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

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+/// \file
+// Range v3 library
+//
+//  Copyright Eric Niebler 2014-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_C_STR_HPP
+#define RANGES_V3_VIEW_C_STR_HPP
+
+#include <type_traits>
+
+#include <range/v3/range_fwd.hpp>
+
+#include <range/v3/iterator/unreachable_sentinel.hpp>
+#include <range/v3/utility/static_const.hpp>
+#include <range/v3/view/delimit.hpp>
+#include <range/v3/view/subrange.hpp>
+
+#include <range/v3/detail/prologue.hpp>
+
+namespace ranges
+{
+    /// \cond
+    namespace detail
+    {
+        template<typename T>
+        struct is_char_type_ : std::false_type
+        {};
+
+        template<>
+        struct is_char_type_<char> : std::true_type
+        {};
+
+        template<>
+        struct is_char_type_<wchar_t> : std::true_type
+        {};
+
+        template<>
+        struct is_char_type_<char16_t> : std::true_type
+        {};
+
+        template<>
+        struct is_char_type_<char32_t> : std::true_type
+        {};
+
+        template<typename T>
+        using is_char_type = is_char_type_<meta::_t<std::remove_cv<T>>>;
+    } // namespace detail
+    /// \endcond
+
+    /// \addtogroup group-views
+    /// @{
+    namespace views
+    {
+        /// View a `\0`-terminated C string (e.g. from a const char*) as a
+        /// range.
+        struct c_str_fn
+        {
+            // Fixed-length
+            template(typename Char, std::size_t N)(
+                requires detail::is_char_type<Char>::value) //
+            ranges::subrange<Char *> operator()(Char (&sz)[N]) const
+            {
+                return {&sz[0], &sz[N - 1]};
+            }
+
+            // Null-terminated
+            template(typename Char)(
+                requires detail::is_char_type<Char>::value) //
+            ranges::delimit_view<
+                ranges::subrange<Char *, ranges::unreachable_sentinel_t>,
+                meta::_t<std::remove_cv<Char>>> //
+            operator()(Char * sz) const volatile
+            {
+                using ch_t = meta::_t<std::remove_cv<Char>>;
+                return ranges::views::delimit(sz, ch_t(0));
+            }
+        };
+
+        /// \relates c_str_fn
+        /// \ingroup group-views
+        RANGES_INLINE_VARIABLE(c_str_fn, c_str)
+    } // namespace views
+} // namespace ranges
+
+#include <range/v3/detail/epilogue.hpp>
+
+#endif