return n.Pos()
			// TODO(gri) need to take TagList into account
		case *Field:
			if n.Type != nil {
				m = n.Type
				continue
			}
			m = n.Name
		case *InterfaceType:
			if l := lastField(n.MethodList); l != nil {
				m = l
				continue
			}
			return n.Pos()
		case *FuncType:
			if l := lastField(n.ResultList); l != nil {
				m = l
				continue
			}

	// 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)
}

		var f *Field
		if p.tok == _Name {
			f = p.methodDecl()
		}
		if f == nil || f.Name == nil {
			f = p.embeddedElem(f)
		}
		typ.MethodList = append(typ.MethodList, f)
		return false
	})

	return typ
}

// Result = Parameters | Type .
func (p *parser) funcResult() []*Field {
	if trace {
		defer p.trace("funcResult")()
	}