是什么铸造和转换之间的区别？ [英] What is the difference between casting and conversion?

问题描述

埃里克利珀在这个问题已经离开了我彻底糊涂了。在C＃铸造和转换之间的区别是什么？

Eric Lippert's comments in this question have left me thoroughly confused. What is the difference between casting and conversion in C#?

推荐答案

我相信埃里克想说的是：

I believe what Eric is trying to say is:

铸造是一个术语，描述语法（因此的句法的意思）。

Casting is a term describing syntax (hence the Syntactic meaning).

转换是一种术语，描述哪些行动实际上采取了幕后（因此的语义的意思）。

Conversion is a term describing what actions are actually taken behind the scenes (and thus the Semantic meaning).

一个铸前pression用于转换
  明确一个前pression给定
  类型。

A cast-expression is used to convert explicitly an expression to a given type.

和

形式（T），E的投-EX pression，
  其中T是一个类型和E是
  一元-EX pression，执行一个明确的
  E的值转换（13.2节）
  为T类型。

A cast-expression of the form (T)E, where T is a type and E is a unary-expression, performs an explicit conversion (§13.2) of the value of E to type T.

似乎回到了起来说，在语法转换运算符进行显式转换。

Seems to back that up by saying that a cast operator in the syntax performs an explicit conversion.

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