func AsInt()

in starlark/int.go [365:414]

• 48 lines of code
• 21 McCabe index (conditional complexity)

func AsInt(x Value, ptr interface{}) error {
	xint, ok := x.(Int)
	if !ok {
		return fmt.Errorf("got %s, want int", x.Type())
	}

	bits := reflect.TypeOf(ptr).Elem().Size() * 8
	switch ptr.(type) {
	case *int, *int8, *int16, *int32, *int64:
		i, ok := xint.Int64()
		if !ok || bits < 64 && !(-1<<(bits-1) <= i && i < 1<<(bits-1)) {
			return fmt.Errorf("%s out of range (want value in signed %d-bit range)", xint, bits)
		}
		switch ptr := ptr.(type) {
		case *int:
			*ptr = int(i)
		case *int8:
			*ptr = int8(i)
		case *int16:
			*ptr = int16(i)
		case *int32:
			*ptr = int32(i)
		case *int64:
			*ptr = int64(i)
		}

	case *uint, *uint8, *uint16, *uint32, *uint64, *uintptr:
		i, ok := xint.Uint64()
		if !ok || bits < 64 && i >= 1<<bits {
			return fmt.Errorf("%s out of range (want value in unsigned %d-bit range)", xint, bits)
		}
		switch ptr := ptr.(type) {
		case *uint:
			*ptr = uint(i)
		case *uint8:
			*ptr = uint8(i)
		case *uint16:
			*ptr = uint16(i)
		case *uint32:
			*ptr = uint32(i)
		case *uint64:
			*ptr = uint64(i)
		case *uintptr:
			*ptr = uintptr(i)
		}
	default:
		panic(fmt.Sprintf("invalid argument type: %T", ptr))
	}
	return nil
}