Question about __treats

rikki cattermole via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Wed Sep 21 00:46:11 PDT 2016


On 21/09/2016 7:38 PM, Suliman wrote:
> On Wednesday, 21 September 2016 at 07:09:01 UTC, rikki cattermole wrote:
>> On 21/09/2016 7:06 PM, Suliman wrote:
>>> It's seems that __treats is language keyword that help to get info from
>>> compile-time. But there is also lib named std.traits
>>>
>>> and I can't understand difference
>>>
>>> https://dlang.org/spec/traits.html
>>> https://dlang.org/phobos/std_traits.html
>>>
>>> Could you explain the difference?
>>
>> Simple, __traits or __treats as you called it is implemented by the
>> compiler.
>> But std.traits is all implemented in the standard library as user D code.
>>
>> If you can do it with std.traits you should. Otherwise __traits.
>> So std.traits is a bit higher level and there are more things
>> available there as adding more __traits is a bit rare.
>
> So for example to get All Members of class I should use allMembers from
> __traits, because it's seems that std.traits do not have such future.

Yeah exactly.


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