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Fix a bug in destructor processing of Lemon. That has no impact on the

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SQLite grammar.  The bug was introduced by prior work to optimize the
Lemon-generated parser used by SQLite.

FossilOrigin-Name: f9035b8e2ea331801402bcb62b203ab092949770
This commit is contained in:
drh
2016-08-16 16:46:40 +00:00
parent 460d38f15e
commit 0f832ddc06
3 changed files with 12 additions and 10 deletions
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6
tool/lemon.c
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@ -263,7 +263,8 @@ struct symbol {
int useCnt; /* Number of times used */
char *destructor; /* Code which executes whenever this symbol is
** popped from the stack during error processing */
int destLineno; /* Line number for start of destructor */
int destLineno; /* Line number for start of destructor. Set to
** -1 for duplicate destructors. */
char *datatype; /* The data type of information held by this
** object. Only used if type==NONTERMINAL */
int dtnum; /* The data type number. In the parser, the value
@ -4385,6 +4386,7 @@ void ReportTable(
for(i=0; i<lemp->nsymbol; i++){
struct symbol *sp = lemp->symbols[i];
if( sp==0 || sp->type==TERMINAL || sp->destructor==0 ) continue;
if( sp->destLineno<0 ) continue; /* Already emitted */
fprintf(out," case %d: /* %s */\n", sp->index, sp->name); lineno++;
/* Combine duplicate destructors into a single case */
@ -4395,7 +4397,7 @@ void ReportTable(
&& strcmp(sp->destructor,sp2->destructor)==0 ){
fprintf(out," case %d: /* %s */\n",
sp2->index, sp2->name); lineno++;
sp2->destructor = 0;
sp2->destLineno = -1; /* Avoid emitting this destructor again */
}
}