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b87d79e640
Implement defaulted/deleted functions as per N2346
* cp-tree.h (struct lang_decl_flags): Add defaulted_p bitfield.
(DECL_DELETED_FN): New macro.
(DECL_DEFAULTED_FN): New macro.
* class.c (user_provided_p): New fn.
(defaultable_fn_p): New fn.
(type_has_user_provided_constructor): New fn.
(type_has_user_provided_default_constructor): New fn.
(check_methods): A defaulted fn is still trivial.
(check_bases_and_members): Likewise.
* decl.c (grok_special_member_properties): Likewise.
(duplicate_decls): Complain about redeclaring a function as deleted.
(start_decl): initialized==2 means deleted.
(cp_finish_decl): Handle deleted/defaulted semantics.
* decl2.c (grokfield): Likewise.
(mark_used): Check DECL_DEFAULTED_FN instead of DECL_ARTIFICIAL.
Complain about using a deleted fn.
* init.c (build_value_init_1): Use type_has_user_provided_constructor.
(perform_member_init): Check for a user-provided default constructor
even if TYPE_NEEDS_CONSTRUCTING.
(build_new_1): Likewise.
* call.c (build_over_call): Don't call mark_used twice.
* method.c (implicitly_declare_fn): Set DECL_DEFAULTED_FN.
* search.c (check_final_overrider): Check for deleted mismatch.
* parser.c (cp_parser_init_declarator): Tell start_decl about =delete.
(cp_parser_pure_specifier): Handle =default and =delete.
* error.c (maybe_warn_cpp0x): Suggest -std=gnu++0x as well.
From-SVN: r138123
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