From 73c04db73163d1d2719bb97a6b8c133065df75c3 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Mon, 18 May 2020 18:22:42 -0700
Subject: feat: macro expansion and constant evaluation prototype

---
 sys/cmd/cc/cc.h | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'sys/cmd/cc/cc.h')

diff --git a/sys/cmd/cc/cc.h b/sys/cmd/cc/cc.h
index 9871e99..84f173f 100644
--- a/sys/cmd/cc/cc.h
+++ b/sys/cmd/cc/cc.h
@@ -100,6 +100,7 @@ void errorat(Pos x, byte *fmt, ...);
     DIRECTIVE(Ddefine,"define", ppdef)      \
     DIRECTIVE(Dundef,"undef", ppund)        \
     DIRECTIVE(Dif,"if", ppif0)              \
+    DIRECTIVE(Delif,"elif", ppif1)          \
     DIRECTIVE(Delse, "else", ppif1)         \
     DIRECTIVE(Difdef,"ifdef", ppif2)        \
     DIRECTIVE(Difndef,"ifndef", ppif3)      \
@@ -184,6 +185,8 @@ enum
     Vusgn  = iota(12),
     Vfloat = iota(13),
     Vstr   = iota(14),
+
+    Vmask  = Vchar - 1,
 };
 #undef TOK
 
@@ -221,6 +224,17 @@ struct Sym
     };
 };
 
+struct SymTab
+{
+  int32  n_buckets;
+  int32  size;
+  int32  n_occupied; 
+  int32  upper_bound;
+  int32  *flags;
+  string *keys;
+  Sym    **vals;
+};
+
 Sym  *lookup(SymTab *tab, string ident);
 Sym  *define(SymTab *tab, string ident, int kind);
 
@@ -228,7 +242,7 @@ struct Lexer
 {
     Pos     pos;
     Io     *io;
-    SymTab *sym;
+    SymTab sym;
     byte   *b;
     byte    buf[2*1024];
 };
-- 
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