在编程方面，语义是什么意思？ [英] In terms of programming, what do semantics mean?

问题描述

这是 Eric Lippert的博客：

鉴于不幸的情况，它
有意义存储
机制，然后是
语义秒。

容易获得语义意味着什么的字典定义，但它在计算机术语方面意味着什么

It's easy to get a dictionary definition of what "semantic" means but what does it mean in terms of computer jargon?

推荐答案

但是在计算机术语方面是什么意思？ $ b

but what does it mean in terms of computer jargon?

本质上是一样的。示例：

Essentially the same thing. Example:

x = 5;

上面是语法该术语的意义（即语义）是将值5分配给名为 x 的符号（变量，无论什么）。不同的语言提供不同的语法来提供相同的语义。例如，上面的任务将写为

The above is the syntax (representation). The meaning (i.e. the semantics) of this term is to assign the value 5 to a symbol (variable, whatever) called x. Different languages offer different syntaxes to provide the same semantics. For example, the above assignment would be written as

x := 5;

，以及

x <- 5

在所有情况下，意义本质上是相同的。但有时，相同的语法也可以具有不同的含义，取决于语言和/或上下文。 VB例如重新定义equals运算符意味着两个不同的东西。

in several other languages. In all cases, the meaning is essentially the same. But sometimes, the same syntaxes can also have different meanings, depending on the language and/or context. VB for example redefines the equals operator to mean two different things. First, an assignment, just as above.

其次，在下面的代码段中，不是赋值，而是赋值比较值：

Secondly, in the following code sippet, rather than assigning, it takes the meaning of comparing two values:

If x = 5 Then Console.WriteLine("x is 5")

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