// arbitrarily large.
func (check *Checker) overflow(x *operand, opPos syntax.Pos) {
	assert(x.mode == constant_)

	if x.val.Kind() == constant.Unknown {
		// TODO(gri) We should report exactly what went wrong. At the
		//           moment we don't have the (go/constant) API for that.
		//           See also TODO in go/constant/value.go.
		check.error(atPos(opPos), InvalidConstVal, "constant result is not representable")
		return
	}

// arbitrarily large.
func (check *Checker) overflow(x *operand, opPos token.Pos) {
	assert(x.mode == constant_)

	if x.val.Kind() == constant.Unknown {
		// TODO(gri) We should report exactly what went wrong. At the
		//           moment we don't have the (go/constant) API for that.
		//           See also TODO in go/constant/value.go.
		check.error(atPos(opPos), InvalidConstVal, "constant result is not representable")
		return
	}