没有`mappend`连接两个Data.Text的标准方法 [英] Standard way of joining two Data.Texts without `mappend`

问题描述

我听说在未来的Haskell版本中， Data.Text 将会取代 String s。我遇到的一个问题是仅为列表定义（++）。要连接两个 Text s，我需要使用

I hear that Data.Text is going to replace Strings in future Haskell versions. One issue I have with this is that (++) is defined for lists only. To concatenate two Texts, I need to use

text1 `mappend` text2

快速获取详细信息。理想情况下，我希望能够在这些 Text s上使用 ++ ，但如果不是，另一个是什么替代？我可以定义自己的中缀运算符，但是我希望有一个标准的方法来完成这项工作。

Which gets verbose quickly. Ideally I'd like to be able to use ++ on these Texts, but if not, what is another alternative? I could define my own infix operator, but I'd like a standard way of doing this.

推荐答案

从GHC 7.4确定哪一个版本）有一个与 mappend 相同的预定义的<> 运算符。所以你可以说：

From GHC 7.4 (not sure which point version) there is a predefined <> operator that works the same as mappend. So you'll be able to say

text1 <> text2

这就是标准中缀运算符，但它到处都没有。

So that's the "standard" infix operator, but it's not available everywhere yet.

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