73e7f63ffa
This patch further cleans up the concepts code following the removal of
Concepts TS support:
* concept-ids are now the only kind of "concept check", so we can
simplify some code accordingly. In particular resolve_concept_check
seems like a no-op and can be removed.
* In turn, deduce_constrained_parameter doesn't seem to do anything
interesting.
* In light of the above we might as well inline finish_type_constraints
into its only caller.
* Introduce and use a helper for obtaining the prototype parameter of
a concept, i.e. its first template parameter.
* placeholder_extract_concept_and_args is only ever called on a
concept-id, so it's simpler to inline it into its callers.
* There's no such thing as a template-template-parameter with a
type-constraint, so we can remove such handling from the parser.
This means is_constrained_parameter is currently equivalent to
declares_constrained_type_template_parameter, so let's prefer
to use the latter.
* Remove WILDCARD_DECL and instead use the concept's prototype parameter
as the dummy first argument of a type-constraint during template
argument coercion.
* Remove a redundant concept_definition_p overload.
gcc/cp/ChangeLog:
* constraint.cc (resolve_concept_check): Remove.
(deduce_constrained_parameter): Remove.
(finish_type_constraints): Inline into its only caller
cp_parser_placeholder_type_specifier and remove.
(build_concept_check_arguments): Coding style tweaks.
(build_standard_check): Inline into its only caller ...
(build_concept_check): ... here.
(build_type_constraint): Use the prototype parameter as the
first template argument.
(finish_shorthand_constraint): Remove function concept
handling. Use concept_prototype_parameter.
(placeholder_extract_concept_and_args): Inline into its
callers and remove.
(equivalent_placeholder_constraints): Adjust after
placeholder_extract_concept_and_args removal.
(iterative_hash_placeholder_constraint): Likewise.
* cp-objcp-common.cc (cp_common_init_ts): Remove WILDCARD_DECL
handling.
* cp-tree.def (WILDCARD_DECL): Remove.
* cp-tree.h (WILDCARD_PACK_P): Remove.
(type_uses_auto_or_concept): Remove declaration of nonexistent
function.
(append_type_to_template_for_access_check): Likewise.
(finish_type_constraints): Remove declaration.
(placeholder_extract_concept_and_args): Remove declaration.
(deduce_constrained_parameter): Remove declaration.
(resolve_constraint_check): Remove declaration.
(valid_requirements_p): Remove declaration of nonexistent
function.
(finish_concept_name): Likewise.
(concept_definition_p): Remove redundant overload.
(concept_prototype_parameter): Define.
* cxx-pretty-print.cc (pp_cxx_constrained_type_spec): Adjust
after placeholder_extract_concept_and_args.
* error.cc (dump_decl) <case WILDCARD_DECL>: Remove.
(dump_expr) <case WILDCARD_DECL>: Likewise.
* parser.cc (is_constrained_parameter): Inline into
declares_constrained_type_template_parameter and remove.
(cp_parser_check_constrained_type_parm): Declare static.
(finish_constrained_template_template_parm): Remove.
(cp_parser_constrained_template_template_parm): Remove.
(finish_constrained_parameter): Remove dead code guarded by
cp_parser_constrained_template_template_parm.
(declares_constrained_type_template_parameter): Adjust after
is_constrained_parameter removal.
(declares_constrained_template_template_parameter): Remove.
(cp_parser_placeholder_type_specifier): Adjust after
finish_type_constraints removal. Check the prototype parameter
earlier, before build_type_constraint.
Use concept_prototype_parameter.
(cp_parser_parameter_declaration): Remove dead code guarded by
declares_constrained_template_template_parameter.
* pt.cc (convert_wildcard_argument): Remove.
(convert_template_argument): Remove WILDCARD_DECL handling.
(coerce_template_parameter_pack): Likewise.
(tsubst) <case TEMPLATE_TYPE_PARM>: Likewise.
(type_dependent_expression_p): Likewise.
(make_constrained_placeholder_type): Remove function concept
handling.
(placeholder_type_constraint_dependent_p): Remove WILDCARD_DECL
handling.
Reviewed-by: Jason Merrill <jason@redhat.com>
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