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2012-04-23   Ollie Wild  <aaw@google.com>

	* include/cpplib.h (struct cpp_options): Add new field,
	warn_literal_suffix.
	(CPP_W_LITERAL_SUFFIX): New enum.
	* init.c (cpp_create_reader): Default initialization of
	warn_literal_suffix.
	* lex.c (lex_raw_string): Treat user-defined literals which don't
	begin with '_' as separate tokens and produce a warning.
	(lex_string): Ditto.

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