Bug 4253 – opCall() not called in initialized struct

This is a small C++ program that compiles: template<typename T> struct Foo { Foo(T x) {} template<typename U> void operator()(U y) {} }; int main() { Foo<int> foo(1); foo(1.5); } I think this is an equivalent D2 program: struct Foo(T) { this(T x) {} void opCall(U)(U y) {} } void main() { auto foo = Foo!int(1); foo(1.5); // line 7 } But DMD V. 2.046 prints: temp.d(7): Error: constructor temp.Foo!(int).Foo.this (int x) is not callable using argument types (double) temp.d(7): Error: cannot implicitly convert expression (1.5) of type double to int

A simpler test case: struct Foo { this(int x) {} void opCall(double y) {} } void main() { Foo foo = Foo(1); foo(1.5); }

See also bug 4053

*** This issue has been marked as a duplicate of issue 6036 ***