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externals/cpp-jwt/include/jwt/assertions.hpp

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+/*
+Copyright (c) 2017 Arun Muralidharan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+ */
+
+#ifndef CPP_JWT_ASSERTIONS_HPP
+#define CPP_JWT_ASSERTIONS_HPP
+
+#include <cassert>
+
+namespace jwt {
+
+#if defined(__clang__)
+#  define JWT_NOT_REACHED_MARKER() __builtin_unreachable()
+#elif defined(__GNUC__)
+#  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+#    define JWT_NOT_REACHED_MARKER() __builtin_unreachable()
+#  endif
+#elif defined(_MSC_VER)
+#  define JWT_NOT_REACHED_MARKER() __assume(0)
+#endif
+
+#if defined(DEBUG)
+#  define JWT_NOT_REACHED(reason)  do { \
+                                     assert (0 && reason); \
+                                     JWT_NOT_REACHED_MARKER();        \
+                                   } while (0)
+#else
+#  define JWT_NOT_REACHED(reason)  JWT_NOT_REACHED_MARKER()
+#endif
+
+} // END namespace jwt
+
+#endif