}

// Close closes the channel v.
// It panics if v's Kind is not [Chan] or
// v is a receive-only channel.
func (v Value) Close() {
	v.mustBe(Chan)
	v.mustBeExported()
	tt := (*chanType)(unsafe.Pointer(v.typ()))
	if ChanDir(tt.Dir)&SendDir == 0 {
		panic("reflect: close of receive-only channel")
	}

	chanclose(v.pointer())
}

// ParenExpr, is correctly formatted with parens.
// Test case for issue #63362.
func TestChanType(t *testing.T) {
	expr := &ast.UnaryExpr{
		Op: token.ARROW,
		X: &ast.CallExpr{
			Fun: &ast.ChanType{
				Dir:   ast.RECV,
				Value: &ast.Ident{Name: "int"},
			},
			Args: []ast.Expr{&ast.Ident{Name: "nil"}},
		},
	}
	var buf bytes.Buffer
	if err := Fprint(&buf, fset, expr); err != nil {

		*ast.IndexExpr,
		*ast.SliceExpr,
		*ast.TypeAssertExpr,
		*ast.StarExpr,
		*ast.KeyValueExpr,
		*ast.ArrayType,
		*ast.StructType,
		*ast.FuncType,
		*ast.InterfaceType,
		*ast.MapType,
		*ast.ChanType:
		// These expression are never untyped - nothing to do.
		// The respective sub-expressions got their final types
		// upon assignment or use.
		if debug {

		*syntax.ListExpr,
		//*syntax.StarExpr,
		*syntax.KeyValueExpr,
		*syntax.ArrayType,
		*syntax.StructType,
		*syntax.FuncType,
		*syntax.InterfaceType,
		*syntax.MapType,
		*syntax.ChanType:
		// These expression are never untyped - nothing to do.
		// The respective sub-expressions got their final types
		// upon assignment or use.
		if debug {

			{DW_AT_name, DW_FORM_string},
			{DW_AT_type, DW_FORM_ref_addr},
			{DW_AT_byte_size, DW_FORM_udata},
			{DW_AT_go_kind, DW_FORM_data1},
			{DW_AT_go_runtime_type, DW_FORM_addr},
		},
	},

	/* CHANTYPE */
	{
		DW_TAG_typedef,
		DW_CHILDREN_no,
		[]dwAttrForm{
			{DW_AT_name, DW_FORM_string},
			{DW_AT_type, DW_FORM_ref_addr},
			{DW_AT_go_kind, DW_FORM_data1},
			{DW_AT_go_runtime_type, DW_FORM_addr},

	dwarf, err := f.DWARF()
	if err != nil {
		t.Fatalf("error reading DWARF: %v", err)
	}

	want := map[string]bool{
		"internal/abi.Type":          true,
		"internal/abi.ArrayType":     true,
		"internal/abi.ChanType":      true,
		"internal/abi.FuncType":      true,
		"internal/abi.MapType":       true,
		"internal/abi.PtrType":       true,
		"internal/abi.SliceType":     true,
		"internal/abi.StructType":    true,

		// type that contains a pointer.
		if unionWithPointer[t.X] {
			return true
		}
		return p.hasPointer(f, t.X, false)
	case *ast.FuncType, *ast.InterfaceType, *ast.MapType, *ast.ChanType:
		return true
	case *ast.Ident:
		// TODO: Handle types defined within function.
		for _, d := range p.Decl {
			gd, ok := d.(*ast.GenDecl)
			if !ok || gd.Tok != token.TYPE {
				continue
			}

		{"CaseClause.Case", Field, 0},
		{"CaseClause.Colon", Field, 0},
		{"CaseClause.List", Field, 0},
		{"ChanDir", Type, 0},
		{"ChanType", Type, 0},
		{"ChanType.Arrow", Field, 1},
		{"ChanType.Begin", Field, 0},
		{"ChanType.Dir", Field, 0},
		{"ChanType.Value", Field, 0},
		{"CommClause", Type, 0},
		{"CommClause.Body", Field, 0},
		{"CommClause.Case", Field, 0},
		{"CommClause.Colon", Field, 0},

	}

	// Needed by the prettyprinter code for interface inspection.
	for _, typ := range []string{
		"type:internal/abi.Type",
		"type:internal/abi.ArrayType",
		"type:internal/abi.ChanType",
		"type:internal/abi.FuncType",
		"type:internal/abi.MapType",
		"type:internal/abi.PtrType",
		"type:internal/abi.SliceType",
		"type:internal/abi.StructType",
		"type:internal/abi.InterfaceType",

	case *ast.InterfaceType:
		return &Type{Size: 2 * p.PtrSize, Align: p.PtrSize, C: c("GoInterface")}
	case *ast.MapType:
		return &Type{Size: p.PtrSize, Align: p.PtrSize, C: c("GoMap")}
	case *ast.ChanType:
		return &Type{Size: p.PtrSize, Align: p.PtrSize, C: c("GoChan")}
	case *ast.Ident:
		goTypesFixup := func(r *Type) *Type {
			if r.Size == 0 { // int or uint
				rr := new(Type)
				*rr = *r