(cpp_parse_expr): Pass skip_evaluation to cpp_lex.
Abort if cpp_lex returns NAME.
(cpp_lex): Optionally warn about undefined identifiers that evaluate to 0.
From-SVN: r13880
(cpp_lex): Invalid multibyte characters are errors if pedantic.
(cpp_parse_escape): Character constants that do not fit are errors if pedantic.
From-SVN: r13726
* cppexp.c (cpp_lex): Do cpp_pop_buffer after CPP_POP so retried
cpp_skip_hspace will actually work.
* cppexp.c (SKIP_OPERAND): New macro.
(cpp_parse_expr): Suppress evaluation and diagnostics in
unevaluated subexpressions.
From-SVN: r11034
