Re: Template Parameters in Struct Member Functions

[Mike Parker via Digitalmars-d-learn]

On Saturday, 22 August 2015 at 16:49:26 UTC, DarthCthulhu wrote:

I'm having difficulty understanding how templates operate as function parameters.

Say I have this:

struct ArrayTest {

        void arrayTest(T) (T arrayT) {

                writeln(arrayT);
        }
}

unittest {

ArrayTest test;

        float farray[] = [
                0.5f,  0.5f, 0.0f,
                0.5f, -0.5f, 0.0f,
                -0.5f, -0.5f, 0.0f,
                -0.5f,  0.5f, 0.0f
        ];

        test.arrayTest(farray);

}

Everything works peachy as expected. But as soon as I add another parameter to the arrayTest function like so (and changing the unit test to match):

void arrayTest(T, int passing) (T arrayT) { ... }

I get 'cannot deduce function from argument types' errors.

Specifically stating the type of the function doesn't seem to help:

test.arrayTest(float [])(farray, 1);

test.arrayTest!(float, 1)(farray);