source: tests/errors/scope-type.cfa @ 2d6add4

// The type-level analog of errors/scope.
// Keep harmonized with errors/scope.

#ifdef OMIT_DRIVING_REJECTIONS
// For manual sanity checking:
// Leave out the offensive declarations and verify that what's left is accepted.
#define EXPREJ(...)
#else 
#define EXPREJ(...) __VA_ARGS__
#endif

        struct thisIsAnError {};
EXPREJ( struct thisIsAnError {}; )

        struct thisIsNotAnError {};

        // There's no type-level analog to overloading at one level:
        //x    float thisIsNotAnError;

        int thisIsAlsoNotAnError() {
          struct thisIsNotAnError { int xxx; };
        }

        // There's no type-level analog to overloading at one level, again:
        //x    int thisIsAlsoNotAnError( double x ) {
        //x    }

        struct thisIsStillNotAnError;
        struct thisIsStillNotAnError;

        // Has analog at type level but would be a repeat (no analog of function vs variable):
        //x
        //x    double butThisIsAnError( double ) {
        //x    }
        //x
        //x    double butThisIsAnError( double ) {
        //x    }



        //
        // Repeat the validly harmonized cases, across various type forms
        //

        // union

        union thisIsAnError_u {};
EXPREJ( union thisIsAnError_u {}; )

        union thisIsNotAnError_u {};

        int thisIsAlsoNotAnError_u() {
          union thisIsNotAnError_u { int xxx; };
        }

        union thisIsStillNotAnError_u;
        union thisIsStillNotAnError_u;

        // enum

        enum thisIsAnError_e { E0 };
EXPREJ( enum thisIsAnError_e { E0 }; )

        enum thisIsNotAnError_e { E1 };

        int thisIsAlsoNotAnError_e() {
          enum thisIsNotAnError_e { E1_xxx };
        }

        enum thisIsStillNotAnError_e;
        enum thisIsStillNotAnError_e;

        // polymorphic

        forall(T&)  struct thisIsAnError_p {};
EXPREJ( forall(Tx&) struct thisIsAnError_p {}; )

        forall(T&)  struct thisIsNotAnError_p {};

        int thisIsAlsoNotAnError_p() {
          forall(Tx&) struct thisIsNotAnError_p { int xxx; };
        }

        forall(Tx&) 
        int thisIsAlsoNotAnError_p2() {
          struct thisIsNotAnError_p { Tx * xxx; };
        }

        forall(T&)  struct thisIsStillNotAnError_p;
      #ifdef SHOW_TRAC_284
        forall(Tx&) struct thisIsStillNotAnError_p;  // should be accepted, but blocked
      #endif