74 lines
1.5 KiB
C++
74 lines
1.5 KiB
C++
///////////////////////////////////////////////////////////////
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// Copyright 2015 John Maddock. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
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//
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#include <boost/config.hpp>
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#ifndef BOOST_NO_CXX11_HDR_REGEX
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#include "performance.hpp"
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#include <regex>
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struct std_regex : public abstract_regex
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{
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private:
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std::regex e;
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std::cmatch what;
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public:
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virtual bool set_expression(const char* pe, bool isperl)
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{
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try
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{
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e.assign(pe, isperl ? std::regex::ECMAScript : std::regex::extended);
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}
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catch(const std::exception&)
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{
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return false;
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}
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return true;
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}
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virtual bool match_test(const char* text);
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virtual unsigned find_all(const char* text);
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virtual std::string name();
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struct initializer
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{
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initializer()
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{
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std_regex::register_instance(boost::shared_ptr<abstract_regex>(new std_regex));
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}
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void do_nothing()const {}
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};
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static const initializer init;
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};
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const std_regex::initializer std_regex::init;
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bool std_regex::match_test(const char * text)
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{
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return regex_match(text, what, e);
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}
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unsigned std_regex::find_all(const char * text)
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{
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std::regex_iterator<const char*> i(text, text + std::strlen(text), e), j;
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unsigned count = 0;
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while(i != j)
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{
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++i;
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++count;
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}
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return count;
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}
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std::string std_regex::name()
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{
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init.do_nothing();
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return "std::regex";
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}
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#endif
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