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Telegram/ThirdParty/range-v3/include/range/v3/view/getlines.hpp

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