null pointer value
常見(jiàn)例句
- This marker is usually called the null value, the null list, or the null pointer.
這個(gè)標(biāo)記通常稱作空值(null value)、空列表(null list)或者空指針(null pointer)。 - That means a reference type can have a null pointer, but a value type cannot have a null value.
這意味著引用類型可能有空指針,但是數(shù)值類型不能有空值。 - This is because the compiler has to preserve the value of the null pointer through all conversions.
使用引用作爲(wèi)函數(shù)的蓡數(shù)可能比使用指針更有傚率。 返回 null pointer value