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warnings: raise warning for useless printers or destructors

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* src/scan-code.h (code_props): Add field 'is_used'.
(CODE_PROPS_NONE_INIT): Adjust.
* src/scan-code.l (code_props_plain_init, code_props_symbol_action_init)
(code_props_rule_action_init): Instead of implementing several
times the initialization of the code_props structures,
use code_props_none_init.
* src/symtab.c (symbol_check_defined): If a symbol does not have a
destructor (resp. printer) but has a type which has a destructor (resp.
printer), then set field 'is_used' to true.
(semantic_type_check_defined): If a type has a destructor (resp. printer)
but all symbols of this type have already a destructor (resp. printer),
then raise a warning.
* tests/input.at (Useless printers or destructors): New.

Signed-off-by: Akim Demaille <akim@lrde.epita.fr>
This commit is contained in:
Victor Santet
2012-06-14 14:20:07 +02:00
committed by Akim Demaille
parent 9641b918ba
commit ea9a35c605
5 changed files with 96 additions and 10 deletions
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10
src/scan-code.l
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@@ -888,24 +888,20 @@ void
code_props_plain_init (code_props *self, char const *code,
location code_loc)
{
code_props_none_init (self);
self->kind = CODE_PROPS_PLAIN;
self->code = code;
self->location = code_loc;
self->is_value_used = false;
self->rule = NULL;
self->named_ref = NULL;
}
void
code_props_symbol_action_init (code_props *self, char const *code,
location code_loc)
{
code_props_none_init (self);
self->kind = CODE_PROPS_SYMBOL_ACTION;
self->code = code;
self->location = code_loc;
self->is_value_used = false;
self->rule = NULL;
self->named_ref = NULL;
}
void
@@ -913,10 +909,10 @@ code_props_rule_action_init (code_props *self, char const *code,
location code_loc, symbol_list *rule,
named_ref *name, bool is_predicate)
{
code_props_none_init (self);
self->kind = CODE_PROPS_RULE_ACTION;
self->code = code;
self->location = code_loc;
self->is_value_used = false;
self->rule = rule;
self->named_ref = name;
self->is_predicate = is_predicate;