Added thirdparty: boost library

thirdparty/include/boost/beast/core/string.hpp

@@ -0,0 +1,80 @@
+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// 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)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_STRING_HPP
+#define BOOST_BEAST_STRING_HPP
+
+#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/core/string_type.hpp>
+
+namespace boost {
+namespace beast {
+
+/** Returns `true` if two strings are equal, using a case-insensitive comparison.
+
+    The case-comparison operation is defined only for low-ASCII characters.
+
+    @param lhs The string on the left side of the equality
+
+    @param rhs The string on the right side of the equality
+*/
+BOOST_BEAST_DECL
+bool
+iequals(
+    beast::string_view lhs,
+    beast::string_view rhs);
+
+/** A case-insensitive less predicate for strings.
+
+    The case-comparison operation is defined only for low-ASCII characters.
+
+    As of C++14, containers using this class as the `Compare` type will take part
+    in heterogeneous lookup if the search term is implicitly convertible to
+    @ref string_view.
+*/
+struct iless
+{
+    BOOST_BEAST_DECL
+    bool
+    operator()(
+        string_view lhs,
+        string_view rhs) const;
+
+    using is_transparent = void;
+};
+
+/** A case-insensitive equality predicate for strings.
+
+    The case-comparison operation is defined only for low-ASCII characters.
+
+    As of C++14, containers using this class as the `Compare` type will take part
+    in heterogeneous lookup if the search term is implicitly convertible to
+    @ref string_view.
+*/
+struct iequal
+{
+    bool
+    operator()(
+        string_view lhs,
+        string_view rhs) const
+    {
+        return iequals(lhs, rhs);
+    }
+
+    using is_transparent = void;
+};
+
+} // beast
+} // boost
+
+#ifdef BOOST_BEAST_HEADER_ONLY
+#include <boost/beast/core/impl/string.ipp>
+#endif
+
+#endif