implement most of preprocessor

  - concatenation (##)
  - builtin macros (__FILE__ etc)
  - fails in some edge cases, and code needs cleanup
  - add embedded system include files (stddef.h, stdarg.h for now)
  - can handle stdio.h now

1 files changed, 2 insertions, 1 deletions

diff --git a/lex.h b/lex.h
index 515613f..3c1d431 100644
--- a/lex.h
+++ b/lex.h
@@ -95,6 +95,7 @@ const char *intern(const char *);
 int lex(struct lexer *, struct token *);
 int lexpeek(struct lexer *, struct token *);
 enum typetag parsenumlit(uvlong *, double *, const struct token *, bool ispp);
-void initlexer(struct lexer *, const struct span *span, const char *file, struct arena **tmparena);
+const char *initlexer(struct lexer *, const struct span *span, const char *file);
+void lexerfreetemps(struct lexer *);
 
 /* vim:set ts=3 sw=3 expandtab: */