转换和转换有什么区别? [英] What is the difference between casting and conversion?
问题描述
Eric Lippert 在这个问题中的评论让我彻底糊涂了.C# 中的强制转换和转换有什么区别?
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 Eric 想说的是:
I believe what Eric is trying to say is:
强制转换是一个描述语法的术语(因此有语法的含义).
Casting is a term describing syntax (hence the Syntactic meaning).
转化是一个术语,描述在幕后实际采取的行动(以及语义的含义).
Conversion is a term describing what actions are actually taken behind the scenes (and thus the Semantic meaning).
一个 cast-expression 用于转换明确表达给定类型.
A cast-expression is used to convert explicitly an expression to a given type.
和
形式为 (T)E 的强制转换表达式,其中 T 是一个类型,E 是一个一元表达式,执行显式E 值的转换(第 13.2 节)输入 T.
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.
似乎通过说语法中的强制转换运算符执行显式转换来支持这一点.
Seems to back that up by saying that a cast operator in the syntax performs an explicit conversion.
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