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Here the problem is that if the noexcept specifier is used in the context of a const member function, const is not considered for the member variables, leading to a bogus error. g's const makes its 'this' const, so the first overload of f should be selected. In cp_parser_noexcept_specification_opt we inject 'this', but always unqualified: 25737 if (current_class_type) 25738 inject_this_parameter (current_class_type, TYPE_UNQUALIFIED); so we need to pass the function's qualifiers down here. In cp_parser_direct_declarator it's easy: use the just parsed cv_quals, in cp_parser_late_noexcept_specifier look at the 'this' parameter to figure it out. 2020-01-22 Marek Polacek <polacek@redhat.com> PR c++/92907 - noexcept does not consider "const" in member functions. * parser.c (cp_parser_lambda_declarator_opt): Pass the proper qualifiers to cp_parser_exception_specification_opt. (cp_parser_direct_declarator): Pass the function qualifiers to cp_parser_exception_specification_opt. (cp_parser_class_specifier_1): Pass the function declaration to cp_parser_late_noexcept_specifier. (cp_parser_late_noexcept_specifier): Add a tree parameter. Use it to pass the qualifiers of the function to cp_parser_noexcept_specification_opt. (cp_parser_noexcept_specification_opt): New cp_cv_quals parameter. Use it in inject_this_parameter. (cp_parser_exception_specification_opt): New cp_cv_quals parameter. Use it. (cp_parser_transaction): Pass TYPE_UNQUALIFIED to cp_parser_noexcept_specification_opt. (cp_parser_transaction_expression): Likewise. * g++.dg/cpp0x/noexcept56.C: New test.
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