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Lemon update 2016-08-16 16:46:40 on branch trunk

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— Fix a bug in destructorprocessing of Lemon. That has no impact on the SQLite grammar. The bug was introduced by prior work to optimize the Lemon-generated parser used by SQLite. (user: drh)
This commit is contained in:
Marisa Heit 2016-10-13 22:23:28 -05:00
parent 3b1a048885
commit 696beca40f
1 changed files with 4 additions and 2 deletions
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6
tools/lemon/lemon.c
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@ -167,7 +167,8 @@ struct symbol {
int useCnt; /* Number of times used */ int useCnt; /* Number of times used */
char *destructor; /* Code which executes whenever this symbol is char *destructor; /* Code which executes whenever this symbol is
** popped from the stack during error processing */ ** 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 char *datatype; /* The data type of information held by this
** object. Only used if type==NONTERMINAL */ ** object. Only used if type==NONTERMINAL */
int dtnum; /* The data type number. In the parser, the value int dtnum; /* The data type number. In the parser, the value
@ -4387,6 +4388,7 @@ void ReportTable(
for(i=0; i<lemp->nsymbol; i++){ for(i=0; i<lemp->nsymbol; i++){
struct symbol *sp = lemp->symbols[i]; struct symbol *sp = lemp->symbols[i];
if( sp==0 || sp->type==TERMINAL || sp->destructor==0 ) continue; 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++; fprintf(out," case %d: /* %s */\n", sp->index, sp->name); lineno++;
/* Combine duplicate destructors into a single case */ /* Combine duplicate destructors into a single case */
@ -4397,7 +4399,7 @@ void ReportTable(
&& strcmp(sp->destructor,sp2->destructor)==0 ){ && strcmp(sp->destructor,sp2->destructor)==0 ){
fprintf(out," case %d: /* %s */\n", fprintf(out," case %d: /* %s */\n",
sp2->index, sp2->name); lineno++; sp2->index, sp2->name); lineno++;
sp2->destructor = 0; sp2->destLineno = -1; /* Avoid emitting this destructor again */
} }
} }