Unicode正则表达式C ++ [英] unicode regular expressions c++

问题描述

我想通过使用正则表达式匹配单词février" 或任何其他月份.

I want to match the word "février" or any other month by using regular expression.

正则表达式:

^(JANVIER | FEVRIER | MARS | AVRIL | MAI | JUIN | JUILLET | AOUT | SEPTEMBRE | OCBOB | NOVEMBRE | DECEMBRE | Jan | Feb | Mar | Apr | May | Jun | Jun | Jul | Aug | Sep | Oct | Nov | Dec | [jJ] anvier | [Ff]évrier| [mM] ars | [aA] vril | [mM] ai | [jJ] uin | [jJ] uillet | [aA] o [éû] t | aout | [sS] eptembre | [oO] toc || [nN] ovembre | [dD] [eé] cembre)$

^(JANVIER|FEVRIER|MARS|AVRIL|MAI|JUIN|JUILLET|AOUT|SEPTEMBRE|OCTOBRE|NOVEMBRE|DECEMBRE|Jan|Feb|Mar|Apr|May|Jun|JUN|Jul|Aug|Sep|Oct|Nov|Dec|[jJ]anvier|[Ff]évrier|[mM]ars|[aA]vril|[mM]ai|[jJ]uin|[jJ]uillet|[aA]o[éû]t|aout|[sS]eptembre|[oO]ctobre|[nN]ovembre|[dD][eé]cembre)$

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问题

问题是我无法匹配包含Unicode字母的单词:à，é，è等. 我在以下网站上找到: Unicode 表示unicode值é的\u00E9.我可以将此值整合到正则表达式中吗?以及如何在正则表达式中使用unicode值.

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Problem

The problem is that I cannot match the words that contain unicode letters: à,é,è etc. I found on the following website: Unicode that the unicode value of é is \u00E9. Can i integrate this value in the regular expression? and how can I use unicode values in regular expressions.

void returnValue(string pattern)
{
    bool x = false;
    const boost::regex e("février");
    x = boost::regex_search(pattern.c_str(),e);
    if(x){ cout <<"found"<<endl; }
}

推荐答案

您可以将unicode与boost :: regex匹配.有两种方法可以做到这一点.

You can match a unicode with boost::regex. There are two ways to do it.

1. 如果平台的wchar_t可以容纳Unicode字符，并且平台的C/C ++运行时正确处理宽字符常量，则依靠wchar_t. (这有一些陷阱，建议不要在我提供的链接中阅读)

1. Rely on wchar_t if your platform's wchar_t can hold Unicode characters and your platform's C/C++ runtime correctly handles wide character constants. (this has few pitfalls, not suggested, read about this in the link I provided)

使用Unicode感知的正则表达式类型(boost :: u32regex).必须将Boost配置为通过使用Unicode和ICU支持进行构建

Use a Unicode aware regular expression type (boost::u32regex). Boost has to be configured to enable this via Building With Unicode and ICU Support

http://www. boost.org/doc/libs/1_42_0/libs/regex/doc/html/boost_regex/unicode.html

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