在构建支持 Unicode 国际组件 (ICU) 的 boost::regex 1.52 版库后,匹配不区分大小写的正则表达式似乎无法按预期处理大写和小写德语变音字符。
static const std::string pattern("^.*" "\303\226" ".*$");
static const std::string test1("SCH" "\303\226" "NE");
static const std::string test2("sch" "\303\266" "ne");
static const boost::regex exp(pattern, boost::regex::icase);
const char *result = (boost::regex_match(test1, exp)) ? "Match" : "NoMatch";
std::cout << "Testing \"" << test1 << "\" against pattern \"" << pattern
<< "\" : " << result << std::endl;
result = (boost::regex_match(test2, exp)) ? "Match" : "NoMatch";
std::cout << "Testing \"" << test2 << "\" against pattern \"" << pattern
<< "\" : " << result << std::endl;
产量:
Testing "SCHÖNE" against pattern "^.*Ö.*$" : Match
Testing "schöne" against pattern "^.*Ö.*$" : NoMatch
最佳答案
Working with Unicode and ICU string types .
#include <iostream>
#include <boost/regex.hpp>
#include <boost/regex/icu.hpp>
int main()
{
static const std::string pattern("^.*" "\303\226" ".*$");
static const std::string test1("SCH" "\303\226" "NE");
static const std::string test2("sch" "\303\266" "ne");
static const boost::u32regex exp=boost::make_u32regex(pattern, boost::regex::icase);
const char *result = (boost::u32regex_match(test1, exp)) ? "Match" : "NoMatch";
std::cout << "Testing \"" << test1 << "\" against pattern \"" << pattern
<< "\" : " << result << std::endl;
result = (boost::u32regex_match(test2, exp)) ? "Match" : "NoMatch";
std::cout << "Testing \"" << test2 << "\" against pattern \"" << pattern
<< "\" : " << result << std::endl;
}
关于c++ - boost::regex 与 UTF-8 不区分大小写匹配(例如,大写与小写变音),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15906136/