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A common pattern before C++17 is the generator function, used to avoid having to specify the type of a container element by using a function call to get type deduction; for example, std::make_pair. C++17 added class type argument deduction, making generator functions unnecessary for many uses, but GCC won't be written in C++17 for years yet. gcc/cp/ChangeLog: * cp-tree.h (struct type_identity): New. (make_temp_override): New. * decl.c (grokdeclarator): Use it. * except.c (maybe_noexcept_warning): Use it. * parser.c (cp_parser_enum_specifier): Use it. (cp_parser_parameter_declaration_clause): Use it. (cp_parser_gnu_attributes_opt): Use it. (cp_parser_std_attribute): Use it.
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