Thread overview
with statement doesn't call struct destructor?
Jun 08, 2011
simendsjo
Jun 08, 2011
Jonathan M Davis
Jun 08, 2011
simendsjo
June 08, 2011
import std.stdio;
void main() {
    struct S {
        this(bool a) { writeln(" this"); }
        ~this() { writeln(" ~this"); }
    }

    writeln("scoped:");
    {
        auto s = S(true);
    }

    writeln("with:");
    with(S(true)) {
    }
}

Output:

scoped:
 this
 ~this
with:
 this
June 08, 2011
On 2011-06-08 13:31, simendsjo wrote:
> import std.stdio;
> void main() {
> struct S {
> this(bool a) { writeln(" this"); }
> ~this() { writeln(" ~this"); }
> }
> 
> writeln("scoped:");
> {
> auto s = S(true);
> }
> 
> writeln("with:");
> with(S(true)) {
> }
> }
> 
> Output:
> 
> scoped:
> this
> ~this
> with:
> this

Report it on bugzilla. Walter has been fixing issues with destructors for temporaries lately. They've been buggy for a while. A fair bit of the problem was fixed in dmd 2.053 but not all of it. If you're not using 2.053, then that's probably why the code is broken. If you are using 2.053, then Walter needs to be aware that that particular use case hasn't been fixed yet.

- Jonathan M Davis
June 08, 2011
On 08.06.2011 23:14, Jonathan M Davis wrote:
> On 2011-06-08 13:31, simendsjo wrote:
>> import std.stdio;
>> void main() {
>> struct S {
>> this(bool a) { writeln(" this"); }
>> ~this() { writeln(" ~this"); }
>> }
>>
>> writeln("scoped:");
>> {
>> auto s = S(true);
>> }
>>
>> writeln("with:");
>> with(S(true)) {
>> }
>> }
>>
>> Output:
>>
>> scoped:
>> this
>> ~this
>> with:
>> this
>
> Report it on bugzilla. Walter has been fixing issues with destructors for
> temporaries lately. They've been buggy for a while. A fair bit of the problem
> was fixed in dmd 2.053 but not all of it. If you're not using 2.053, then
> that's probably why the code is broken. If you are using 2.053, then Walter
> needs to be aware that that particular use case hasn't been fixed yet.
>
> - Jonathan M Davis

http://d.puremagic.com/issues/show_bug.cgi?id=6128