Added thirdparty: boost library

thirdparty/include/boost/url/detail/replacement_field_rule.hpp

@@ -0,0 +1,76 @@
+//
+// Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.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/url
+//
+
+#ifndef BOOST_URL_DETAIL_REPLACEMENT_FIELD_RULE_HPP
+#define BOOST_URL_DETAIL_REPLACEMENT_FIELD_RULE_HPP
+
+#include <boost/url/error.hpp>
+#include <boost/core/detail/string_view.hpp>
+#include <boost/url/grammar/variant_rule.hpp>
+#include <boost/url/grammar/unsigned_rule.hpp>
+
+namespace boost {
+namespace urls {
+namespace detail {
+
+// replacement_field ::=  "{" [arg_id] [":" format_spec "}"
+struct replacement_field_rule_t
+{
+    using value_type = core::string_view;
+
+    BOOST_URL_DECL
+    system::result<value_type>
+    parse(
+        char const*& it,
+        char const* end) const noexcept;
+};
+
+constexpr replacement_field_rule_t replacement_field_rule{};
+
+// identifier        ::=  id_start id_continue*
+// id_start          ::=  "a"..."z" | "A"..."Z" | "_"
+// id_continue       ::=  id_start | digit
+struct identifier_rule_t
+{
+    using value_type = core::string_view;
+
+    BOOST_URL_DECL
+    system::result<value_type>
+    parse(
+        char const*& it,
+        char const* end) const noexcept;
+};
+
+constexpr identifier_rule_t identifier_rule{};
+
+// arg_id            ::=  integer | identifier
+// integer           ::=  digit+
+// digit             ::=  "0"..."9"
+static constexpr auto arg_id_rule =
+    grammar::variant_rule(
+        identifier_rule,
+        grammar::unsigned_rule<std::size_t>{});
+
+struct format_spec_rule_t
+{
+    using value_type = core::string_view;
+
+    system::result<value_type>
+    parse(
+        char const*& it,
+        char const* end) const noexcept;
+};
+
+constexpr format_spec_rule_t format_spec_rule{};
+
+} // detail
+} // urls
+} // boost
+
+#endif