parser.c (cp_parser_template_id): Parse tentatively `[:' after a template name as...

parser.c (cp_parser_template_id): Parse tentatively `[:' after a template name as it was `<::' (digraph typo).

	* parser.c (cp_parser_template_id): Parse tentatively `[:' after a
	template name as it was `<::' (digraph typo).
	(cp_parser_nth_token_starts_template_argument_list_p): New function.
	(cp_parser_id_expression): Use it.
	(cp_parser_nested_name_specifier_opt): Likewise.
	(cp_parser_template_name): Likewise.
	(cp_parser_class_name): Likewise.
	(cp_lexer_get_preprocessor_token): Use c_lex_with_flags.

From-SVN: r76845