在golang中，如果我在函數(shù)中返回一個(gè)struct類(lèi)型，會(huì)出現(xiàn)編譯錯(cuò)誤，我必須使用struct的指針作為返回類(lèi)型，才能通過(guò)函數(shù)調(diào)用直接實(shí)現(xiàn)成員訪(fǎng)問(wèn)。這是為什么？foo() 不返回 Employee 類(lèi)型的臨時(shí)變量嗎？package maintype Employee struct {ID intName stringAddress stringPosition stringSalary intManagerID int}var dilbert Employeefunc foo() Employee {    employee := Employee{}    return employee}func bar() *Employee {    employee := Employee{}    return &employee}func main() {    dilbert.Salary = 1    var b = foo()    b.Salary = 1    bar().Salary = 1    // this is good    foo().Salary = 1    // this line has the compilation error cannot assign to foo().Salary}