// ==========================================================================
//                 SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2024, Knut Reinert, FU Berlin
// All rights reserved.
//
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//
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// ==========================================================================
// Author: Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de>
// ==========================================================================
// Demo for the Switch metaprogramming statement.
// ==========================================================================

#include <iostream>
#include <seqan/basic.h>

using namespace seqan2;

//![switch demo]
int switchTest(Nothing const &)
{
    return -1;
}

int switchTest(False const &)
{
    return 0;
}

int switchTest(True const &)
{
    return 1;
}

int switchTest(NilCase const &)
{
    return 2;
}

template <int X>
struct SwitchTest
{
    typedef typename Switch<
        X,
        Case<-1, Nothing,
             Case<0, False,
                  Case<1, 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]
