type Complex interface {
	~complex64 | ~complex128
}

// OrderedAbs is a helper type that defines an Abs method for
// ordered numeric types.
type OrderedAbs[T OrderedNumeric] T

func (a OrderedAbs[T]) Abs() OrderedAbs[T] {
	if a < 0 {
		return -a
	}
	return a
}

// ComplexAbs is a helper type that defines an Abs method for
// complex types.

	~complex64 | ~complex128
}

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// // orderedAbs is a helper type that defines an Abs method for
// // ordered numeric types.
// type orderedAbs[T orderedNumeric] T
//
// func (a orderedAbs[T]) Abs() orderedAbs[T] {
// 	if a < 0 {
// 		return -a
// 	}
// 	return a
// }
//
// // complexAbs is a helper type that defines an Abs method for

	~complex64 | ~complex128
}

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// // OrderedAbs is a helper type that defines an Abs method for
// // ordered numeric types.
// type OrderedAbs[T OrderedNumeric] T
// 
// func (a OrderedAbs[T]) Abs() OrderedAbs[T] {
// 	if a < 0 {
// 		return -a
// 	}
// 	return a
// }
// 

type Complex interface {
	~complex64 | ~complex128
}

// orderedAbs is a helper type that defines an Abs method for
// a struct containing an ordered numeric type.
type orderedAbs[T orderedNumeric] struct {
	Value_ T
}

func (a orderedAbs[T]) Abs() T {
	if a.Value_ < 0 {
		return -a.Value_
	}
	return a.Value_
}

type Complex interface {
	~complex64 | ~complex128
}

// orderedAbs is a helper type that defines an Abs method for
// a struct containing an ordered numeric type.
type orderedAbs[T orderedNumeric] struct {
	Value_ T
}

func (a orderedAbs[T]) Abs() T {
	if a.Value_ < 0 {
		return -a.Value_
	}
	return a.Value_
}

type Complex interface {
	~complex64|~complex128
}

// OrderedAbs is a helper type that defines an Abs method for
// ordered numeric types.
type OrderedAbs[T OrderedNumeric] T

func (a OrderedAbs[T]) Abs() OrderedAbs[T] {
	if a < 0 {
		return -a
	}
	return a
}

// ComplexAbs is a helper type that defines an Abs method for
// complex types.

	~complex64 | ~complex128
}

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// // orderedAbs is a helper type that defines an Abs method for
// // ordered numeric types.
// type orderedAbs[T orderedNumeric] T
//
// func (a orderedAbs[T]) Abs() orderedAbs[T] {
// 	if a < 0 {
// 		return -a
// 	}
// 	return a
// }
//
// // complexAbs is a helper type that defines an Abs method for

func AbsDifference[T NumericAbs[T]](x T) { panic(0) }

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// type OrderedAbs[T any] T
// 
// func (a OrderedAbs[T]) Abs() OrderedAbs[T]
// 
// func OrderedAbsDifference[T any](x T) {
// 	AbsDifference(OrderedAbs[T](x))
// }

// same code, reduced to essence

func g[P interface{ m() P }](x P) { panic(0) }

}

func TestGenericNames(t *testing.T) {
	s1 := Sym{Name: "main.set[int]"}
	s2 := Sym{Name: "main.(*value[int]).get"}
	s3 := Sym{Name: "a/b.absDifference[c/d.orderedAbs[float64]]"}
	s4 := Sym{Name: "main.testfunction[.shape.int]"}
	assertString(t, fmt.Sprintf("package of %q", s1.Name), s1.PackageName(), "main")
	assertString(t, fmt.Sprintf("package of %q", s2.Name), s2.PackageName(), "main")

	}

	// Simple use: Sort by user.
	OrderedBy(user).Sort(changes)
	fmt.Println("By user:", changes)

	// More examples.
	OrderedBy(user, increasingLines).Sort(changes)
	fmt.Println("By user,<lines:", changes)

	OrderedBy(user, decreasingLines).Sort(changes)
	fmt.Println("By user,>lines:", changes)

	OrderedBy(language, increasingLines).Sort(changes)