Template mixin enum stringof
Lemonfiend via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Wed Dec 10 05:59:27 PST 2014
On Wednesday, 10 December 2014 at 12:57:07 UTC, Daniel Kozák via
Digitalmars-d-learn wrote:
> V Wed, 10 Dec 2014 12:35:44 +0000
> Lemonfiend via Digitalmars-d-learn
> <digitalmars-d-learn at puremagic.com>
> napsáno:
>
>> On Wednesday, 10 December 2014 at 12:08:34 UTC, ketmar via
>> Digitalmars-d-learn wrote:
>> > On Wed, 10 Dec 2014 11:52:11 +0000
>> > Lemonfiend via Digitalmars-d-learn
>> > <digitalmars-d-learn at puremagic.com>
>> > wrote:
>> >
>> >> Consider the following:
>> >>
>> >> ---
>> >> enum Foo { BAR, }
>> >>
>> >> mixin template S(string s_)
>> >> {
>> >> enum s = s_;
>> >> }
>> >>
>> >> void main()
>> >> {
>> >> mixin S!(Foo.BAR.stringof); // Error: identifier
>> >> 'stringof' of 'Foo.BAR.stringof' is not defined
>> >>
>> >> enum e = Foo.BAR.stringof;
>> >> mixin S!(e); // works fine
>> >> }
>> >> ---
>> >>
>> >> Why doesn't the first work? And is there an alternative to
>> >> the second version?
>> >
>> > mixin S!((Foo.BAR).stringof);
>> >
>> > sorry, don't remember the parsing rule for this.
>>
>> Wow, I didn't even consider that.. Thanks!
>
> Note: Using .stringof for code generation is not recommended,
> as the
> internal representation of a type or expression can change
> between
> different compiler versions.
>
> http://dlang.org/property#stringof
Ah, thanks for the warning!
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