re PR c++/23333 (accepts invalid pure specifier)

re PR c++/23333 (accepts invalid pure specifier)

2005-12-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>

	PR c++/23333
	* include/cpplib.h: Add PURE_ZERO to flags for the cpp_token structure.

	* c-lex.c (c_lex_with_flags): Add PURE_ZERO to cpp_flags if
	number is a single digit '0'.

	* parser.c (cp_parser_pure_specifier): Check for PURE_ZERO to
	identify a single '0'.

	* g++.dg/parse/error25.C: Add more tests.

From-SVN: r108947