DMD 0.148 - scope guard

[Lionello Lunesu]

"Walter Bright" <newshound at digitalmars.com> wrote in message 
news:dtsr1i$1u4v$4 at digitaldaemon.com...
>
> "Hasan Aljudy" <hasan.aljudy at gmail.com> wrote in message 
> news:dtsfm5$1h2i$1 at digitaldaemon.com...
>> Why not just reuse "finally"?
>>
>> void func()
>> {
>>     init_some_reource();
>>     foo(); // foo throws an exception
>>     //func doesn't catch the exception
>>     //but it has a finally clause
>>
>>     finally  //aka on scope exit, whether success or fail
>>     {
>>         release_the_resource();
>>     }
>> }
>
> finally does work for on_scope_exit, but it leaves on_scope_success and 
> on_scope_failure hanging.

Similar to allowing multiple "finally" statements, even without "try", you 
could allow multiple "catch", also without "try":

finally writefln("done");
dofoo();
catch dofoo_undo();
dobar();

where the catch would also rethrow the exception being caught.

Now we just need something sensible for on_scope_success and we're done ; )

L.