func (s *state) referenceTypeBuiltin(n *ir.UnaryExpr, x *ssa.Value) *ssa.Value {
	if !n.X.Type().IsMap() && !n.X.Type().IsChan() {
		s.Fatalf("node must be a map or a channel")
	}
	if n.X.Type().IsChan() && n.Op() == ir.OLEN {
		s.Fatalf("cannot inline len(chan)") // must use runtime.chanlen now
	}
	if n.X.Type().IsChan() && n.Op() == ir.OCAP {
		s.Fatalf("cannot inline cap(chan)") // must use runtime.chancap now
	}

func Less[T Ordered](x, y T) bool {
	return (isNaN(x) && !isNaN(y)) || x < y
}

// Compare returns
//
//	-1 if x is less than y,
//	 0 if x equals y,
//	+1 if x is greater than y.
//
// For floating-point types, a NaN is considered less than any non-NaN,
// a NaN is considered equal to a NaN, and -0.0 is equal to 0.0.
func Compare[T Ordered](x, y T) int {
	xNaN := isNaN(x)
	yNaN := isNaN(y)
	if xNaN {
		if yNaN {
			return 0

}

type hostPathTypeChecker interface {
	Exists() bool
	IsFile() bool
	MakeFile() error
	IsDir() bool
	MakeDir() error
	IsBlock() bool
	IsChar() bool
	IsSocket() bool
	GetPath() string
}

type fileTypeChecker struct {
	path string
	hu   hostutil.HostUtils
}

func (ftc *fileTypeChecker) Exists() bool {

    public val KaType.isDouble: Boolean get() = withValidityAssertion { isClassTypeWithClassId(DefaultTypeClassIds.DOUBLE) }
    public val KaType.isChar: Boolean get() = withValidityAssertion { isClassTypeWithClassId(DefaultTypeClassIds.CHAR) }
    public val KaType.isBoolean: Boolean get() = withValidityAssertion { isClassTypeWithClassId(DefaultTypeClassIds.BOOLEAN) }

	for i := 0; i < len(fs); i++ {
		testfs := Clone(fs)
		testfs[i] = math.NaN()

		fmin := Min(testfs)
		if !math.IsNaN(fmin) {
			t.Errorf("got min %v, want NaN", fmin)
		}

		fmax := Max(testfs)
		if !math.IsNaN(fmax) {
			t.Errorf("got max %v, want NaN", fmax)
		}
	}
}

func TestMinMaxPanics(t *testing.T) {
	intCmp := func(a, b int) int { return a - b }

			case auxFloat32:
				canHaveAuxInt = true
				if math.IsNaN(v.AuxFloat()) {
					f.Fatalf("value %v has an AuxInt that encodes a NaN", v)
				}
				if !isExactFloat32(v.AuxFloat()) {
					f.Fatalf("value %v has an AuxInt value that is not an exact float32", v)
				}
			case auxFloat64:
				canHaveAuxInt = true
				if math.IsNaN(v.AuxFloat()) {
					f.Fatalf("value %v has an AuxInt that encodes a NaN", v)

            type == null -> KaConstantValueFactory.createConstantValue(value, psi as? KtElement)
            type.isBoolean -> KaConstantValue.KaBooleanConstantValue(value as Boolean, expression)
            type.isChar -> KaConstantValue.KaCharConstantValue((value as? Char) ?: (value as Number).toInt().toChar(), expression)
            type.isByte -> KaConstantValue.KaByteConstantValue((value as Number).toByte(), expression)

	}
	if dummys.Get("someFloat").Equal(dummys.Get("someInt")) {
		t.Errorf("different values are not unequal")
	}
}

func TestNaN(t *testing.T) {
	if !dummys.Get("NaN").IsNaN() {
		t.Errorf("JS NaN is not NaN")
	}
	if !js.ValueOf(math.NaN()).IsNaN() {
		t.Errorf("Go NaN is not NaN")
	}
	if dummys.Get("NaN").Equal(dummys.Get("NaN")) {
		t.Errorf("NaN is equal to NaN")
	}
}

func TestUndefined(t *testing.T) {

func Null() Value {
	return valueNull
}

// IsNull reports whether v is the JavaScript value "null".
func (v Value) IsNull() bool {
	return v.ref == valueNull.ref
}

// IsNaN reports whether v is the JavaScript value "NaN".
func (v Value) IsNaN() bool {
	return v.ref == valueNaN.ref
}

// Global returns the JavaScript global object, usually "window" or "global".
func Global() Value {
	return valueGlobal
}

func equal[T comparable](v1, v2 T) bool {
	return v1 == v2
}

// equalNaN is like == except that all NaNs are equal.
func equalNaN[T comparable](v1, v2 T) bool {
	isNaN := func(f T) bool { return f != f }
	return v1 == v2 || (isNaN(v1) && isNaN(v2))
}

// offByOne returns true if integers v1 and v2 differ by 1.
func offByOne(v1, v2 int) bool {
	return v1 == v2+1 || v1 == v2-1
}

func TestEqualFunc(t *testing.T) {