为什么正则表达式不能使用关键字而不是字符? [英] Why can't Regular Expressions use keywords instead of characters?

问题描述

好吧，我几乎不了解RegEx基础知识，但是为什么他们不能将其设计为使用关键字(例如SQL)而不是一些神秘的通配符和符号?

Okay, I barely understand RegEx basics, but why couldn't they design it to use keywords (like SQL) instead of some cryptic wildcard characters and symbols?

由于RegEx是在运行时解释/解析的，因此它是否具有性能? (未编译)

Is it for performance since the RegEx is interpreted/parsed at runtime? (not compiled)

还是为了提高写作速度?考虑到当您学习一些简单"字符组合时，键入1个字符而不是关键字会变得更容易吗?

Or maybe for speed of writing? Considering that when you learn some "simple" character combinations it becomes easier to type 1 character instead of a keyword?

推荐答案

您真的想要这个吗?

Pattern findGamesPattern = Pattern.With.Literal(@"<div")
    .WhiteSpace.Repeat.ZeroOrMore
    .Literal(@"class=""game""").WhiteSpace.Repeat.ZeroOrMore.Literal(@"id=""")
    .NamedGroup("gameId", Pattern.With.Digit.Repeat.OneOrMore)
    .Literal(@"-game""")
    .NamedGroup("content", Pattern.With.Anything.Repeat.Lazy.ZeroOrMore)
    .Literal(@"<!--gameStatus")
    .WhiteSpace.Repeat.ZeroOrMore.Literal("=").WhiteSpace.Repeat.ZeroOrMore
    .NamedGroup("gameState", Pattern.With.Digit.Repeat.OneOrMore)
    .Literal("-->");

好，但是这是您的葬礼，伙计.

在此处下载执行此操作的库:
http://flimflan.com/blog/ReadableRegularExpressions.aspx

Download the library that does this here:
http://flimflan.com/blog/ReadableRegularExpressions.aspx

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