gcc/
	* tree.h (tree_decl_common::lang_flag_8): New.
	* c-common.c (c_common_reswords): Include "constexpr" as C++0x
	keyword. 
	* c-common.h (RID_CONSTEXPR): New.

gcc/cp/
	* decl.c (check_for_uninitialized_const_var): Check constexpr
	variables too.
	(build_ptrmemfunc_type): Make the result a literal type.
	(build_ptrmem_type): Likewise.
	(grokdeclarator): Handle `constexpr'.
	(check_tag_decl): Reject `constexpr'.
	(check_function_type): Check constexpr functions.
	* cp-tree.h (ds_constexpr): New cp_decl_spec enumerator.
	(CLASSTYPE_LITERAL_P): New.
	(lang_type_class::is_literal): New.
	(lang_type_class::dummy): Adjust width.
	(literal_type_p): Declare.
	* parser.c (cp_parser_check_decl_spec): Print it.
	(cp_parser_decl_specifier_seq): Accept "constexpr".
	* semantics.c (validate_constexpr_fundecl): Define.
	(literal_type_p): Define.

From-SVN: r152358