Added thirdparty: boost library

2026-08-26 00:58:09 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
@@ -0,0 +1,59 @@
+/*=============================================================================
+    Copyright (c) 2011 Jamboree
+    Copyright (c) 2014 Lee Clagett
+
+    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)
+==============================================================================*/
+#if !defined(BOOST_SPIRIT_X3_SEEK_APRIL_13_2014_1920PM)
+#define BOOST_SPIRIT_X3_SEEK_APRIL_13_2014_1920PM
+
+#include <boost/spirit/home/x3/core/parser.hpp>
+
+namespace boost { namespace spirit { namespace x3
+{
+    template<typename Subject>
+    struct seek_directive : unary_parser<Subject, seek_directive<Subject>>
+    {
+        typedef unary_parser<Subject, seek_directive<Subject>> base_type;
+        static bool const is_pass_through_unary = true;
+        static bool const handles_container = Subject::handles_container;
+
+        constexpr seek_directive(Subject const& subject) :
+            base_type(subject) {}
+
+        template<typename Iterator, typename Context
+          , typename RContext, typename Attribute>
+        bool parse(
+            Iterator& first, Iterator const& last
+          , Context const& context, RContext& rcontext, Attribute& attr) const
+        {
+            for (Iterator current(first);; ++current)
+            {
+                if (this->subject.parse(current, last, context, rcontext, attr))
+                {
+                    first = current;
+                    return true;
+                }
+
+                // fail only after subject fails & no input
+                if (current == last)
+                    return false;
+            }
+        }
+    };
+
+    struct seek_gen
+    {
+        template<typename Subject>
+        constexpr seek_directive<typename extension::as_parser<Subject>::value_type>
+        operator[](Subject const& subject) const
+        {
+            return { as_parser(subject) };
+        }
+    };
+
+    constexpr auto seek = seek_gen{};
+}}}
+
+#endif