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///////////////////////////////////////////////////////////////
// Copyright 2015 John Maddock. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
//
#include <boost/config.hpp>
#include "performance.hpp"
#include <boost/xpressive/xpressive.hpp>
using namespace boost::xpressive;
struct xpressive_regex : public abstract_regex
{
private:
cregex e;
cmatch what;
public:
virtual bool set_expression(const char* pe, bool isperl)
{
if(!isperl)
return false;
try
{
e = cregex::compile(pe, regex_constants::ECMAScript);
}
catch(const std::exception&)
{
return false;
}
return true;
}
virtual bool match_test(const char* text);
virtual unsigned find_all(const char* text);
virtual std::string name();
struct initializer
{
initializer()
{
xpressive_regex::register_instance(boost::shared_ptr<abstract_regex>(new xpressive_regex));
}
void do_nothing()const {}
};
static const initializer init;
};
const xpressive_regex::initializer xpressive_regex::init;
bool xpressive_regex::match_test(const char * text)
{
return regex_match(text, what, e);
}
unsigned xpressive_regex::find_all(const char * text)
{
cregex_token_iterator i(text, text + std::strlen(text), e), j;
unsigned count = 0;
while(i != j)
{
++i;
++count;
}
return count;
}
std::string xpressive_regex::name()
{
init.do_nothing();
return "boost::xpressive::cregex";
}
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