Convert call to a string

[H. S. Teoh via Digitalmars-d-learn]

On Wed, Feb 15, 2017 at 02:18:48PM -0800, H. S. Teoh via Digitalmars-d-learn wrote:
[...]
> Try this:
> 
> 	auto debugPrint(string expr)() {
> 		writeln(expr);
> 		return mixin(expr);
> 	}
> 
> 	string myCall = debugPrint!`someFunction(1, "hello")`;
[...]

OTOH, that won't work with local variables (it'd only print the variable
names, not the values). Presumably you'd also want to print the
variables too.  So perhaps something like this instead:

	auto debugPrint(alias fun, A...)(A args) {
		writefln("%s(%(%s, %))", __traits(identifier, fun), [args]);
		return fun(args);
	}

	string arg = "hello";
	string myCall = debugPrint!someFunction(1, arg);


T

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