Implement N4197 - Adding u8 character literals

Implement N4197 - Adding u8 character literals

libcpp:

2015-06-30  Edward Smith-Rowland  <3dw4rd@verizon.net>

	Implement N4197 - Adding u8 character literals
	* include/cpplib.h (UTF8CHAR, UTF8CHAR_USERDEF): New cpp tokens;
	(struct cpp_options): Add utf8_char_literals.
	* init.c (struct lang_flags): Add utf8_char_literals;
	(struct lang_flags lang_defaults): Add column for utf8_char_literals.
	* macro.c (stringify_arg()): Treat CPP_UTF8CHAR token;
	* expr.c (cpp_userdef_char_remove_type(), cpp_userdef_char_add_type()):
	Treat CPP_UTF8CHAR_USERDEF, CPP_UTF8CHAR tokens;
	(cpp_userdef_char_p()): Treat CPP_UTF8CHAR_USERDEF token;
	(eval_token(), _cpp_parse_expr()): Treat CPP_UTF8CHAR token.
	* lex.c (lex_string(), _cpp_lex_direct()): Include CPP_UTF8CHAR tokens.
	* charset.c (converter_for_type(), cpp_interpret_charconst()):
	Treat CPP_UTF8CHAR token.

gcc/c-family:

2015-06-30  Edward Smith-Rowland  <3dw4rd@verizon.net>

	Implement N4197 - Adding u8 character literals
	* c-family/c-ada-spec.c (print_ada_macros()): Treat CPP_UTF8CHAR
	like CPP_CHAR.
	* c-family/c-common.c (c_parse_error()): print CPP_UTF8CHAR
	and CPP_UTF8CHAR_USERDEF tokens.
	* c-family/c-lex.c (c_lex_with_flags()): Treat CPP_UTF8CHAR_USERDEF
	and CPP_UTF8CHAR tokens; (lex_charconst()): Treat CPP_UTF8CHAR token.

gcc/cp:

2015-06-30  Edward Smith-Rowland  <3dw4rd@verizon.net>

	Implement N4197 - Adding u8 character literals
	* parser.c (cp_parser_primary_expression()): Treat CPP_UTF8CHAR
	and CPP_UTF8CHAR_USERDEF tokens;
	(cp_parser_parenthesized_expression_list()): Treat CPP_UTF8CHAR token.

gcc/testsuite:

2015-06-30  Edward Smith-Rowland  <3dw4rd@verizon.net>

	Implement N4197 - Adding u8 character literals
	* g++.dg/cpp1z/utf8.C: New.
	* g++.dg/cpp1z/utf8-neg.C: New.
	* g++.dg/cpp1z/udlit-utf8char.C: New.

From-SVN: r225185