On Tue, 05 Jul 2011 02:44:03 +0200, Loopback wrote:
> I've researched a bit though I still haven't come up with a solution.
> Since the problem lies within (the most simple) constructor, I tried to
> modify it for another outcome. If I supplied a generic parameter to the
> pre-constructor the "Cannot evaluate at compile time" message
> disappeared but two new errors appeared instead.
>
> This is what I modified:
>
> this()(float x, float y, float z) => this(T)(float x, float y, float z)
>
> If I use this code instead, I get two other errors appearing:
>
> Error: template test.DVECTOR2.__ctor(T) does not match any function
> template declaration
>
> This error and another one (individual to each statement) appears in the
> following code statements:
>
>
> Error: template test.DVECTOR2.__ctor(T) cannot deduce template function
> from argument types !()(float,float)
> DVECTOR2 m_zoom = DVECTOR2(2f, 2f);
>
> Error: template test.DVECTOR2.__ctor(T) cannot deduce template function
> from argument types !()(immutable(float),const(float)) immutable
> DVECTOR2 m_UP_DIR = DVECTOR2(0f, 1f, 0f);
Here is a simple form of the same problem:
struct S
{
this(T)(double d)
{}
}
void main()
{
auto o = S(1.5);
}
Error: template deneme.S.__ctor(T) does not match any function template
declaration
Error: template deneme.S.__ctor(T) cannot deduce template function from
argument types !()(double)
The compiler is right: What should T be there? int? string? MyClass?
I've realized again that I don't know how to specify the template
parameter for the constructor. The following attempt fails as the
compiler thinks S itself is a template:
auto o = S!string(1.5);
Error: template instance S is not a template declaration, it is a struct
And if I try to be smart after the error message, this seg faults the
compiler:
auto o = S.__ctor!string(1.5);
Ali
