Added thirdparty: boost library

2026-08-12 18:28:07 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
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+//
+// 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/url
+//
+
+#ifndef BOOST_URL_GRAMMAR_IMPL_VARIANT_RULE_HPP
+#define BOOST_URL_GRAMMAR_IMPL_VARIANT_RULE_HPP
+
+#include <boost/url/grammar/error.hpp>
+#include <boost/url/grammar/parse.hpp>
+#include <cstdint>
+#include <type_traits>
+
+namespace boost {
+namespace urls {
+namespace grammar {
+
+namespace detail {
+
+// must come first
+template<
+    class R0,
+    class... Rn,
+    std::size_t I>
+auto
+parse_variant(
+    char const*&,
+    char const*,
+    detail::tuple<
+        R0, Rn...> const&,
+    std::integral_constant<
+        std::size_t, I> const&,
+    std::false_type const&) ->
+        system::result<variant<
+            typename R0::value_type,
+            typename Rn::value_type...>>
+{
+    // no match
+    BOOST_URL_RETURN_EC(
+        error::mismatch);
+}
+
+template<
+    class R0,
+    class... Rn,
+    std::size_t I>
+auto
+parse_variant(
+    char const*& it,
+    char const* const end,
+    detail::tuple<
+        R0, Rn...> const& rn,
+    std::integral_constant<
+        std::size_t, I> const&,
+    std::true_type const&) ->
+        system::result<variant<
+            typename R0::value_type,
+            typename Rn::value_type...>>
+{
+    auto const it0 = it;
+    auto rv = parse(
+        it, end, get<I>(rn));
+    if( rv )
+        return variant<
+            typename R0::value_type,
+            typename Rn::value_type...>{
+                variant2::in_place_index_t<I>{}, *rv};
+    it = it0;
+    return parse_variant(
+        it, end, rn,
+        std::integral_constant<
+            std::size_t, I+1>{},
+        std::integral_constant<bool,
+            ((I + 1) < (1 +
+                sizeof...(Rn)))>{});
+}
+
+} // detail
+
+template<class R0, class... Rn>
+auto
+variant_rule_t<R0, Rn...>::
+parse(
+    char const*& it,
+    char const* end) const ->
+        system::result<value_type>
+{
+    return detail::parse_variant(
+        it, end, rn_,
+        std::integral_constant<
+            std::size_t, 0>{},
+        std::true_type{});
+}
+
+//------------------------------------------------
+
+template<class R0, class... Rn>
+auto
+constexpr
+variant_rule(
+    R0 const& r0,
+    Rn const&... rn) noexcept ->
+        variant_rule_t<R0, Rn...>
+{
+    return { r0, rn... };
+}
+
+} // grammar
+} // urls
+} // boost
+
+#endif