Bug 12117 – Non-template overload taken when template matches better

import std.stdio; struct S { int x; alias x this; } void f(T)(T t) { writeln(T.stringof); } void f(int t) { writeln(int.stringof); } void main() { f(S.init); // f(int) called } This writes "int", but should write "S". The template should be preferred because it matches without implicit conversions while the non-template requires a conversion. TDPL states that the non-template should be preferred only when it matches equally well (or better) than the template.

It likely has to do with the order of operations: 1) Try direct match of: type, then alias this, on regular function 2) Try direct match of: type, then alias this, on templated function (I'm just speculating it works /something/ like this) And the 'alias this' wins before a templated function is tried. I guess it's a question of priority. We'll see what Kenji and others have to say.

*** This issue has been marked as a duplicate of issue 5363 ***