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* src/reader.c (symbol_should_be_used): Renamed from symbol_typed_p.

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All used changed.  Check whether the symbol has a destructor,
not whether it is typed.
* tests/input.at (AT_CHECK_UNUSED_VALUES): Add a destructor, so
that the values are still reported as unused.  All line numbers
adjusted.
This commit is contained in:
Paul Eggert
2006-01-27 22:51:00 +00:00
parent bf8b3d9821
commit d40ba6c272
3 changed files with 48 additions and 39 deletions
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19
src/reader.c
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@@ -212,17 +212,16 @@ grammar_current_rule_begin (symbol *lhs, location loc)
}
/*-----------------------------------------------------------------.
| A symbol is typed if it has a declared %type, or if it is a |
| mid-rule symbol (i.e., the generated LHS replacing a mid-rule |
| action) that was assigned to, as in `exp: { $$ = 1; } { $$ = $1; |
| }'. |
`-----------------------------------------------------------------*/
/*----------------------------------------------------------------------.
| A symbol should be used if it has a destructor, or if it is a |
| mid-rule symbol (i.e., the generated LHS replacing a mid-rule |
| action) that was assigned to, as in "exp: { $$ = 1; } { $$ = $1; }". |
`----------------------------------------------------------------------*/
static bool
symbol_typed_p (const symbol_list *s)
symbol_should_be_used (symbol_list const *s)
{
return (s->sym->type_name
return (s->sym->destructor
|| (s->midrule && s->midrule->used));
}
@@ -261,13 +260,13 @@ grammar_rule_check (const symbol_list *r)
_("empty rule for typed nonterminal, and no action"));
}
/* Check that typed symbol values are used. */
/* Check that symbol values that should be used are in fact used. */
{
symbol_list const *l = r;
int n = 0;
for (; l && l->sym; l = l->next, ++n)
if (! (l->used
|| !symbol_typed_p (l)
|| !symbol_should_be_used (l)
/* The default action, $$ = $1, `uses' both. */
|| (!r->action && (n == 0 || n == 1))))
{