WIP symsym

1 files changed, 20 insertions, 10 deletions

diff --git a/src/prc1/pop.c b/src/prc1/pop.c
index ba2f3a1..977129e 100644
--- a/src/prc1/pop.c
+++ b/src/prc1/pop.c
@@ -1,20 +1,28 @@
 #include "prv.h"
+#include "dbg.h"
 #include <stdlib.h>
 
 int pop(const struct lex *l, struct prv *p)
 {
     size_t n;
-    struct pos *pos = NULL;
+    struct pos *pos;
+    int (*end)(const struct lex *, struct prv *);
+    const char *name;
 
     if (!p->n)
     {
         fprintf(stderr, "%s: underflow\n", __func__);
         return -1;
     }
-    else if (!(n = p->n - 1))
+
+    pos = &p->pos[p->i];
+    end = pos->end;
+    name = pos->name;
+
+    if (!(n = p->n - 1))
     {
         free(p->pos);
-        p->pos = NULL;
+        p->pos = pos = NULL;
     }
     else if (!(pos = realloc(p->pos, n * sizeof *pos)))
     {
@@ -22,16 +30,18 @@ int pop(const struct lex *l, struct prv *p)
         return -1;
     }
 
+    ddbg("pop rule %s [%zu]", name, p->i);
+
+    if (end)
+        ddbg(", end=%p", end);
+
+    ddbg("\n");
     p->pos = pos;
     p->n = n;
+    p->i--;
 
-    if (p->n)
-    {
-        const struct pos *old = &p->pos[--p->i];
-
-        if (old->end && old->end(l, p))
-            return -1;
-    }
+    if (end)
+        return end(l, p);
 
     return 0;
 }