No shortcircuit for static if or template constraints?
qsdfghjk via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Sat Oct 24 17:01:53 PDT 2015
On Saturday, 24 October 2015 at 23:59:02 UTC, qsdfghjk wrote:
> On Saturday, 24 October 2015 at 23:34:19 UTC, stewart wrote:
>> On Saturday, 24 October 2015 at 23:26:09 UTC, stewart wrote:
>>> [...]
>>
>>
>> Oh and the workaround I'm using is this:
>>
>> ---
>> void func(T)(T vals) {
>> static if(isInputRange!T) {
>> static if(isIntegral!(ForeachType!T)) {
>> // Do something with range
>> }
>> } else {
>> // do something with scalar
>> }
>> }
>> ---
>>
>> which is a bit ugly.
>
> Maybe this could work:
>
> ---
> enum isSupportedRange(T) = isInputRange!T && is(ForeachType!T)
> && (isIntegral!(ElementType!T));
> ---
>
> ElementType() should return exactly what you excpeted with
> ForeachType().
Oh no! there's been a copy & paste error. I actually meant:
---
enum isSupportedRange(T) = isInputRange!T &&
(isIntegral!(ElementType!T));
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