New Issue: unexpected implicit conversion from opaque type to int

Notifications Issues
1

19728, "mppf", "unexpected implicit conversion from opaque type to int", "2022-04-29T18:40:25Z"

I'm seeing a surprising implicit conversion from an opaque extern type to int.
I would have expected a compilation error in this case.

Steps to Reproduce

Source Code:

// myint.h
typedef int myint;
static myint global_myint;

extern type myint;
extern const global_myint: myint;

// this should enable explicit conversion (cast)
// not implicit conversion
inline operator :(x:myint, type t:int) {
  return 1;
}

proc foo(): int {
  //return "bla";      // error: can't initialize return value
  return global_myint; // expect a similar error
                       // (compiler shouldn't assume opaque type
                       //  can be implicitly converted to int)
}

writeln(foo());

Associated Future Test(s):
test/extern/ferguson/opaque-type-implicit-conversion.chpl #19727