cp-tree.h (IDENTIFIER_TYPENAME_P): Use a flag, not strncmp.

cp-tree.h (IDENTIFIER_TYPENAME_P): Use a flag, not strncmp.

	* cp-tree.h (IDENTIFIER_TYPENAME_P): Use a flag, not strncmp.
	(DECL_CONV_FN_P): Simplify.
	(DECL_OPERATOR): Remove.
	(language_to_string): Declare.
	* decl.c (duplicate_decls): Fix typo in comment.
	(grokdeclarator): Adjust use of IDENTIFIER_TYPENAME_P.
	(grok_op_properties): Use DECL_CONV_FN_P instead of
	IDENTIFIER_TYPENAME_P.
	* dump.c (dequeue_and_dump): Dump the language linkage of
	declarations.
	* error.c (language_to_string): Give it external linkage.
	* method.c (build_typename_overload): Set IDENTIFIER_TYPENAME_P.
	(implicitly_declare_fn): Set DECL_LANGUAGE.
	* pt.c (check_explicit_specialization): Use DECL_CONV_FN_P, not
	IDENTIFIER_TYPENAME_P.
	(tsubst_decl): Likewise.
	(tsubst_copy): Adjust use of IDENTIFIER_TYPENAME_P.
	* semantics.c (finish_member_declaration): Don't mark members of
	classes declared in an extern "C" region as extern "C".

From-SVN: r34095