Pop quiz, what does this do?

Stefan Koch uplink.coder at googlemail.com
Wed Mar 3 16:31:53 UTC 2021


On Wednesday, 3 March 2021 at 16:06:48 UTC, Steven Schveighoffer 
wrote:
> The FieldNameTuple from std.traits returns a tuple of names of 
> all the fields that are present on a type instance.
>
> What about the result on things that can't have fields?
>
> import std.traits;
>
> interface I
> {
>    int foo();
> }
>
> pragma(msg, FieldNameTuple!I);
>
> Without looking up the docs, or trying it, what do you think it 
> does?
>
> -Steve

My feeling is that it returns tuple("foo").
But based on the name that probably shouldn't happen.


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