decl.c (build_enumerator): Use add_double and int_fits_type_p instead of cp_build_bin...

decl.c (build_enumerator): Use add_double and int_fits_type_p instead of cp_build_binary_op...

cp:
	* decl.c (build_enumerator): Use add_double and int_fits_type_p
	instead of cp_build_binary_op, to avoid creating short-lived trees.
	* parser.c (cp_parse_type_specifier <RID_ENUM>): Use two-token
	lookahead instead of backtracking.  Move some code to avoid a
	conditional branch.
	(cp_parser_enum_specifier): Avoid duplication of effort with caller.
	Use cp_lexer_next_token_is/cp_lexer_next_token_is_not as appropriate.
	(cp_parser_enumerator_list, cp_parser_enumerator_definition):
	Use cp_lexer_next_token_is/cp_lexer_next_token_is_not as appropriate.
testsuite:
	* g++.old-deja/g++.other/enum2.C: Move dg-error markers to
	reflect changed line numbering of diagnostics.

From-SVN: r87121