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    • safe_bool.cti
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    1 //
    2 // Copyright (c) 2020 Fraunhofer Institute for Applied Information Technology (FIT)
    3 // Network Research Group (NET)
    4 // Schloss Birlinghoven, 53754 Sankt Augustin, GERMANY
    5 // Contact: support@wiback.org
    6 //
    7 // This file is part of the SENF code tree.
    8 // It is licensed under the 3-clause BSD License (aka New BSD License).
    9 // See LICENSE.txt in the top level directory for details or visit
    10 // https://opensource.org/licenses/BSD-3-Clause
    11 //
    12 
    13 
    14 /** \file
    15  \brief safe_bool inline template implementation */
    16 
    17 //#include "safe_bool.ih"
    18 
    19 // Custom includes
    20 
    21 #define prefix_ inline
    22 //-/////////////////////////////////////////////////////////////////////////////////////////////////
    23 
    24 #ifdef SENF_CXX11_ENABLED
    25 
    26 template <typename T>
    27 prefix_ senf::comparable_safe_bool<T>::operator bool()
    28  const
    29 {
    30  return static_cast<const T*>(this)->boolean_test();
    31 }
    32 
    33 #else
    34 
    35 template <typename T>
    36 prefix_ senf::comparable_safe_bool<T>::operator bool_type()
    37  const
    38 {
    39  return (static_cast<const T*>(this))->boolean_test()
    40 // ? &safe_bool_base::this_type_does_not_support_comparisons : 0;
    41  ? &comparable_safe_bool<T>::this_type_does_not_support_comparisons : 0;
    42 }
    43 
    44 template <typename T>
    45 prefix_ bool senf::comparable_safe_bool<T>::operator!()
    46  const
    47 {
    48  return ! (static_cast<const T*>(this))->boolean_test();
    49 }
    50 
    51 template <typename T>
    52 prefix_ senf::comparable_safe_bool<T>::~comparable_safe_bool()
    53 {}
    54 
    55 template <typename T, typename U>
    56 prefix_ void senf::operator==(const safe_bool<T>& lhs, const safe_bool<U>& rhs)
    57 {
    58  lhs.this_type_does_not_support_comparisons();
    59 }
    60 
    61 template <typename T, typename U>
    62 prefix_ void senf::operator!=(const safe_bool<T>& lhs, const safe_bool<U>& rhs)
    63 {
    64  lhs.this_type_does_not_support_comparisons();
    65 }
    66 
    67 #endif
    68 
    69 //-/////////////////////////////////////////////////////////////////////////////////////////////////
    70 #undef prefix_
    71 
    72 
    73 // Local Variables:
    74 // mode: c++
    75 // fill-column: 100
    76 // c-file-style: "senf"
    77 // indent-tabs-mode: nil
    78 // ispell-local-dictionary: "american"
    79 // compile-command: "scons -u test"
    80 // comment-column: 40
    81 // End: