Added thirdparty: boost library

thirdparty/include/boost/url/grammar/not_empty_rule.hpp

@@ -0,0 +1,108 @@
+//
+// 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_NOT_EMPTY_RULE_HPP
+#define BOOST_URL_GRAMMAR_NOT_EMPTY_RULE_HPP
+
+#include <boost/url/detail/config.hpp>
+#include <boost/url/error_types.hpp>
+#include <boost/url/grammar/type_traits.hpp>
+
+namespace boost {
+namespace urls {
+namespace grammar {
+
+/** Match another rule, if the result is not empty
+
+    This adapts another rule such that
+    when an empty string is successfully
+    parsed, the result is an error.
+
+    @par Value Type
+    @code
+    using value_type = typename Rule::value_type;
+    @endcode
+
+    @par Example
+    Rules are used with the function @ref parse.
+    @code
+    system::result< decode_view > rv = parse( "Program%20Files",
+        not_empty_rule( pct_encoded_rule( unreserved_chars ) ) );
+    @endcode
+
+    @param r The rule to match
+
+    @see
+        @ref parse,
+        @ref pct_encoded_rule,
+        @ref unreserved_chars.
+*/
+#ifdef BOOST_URL_DOCS
+template<class Rule>
+constexpr
+__implementation_defined__
+not_empty_rule( Rule r );
+#else
+template<class R>
+struct not_empty_rule_t
+{
+    using value_type =
+        typename R::value_type;
+
+    auto
+    parse(
+        char const*& it,
+        char const* end) const ->
+            system::result<value_type>;
+
+    template<class R_>
+    friend
+    constexpr
+    auto
+    not_empty_rule(
+        R_ const& r) ->
+            not_empty_rule_t<R_>;
+
+private:
+    constexpr
+    not_empty_rule_t(
+        R const& r) noexcept
+        : r_(r)
+    {
+    }
+
+    R r_;
+};
+
+template<class Rule>
+auto
+constexpr
+not_empty_rule(
+    Rule const& r) ->
+        not_empty_rule_t<Rule>
+{
+    // If you get a compile error here it
+    // means that your rule does not meet
+    // the type requirements. Please check
+    // the documentation.
+    static_assert(
+        is_rule<Rule>::value,
+        "Rule requirements not met");
+
+    return { r };
+}
+#endif
+
+} // grammar
+} // urls
+} // boost
+
+#include <boost/url/grammar/impl/not_empty_rule.hpp>
+
+#endif