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Overview
| Comment: | Fix a bug in lemon that leads to an assertion fault given an invalid grammar. The bug and this fix do not effect on SQLite. Ticket #2107. (CVS 3528) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
f2ad230f6dce98d664370d77845b5f58 |
| User & Date: | drh 2006-12-14 01:06:22 |
Context
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2006-12-16
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| 16:25 | Query optimizer enhancement: In "FROM a,b,c left join d" allow the C table to be reordered with A and B. This used to be the case but the capability was removed by (3203) and (3052) in response to ticket #1652. This change restores the capability. (CVS 3529) (check-in: 7393c81b user: drh tags: trunk) | |
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2006-12-14
| ||
| 01:06 | Fix a bug in lemon that leads to an assertion fault given an invalid grammar. The bug and this fix do not effect on SQLite. Ticket #2107. (CVS 3528) (check-in: f2ad230f user: drh tags: trunk) | |
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2006-11-30
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| 13:06 | Change the table_info pragma so that it returns NULL for the default value if there is no default value. Ticket #2078. (CVS 3527) (check-in: 5f21c3a5 user: drh tags: trunk) | |
Changes
Changes to tool/lemon.c.
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struct action *ap1;
struct action *ap2;
{
int rc;
rc = ap1->sp->index - ap2->sp->index;
if( rc==0 ) rc = (int)ap1->type - (int)ap2->type;
if( rc==0 ){
assert( ap1->type==REDUCE || ap1->type==RD_RESOLVED || ap1->type==CONFLICT);
assert( ap2->type==REDUCE || ap2->type==RD_RESOLVED || ap2->type==CONFLICT);
rc = ap1->x.rp->index - ap2->x.rp->index;
}
return rc;
}
/* Sort parser actions */
struct action *Action_sort(ap)
................................................................................
struct action *apx;
struct action *apy;
struct symbol *errsym; /* The error symbol (if defined. NULL otherwise) */
{
struct symbol *spx, *spy;
int errcnt = 0;
assert( apx->sp==apy->sp ); /* Otherwise there would be no conflict */
if( apx->type==SHIFT && apy->type==REDUCE ){
spx = apx->sp;
spy = apy->x.rp->precsym;
if( spy==0 || spx->prec<0 || spy->prec<0 ){
/* Not enough precedence information. */
apy->type = CONFLICT;
errcnt++;
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struct action *ap1;
struct action *ap2;
{
int rc;
rc = ap1->sp->index - ap2->sp->index;
if( rc==0 ) rc = (int)ap1->type - (int)ap2->type;
if( rc==0 ){
rc = ap1->x.rp->index - ap2->x.rp->index;
}
return rc;
}
/* Sort parser actions */
struct action *Action_sort(ap)
................................................................................
struct action *apx;
struct action *apy;
struct symbol *errsym; /* The error symbol (if defined. NULL otherwise) */
{
struct symbol *spx, *spy;
int errcnt = 0;
assert( apx->sp==apy->sp ); /* Otherwise there would be no conflict */
if( apx->type==SHIFT && apy->type==SHIFT ){
apy->type = CONFLICT;
errcnt++;
}
if( apx->type==SHIFT && apy->type==REDUCE ){
spx = apx->sp;
spy = apy->x.rp->precsym;
if( spy==0 || spx->prec<0 || spy->prec<0 ){
/* Not enough precedence information. */
apy->type = CONFLICT;
errcnt++;
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