string-mixin-runtime-error.d

import std.stdio;

T eval( string op , T )( T a , T b ) {
	return mixin( q{a} ~ op ~ q{b} );
}

unittest {
	writeln( eval!q{/}( 123 , 0 ) );
}

//object.Error@(0): Integer Divide by Zero
//----------------
//0x0040BA03 in pure nothrow @nogc @safe int xxx.eval!("/", int).eval(int, int) at /xxx/xxx.d(4)
//0x004031CC in void xxx.__unittestL7_8() at /xxx/xxx.d(8)

template-mixin-runtime-error.d

import std.stdio;

mixin template makeX() {
	auto x = ( int a ){
		return 1 / a;
	};
}

unittest {
	mixin makeX;
	writeln( x(0) );
}

// object.Error@(0): Integer Divide by Zero
// ----------------
// 0x004031E5 in pure nothrow @nogc @safe int xxx.__unittestL9_8().__mixin1.__lambda2(int) at /xxx/xxx.d(5)
// 0x004031D1 in void xxx.__unittestL9_8() at /xxx/xxx.d(11)