On 3/24/17 12:24 AM, Yuxuan Shui wrote:
So I was trying to make my template take a value parameter, whose type
is also a parameter to the template. e.g.:

    template A(Char[] str, Char);

But dmd complains about 'Char' being undefined. I have to write:

    template A(Char, Char[] str);

Which is inconvenient, because now 'Char' can't be deduced by the compiler.

Can we make the first case work?

How about this?

template A(alias str)
if(is(typeof(str) : Char[], Char)){
        alias Char = typeof(str[0]);
//      ...
}

In general it's sometimes possible to do the deduction w/o introducing more template arguments.

---
Dmitry Olshansky

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