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remove empty-producing nonterminals

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This commit is contained in:
ceriel
1988-08-23 16:05:19 +00:00
parent f8a9f58006
commit 2deb5cafce
2 changed files with 18 additions and 8 deletions
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10
util/LLgen/src/gencode.c
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@@ -253,6 +253,10 @@ generate(f) p_file f; {
* of synchronisation with the action file
*/
while (p->n_count--) getaction(1);
if (g_gettype(p->n_rule) == EORULE &&
getntparams(p) == 0) {
continue;
}
fprintf(fpars,"L%d_%s (\n",s->o_index,p->n_name);
if (p->n_flags & PARAMS) {
controlline();
@@ -487,12 +491,6 @@ rulecode(p,safety,mustscan,mustpop) register p_gram p; {
getntsafe(n) <= SAFESCANDONE)) {
genpop(findindex(n->n_contains));
}
if (g_gettype(n->n_rule) == EORULE &&
safety <= getntout(n) &&
! g_getnpar(p)) {
safety = getntout(n);
break;
}
fprintf(f,"L%d_%s(\n",g_getcont(p), n->n_name);
if (g_getnpar(p)) {
controlline();