mirror of https://github.com/axmolengine/axmol.git
113 lines
2.6 KiB
C++
113 lines
2.6 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Eric Niebler 2013-present
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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#ifndef RANGES_V3_VIEW_GETLINES_HPP
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#define RANGES_V3_VIEW_GETLINES_HPP
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#include <istream>
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#include <string>
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#include <range/v3/range_fwd.hpp>
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#include <range/v3/iterator/default_sentinel.hpp>
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#include <range/v3/utility/static_const.hpp>
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#include <range/v3/view/facade.hpp>
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#include <range/v3/detail/prologue.hpp>
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namespace ranges
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{
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/// \addtogroup group-views
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/// @{
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struct getlines_view : view_facade<getlines_view, unknown>
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{
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private:
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friend range_access;
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std::istream * sin_;
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std::string str_;
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char delim_;
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struct cursor
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{
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private:
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friend range_access;
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using single_pass = std::true_type;
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getlines_view * rng_ = nullptr;
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public:
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cursor() = default;
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explicit cursor(getlines_view * rng)
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: rng_(rng)
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{}
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void next()
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{
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rng_->next();
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}
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std::string & read() const noexcept
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{
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return rng_->str_;
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}
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bool equal(default_sentinel_t) const
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{
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return !rng_->sin_;
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}
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bool equal(cursor that) const
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{
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return !rng_->sin_ == !that.rng_->sin_;
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}
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};
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void next()
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{
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if(!std::getline(*sin_, str_, delim_))
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sin_ = nullptr;
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}
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cursor begin_cursor()
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{
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return cursor{this};
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}
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public:
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getlines_view() = default;
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getlines_view(std::istream & sin, char delim = '\n')
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: sin_(&sin)
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, str_{}
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, delim_(delim)
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{
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this->next(); // prime the pump
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}
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std::string & cached() noexcept
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{
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return str_;
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}
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};
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/// \cond
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using getlines_range RANGES_DEPRECATED(
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"getlines_range has been renamed getlines_view") = getlines_view;
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/// \endcond
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struct getlines_fn
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{
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getlines_view operator()(std::istream & sin, char delim = '\n') const
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{
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return getlines_view{sin, delim};
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}
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};
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RANGES_INLINE_VARIABLE(getlines_fn, getlines)
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/// @}
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} // namespace ranges
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#include <range/v3/detail/epilogue.hpp>
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#endif
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