A bug with matching overloaded functions?

[Jonathan M Davis]

On Wednesday, December 01, 2010 08:42:23 flyinghearts wrote:
> void check(string s)  {}
> void check(wstring s) {}
> void check(dstring s) {}
> 
> void main()
> {
>   check("test");
>   //check("test"c);
> }
> 
> 
> D:\Desktop\d\zb.d(7): Error: function zb.check called with argument types:
> 	((string))
> matches both:
> 	zb.check(string s)
> and:
> 	zb.check(immutable(dchar)[] s)
> 
> 
> 
> 
> 
> The type of "test" is string, isn't it?

Not exactly. A string literal implictly casts to all 3 string types. You can add 
a suffix to force it to be a wstring or dstring (I don't think that there's a suffix 
for a normal string though), or you can cast it to the exact one you want, or 
you can assign it to a variable first. If you use auto, I believe that it will 
default to string rather than wstring or dstring, but string literals implicitly 
cast to all 3, so the compiler considers your code to be ambiguous.

- Jonathan M Davis