* c-common.h (c_parse_error): Declare it.
	* c-common.c (c_parse_error): New function.
	* c-parse.y (yyerror): Use it.

	* parser.c (struct cp_parser): Add in_template_argument_list_p.
	(cp_parser_error): Use c_parse_error.
	(cp_parser_name_lookup_error): New function.
	(cp_parser_new): Initialize it.
	(cp_parser_declarator): Add parenthesized_p parameter.
	(cp_parser_nested_name_specifier_opt): Use
	cp_parser_name_lookup_error.
	(cp_parser_parenthesized_expression_list): Improve comments.
	(cp_parser_condition): Adjust call to cp_parser_declarator.
	(cp_parser_template_parameter): Adjust call to
	cp_parser_parameter_declaration.
	(cp_parser_template_argument_list): Set
	in_template_argument_list_p.
	(cp_parser_explicit_instantiation): Adjust call to
	cp_parser_declarator.
	(cp_parser_simple_type_specifier): Remove unncessary code.
	(cp_parser_using_declaration): Use cp_parser_name_lookup_error.
	(cp_parser_init_declarator): Handle member function definitions.
	(cp_parser_direct_declarator): Adjust call to
	cp_parser_declarator.
	(cp_parser_type_id): Adjust call to cp_parser_declarator.
	(cp_parser_parameter_declaration_list): Avoid backtracking where
	possible.
	(cp_parser_parameter_declaration): Add parenthesized_p parameter.
	(cp_parser_function_definition): Remove.
	(cp_parser_member_declaration): Do not backtrack to look for
	function definitions.
	(cp_parser_exception_declaration): Adjust call to
	cp_parser_declarator.
	(cp_parser_single_declaration): Handle function definitions via
	cp_parser_init_declarator.
	(cp_parser_save_member_function_body): New function.

	PR c++/10779
	PR c++/12160
	* g++.dg/parse/error3.C: New test.
	* g++.dg/parse/error4.C: Likewise.
	* g++.dg/abi/mangle4.C: Tweak error messages.
	* g++.dg/lookup/using5.C: Likewise.
	* g++.dg/other/error2.C: Likewise.
	* g++.dg/parse/typename5.C: Likewise.
	* g++.dg/parse/undefined1.C: Likewise.
	* g++.dg/template/arg2.C: Likewise.
	* g++.dg/template/ttp3.C: Likewise.
	* g++.dg/template/type1.C: Likewise.
	* g++.old-deja/g++.other/crash32.C: Likewise.
	* g++.old-djea/g++.pt/defarg8.C: Likewise.

From-SVN: r74624