嵌套正则表达式替换C＃ [英] Nested Regex Replace in C#

问题描述

我真的不认为与正则表达式不错，但我了解的基础知识。我试图找出如何做一个有条件的替代基于在比赛中一定的价值。例如：

I'm not really that good with regex, but I understand the basics. I'm trying to figure out how to do a conditional replace based upon a certain value in the match. For example:

假设我有看起来像这样的一些嵌套的字符串结构：

Suppose I have some nested string structure that look like this:

"[id value]"//id and value are space delimited.  id will never have spaces

ID 一些字符串ID名称的 [] 项和值是另外一个嵌套的 [值id] 项。为值是空的，但我并不担心现在的可能。

id is some string id that names the [] item and value is another nested [id value] item. Its possible for value to be empty, but I'm not worried about that for now.

如果我有是这样的：

A) "[vehicle [toyota camry]]"
or
B) "[animal [dog rufus]]"

我希望能够调用某个函数根据 ID 作为regex.Replace从内最 [] 结构

I'd like to be able to call a certain function (ToString() for example) based upon id that gets output as the regex.Replace is executed from the inner most [] structure.

从例子去伪代码：

string Return = "{0}";
var 1stValueComboID = GetInteriorValue/IDFrom("[vehicle [toyota camry]]");
//1stValueComboID.ToString() = "Company: Toyota, Make: Camry"

Return = Format.String(Return,1stValueIDCombo.ToString());


var 2stValueComboID = GetSecondValue/IDFrom("[vehicle [toyota camry]]");
//2stValueComboID.ToString() = "Type: Vehicle, {0}"

Return = Format.String(Return,2ndValueIDCombo.ToString());

这显然样本无关与正则表达式，但它希望说明什么样的我正在努力做的。

This sample obviously has nothing to do with regex, but it hopefully illustrates kind of what I'm trying to do.

推荐答案

JoshD正确地指出，你所提出的（有配对括号）这个语法不能使用解析正则表达式。您需要构建具有递归下降的行为自定义分析器。

JoshD correctly points out that this grammar you've proposed (having matching pairs of brackets) cannot be parsed using a regular expression. You need to construct a custom parser with recursive descent behavior.

这篇关于嵌套正则表达式替换C＃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！