cppexp.c: Don't worry about pfile->skipping.

        * cppexp.c: Don't worry about pfile->skipping.
        * cpplib.c (struct if_stack): Make was_skipping unsigned char.
        (cpp_handle_directive): Save pfile->skipping in struct cpp_buffer
        for handled directives.
        (skip_rest_of_line): Use _cpp_lex_token after popping contexts
        and releasing lookaheads.
        (do_ifdef, do_ifndef, do_if): Use buffer->was_skipping.
        (do_else, do_elif, push_conditional): Update logic.
        (do_endif): Set buffer->was_skipping rather than pfile->skipping.
        (unwind_if_stack): Inline into cpp_pop_buffer.
        (cpp_push_buffer): Clear ifs->was_skipping for cpp_handle_directive.
        * cpplex.c (_cpp_lex_token): Clear skipping on EOF.  Handle
        multiple-include optimisation.
        * cpplib.h (struct cpp_buffer): New member was_skipping.
        * cppmacro.c (_cpp_get_token): Loop whilst pfile->skipping.  This
        works because skipping == 0 in directives.
        (_cpp_release_lookahead): Renamed from release_lookahead.
        (cpp_get_token): No need to check skipping as _cpp_get_token does
        this for us.  No need to handle MI optimisation.

From-SVN: r37404

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/cpplib.h b/gcc/cpplib.h
index d677396..8b6560d 100644
--- a/gcc/cpplib.h
+++ b/gcc/cpplib.h
@@ -290,6 +290,9 @@ struct cpp_buffer
      for preprocessed input, command line directives, and _Pragma
      buffers.  */
   unsigned char from_stage3;
+
+  /* Temporary storage for pfile->skipping whilst in a directive.  */
+  unsigned char was_skipping;
 };
 
 /* Maximum nesting of cpp_buffers.  We use a static limit, partly for