if isComplex(Vu) && isComplex(Tu) {
		return true
	}

	// "V is an integer or a slice of bytes or runes and T is a string type"
	if (isInteger(Vu) || isBytesOrRunes(Vu)) && isString(Tu) {
		return true
	}

	// "V is a string and T is a slice of bytes or runes"
	if isString(Vu) && isBytesOrRunes(Tu) {
		return true
	}

	// package unsafe:

	if isComplex(Vu) && isComplex(Tu) {
		return true
	}

	// "V is an integer or a slice of bytes or runes and T is a string type"
	if (isInteger(Vu) || isBytesOrRunes(Vu)) && isString(Tu) {
		return true
	}

	// "V is a string and T is a slice of bytes or runes"
	if isString(Vu) && isBytesOrRunes(Tu) {
		return true
	}

	// package unsafe:

	Float32:       {Float32, IsFloat, "float32"},
	Float64:       {Float64, IsFloat, "float64"},
	Complex64:     {Complex64, IsComplex, "complex64"},
	Complex128:    {Complex128, IsComplex, "complex128"},
	String:        {String, IsString, "string"},
	UnsafePointer: {UnsafePointer, 0, "Pointer"},

	UntypedBool:    {UntypedBool, IsBoolean | IsUntyped, "untyped bool"},
	UntypedInt:     {UntypedInt, IsInteger | IsUntyped, "untyped int"},

	Float32:       {Float32, IsFloat, "float32"},
	Float64:       {Float64, IsFloat, "float64"},
	Complex64:     {Complex64, IsComplex, "complex64"},
	Complex128:    {Complex128, IsComplex, "complex128"},
	String:        {String, IsString, "string"},
	UnsafePointer: {UnsafePointer, 0, "Pointer"},

	UntypedBool:    {UntypedBool, IsBoolean | IsUntyped, "untyped bool"},
	UntypedInt:     {UntypedInt, IsInteger | IsUntyped, "untyped int"},

// a string, the result is of type (possibly untyped) string.
func coreString(t Type) Type {
	t = Unalias(t)
	tpar, _ := t.(*TypeParam)
	if tpar == nil {
		return under(t) // string or untyped string
	}

	var su Type
	hasString := false
	if tpar.underIs(func(u Type) bool {
		if u == nil {
			return false
		}
		if isString(u) {
			u = NewSlice(universeByte)

// a string, the result is of type (possibly untyped) string.
func coreString(t Type) Type {
	t = Unalias(t)
	tpar, _ := t.(*TypeParam)
	if tpar == nil {
		return under(t) // string or untyped string
	}

	var su Type
	hasString := false
	if tpar.underIs(func(u Type) bool {
		if u == nil {
			return false
		}
		if isString(u) {
			u = NewSlice(universeByte)

// necessary so that we can use alias type names that may not be reachable from
// inType itself).
func describe(typ, inType types.Type, inName string) string {
	name := inName
	if typ != inType {
		name = typeName(typ)
	}
	if name == "" {
		return ""
	}

	var parentheticals []string
	if underName := typeName(typ.Underlying()); underName != "" && underName != name {
		parentheticals = append(parentheticals, underName)
	}

        public int hashCode() {
            return delegate.hashCode();
        }

        @Override
        public String asString() {
            return delegate.toString();
        }

        @Override
        public String toString() {
            return asString();
        }
    }

    static class DefaultVersionRange implements VersionRange {
        private final VersionScheme versionScheme;

// Update the C environment if cgo is loaded.
func setenv_c(k string, v string) {
	if _cgo_setenv == nil {
		return
	}
	arg := [2]unsafe.Pointer{cstring(k), cstring(v)}
	asmcgocall(_cgo_setenv, unsafe.Pointer(&arg))
}

// Update the C environment if cgo is loaded.
func unsetenv_c(k string) {
	if _cgo_unsetenv == nil {
		return
	}
	arg := [1]unsafe.Pointer{cstring(k)}
	asmcgocall(_cgo_unsetenv, unsafe.Pointer(&arg))
}

        public int hashCode() {
            return delegate.hashCode();
        }

        @Override
        public String asString() {
            return delegate.toString();
        }

        @Override
        public String toString() {
            return asString();
        }
    }

    static class DefaultVersionRange implements VersionRange {
        private final VersionScheme versionScheme;