Capturing caller's file/line number in variadic template functions

[H. S. Teoh]

I'm writing some unittests with very repetitive tests for a myriad of
different types, so I wrote a helper function:

	version(unittest) {
		void checkConsistency(T...)(T args) {
			foreach (a; args) {
				assert(isConsistent(a));
			}
		}
	}
	unittest {
		A a;
		B b;
		C c;
		checkConsistency(a,b,c);
	}

However, when a consistency check fails, the assert error points to
checkConsistency instead of the unittest, so it's a pain trying to
figure out exactly which test case failed. I tried adding default
arguments to checkConsistency:

	void checkConsistency(T...)(T args, string file=__FILE__,
		size_t line=__LINE__) { ... }

but this causes compile errors because when C==string, then the call is
ambiguous.

Is there an easy of working around this?


T

-- 
To err is human; to forgive is not our policy. -- Samuel Adler