Bug 12111 – Cannot pull a function template into an overload set

Works with regular functions, but not function templates: ------------------------------ module a; import b; alias foo = b.foo; void foo(T)(T t) if(is(T==char)) {} void main() { foo(1); } ------------------------------ module b; void foo(T)(T t) if(is(T==int)) {} ------------------------------ Error: template a.foo(T)(T t) if (is(T == char)) conflicts with alias a.foo at a.d(4) FWIW, The problem does not appear to be related to the "if(...)" constraints, because using these foo's has the same problem: void foo(T)(int[T] t) {} void foo(T)(T[] t) {}

Workaround: ------------------------------ module a; import b; alias foo = b.foo; void foo(T)(T t) if(is(T==char)) {} void foo(T)(T t) if(is(T==int)) { b.foo(t); } // Workaround for #12111 void main() { foo(1); } ------------------------------ module b; void foo(T)(T t) if(is(T==int)) {} ------------------------------

Better workaround, just change: alias foo = b.foo; to alias foo() = b.foo; I'm no longer certain whether or not this is actually a bug.

Works for me with 2.078.3.