• Jack (20/20) Feb 26 2021 int a = 10;
• Adam D. Ruppe (8/11) Feb 26 2021 rename g to f. If the function inside the template's name matches
• Jack (4/15) Feb 26 2021 thanks! i was confused about where put alias in the function

Jack <jckj33 gmail.com> writes:

int a = 10;
f(a); // print "a"
int b = 10;
f(b); // print "b"

I managed to do this with alias parameter in a template:

template f(alias s, string file = __FILE__, size_t line = 
__LINE__)
{
     import std.exception : enforce;
     import std.string : format;

     void g()
     {
       writeln(__traits(identifier, s));
     }
}

so I can call like this:

f!(a).g; // print "a"

Are there other way to do this? Also, can I short this template 
function somehow to syntax f!(a) omitting the g? I couldn't find 
a way to set the template's body like it's a function

Adam D. Ruppe <destructionator gmail.com> writes:

On Friday, 26 February 2021 at 19:32:52 UTC, Jack wrote:
 I managed to do this with alias parameter in a template:

this is the only way, it needs to be an alias template

 Also, can I short this template function somehow to syntax 
 f!(a) omitting the g?

rename g to f. If the function inside the template's name matches 
the template's own name, the compiler combines them.

of course at that point you can also just write it

void f(alias var)() {
     // do your magic
}

Jack <jckj33 gmail.com> writes:

On Friday, 26 February 2021 at 19:37:34 UTC, Adam D. Ruppe wrote:
 On Friday, 26 February 2021 at 19:32:52 UTC, Jack wrote:
 I managed to do this with alias parameter in a template:

 this is the only way, it needs to be an alias template

 Also, can I short this template function somehow to syntax 
 f!(a) omitting the g?

 rename g to f. If the function inside the template's name 
 matches the template's own name, the compiler combines them.

 of course at that point you can also just write it

 void f(alias var)() {
     // do your magic
 }

thanks! i was confused about where put alias in the function 
parameters but of course it's in the first () meant to be used as 
template parameters