Why can't I assign a mixin to an alias?
Mihail-K via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Fri Jun 10 15:56:28 PDT 2016
On Friday, 10 June 2016 at 22:38:29 UTC, Dechcaudron wrote:
> I have the following code:
>
> private string getVariableSignalWrappersName(VarType)()
> {
> return VarType.stringof ~ "SignalWrappers";
> }
>
> void addVariableListener(VarType)(int variableIndex, void
> delegate(int, VarType))
> {
> alias typeSignalWrappers =
> mixin(getVariableSignalWrappersName!VarType);
> }
>
> On compilation, the following error is issued:
> Error: basic type expected, not mixin
>
> Why should it be like that? I believe the compiler should not
> impose restrictions on what mixins can or cannot do :/
I'm no expert, but this looks like a grammar issue more than
anything else. You can work around it by moving the alias
declaration into the mixin.
mixin("alias typeSignalWrappers = " ~
getVariableSignalWrappersName!VarType ~ ";");
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