// needs to take care of such type expressions.
	if op, _ := x.(*syntax.Operation); op != nil && (op.Op == syntax.Tilde || op.Op == syntax.Or) {
		t := check.typ(&syntax.InterfaceType{MethodList: []*syntax.Field{{Type: x}}})
		// mark t as implicit interface if all went well
		if t, _ := t.(*Interface); t != nil {
			t.implicit = true
		}
		return t
	}
	return check.typ(x)
}

// The result is false if x could be a type element OR an ordinary (value) expression.
func isTypeElem(x ast.Expr) bool {
	switch x := x.(type) {
	case *ast.ArrayType, *ast.StructType, *ast.FuncType, *ast.InterfaceType, *ast.MapType, *ast.ChanType:
		return true
	case *ast.UnaryExpr:
		return x.Op == token.TILDE
	case *ast.BinaryExpr:
		return isTypeElem(x.X) || isTypeElem(x.Y)
	case *ast.ParenExpr:

	wrap := false
	switch op := x.(type) {
	case *ast.UnaryExpr:
		wrap = op.Op == token.TILDE
	case *ast.BinaryExpr:
		wrap = op.Op == token.OR
	}
	if wrap {
		x = &ast.InterfaceType{Methods: &ast.FieldList{List: []*ast.Field{{Type: x}}}}
		t := check.typ(x)
		// mark t as implicit interface if all went well
		if t, _ := t.(*Interface); t != nil {
			t.implicit = true
		}
		return t
	}

		"internal/abi.FuncType":      true,
		"internal/abi.MapType":       true,
		"internal/abi.PtrType":       true,
		"internal/abi.SliceType":     true,
		"internal/abi.StructType":    true,
		"internal/abi.InterfaceType": true,
		"internal/abi.ITab":          true,
	}

	found := findTypes(t, dwarf, want)
	if len(found) != len(want) {
		t.Errorf("found %v, want %v", found, want)
	}
}

		// Check whether this is a pointer to a C union (or class)
		// 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 {

func methodReceiver(op string, v Value, methodIndex int) (rcvrtype *abi.Type, t *funcType, fn unsafe.Pointer) {
	i := methodIndex
	if v.typ().Kind() == abi.Interface {
		tt := (*interfaceType)(unsafe.Pointer(v.typ()))
		if uint(i) >= uint(len(tt.Methods)) {
			panic("reflect: internal error: invalid method index")
		}
		m := &tt.Methods[i]
		if !tt.nameOff(m.Name).IsExported() {

		{"IndexListExpr.Lbrack", Field, 18},
		{"IndexListExpr.Rbrack", Field, 18},
		{"IndexListExpr.X", Field, 18},
		{"Inspect", Func, 0},
		{"InterfaceType", Type, 0},
		{"InterfaceType.Incomplete", Field, 0},
		{"InterfaceType.Interface", Field, 0},
		{"InterfaceType.Methods", Field, 0},
		{"IsExported", Func, 0},
		{"IsGenerated", Func, 21},
		{"KeyValueExpr", Type, 0},
		{"KeyValueExpr.Colon", Field, 0},

		}
		// Non-slice array types are not supported.
	case *ast.StructType:
		// Not supported.
	case *ast.FuncType:
		return &Type{Size: p.PtrSize, Align: p.PtrSize, C: c("void*")}
	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:

		"type:internal/abi.FuncType",
		"type:internal/abi.MapType",
		"type:internal/abi.PtrType",
		"type:internal/abi.SliceType",
		"type:internal/abi.StructType",
		"type:internal/abi.InterfaceType",
		"type:internal/abi.ITab",
		"type:internal/abi.Imethod"} {
		d.defgotype(d.lookupOrDiag(typ))
	}

	// fake root DIE for compile unit DIEs
	var dwroot dwarf.DWDie

</p>

<pre class="ebnf">
Type      = TypeName | TypeLit | "(" Type ")" .
TypeName  = identifier | QualifiedIdent .
TypeLit   = ArrayType | StructType | PointerType | FunctionType | InterfaceType |
	    SliceType | MapType | ChannelType .
</pre>

<p>
The language <a href="#Predeclared_identifiers">predeclares</a> certain type names.