非贪婪匹配仍然过于贪婪 [英] Non-greedy match is still too greedy

问题描述

我有一个需要捕获最短匹配项的正则表达式模式，但在嵌套该模式的情况下，惰性匹配不起作用.这就是我的意思:

I have a regex pattern that needs to capture the shortest matches, but the lazy match isn't working in cases where that pattern is nested. Here's what I mean:

正则表达式:

/{{.*?}}/

示例字符串:

{{This}} is {{an example {{sentence}}}}

在上面的例子中，我希望拉取 {{This}} 和 {{sentence}}，因为它们是最短的匹配，但是我正在获取 {{This}} 和 {{an example {{sentence}}.为什么非贪婪匹配仍然如此贪婪 - 或者更确切地说，我哪里出错了?

In the above example, I'm expecting to pull {{This}} and {{sentence}}, as these are the shortest matches, but instead I am getting {{This}} and {{an example {{sentence}}. Why is the non-greedy match still being so greedy - or rather, where am I going wrong?

推荐答案

尝试:{{[^{]*?}}这是利用{"字符不应出现在内部字符串中的事实.它确实符合您的预期.

Try: {{[^{]*?}} This is using the fact that the '{' character should not appear in the inner strings. It does match what you expect.

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