F#显式匹配vs函数语法 [英] F# explicit match vs function syntax

问题描述

抱歉，标题模糊，但这部分问题是这两种语法样式分别是什么:

Sorry about the vague title, but part of this question is what these two syntax styles are called:

let foo1 x = 
    match x with
    | 1 -> "one"
    | _ -> "not one"

let foo2 = function 
    | 1 -> "one" 
    | _ -> "not one"

另一部分是两者之间有什么区别，什么时候我想使用其中一个?

The other part is what difference there is between the two, and when I would want to use one or the other?

推荐答案

匹配版本称为模式匹配表达式".该功能版本称为模式匹配功能".在规范的第6.6.4节中找到.

The match version is called a "pattern matching expression". The function version is called a "pattern matching function". Found in section 6.6.4 of the spec.

一个使用另一个是一个风格问题.我只想在需要定义仅是match语句的函数时才使用函数版本.

Using one over the other is a matter of style. I prefer only using the function version when I need to define a function that is only a match statement.

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