1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 
  26 #ifndef SHARE_VM_METAPROGRAMMING_ISINTEGRAL_HPP
  27 #define SHARE_VM_METAPROGRAMMING_ISINTEGRAL_HPP
  28 
  29 #include "memory/allocation.hpp"
  30 #include "metaprogramming/integralConstant.hpp"
  31 #include "metaprogramming/isSigned.hpp"
  32 #include "metaprogramming/removeCV.hpp"
  33 #include <limits>
  34 
  35 // This metafunction returns true iff the type T (irrespective of CV qualifiers)
  36 // is an integral type. Note that this is false for enums.
  37 
  38 template<typename T>
  39 struct IsIntegral
  40   : public IntegralConstant<bool, std::numeric_limits<typename RemoveCV<T>::type>::is_integer>
  41 {};
  42 
  43 // This metafunction returns true iff the type T (irrespective of CV qualifiers)
  44 // is a signed integral type. Note that this is false for enums.
  45 
  46 template<typename T>
  47 struct IsSignedIntegral
  48   : public IntegralConstant<bool, IsIntegral<T>::value && IsSigned<T>::value>
  49 {};
  50 
  51 // This metafunction returns true iff the type T (irrespective of CV qualifiers)
  52 // is an unsigned integral type. Note that this is false for enums.
  53 
  54 template<typename T>
  55 struct IsUnsignedIntegral
  56   : public IntegralConstant<bool, IsIntegral<T>::value && !IsSigned<T>::value>
  57 {};
  58 
  59 #endif // SHARE_VM_METAPROGRAMMING_ISINTEGRAL_HPP