typeof alias in templates

JAnderson ask at me.com
Mon Jul 21 07:58:29 PDT 2008


bearophile wrote:
> In a template I need both the name and type of a given variable, but I have found a problem that can be shown with this simple code:
> 
> template Bar(string name) {
>     pragma(msg, name);
> }
> template Foo(alias A) {
>     alias Bar!(A.stringof) Foo;
> }
> void main() {
>     int x = 10;
>     alias Foo!(x) Nothing;
> }
> 
> I'd like this code to print "x" instead of "int". Is this a bug of DMD V.1.033?
> 
> (At the moment I have solved the problem giving the template the name of the variable, and then finding its type with typeof(mixin("name")), but it's a less elegant solution).
> 
> Bye,
> bearophile

I imagine once x gets into the template all the compiler knows about it 
is its type.

-Joel


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