Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
14352 changed files with 3176737 additions and 0 deletions
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+/*=============================================================================
+    Copyright (c) 2003 Joel de Guzman
+    http://spirit.sourceforge.net/
+
+  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_SAFE_BOOL_HPP)
+#define BOOST_SPIRIT_SAFE_BOOL_HPP
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/spirit/home/classic/namespace.hpp>
+
+namespace boost { namespace spirit {
+
+BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
+
+    namespace impl
+    {
+        template <typename T>
+        struct no_base {};
+
+        template <typename T>
+        struct safe_bool_impl
+        {
+#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
+            void stub(T*) {};
+            typedef void (safe_bool_impl::*type)(T*);
+#else
+            typedef T* TP; // workaround to make parsing easier
+            TP stub;
+            typedef TP safe_bool_impl::*type;
+#endif
+        };
+    }
+
+    template <typename DerivedT, typename BaseT = impl::no_base<DerivedT> >
+    struct safe_bool : BaseT
+    {
+    private:
+        typedef impl::safe_bool_impl<DerivedT> impl_t;
+        typedef typename impl_t::type bool_type;
+
+    public:
+        operator bool_type() const
+        {
+            return static_cast<const DerivedT*>(this)->operator_bool() ?
+                &impl_t::stub : 0;
+        }
+
+        operator bool_type()
+        {
+            return static_cast<DerivedT*>(this)->operator_bool() ?
+                &impl_t::stub : 0;
+        }
+    };
+
+BOOST_SPIRIT_CLASSIC_NAMESPACE_END
+
+}}
+
+#endif
+