Retrieving call expression of a function

[Quentin Ladeveze via Digitalmars-d-learn]

On Saturday, 28 November 2015 at 15:22:51 UTC, tcak wrote:
> On Saturday, 28 November 2015 at 15:02:32 UTC, Quentin Ladeveze 
> wrote:
>> Hi,
>>
>> Is it possible to retrieve the calling expression of a 
>> function ? Something like that
>>
>> ---
>> import std.stdio;
>>
>> void funcTest(int x, float y)
>> {
>>   writefln(get_call());
>> }
>>
>> void main()
>> {
>>   float x = 0.2;
>>   funcTest(1+2, x+2);
>> }
>> ---
>>
>> output expected : " funcTest(1+2, x+2) "
>>
>> Thanks
>
> I do not have right now to provide you with code, but three 
> things:
>
> 1. Use of mixin,
> 2. The function call to be written in a string,
> 3. A wrapper that stores given function call string, saves it, 
> and mixin it.

Thanks, it was a cool idea, I made something that works, but you 
can only call the function with literals, not with variables :

---

import std.stdio;

void main()
{
	int x = 2;

	enum call = "funcTest(1, 0.2);";
  	callPrinter!call;
}

template callPrinter(string call)
{
	void callPrinter()
	{
		writeln(call);
		mixin(call);
	}
}

void funcTest(int x, float y)
{
	writeln("called with ", x, " and ", y);
}

---

output :
funcTest(2, 0.2);
called with 2 and 0.2