.net - .NET Regex 类的运算符优先级在哪里记录？

Question

.NET Regex 记录的运算符优先级顺序在哪里？类(class)？

我看到this ，但那是针对 JScript 的。

此外，这似乎不受 RegexOptions.ECMAScript 的影响。 ，但确认会有所帮助。

Answer 1

我认为真正的答案并不像你想的那么简单。简短(且不完整)的答案只是“所有表达式都从左到右求值”......

长答案去这里。

http://msdn.microsoft.com/en-us/library/e347654k.aspx

The .NET Framework regular expression engine is a backtracking regular expression matcher that incorporates a traditional Nondeterministic Finite Automaton (NFA) engine ... traditional NFA engines perform pattern matching, their processing order is driven by the regular expression pattern. As it processes a particular language element, the engine uses greedy matching; that is, it matches as much of the input string as it possibly can. But it also saves its state after successfully matching a subexpression. If a match eventually fails, the engine can return to a saved state so it can try additional matches.

编辑:忘记回答问题的第二部分。

关于 RegexOptions.ECMAScript，您可以引用以下文档:

http://msdn.microsoft.com/en-us/library/yd1hzczs.aspx

The behavior of ECMAScript and canonical regular expressions differs in three areas: character class syntax, self-referencing capturing groups, and octal versus backreference interpretation.

看起来“订单”没有受到影响，但可能还有其他问题。文档很好地说明了差异。