/deduction-constraint1.C: Compile with -fconcepts.
Run in C++17 and up. Convert to C++20.
* g++.dg/concepts/diagnostic1.C: Likewise.
* g++.dg/concepts/dr1430.C: Likewise.
* g++.dg/concepts/equiv.C: Likewise.
* g++.dg/concepts/equiv2.C: Likewise.
* g++.dg/concepts/expression.C: Likewise.
* g++.dg/concepts/expression2.C: Likewise.
* g++.dg/concepts/expression3.C: Likewise.
* g++.dg/concepts/fn-concept2.C: Compile with -fconcepts. Run in
C++17 and up. Remove code. Add dg-prune-output.
* g++.dg/concepts/fn-concept3.C: Compile with -fconcepts. Run in
C++17 and up. Convert to C++20.
* g++.dg/concepts/fn1.C: Likewise.
* g++.dg/concepts/fn10.C: Likewise.
* g++.dg/concepts/fn2.C: Likewise.
* g++.dg/concepts/fn3.C: Likewise.
* g++.dg/concepts/fn4.C: Likewise.
* g++.dg/concepts/fn5.C: Likewise.
* g++.dg/concepts/fn6.C: Likewise.
* g++.dg/concepts/fn7.C: Compile with -fconcepts. Add dg-error.
* g++.dg/concepts/fn8.C: Compile with -fconcepts. Run in C++17 and up.
Convert to C++20.
* g++.dg/concepts/fn9.C: Likewise.
* g++.dg/concepts/generic-fn-err.C: Likewise.
* g++.dg/concepts/generic-fn.C: Likewise.
* g++.dg/concepts/inherit-ctor1.C: Likewise.
* g++.dg/concepts/inherit-ctor3.C: Likewise.
* g++.dg/concepts/intro1.C: Likewise.
* g++.dg/concepts/locations1.C: Compile with -fconcepts. Run in C++17
and up. Add dg-prune-output.
* g++.dg/concepts/partial-concept-id1.C: Compile with -fconcepts.
Run in C++17 and up. Convert to C++20.
* g++.dg/concepts/partial-concept-id2.C: Likewise.
* g++.dg/concepts/partial-spec5.C: Likewise.
* g++.dg/concepts/placeholder2.C: Likewise.
* g++.dg/concepts/placeholder3.C: Likewise.
* g++.dg/concepts/placeholder4.C: Likewise.
* g++.dg/concepts/placeholder5.C: Likewise.
* g++.dg/concepts/placeholder6.C: Likewise.
* g++.dg/concepts/pr65634.C: Likewise.
* g++.dg/concepts/pr65636.C: Likewise.
* g++.dg/concepts/pr65681.C: Likewise.
* g++.dg/concepts/pr65848.C: Likewise.
* g++.dg/concepts/pr67249.C: Likewise.
* g++.dg/concepts/pr67595.C: Likewise.
* g++.dg/concepts/pr68434.C: Likewise.
* g++.dg/concepts/pr71127.C: Likewise.
* g++.dg/concepts/pr71128.C: Compile with -fconcepts. Run in C++17
and up. Add dg-error.
* g++.dg/concepts/pr71131.C: Compile with -fconcepts. Run in C++17
and up. Convert to C++20.
* g++.dg/concepts/pr71385.C: Likewise.
* g++.dg/concepts/pr85065.C: Likewise.
* g++.dg/concepts/pr92804-2.C: Compile with -fconcepts. Convert to
C++20.
* g++.dg/concepts/template-parm11.C: Compile with -fconcepts. Run in
C++17 and up. Convert to C++20.
* g++.dg/concepts/template-parm12.C: Likewise.
* g++.dg/concepts/template-parm2.C: Likewise.
* g++.dg/concepts/template-parm3.C: Likewise.
* g++.dg/concepts/template-parm4.C: Likewise.
* g++.dg/concepts/template-template-parm1.C: Likewise.
* g++.dg/concepts/var-concept1.C: Likewise.
* g++.dg/concepts/var-concept2.C: Likewise.
* g++.dg/concepts/var-concept3.C: Likewise.
* g++.dg/concepts/var-concept4.C: Likewise.
* g++.dg/concepts/var-concept5.C: Likewise.
* g++.dg/concepts/var-concept6.C: Likewise.
* g++.dg/concepts/var-concept7.C: Likewise.
* g++.dg/concepts/var-templ1.C: Run in C++17 and up.
* g++.dg/concepts/var-templ2.C: Compile with -fconcepts. Run in C++17
and up. Convert to C++20.
* g++.dg/concepts/var-templ3.C: Likewise.
* g++.dg/concepts/variadic1.C: Likewise.
* g++.dg/concepts/variadic2.C: Likewise.
* g++.dg/concepts/variadic3.C: Likewise.
* g++.dg/concepts/variadic4.C: Likewise.
* g++.dg/cpp2a/concepts-pr65575.C: Likewise.
* g++.dg/cpp2a/concepts-pr66091.C: Likewise.
* g++.dg/cpp2a/concepts-pr67148.C: Compile with -fconcepts. Convert
to C++20.
* g++.dg/cpp2a/concepts-pr67225-1.C: Likewise.
* g++.dg/cpp2a/concepts-pr67225-2.C: Likewise.
* g++.dg/cpp2a/concepts-pr67225-3.C: Likewise.
* g++.dg/cpp2a/concepts-pr67225-4.C: Likewise.
* g++.dg/cpp2a/concepts-pr67225-5.C: Likewise.
* g++.dg/cpp2a/concepts-pr67319.C: Likewise.
* g++.dg/cpp2a/concepts-pr67427.C: Likewise.
* g++.dg/cpp2a/concepts-pr67654.C: Likewise.
* g++.dg/cpp2a/concepts-pr67658.C: Likewise.
* g++.dg/cpp2a/concepts-pr67684.C: Likewise.
* g++.dg/cpp2a/concepts-pr67697.C: Likewise.
* g++.dg/cpp2a/concepts-pr67719.C: Likewise.
* g++.dg/cpp2a/concepts-pr67774.C: Likewise.
* g++.dg/cpp2a/concepts-pr67825.C: Likewise.
* g++.dg/cpp2a/concepts-pr67860.C: Likewise.
* g++.dg/cpp2a/concepts-pr67862.C: Likewise.
* g++.dg/cpp2a/concepts-pr67969.C: Likewise.
* g++.dg/cpp2a/concepts-pr68093-2.C: Likewise.
* g++.dg/cpp2a/concepts-pr68372.C: Likewise.
* g++.dg/cpp2a/concepts-pr68812.C: Likewise.
* g++.dg/cpp2a/concepts-pr69235.C: Likewise.
* g++.dg/cpp2a/concepts-pr78752-2.C: Likewise.
* g++.dg/cpp2a/concepts-pr78752.C: Likewise.
* g++.dg/cpp2a/concepts-pr79759.C: Likewise.
* g++.dg/cpp2a/concepts-pr80746.C: Likewise.
* g++.dg/cpp2a/concepts-pr80773.C: Likewise.
* g++.dg/cpp2a/concepts-pr82507.C: Likewise.
* g++.dg/cpp2a/concepts-pr82740.C: Likewise.
* g++.dg/cpp2a/concepts-pr84980.C: Compile with -fconcepts. Run in
C++17 and up. Convert to C++20.
* g++.dg/cpp2a/concepts-pr85265.C: Likewise.
* g++.dg/cpp2a/concepts-pr85808.C: Compile with -fconcepts. Convert
to C++20.
* g++.dg/cpp2a/concepts-pr86269.C: Likewise.
* g++.dg/cpp2a/concepts-pr87441.C: Likewise.
* g++.dg/cpp2a/concepts-requires5.C: Compile with -fconcepts.
Adjust dg-error. Add same_as.
* g++.dg/cpp2a/nontype-class50a.C: Compile with -fconcepts.
* g++.dg/concepts/auto1.C: Removed.
* g++.dg/concepts/auto4.C: Removed.
* g++.dg/concepts/auto6.C: Removed.
* g++.dg/concepts/fn-concept1.C: Removed.
* g++.dg/concepts/intro2.C: Removed.
* g++.dg/concepts/intro3.C: Removed.
* g++.dg/concepts/intro4.C: Removed.
* g++.dg/concepts/intro5.C: Removed.
* g++.dg/concepts/intro6.C: Removed.
* g++.dg/concepts/intro7.C: Removed.
* g++.dg/cpp2a/concepts-ts1.C: Removed.
* g++.dg/cpp2a/concepts-ts2.C: Removed.
* g++.dg/cpp2a/concepts-ts3.C: Removed.
* g++.dg/cpp2a/concepts-ts4.C: Removed.
* g++.dg/cpp2a/concepts-ts5.C: Removed.
* g++.dg/cpp2a/concepts-ts6.C: Removed.
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The tf_norm flag controlling whether to build diagnostic information
during constraint normalization doesn't need to be a global tsubst flag,
and is confusingly named. This patch replaces it with a boolean flag
local to normalization.
gcc/cp/ChangeLog:
* constraint.cc (norm_info::norm_info): Take a bool instead of
tsubst_flags_t.
(norm_info::generate_diagnostics): Turn this predicate function
into a bool data member.
(normalize_logical_operation): Adjust after norm_info changes.
(normalize_concept_check): Likewise.
(normalize_atom): Likewise.
(get_normalized_constraints_from_info): Likewise.
(normalize_concept_definition): Likewise.
(normalize_constraint_expression): Likewise.
(normalize_placeholder_type_constraints): Likewise.
(satisfy_nondeclaration_constraints): Likewise.
* cp-tree.h (enum tsubst_flags): Remove tf_norm.
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_nothrow_invocable.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_nothrow_invocable.
* constraint.cc (diagnose_trait_expr): Handle
CPTK_IS_NOTHROW_INVOCABLE.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__is_nothrow_invocable.
* g++.dg/ext/is_nothrow_invocable.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_invocable.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_invocable.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_INVOCABLE.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
* cp-tree.h (build_invoke): New function.
* method.cc (build_invoke): New function.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_invocable.
* g++.dg/ext/is_invocable1.C: New test.
* g++.dg/ext/is_invocable2.C: New test.
* g++.dg/ext/is_invocable3.C: New test.
* g++.dg/ext/is_invocable4.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Patrick Palka <ppalka@redhat.com>
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::rank.
gcc/cp/ChangeLog:
* cp-trait.def: Define __array_rank.
* constraint.cc (diagnose_trait_expr): Handle CPTK_RANK.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __array_rank.
* g++.dg/ext/rank.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_unbounded_array.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_unbounded_array.
* constraint.cc (diagnose_trait_expr): Handle
CPTK_IS_UNBOUNDED_ARRAY.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__is_unbounded_array.
* g++.dg/ext/is_unbounded_array.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_pointer.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_pointer.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_POINTER.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_pointer.
Arrange the order lexically around __is_pointer.
* g++.dg/ext/is_pointer.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_volatile.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_volatile.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_VOLATILE.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_volatile.
* g++.dg/ext/is_volatile.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_const.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_const.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_CONST.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_const.
* g++.dg/ext/is_const.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jason Merrill <jason@redhat.com>
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r13-6452-g341e6cd8d603a3 made build_extra_args walk evaluated contexts
first so that we prefer processing a local specialization in an evaluated
context even if its first use is in an unevaluated context. But this
means we need to avoid walking a tree that already has extra args/specs
saved because the list of saved specs appears to be an evaluated
context which we'll now walk first. It seems then that we should be
calculating the saved specs from scratch each time, rather than
potentially walking the saved specs list from an earlier partial
instantiation when calling build_extra_args a second time around.
PR c++/114303
gcc/cp/ChangeLog:
* constraint.cc (tsubst_requires_expr): Clear
REQUIRES_EXPR_EXTRA_ARGS before calling build_extra_args.
* pt.cc (tree_extra_args): Define.
(extract_locals_r): Assert *_EXTRA_ARGS is empty.
(tsubst_stmt) <case IF_STMT>: Clear IF_SCOPE on the new
IF_STMT. Call build_extra_args on the new IF_STMT instead
of t which might already have IF_STMT_EXTRA_ARGS.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1z/constexpr-if-lambda6.C: New test.
Reviewed-by: Jason Merrill <jason@redhat.com>
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When partially substituting a requires-expr, we don't want to perform
any additional checks beyond the substitution itself so as to minimize
checking requirements out of order. So don't check the return-type-req
of a compound-requirement during partial substitution. And don't check
the noexcept condition either since we can't do that on templated trees.
PR c++/113966
gcc/cp/ChangeLog:
* constraint.cc (tsubst_compound_requirement): Don't check
the noexcept condition or the return-type-requirement when
partially substituting.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-friend17.C: New test.
Reviewed-by: Jason Merrill <jason@redhat.com>
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In r11-3261-gb28b621ac67bee we made tsubst_requires_expr never partially
substitute into a requires-expression so as to avoid checking its
requirements out of order during e.g. generic lambda regeneration.
These PRs however illustrate that we still sometimes do need to
partially substitute into a requires-expression, in particular when it
appears in associated constraints that we're directly substituting for
sake of declaration matching or dguide constraint rewriting. In these
cases we're being called from tsubst_constraint during which
processing_constraint_expression_p is true, so this patch checks this
predicate to control whether we defer substitution or partially
substitute.
In turn, we now need to propagate semantic tsubst flags through
tsubst_requires_expr rather than just using tf_none, notably for sake of
dguide constraint rewriting which sets tf_dguide.
PR c++/110006
PR c++/112769
gcc/cp/ChangeLog:
* constraint.cc (subst_info::quiet): Accomodate non-diagnostic
tsubst flags.
(tsubst_valid_expression_requirement): Likewise.
(tsubst_simple_requirement): Return a substituted _REQ node when
processing_template_decl.
(tsubst_type_requirement_1): Accomodate non-diagnostic tsubst
flags.
(tsubst_type_requirement): Return a substituted _REQ node when
processing_template_decl.
(tsubst_compound_requirement): Likewise. Accomodate non-diagnostic
tsubst flags.
(tsubst_nested_requirement): Likewise.
(tsubst_requires_expr): Don't defer partial substitution when
processing_constraint_expression_p is true, in which case return
a substituted REQUIRES_EXPR.
* pt.cc (tsubst_expr) <case REQUIRES_EXPR>: Accomodate
non-diagnostic tsubst flags.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/class-deduction-alias18.C: New test.
* g++.dg/cpp2a/concepts-friend16.C: New test.
Reviewed-by: Jason Merrill <jason@redhat.com>
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This patch implements built-in trait for std::is_object.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_object.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_OBJECT.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_object.
* g++.dg/ext/is_object.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_function.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_function.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_FUNCTION.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_function.
* g++.dg/ext/is_function.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_reference.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_reference.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_REFERENCE.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_reference.
* g++.dg/ext/is_reference.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_member_object_pointer.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_member_object_pointer.
* constraint.cc (diagnose_trait_expr): Handle
CPTK_IS_MEMBER_OBJECT_POINTER.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__is_member_object_pointer.
* g++.dg/ext/is_member_object_pointer.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_member_function_pointer.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_member_function_pointer.
* constraint.cc (diagnose_trait_expr): Handle
CPTK_IS_MEMBER_FUNCTION_POINTER.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__is_member_function_pointer.
* g++.dg/ext/is_member_function_pointer.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_member_pointer.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_member_pointer.
* constraint.cc (diagnose_trait_expr): Handle
CPTK_IS_MEMBER_POINTER.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__is_member_pointer.
* g++.dg/ext/is_member_pointer.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_scoped_enum.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_scoped_enum.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_SCOPED_ENUM.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_scoped_enum.
* g++.dg/ext/is_scoped_enum.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_bounded_array.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_bounded_array.
* constraint.cc (diagnose_trait_expr): Handle
CPTK_IS_BOUNDED_ARRAY.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of
__is_bounded_array.
* g++.dg/ext/is_bounded_array.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch implements built-in trait for std::is_array.
gcc/cp/ChangeLog:
* cp-trait.def: Define __is_array.
* constraint.cc (diagnose_trait_expr): Handle CPTK_IS_ARRAY.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __is_array.
* g++.dg/ext/is_array.C: New test.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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This patch sorts built-in traits alphabetically for better code
readability.
gcc/cp/ChangeLog:
* constraint.cc (diagnose_trait_expr): Sort built-in traits
alphabetically.
* cp-trait.def: Likewise.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
(finish_trait_type): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Sort built-in traits alphabetically.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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Per https://github.com/itanium-cxx-abi/cxx-abi/issues/24 and
https://github.com/itanium-cxx-abi/cxx-abi/pull/166
We need to mangle constraints to be able to distinguish between function
templates that only differ in constraints. From the latter link, we want to
use the template parameter mangling previously specified for lambdas to also
make explicit the form of a template parameter where the argument is not a
"natural" fit for it, such as when the parameter is constrained or deduced.
I'm concerned about how the latter link changes the mangling for some C++98
and C++11 patterns, so I've limited template_parm_natural_p to avoid two
cases found by running the testsuite with -Wabi forced on:
template <class T, T V> T f() { return V; }
int main() { return f<int,42>(); }
template <int i> int max() { return i; }
template <int i, int j, int... rest> int max()
{
int sub = max<j, rest...>();
return i > sub ? i : sub;
}
int main() { return max<1,2,3>(); }
A third C++11 pattern is changed by this patch:
template <template <typename...> class TT, typename... Ts> TT<Ts...> f();
template <typename> struct A { };
int main() { f<A,int>(); }
I aim to resolve these with the ABI committee before GCC 14.1.
We also need to resolve https://github.com/itanium-cxx-abi/cxx-abi/issues/38
(mangling references to dependent template-ids where the name is fully
resolved) as references to concepts in std:: will consistently run into this
area. This is why mangle-concepts1.C only refers to concepts in the global
namespace so far.
The library changes are to avoid trying to mangle builtins, which fails.
Demangler support and test coverage is not complete yet.
gcc/cp/ChangeLog:
* cp-tree.h (TEMPLATE_ARGS_TYPE_CONSTRAINT_P): New.
(get_concept_check_template): Declare.
* constraint.cc (combine_constraint_expressions)
(finish_shorthand_constraint): Use UNKNOWN_LOCATION.
* pt.cc (convert_generic_types_to_packs): Likewise.
* mangle.cc (write_constraint_expression)
(write_tparms_constraints, write_type_constraint)
(template_parm_natural_p, write_requirement)
(write_requires_expr): New.
(write_encoding): Mangle trailing requires-clause.
(write_name): Pass parms to write_template_args.
(write_template_param_decl): Factor out from...
(write_closure_template_head): ...here.
(write_template_args): Mangle non-natural parms
and requires-clause.
(write_expression): Handle REQUIRES_EXPR.
include/ChangeLog:
* demangle.h (enum demangle_component_type): Add
DEMANGLE_COMPONENT_CONSTRAINTS.
libiberty/ChangeLog:
* cp-demangle.c (d_make_comp): Handle
DEMANGLE_COMPONENT_CONSTRAINTS.
(d_count_templates_scopes): Likewise.
(d_print_comp_inner): Likewise.
(d_maybe_constraints): New.
(d_encoding, d_template_args_1): Call it.
(d_parmlist): Handle 'Q'.
* testsuite/demangle-expected: Add some constraint tests.
libstdc++-v3/ChangeLog:
* include/std/bit: Avoid builtins in requires-clauses.
* include/std/variant: Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/abi/mangle10.C: Disable compat aliases.
* g++.dg/abi/mangle52.C: Specify ABI 18.
* g++.dg/cpp2a/class-deduction-alias3.C
* g++.dg/cpp2a/class-deduction-alias8.C:
Avoid builtins in requires-clauses.
* g++.dg/abi/mangle-concepts1.C: New test.
* g++.dg/abi/mangle-ttp1.C: New test.
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I want to distinguish between constraint && and fold-expressions there of
written by the user and those implied by template parameter
type-constraints; to that end, let's improve our EXPR_LOCATION for an
explicit fold-expression.
The fold3.C change is needed because this moves the caret from the end of
the expression to the operator, which means the location of the error refers
to the macro invocation rather than the macro definition; both locations are
still printed, but which one is an error and which a note changes.
gcc/cp/ChangeLog:
* parser.cc (cp_parser_fold_expression): Track location range.
* semantics.cc (finish_unary_fold_expr)
(finish_left_unary_fold_expr, finish_right_unary_fold_expr)
(finish_binary_fold_expr): Add location parm.
* constraint.cc (finish_shorthand_constraint): Pass it.
* pt.cc (convert_generic_types_to_packs): Likewise.
* cp-tree.h: Adjust.
gcc/testsuite/ChangeLog:
* g++.dg/concepts/diagnostic3.C: Add expected column.
* g++.dg/cpp1z/fold3.C: Adjust diagnostic lines.
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While working on PR109751 I found that maybe_substitute_reqs_for was doing
the wrong thing for a non-template friend, substituting in the template args
of the scope's original template rather than those of the instantiation.
This didn't end up being necessary to fix the PR, but it's still an
improvement.
gcc/cp/ChangeLog:
* pt.cc (outer_template_args): Handle non-template argument.
* constraint.cc (maybe_substitute_reqs_for): Pass decl to it.
* cp-tree.h (outer_template_args): Adjust.
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We can avoid performing two norm_cache lookups during normalization of a
concept-id by allocating and inserting a norm_entry* before rather than
after the fact, which is simpler and cheaper.
gcc/cp/ChangeLog:
* constraint.cc (normalize_concept_check): Avoid having to do
two norm_cache lookups. Remove unnecessary early exit for an
ill-formed concept definition.
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After diagnosing and recovering from unstable satisfaction, it's
possible to evaluate an atom for the first time noisily rather than
quietly. The satisfaction cache tries to handle this situation
gracefully, but apparently not gracefully enough: we inserted an empty
slot into the cache, and left it empty, which later makes
hash_table::check_complete_insertion unhappy. This patch fixes this by
removing the empty slot in this case.
PR c++/109752
gcc/cp/ChangeLog:
* constraint.cc (satisfaction_cache::satisfaction_cache): In the
unexpected case of evaluating an atom for the first time noisily,
remove the cache slot that we inserted.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-pr109752.C: New test.
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This patch makes us use TREE_VEC instead of TREE_LIST to represent the
trailing arguments of a variadic built-in trait. These built-ins are
typically passed a simple pack expansion as the second argument, e.g.
__is_constructible(T, Ts...)
and the main benefit of this representation change is that substituting
into this argument list is now basically free since tsubst_template_args
makes sure we reuse the TREE_VEC of the corresponding ARGUMENT_PACK when
expanding such a pack expansion. In the previous TREE_LIST representation
we would need need to convert the expanded pack expansion into a TREE_LIST
(via tsubst_tree_list).
Note that an empty set of trailing arguments is now represented as an
empty TREE_VEC instead of NULL_TREE, so now TRAIT_TYPE/EXPR_TYPE2 will
be empty only for unary traits.
gcc/cp/ChangeLog:
* constraint.cc (diagnose_trait_expr): Convert a TREE_VEC
of arguments into a TREE_LIST for sake of pretty printing.
* cxx-pretty-print.cc (pp_cxx_trait): Handle TREE_VEC
instead of TREE_LIST of trailing variadic trait arguments.
* method.cc (constructible_expr): Likewise.
(is_xible_helper): Likewise.
* parser.cc (cp_parser_trait): Represent trailing variadic trait
arguments as a TREE_VEC instead of TREE_LIST.
* pt.cc (value_dependent_expression_p): Handle TREE_VEC
instead of TREE_LIST of trailing variadic trait arguments.
* semantics.cc (finish_type_pack_element): Likewise.
(check_trait_type): Likewise.
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When satisfaction_cache::get detects constraint recursion, it asserts
that entry->result is empty. This makes sense when we're initially
detecting/diagnosing recursion from the inner recursive call, but
afterwards from the outer recursive call the recursion error is treated
like any other unrelated constraint failure encountered during
satisfaction, and we set entry->result to whatever the satisfaction
value ended up being.
Perhaps we should keep entry->result cleared in this case, but that'd
require the inner recursive call to communicate to the outer recursive
call that constraint recursion occurred, likely via setting entry->result
to some sentinel value, which doesn't seem to be worth the complexity.
So this patch just relaxes the problematic assert to accept non-empty
entry->result as long as we've already issued an error.
PR c++/100288
gcc/cp/ChangeLog:
* constraint.cc (satisfaction_cache::get): Relax overly strict
checking assert in the constraint recursion case.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-recursive-sat5.C: New test.
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C++20 class template argument deduction for an alias template involves
adding a constraint that the template arguments for the alias template can
be deduced from the return type of the deduction guide for the underlying
class template. In the standard, this is modeled as defining a class
template with a partial specialization, but it's much more efficient to
implement with a trait that directly tries to perform the deduction.
The first argument to the trait is a template rather than a type, so various
places needed to be adjusted to accommodate that.
PR c++/105841
gcc/ChangeLog:
* doc/extend.texi (Type Traits):: Document __is_deducible.
gcc/cp/ChangeLog:
* cp-trait.def (IS_DEDUCIBLE): New.
* cxx-pretty-print.cc (pp_cxx_trait): Handle non-type.
* parser.cc (cp_parser_trait): Likewise.
* tree.cc (cp_tree_equal): Likewise.
* pt.cc (tsubst_copy_and_build): Likewise.
(type_targs_deducible_from): New.
(alias_ctad_tweaks): Use it.
* semantics.cc (trait_expr_value): Handle CPTK_IS_DEDUCIBLE.
(finish_trait_expr): Likewise.
* constraint.cc (diagnose_trait_expr): Likewise.
* cp-tree.h (type_targs_deducible_from): Declare.
gcc/testsuite/ChangeLog:
* g++.dg/ext/is_deducible1.C: New test.
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This patch converts the constexpr machinery's manifestly_const_eval flag
into a tri-state enum to allow us to express wanting to fold
__builtin_is_constant_evaluated to false via speculative constexpr
evaluation. For now, only the maybe_constant_value entry point is
changed to take this enum; the others continue to take bool. The
subsequent patch will teach cp_fold (which uses maybe_constant_value) to
fold the builtin to false when called from cp_fold_function and
cp_fully_fold_init.
gcc/cp/ChangeLog:
* constexpr.cc (constexpr_call::manifestly_const_eval): Give
it type int instead of bool.
(constexpr_ctx::manifestly_const_eval): Give it type mce_value
instead of bool.
(cxx_eval_builtin_function_call): Adjust after making
manifestly_const_eval tri-state.
(cxx_eval_call_expression): Likewise.
(cxx_eval_binary_expression): Likewise.
(cxx_eval_conditional_expression): Likewise.
(cxx_eval_constant_expression): Likewise.
(cxx_eval_outermost_constant_expr): Likewise.
(cxx_constant_value): Likewise.
(cxx_constant_dtor): Likewise.
(maybe_constant_value): Give manifestly_const_eval parameter
type mce_value instead of bool and adjust accordingly.
(fold_non_dependent_expr_template): Adjust call
to cxx_eval_outermost_constant_expr.
(fold_non_dependent_expr): Likewise.
(maybe_constant_init_1): Likewise.
* constraint.cc (satisfy_atom): Adjust call to
maybe_constant_value.
* cp-tree.h (enum class mce_value): Define.
(maybe_constant_value): Adjust manifestly_const_eval parameter
type and default argument.
* decl.cc (compute_array_index_type_loc): Adjust call to
maybe_constant_value.
* pt.cc (convert_nontype_argument): Likewise.
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Use NO_INSERT to test whether inserting should be attempted.
for gcc/cp/ChangeLog
* constraint.cc (normalize_concept_check): Use NO_INSERT for
pre-insertion check.
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When instantiating a constrained hidden template friend, we substitute
into its template-head requirements in tsubst_friend_function. For this
substitution we use the template's full argument vector whose outer
levels correspond to the instantiated class's arguments and innermost
level corresponds to the template's own level-lowered generic arguments.
But for A<int>::f here, for which the relevant argument vector is
{{int}, {Us...}}, the substitution into (C<Ts, Us> && ...) triggers the
assert in use_pack_expansion_extra_args_p since one argument is a pack
expansion and the other isn't.
And for A<int, int>::f, for which the relevant argument vector is
{{int, int}, {Us...}}, the use_pack_expansion_extra_args_p assert would
also trigger but we first get a bogus "mismatched argument pack lengths"
error from tsubst_pack_expansion.
Sidestepping the question of whether tsubst_pack_expansion should be
able to handle such substitutions, it seems we can work around this by
using only the instantiated class's arguments and not also the template
friend's own generic arguments, which is consistent with how we normally
substitute into the signature of a member template.
PR c++/107853
gcc/cp/ChangeLog:
* constraint.cc (maybe_substitute_reqs_for): Substitute into
the template-head requirements of a template friend using only
its outer arguments via outer_template_args.
* cp-tree.h (outer_template_args): Declare.
* pt.cc (outer_template_args): Define, factored out and
generalized from ...
(ctor_deduction_guides_for): ... here.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-friend12.C: New test.
* g++.dg/cpp2a/concepts-friend13.C: New test.
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Here we end up giving the two BOUND_TEMPLATE_TEMPLATE_PARMs
C<decltype(f::t)> and C<decltype(g::t)> the same TYPE_CANONICAL because
the hash table that interns TYPE_CANONICAL for template type parameters
doesn't set the comparing_specializations flag which controls how
PARM_DECLs from different contexts compare equal.
Later, from spec_hasher::equal for the corresponding two specializations
A<C<decltype(f::t)>> and A<C<decltype(g::t)>>, we compare the two bound
ttps with comparing_specializations set hence they now (structurally)
compare different despite having the same TYPE_CANONICAL, and so we get
the error:
internal compiler error: same canonical type node for different types
'C<decltype (t)>' and 'C<decltype (t)>'
This suggests that we should be setting comparing_specializations from
ctp_hasher::equal to match spec_hasher::equal. But doing so introduces
a separate ICE in cpp2a/concepts-placeholder3.C:
internal compiler error: canonical types differ for identical types
'auto [requires ::same_as<<placeholder>, decltype(f::x)>]' and
'auto [requires ::same_as<<placeholder>, decltype(g::x)>]'
because norm_hasher::equal doesn't set comparing_specializations either.
I'm not sure when exactly we need to set comparing_specializations given
what it controls (TYPENAME_TYPE equality/hashing and PARM_DECL equality)
but it seems to be the conservative choice to set the flag wherever we
have a global hash table that relies on type equality. To that end this
patch sets comparing_specializations in ctp_hasher and norm_hasher, as
well as in atom_hasher and sat_hasher for good measure. This turns out
to be a compile time win of about 2% in some concepts tests, probably
because of the improved TYPENAME_TYPE hashing enabled by the flag.
PR c++/107539
gcc/cp/ChangeLog:
* constraint.cc (norm_hasher::hash, norm_hasher::equal): Set
comparing_specializations.
(sat_hasher::hash, sat_hasher::equal): Likewise.
* cp-tree.h (atom_hasher::hash, atom_hasher::equal): Likewise.
* pt.cc (ctp_hasher::hash, ctp_hasher::equal): Likewise.
gcc/testsuite/ChangeLog:
* g++.dg/template/canon-type-19.C: New test.
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We already cache the overall normal form of a declaration's constraints
(under the assumption that it can't change over the translation unit).
But if we have something like
template<class T> concept complicated = /* ... */;
template<class T> void f() requires complicated<T> && /* ... */;
template<class T> void g() requires complicated<T> && /* ... */;
then despite this high-level caching we'd still redundantly have to
expand the concept-id complicated<T> twice, once during normalization of
f's constraints and again during normalization of g's. Ideally, we'd
reuse the previously computed normal form of complicated<T> the second
time around.
To that end this patch introduces an intermediate layer of caching
during constraint normalization -- caching of the normal form of a
concept-id -- that sits between our high-level caching of the overall
normal form of a declaration's constraints and our low-level caching of
each individual atomic constraint.
It turns out this caching generalizes normalize_concept_check's caching
of the normal form of a concept definition (which is equivalent to the
normal form of the concept-id C<gtargs> where gtargs is C's generic
arguments) so this patch unifies the caching accordingly.
gcc/cp/ChangeLog:
* constraint.cc (struct norm_entry): Define.
(struct norm_hasher): Define.
(norm_cache): Define.
(normalize_concept_check): Add function comment. Cache the
the normal form of the substituted concept-id. Canonicalize
generic arguments as NULL_TREE. Don't coerce arguments unless
they were substituted.
(normalize_concept_definition): Simplify. Use norm_cache
instead of normalized_map.
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The following patch adds parsing of attributes to concept definition,
allows deprecated attribute to be specified (as CONCEPT_DECL now needs
to be checked in c-family/c-attribs.cc, I had to move its declaration
from cp/*.def to c-family/*.def) and checks TREE_DEPRECATED in
build_standard_check (not sure if that is the right spot, or whether
it shouldn't be checked also for variable and function concepts and
how to write testcase coverage for that).
2022-11-16 Jakub Jelinek <jakub@redhat.com>
gcc/c-family/
* c-common.def (CONCEPT_DECL): New tree, moved here from
cp-tree.def.
* c-common.cc (c_common_init_ts): Handle CONCEPT_DECL.
* c-attribs.cc (handle_deprecated_attribute): Allow deprecated
attribute on CONCEPT_DECL.
gcc/cp/
* cp-tree.def (CONCEPT_DECL): Move to c-common.def.
* cp-objcp-common.cc (cp_common_init_ts): Don't handle CONCEPT_DECL
here.
* cp-tree.h (finish_concept_definition): Add ATTRS parameter.
* parser.cc (cp_parser_concept_definition): Parse attributes in
between identifier and =. Adjust finish_concept_definition
caller.
* pt.cc (finish_concept_definition): Add ATTRS parameter. Call
cplus_decl_attributes.
* constraint.cc (build_standard_check): If CONCEPT_DECL is
TREE_DEPRECATED, emit -Wdeprecated-declaration warnings.
gcc/testsuite/
* g++.dg/cpp2a/concepts-dr2428.C: New test.
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It seems the only and original purpose of tsubst_copy_and_build's
integral_constant_expression_p boolean parameter (added in r116276, which
predates the constexpr machinery) is to diagnose certain constructs that
aren't allowed to appear in a C++98 integral constant expression
context, specifically casts to a non-integral type (diagnosed from the
*_CAST_EXPR case of tsubst_copy_and_build) or dependent names that
resolve to a non-constant decl (diagnosed from the IDENTIFIER_NODE case
of tsubst_copy_and_build). The parameter has no effect outside of C++98
AFAICT.
But diagnosing such constructs should arguably be the job of the constexpr
machinery (e.g. is_constant_expression) after substitution, and doing it
during substitution by way of an additional parameter complicates the
API of this workhorse function for what amounts to a couple of archaic
C++98 restrictions. And it seems is_constant_expression already does a
good job of diagnosing the aforementioned two constructs in C++98 mode,
at least as far as our testsuite is concerned.
So this patch removes this parameter from tsubst_copy_and_build,
tsubst_expr and tsubst_copy_and_build_call_args. The only interesting
changes are to potential_constant_expression_1 and the IDENTIFIER_NODE
and *_CAST_EXPR cases of tsubst_copy_and_build; the rest are mechanical
adjustments to the functions' signatures and their call sites.
gcc/cp/ChangeLog:
* constexpr.cc (potential_constant_expression_1)
<case *_CAST_EXPR>: Use
cast_valid_in_integral_constant_expression_p instead of
open coding it.
* constraint.cc (tsubst_valid_expression_requirement): Adjust
calls to tsubst_copy_and_build and tsubst_expr.
(tsubst_constraint): Likewise.
(satisfy_atom): Likewise.
(diagnose_trait_expr): Likewise.
* cp-tree.h (tsubst_copy_and_build): Remove i_c_e_p parameter.
(tsubst_expr): Likewise.
* init.cc (get_nsdmi): Adjust calls to tsubst_copy_and_build
and tsubst_expr.
* pt.cc (expand_integer_pack): Likewise.
(instantiate_non_dependent_expr_internal): Likewise.
(tsubst_friend_function): Likewise.
(tsubst_attribute): Likewise.
(instantiate_class_template): Likewise.
(tsubst_template_arg): Likewise.
(gen_elem_of_pack_expansion_instantiation): Likewise.
(tsubst_fold_expr_init): Likewise.
(tsubst_pack_expansion): Likewise.
(tsubst_default_argument): Likewise.
(tsubst_function_decl): Likewise.
(tsubst_decl): Likewise.
(tsubst_arg_types): Likewise.
(tsubst_exception_specification): Likewise.
(tsubst): Likewise.
(tsubst_init): Likewise.
(tsubst_copy): Likewise.
(tsubst_omp_clause_decl): Likewise.
(tsubst_omp_clauses): Likewise.
(tsubst_copy_asm_operands): Likewise.
(tsubst_omp_for_iterator): Likewise.
(tsubst_expr): Likewise. Remove i_c_e_p parameter.
(tsubst_omp_udr): Likewise.
(tsubst_non_call_postfix_expression): Likewise. Remove i_c_e_p parameter.
(tsubst_lambda_expr): Likewise.
(tsubst_copy_and_build_call_args): Likewise.
(tsubst_copy_and_build): Likewise. Remove i_c_e_p parameter.
<case IDENTIFIER_NODE>: Adjust call to finish_id_expression
following removal of i_c_e_p.
<case *_CAST_EXPR>: Remove C++98-specific cast validity check
guarded by i_c_e_p.
(maybe_instantiate_noexcept): Adjust calls to
tsubst_copy_and_build and tsubst_expr.
(instantiate_body): Likewise.
(instantiate_decl): Likewise.
(tsubst_initializer_list): Likewise.
(tsubst_enum): Likewise.
gcc/objcp/ChangeLog:
* objcp-lang.cc (objcp_tsubst_copy_and_build): Adjust calls to
tsubst_copy_and_build and tsubst_expr.
gcc/testsuite/ChangeLog:
* g++.dg/template/crash55.C: Don't expect additional
C++98-specific diagnostics.
* g++.dg/template/ref3.C: Remove C++98-specific xfail.
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Like during satisfaction, we also need to avoid deferring access checks
during substitution of a requires-expr because the outcome of an access
check can determine the value of the requires-expr. Otherwise (in
deferred access checking contexts such as within a base-clause), the
requires-expr may evaluate to the wrong result, and along the way a
failed access check may leak out from it into a non-SFINAE context and
cause a hard error (as in the below testcase).
PR c++/107179
gcc/cp/ChangeLog:
* constraint.cc (tsubst_requires_expr): Make sure we're not
deferring access checks.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-requires31.C: New test.
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The parameter use_default_args of coerce_template_parms, introduced way
back in r110693, is effectively unused ever since r7-5536-g3c75aaa3d884ef
removed the last 'coerce_template_parms (..., true, false)' call. So
this patch aims to simplify this function's API by getting rid of this
parameter.
In passing, I noticed we currently define wrapper overloads of
coerce_template_parms that act as defacto default arguments for complain
and require_all_args. It seems cleaner however to just specify real
default arguments for the main overload instead. And I suppose we
should also give c_innermost_t_p the same defaults.
But I'm not sure about defaulting complain to tf_none, which is
inconsistent with how we default it in other places to either tf_error
or tf_warning_or_error (as a convenience for non-SFINAE callers). And
since in general it's probably better to not default complain as that's
a source of SFINAE bugs, and only a handful of callers use this defacto
complain=tf_none default, this patch gets rid of this complain default
(but keeps the require_all_args default).
gcc/cp/ChangeLog:
* constraint.cc (resolve_function_concept_overload): Explicitly
pass complain=tf_none to coerce_template_parms.
(resolve_concept_check): Likewise.
(normalize_concept_check): Likewise.
* cp-tree.h (coerce_template_parms): Declare the main overload
and default its last parameter to true. Remove wrapper overloads.
* pt.cc (determine_specialization): Adjust calls to
coerce_template_parms and coerce_innermost_template_parms after
removing their last parameter.
(coerce_template_args_for_ttp): Likewise.
(coerce_ttp_args_for_tta): Likewise.
(coerce_template_template_parms): Likewise.
(coerce_template_parms): Remove use_default_args parameter and
adjust function comment. Document default argument. Remove
wrapper overloads. No longer static.
(coerce_innermost_template_parms): Remove use_default_args
parameter. Default require_all_args to true.
(lookup_template_class): As with determine_specialization.
(finish_template_variable): Likewise.
(tsubst_decl): Likewise.
(instantiate_alias_template): Likewise.
(fn_type_unification): Likewise.
(resolve_overloaded_unification): Likewise.
(resolve_nondeduced_context): Likewise.
(get_partial_spec_bindings): Likewise.
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... to match the trait's canonical spelling __is_same instead
of its alternative spelling __is_same_as.
gcc/c-family/ChangeLog:
* c-common.cc (c_common_reswords): Use RID_IS_SAME instead of
RID_IS_SAME_AS.
gcc/cp/ChangeLog:
* constraint.cc (diagnose_trait_expr): Use CPTK_IS_SAME instead
of CPTK_IS_SAME_AS.
* cp-trait.def (IS_SAME_AS): Rename to ...
(IS_SAME): ... this.
* pt.cc (alias_ctad_tweaks): Use CPTK_IS_SAME instead of
CPTK_IS_SAME_AS.
* semantics.cc (trait_expr_value): Likewise.
(finish_trait_expr): Likewise.
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Adding a new built-in trait currently involves manual boilerplate
consisting of defining an rid enumerator for the identifier as well as a
corresponding cp_trait_kind enumerator and handling them in various switch
statements, the exact set of which depends on whether the proposed trait
yields (and thus is recognized as) a type or an expression.
To streamline the process, this patch adds a central cp-trait.def file
that tabulates the essential details about each built-in trait (whether
it yields a type or an expression, its code, its spelling and its arity)
and uses this file to automate away the manual boilerplate. It also
migrates all the existing C++-specific built-in traits to use this
approach.
After this change, adding a new built-in trait just entails declaring
it in cp-trait.def and defining its behavior in finish_trait_expr/type
(and handling it in diagnose_trait_expr, if it's an expression-yielding
trait).
gcc/c-family/ChangeLog:
* c-common.cc (c_common_reswords): Use cp/cp-trait.def to handle
C++ traits.
* c-common.h (enum rid): Likewise.
gcc/cp/ChangeLog:
* constraint.cc (diagnose_trait_expr): Likewise.
* cp-objcp-common.cc (names_builtin_p): Likewise.
* cp-tree.h (enum cp_trait_kind): Likewise.
* cxx-pretty-print.cc (pp_cxx_trait): Likewise.
* parser.cc (cp_keyword_starts_decl_specifier_p): Likewise.
(cp_parser_primary_expression): Likewise.
(cp_parser_trait): Likewise.
(cp_parser_simple_type_specifier): Likewise.
* cp-trait.def: New file.
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This implements builtins for std::remove_cv, std::remove_reference and
std::remove_cvref using TRAIT_TYPE from the previous patch.
gcc/c-family/ChangeLog:
* c-common.cc (c_common_reswords): Add __remove_cv,
__remove_reference and __remove_cvref.
* c-common.h (enum rid): Add RID_REMOVE_CV, RID_REMOVE_REFERENCE
and RID_REMOVE_CVREF.
gcc/cp/ChangeLog:
* constraint.cc (diagnose_trait_expr): Handle CPTK_REMOVE_CV,
CPTK_REMOVE_REFERENCE and CPTK_REMOVE_CVREF.
* cp-objcp-common.cc (names_builtin_p): Likewise.
* cp-tree.h (enum cp_trait_kind): Add CPTK_REMOVE_CV,
CPTK_REMOVE_REFERENCE and CPTK_REMOVE_CVREF.
* cxx-pretty-print.cc (pp_cxx_trait): Handle CPTK_REMOVE_CV,
CPTK_REMOVE_REFERENCE and CPTK_REMOVE_CVREF.
* parser.cc (cp_keyword_starts_decl_specifier_p): Return true
for RID_REMOVE_CV, RID_REMOVE_REFERENCE and RID_REMOVE_CVREF.
(cp_parser_trait): Handle RID_REMOVE_CV, RID_REMOVE_REFERENCE
and RID_REMOVE_CVREF.
(cp_parser_simple_type_specifier): Likewise.
* semantics.cc (finish_trait_type): Likewise.
libstdc++-v3/ChangeLog:
* include/bits/unique_ptr.h (unique_ptr<_Tp[], _Dp>): Remove
__remove_cv and use __remove_cv_t instead.
gcc/testsuite/ChangeLog:
* g++.dg/ext/has-builtin-1.C: Test existence of __remove_cv,
__remove_reference and __remove_cvref.
* g++.dg/ext/remove_cv.C: New test.
* g++.dg/ext/remove_reference.C: New test.
* g++.dg/ext/remove_cvref.C: New test.
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In <https://gcc.gnu.org/pipermail/gcc-patches/2022-September/602057.html>
Jason noticed that we quote "nothrow" in diagnostics even though it's
not a keyword in C++. This patch removes the quotes and also drops
"nothrow" from c_keywords.
gcc/c-family/ChangeLog:
* c-format.cc (c_keywords): Drop nothrow.
gcc/cp/ChangeLog:
* constraint.cc (diagnose_trait_expr): Say "nothrow" without quotes
rather than in quotes.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-traits3.C: Adjust expected diagnostics.
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