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* src/derives.c (print_derives): Be sure to use >= 0', not > 0',

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when walking through ritem, even via rule->rhs.
* src/reduce.c (dump_grammar, useful_production, reduce_output)
(useful_production, useless_nonterminals): Likewise.
(reduce_grammar_tables): Likewise, plus update nritems.
* src/nullable.c (set_nullable): Likewise.
* src/lalr.c (build_relations): Likewise.
* tests/sets.at (Nullable): Adjust.
Fortunately, now, the $axiom is no longer nullable.
This commit is contained in:
Akim Demaille
2001-12-29 14:15:33 +00:00
parent 9e7f6bbd59
commit 3d4daee374
6 changed files with 32 additions and 17 deletions
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6
src/nullable.c
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@@ -71,19 +71,19 @@ set_nullable (void)
for (ruleno = 1; ruleno < nrules + 1; ++ruleno)
if (rule_table[ruleno].useful)
{
if (ritem[rule_table[ruleno].rhs] > 0)
if (ritem[rule_table[ruleno].rhs] >= 0)
{
/* This rule has a non empty RHS. */
short *r;
int any_tokens = 0;
for (r = ritem + rule_table[ruleno].rhs; *r > 0; ++r)
for (r = &ritem[rule_table[ruleno].rhs]; *r >= 0; ++r)
if (ISTOKEN (*r))
any_tokens = 1;
/* This rule has only nonterminals: schedule it for the second
pass. */
if (!any_tokens)
for (r = ritem + rule_table[ruleno].rhs; *r > 0; ++r)
for (r = &ritem[rule_table[ruleno].rhs]; *r >= 0; ++r)
{
rcount[ruleno]++;
p->next = rsets[*r];