From e3cf93ddb677fe9482563a5687d3bf3e05ca0407 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 9 Mar 2000 10:57:37 -0300
Subject: first implementation of "threaded code" for boolean operations

---
 lparser.h | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'lparser.h')

diff --git a/lparser.h b/lparser.h
index adc7f012..01332478 100644
--- a/lparser.h
+++ b/lparser.h
@@ -47,15 +47,21 @@
 */
 
 typedef enum {
-  VGLOBAL,  /* info is constant index of global name */
-  VLOCAL,   /* info is stack index */
+  VGLOBAL,
+  VLOCAL,
   VINDEXED,
-  VEXP      /* info is jump target if exp has internal jumps */
+  VEXP
 } expkind;
 
 typedef struct expdesc {
   expkind k;
-  int info;
+  union {
+    int index;  /* VGLOBAL: `kstr' index of global name; VLOCAL: stack index */
+    struct {
+      int t;  /* patch list of `exit when true' */
+      int f;  /* patch list of `exit when false' */
+    } l;
+  } u;
 } expdesc;
 
 
-- 
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