lvalue

lvalue

美 　英

• 网络左值；理解左值；左值表达式

例句

The address-of operator. Takes a single argument that must be an lvalue . Yields the address in memory of that object.

取地址操作符需要一个操作数，其唯一的操作数必须是左值对象，该操作返回操作数对象在内存中的存储地址。

Like the subscript and dereference operators, assignment returns an lvalue .

与下标和解引用操作符一样，赋值操作也返回左值。

It explains the difference between an object and a name and how they relate to the notion of an lvalue .

本章解释了对象和名字的区别，以及它们怎样与左值概念相联系。

Dereference returns an lvalue, so we may use a dereference operator as the left-hand operand of an assignment.

解引用返回左值，因此可将解引用操作符用作赋值操作的左操作数。

An Object is a named region of storage; an lvalue is an expression referring to an object.

这时候的左值可以解释为：对象是一个命名的存储区域，左值是对象引用的表达式。

In general, the left-hand side of an assignment operator always requires an lvalue .

一般地，赋值运算符的左边总是需要一个左值。

The lvalue and rvalue in the assignment statement is separated by a : = (colon plus equal sign).

分配声明中的lvalue和rvalue以：=（冒号加等号）被隔开。

What are the benefits of offering a LValue iterator against a Read Write iterator?

提供一个左值迭代器而不是读写迭代器有什么好处？

You might think of lvalue as meaning location value.

您可以把左值看作是位置值。

More specifically, evaluating an expression that is an lvalue yields an object.

说得更具体一些，计算左值表达式就会产生对象。

A modifiable lvalue cannot have an array type, an incomplete type, or a type with the const attribute.

可更改左值不能为数组类型、（声明）不完善的类型、或者具有常量属性的类型。

Name one case where an lvalue is required.

举出一个需要左值的例子。

The subroutines chapter covers new syntax (prototypes and attributes), plus the brand new lvalue attribute (as of 5. 6. 0).

子程序这章主要针对新的语法（原型和属性），以及左值属性（5.6.0）。

Instead of magic indexes, we get meaningful names (such as v: val. lval for each line's lvalue and line. op for each line's operator).

不使用神奇索引，我们将获得有意义的名称（例如，v：val.lval用于各行的lvalue，line.op用于各行的操作符）。

Some operators, such as assignment, require that one of their operands be an lvalue.

有些操作符，比如赋值，要求其中的一个操作数必须是左值。