text: // ==========================================================================
  //                 SeqAn - The Library for Sequence Analysis
  // ==========================================================================
  // Copyright (c) 2006-2013, Knut Reinert, FU Berlin
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above copyright
  //       notice, this list of conditions and the following disclaimer in the
  //       documentation and/or other materials provided with the distribution.
  //     * Neither the name of Knut Reinert or the FU Berlin nor the names of
  //       its contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED. IN NO EVENT SHALL KNUT REINERT OR THE FU BERLIN BE LIABLE
  // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  // DAMAGE.
  //
  // ==========================================================================
  // Author: Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de>
  // ==========================================================================
  // Demo for the Switch metaprogramming statement.
  // ==========================================================================
  
  #include <iostream>
  #include <seqan/basic.h>
  
  //![switch demo]
  int switchTest(seqan::Nothing const &)
  {
      return -1;
  }
  
  int switchTest(seqan::False const &)
  {
      return 0;
  }
  
  int switchTest(seqan::True const &)
  {
      return 1;
  }
  
  int switchTest(seqan::NilCase const &)
  {
      return 2;
  }
  
  template <int X>
  struct SwitchTest
  {
      typedef typename seqan::Switch<
          X,
          seqan::Case<-1, seqan::Nothing,
          seqan::Case<0, seqan::False,
          seqan::Case<1, seqan::True
          > > > >::Type Type;
  };
  
  int main()
  {
      typedef SwitchTest<-1>::Type T1;
      typedef SwitchTest< 0>::Type T2;
      typedef SwitchTest< 1>::Type T3;
      typedef SwitchTest< 2>::Type T4;
  
      std::cout << switchTest(T1()) << "\n"   // => "-1"
                << switchTest(T2()) << "\n"   // => "0"
                << switchTest(T3()) << "\n"   // => "1"
                << switchTest(T4()) << "\n";  // => "2"
  
      return 0;
  }
  //![switch demo]
  