[Issue 10909] std.conv.to!(bool)(int): conversion from integer to bool

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10909



--- Comment #2 from growlercab at gmail.com 2013-08-26 23:31:00 PDT ---
(In reply to comment #1)
> The current semantics of "to!X" means that there is range validation. This
> means that something such as:
> 
> "to!bool(55)" *should* trigger an overflow exception.
> 
> This might sound inconvenient at first, but on the other hand, if it didn't,
> than to would just be a glorified cast to bool.

Good point, range checking should be in place so ignore that last part of the
code. If this is implemented then the following should work:

---
import std.conv;

void main() {
    assert(0.to!bool == false);
    assert(1.to!bool == true);


    int ival = 1;
    assert(ival.to!bool == true);

    ival = 0;
    assert(ival.to!bool == false); 
}
---

Thanks,
G.

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