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06-fyi-fix-gawk.patch
From: |
Akim Demaille |
Subject: |
06-fyi-fix-gawk.patch |
Date: |
Sat, 29 Dec 2001 15:13:42 +0100 |
Index: ChangeLog
from Akim Demaille <address@hidden>
Fix the `GAWK Grammar' failure.
* src/LR0.c (final_state): Initialize to -1 so that we do compute
the reductions of the first state which was mistakenly confused
with the final state because precisely final_state was initialized
to 0.
* tests/sets.at (Nullable): Adjust: state 0 does have lookaheads,
now noticed by Bison.
* tests/regression.at (Rule Line Numbers): Adjust: state 0 does
have a reduction on $default.
Index: src/LR0.c
--- src/LR0.c Fri, 28 Dec 2001 14:44:45 +0100 akim
+++ src/LR0.c Fri, 28 Dec 2001 15:12:20 +0100 akim
@@ -34,7 +34,14 @@
#include "reduce.h"
int nstates;
-int final_state;
+/* Initialize the final state to -1, otherwise, it might be set to 0
+ by default, and since we don't compute the reductions of the final
+ state, we end up not computing the reductions of the initial state,
+ which is of course needed.
+
+ FINAL_STATE is properly set by new_state when it recognizes the
+ accessing symbol: EOF. */
+int final_state = -1;
static state_t *first_state = NULL;
static state_t *this_state = NULL;
Index: tests/sets.at
--- tests/sets.at Fri, 28 Dec 2001 15:11:05 +0100 akim
+++ tests/sets.at Fri, 28 Dec 2001 15:16:24 +0100 akim
@@ -158,7 +158,11 @@ transpose: output
0:
Lookaheads: BEGIN
-State 0: 0 lookaheads
+State 0: 1 lookaheads
+ on 0 ($) -> rule -4
+ on 1 (error) -> rule -4
+ on 2 ($undefined.) -> rule -4
+ on 3 ('e') -> rule -4
State 1: 0 lookaheads
State 2: 0 lookaheads
State 3: 0 lookaheads
Index: tests/regression.at
--- tests/regression.at Thu, 27 Dec 2001 17:21:22 +0100 akim
+++ tests/regression.at Fri, 28 Dec 2001 15:15:36 +0100 akim
@@ -328,6 +328,8 @@ expr:
'a' shift, and go to state 1
+ $default reduce using rule 3 (@2)
+
expr go to state 2
@2 go to state 3
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