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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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