Weird integral promotion issue (?)

Dmitry Olshansky dmitry.olsh at gmail.com
Sat May 12 14:21:31 PDT 2012


On 13.05.2012 1:08, Alex Rønne Petersen wrote:
> Hi,
>
> alexrp at alexrp ~/Projects/tests $ dmd test.d
> test.d(9): Error: cannot implicitly convert expression (240) of type int
> to byte
> alexrp at alexrp ~/Projects/tests $ cat test.d
> import std.stdio, std.traits;
>
> void foo(T)(T val) if (isIntegral!T)
> {
> }
>
> void main()
> {
> foo!byte(0b11110000);
> }
>
> Why? I explicitly told the compiler that T == byte. Passing 0b00001111
> works perfectly fine.
>

byte is in range of -128..127

use ubyte

Gotcha!

-- 
Dmitry Olshansky


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