[Boost-users] Unicode regex example

13 Aug 2013

      Hi,

here is an unicode regex example, which I want to get matched:

#include <iostream>
#include <boost/regex.hpp>
#include <boost/regex/icu.hpp>

int main()
{
	std::setlocale(LC_ALL, "");

	boost::wregex condition(L"\\p{u}");

	std::wstring test_word(L"Ü");

	if (boost::regex_match(test_word, condition)) {
		std::wcout << L"Matches!" << std::endl;
	}

	boost::wregex condition2(L"[[:upper:]]");

	if (boost::regex_match(test_word, condition2)) {
		std::wcout << L"Matches!" << std::endl;
	}

	boost::u32regex condition3 = boost::make_u32regex(L"\\p{u}");

	if (boost::u32regex_match(test_word, condition3)) {
		std::wcout << L"Matches using lib icu!" << std::endl;
	}

	return 0;
}

Compiled with -lboost_regex -licuuc.

Result: Only the last regex condition matches.

So I have a few questions:

1. Is u32regex + make_u32regex the *only* way to get my regex condition
matched?

2. Why does "upper class" in the second regex condition not match. E.g.
when I use: 

echo "Ü" | grep '[[:upper:]]' 

on command line - it works properly :)

Thanks in advance + regards,

Stefan

[Boost-users] Unicode regex example

Stefan Schweter