| /* |
| * Copyright Andrey Semashev 2007 - 2015. |
| * 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_0.txt) |
| */ |
| /*! |
| * \file begins_with.hpp |
| * \author Andrey Semashev |
| * \date 30.03.2008 |
| * |
| * This header contains a predicate for checking if the provided string begins with a substring. |
| */ |
| |
| #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BEGINS_WITH_HPP_INCLUDED_ |
| #define BOOST_LOG_UTILITY_FUNCTIONAL_BEGINS_WITH_HPP_INCLUDED_ |
| |
| #include <boost/log/detail/config.hpp> |
| #include <boost/log/detail/header.hpp> |
| |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| #pragma once |
| #endif |
| |
| namespace boost { |
| |
| BOOST_LOG_OPEN_NAMESPACE |
| |
| //! The \c begins_with functor |
| struct begins_with_fun |
| { |
| typedef bool result_type; |
| |
| template< typename T, typename U > |
| bool operator() (T const& left, U const& right) const |
| { |
| typedef typename T::const_iterator left_iterator; |
| typedef typename U::const_iterator right_iterator; |
| |
| left_iterator left_it = left.begin(), left_end = left.end(); |
| right_iterator right_it = right.begin(), right_end = right.end(); |
| for (; left_it != left_end && right_it != right_end; ++left_it, ++right_it) |
| { |
| if (*left_it != *right_it) |
| break; |
| } |
| return right_it == right_end; |
| } |
| }; |
| |
| BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| |
| } // namespace boost |
| |
| #include <boost/log/detail/footer.hpp> |
| |
| #endif // BOOST_LOG_UTILITY_FUNCTIONAL_BEGINS_WITH_HPP_INCLUDED_ |