Re: Picking function templates with __traits(getOverloads, ..., true)

[Jean-Louis Leroy via Digitalmars-d-learn]

On Thursday, 30 July 2020 at 00:27:49 UTC, user1234 wrote:
On Wednesday, 29 July 2020 at 23:57:21 UTC, Jean-Louis Leroy 
wrote:

This works:

[...]
I may be missing the obvious...or it's a compiler bug???


Yes and it's just been fixed, see 
https://github.com/dlang/dmd/pull/11431.

So uncommenting the second times works on ~master.


Ah thanks! In the meantime I realized that picking the 
overload at index 1 works. That's the difference between 'foo' 
and 'times'. Then I was 80% sure it was a bug.

Re: Picking function templates with __traits(getOverloads, ..., true)

[user1234 via Digitalmars-d-learn]

On Wednesday, 29 July 2020 at 23:57:21 UTC, Jean-Louis Leroy 
wrote:

This works:

[...]
I may be missing the obvious...or it's a compiler bug???


Yes and it's just been fixed, see 
https://github.com/dlang/dmd/pull/11431.

So uncommenting the second times works on ~master.

Picking function templates with __traits(getOverloads, ..., true)

[Jean-Louis Leroy via Digitalmars-d-learn]

This works:

module test;

void foo(T)(T a, T b) {}
void foo(T)(char a, T b) {}

template InstantiateTemplateAt(alias Module, string name, int 
index, T...) {
alias Template = __traits(getOverloads, test, name, 
true)[index];

alias InstantiateTemplateAt = Template!(T);
}

pragma(msg, typeof(InstantiateTemplateAt!(test, "foo", 1, int)));
// pure nothrow @nogc @safe void(char a, int b)

class Matrix(T) {}

Matrix!T times(T)(Matrix!T a, T b);
// Matrix!T times(T)(T a, Matrix!T b); // <-- second 'times' 
overload


pragma(msg, typeof(InstantiateTemplateAt!(test, "times", 0, 
int)));

// Matrix!int(Matrix!int a, int b)

But if I uncomment the second 'times' function template, I get an 
error:


templateoverloads.d(8): Error: template `test.times` matches more 
than one template declaration:

templateoverloads.d(16): `times(T)(Matrix!T a, T b)`
and
templateoverloads.d(17): `times(T)(T a, Matrix!T b)`
templateoverloads.d(19): Error: template instance 
`test.InstantiateTemplateAt!(test, "times", 0, int)` error 
instantiating

_error_

I may be missing the obvious...or it's a compiler bug???
(not sure if this belongs to the Learn section either)