Can a call to pragma(msg, __FILE__, ...) be mixin templatized?

[Simen Kjærås]

On Monday, 17 August 2020 at 21:18:41 UTC, Per Nordlöw wrote:
> I'm using
>
>     pragma(msg, __FILE__, "(", __LINE__, ",1): Debug: ", "A 
> useful debug message");
>
> to print compile-time information formatted as standard 
> compiler diagnostics.
>
> These are picked up by Emacs Flycheck and overlayed in the 
> editor and listen in the *Flycheck errors* buffer. Very 
> convenient. When I want to get the type of something at 
> compile-time.
>
> In order to not having to repeat oneself I'm now looking for a 
> way to extract this into a `mixin template`. Is this possible 
> somehow and still preserve the instantiation site values of 
> `__FILE__` and `__LINE__`?

mixin template ctLog(string msg, string file = __FILE__, size_t 
line = __LINE__) {
     pragma(msg, file, "(", line, "): ", msg);
}

mixin ctLog!"Module scope";
unittest {
     mixin ctLog!"function scope";
}
struct S {
     mixin ctLog!"Struct scope";
}

This works for me.

--
   Simen