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)
			hasString = true
		}
		if su != nil {
			u = match(su, u)
			if u == nil {
				return false
			}
		}
		// su == nil || match(su, u) != nil
		su = u
		return true
	}) {

	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)
			hasString = true
		}
		if su != nil {
			u = match(su, u)
			if u == nil {
				return false
			}
		}
		// su == nil || match(su, u) != nil
		su = u
		return true
	}) {

func Set(val, out any) error {
	// Special case: map out type must be set through map ptr.
	if util.IsMap(val) && util.IsMapPtr(out) {
		reflect.ValueOf(out).Elem().Set(reflect.ValueOf(val))
		return nil
	}
	if util.IsSlice(val) && util.IsSlicePtr(out) {
		reflect.ValueOf(out).Elem().Set(reflect.ValueOf(val))
		return nil
	}

	if reflect.TypeOf(val) != reflect.TypeOf(out) {

}

// IsMapPtr reports whether v is a map ptr type.
func IsMapPtr(v any) bool {
	t := reflect.TypeOf(v)
	return t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Map
}

// IsSlice reports whether value is a slice type.
func IsSlice(value any) bool {
	return kindOf(value) == reflect.Slice
}

// IsStruct reports whether value is a struct type
func IsStruct(value any) bool {
	return kindOf(value) == reflect.Struct
}

		}
		if attribute.BoolValue != nil {
			entries.Insert("bool")
		}
		if attribute.IntValue != nil {
			entries.Insert("int")
		}
		if attribute.IntSliceValue != nil {
			entries.Insert("intSlice")
		}
		if attribute.StringValue != nil {
			entries.Insert("string")
		}
		if attribute.StringSliceValue != nil {
			entries.Insert("stringSlice")
		}
		if attribute.VersionValue != nil {

func embedKind(typ *types.Type) int {
	if typ.Sym() != nil && typ.Sym().Name == "FS" && typ.Sym().Pkg.Path == "embed" {
		return embedFiles
	}
	if typ.Kind() == types.TSTRING {
		return embedString
	}
	if typ.IsSlice() && typ.Elem().Kind() == types.TUINT8 {
		return embedBytes
	}
	return embedUnknown
}

func embedFileNameSplit(name string) (dir, elem string, isDir bool) {
	if name[len(name)-1] == '/' {
		isDir = true

func SearchStrings(a []string, x string) int {
	return Search(len(a), func(i int) bool { return a[i] >= x })
}

// Search returns the result of applying [SearchInts] to the receiver and x.
func (p IntSlice) Search(x int) int { return SearchInts(p, x) }

// Search returns the result of applying [SearchFloat64s] to the receiver and x.
func (p Float64Slice) Search(x float64) int { return SearchFloat64s(p, x) }

			log.Fatalf("unhandled type: %#v", t)
		}
		return "types.Types[types.TUNSAFEPTR]"

	case *ast.ArrayType:
		if t.Len == nil {
			return fmt.Sprintf("types.NewSlice(%s)", i.subtype(t.Elt))
		}
		return fmt.Sprintf("types.NewArray(%s, %d)", i.subtype(t.Elt), intconst(t.Len))
	case *ast.ChanType:
		dir := "types.Cboth"
		switch t.Dir {
		case ast.SEND:

// expression that yields the *runtime._type value representing typ's
// element type.
func sliceElemRType(pos src.XPos, typ *types.Type) ir.Node {
	base.AssertfAt(typ.IsSlice(), pos, "want slice type, have %v", typ)
	return TypePtrAt(pos, typ.Elem())
}

// concreteRType asserts that typ is not an interface type, and
// returns an expression that yields the *runtime._type value