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

#ifndef SEQAN_TESTS_BASIC_TEST_BASIC_METAPROGRAMMING_CONTROL_H_
#define SEQAN_TESTS_BASIC_TEST_BASIC_METAPROGRAMMING_CONTROL_H_

SEQAN_DEFINE_TEST(test_basic_metaprogramming_control_if)
{
    using namespace seqan2;

    bool b = IfC<true, False, True>::Type::VALUE;
    SEQAN_ASSERT_EQ(b, false);
    b = IfC<false, False, True>::Type::VALUE;
    SEQAN_ASSERT_EQ(b, true);
}

// Support code for test_basic_metaprogramming_control_switch.

struct Nothing_ {};

int switchTest(Nothing_ const &) { return -1; }
int switchTest(seqan2::False const &) { return 0; }
int switchTest(seqan2::True const &) { return 1; }
int switchTest(seqan2::NilCase const &) { return 2; }

template <int X>
struct SwitchTest
{
    typedef typename seqan2::Switch<
        X,
        seqan2::Case<-1, Nothing_,
        seqan2::Case<0, seqan2::False,
        seqan2::Case<1, seqan2::True
        > > > >::Type Type;
};

SEQAN_DEFINE_TEST(test_basic_metaprogramming_control_switch)
{
    using namespace seqan2;

    typedef typename SwitchTest<-1>::Type T1;
    SEQAN_ASSERT_EQ(switchTest(T1()), -1);

    typedef typename SwitchTest<0>::Type T2;
    SEQAN_ASSERT_EQ(switchTest(T2()), 0);

    typedef typename SwitchTest<1>::Type T3;
    SEQAN_ASSERT_EQ(switchTest(T3()), 1);

    typedef typename SwitchTest<2>::Type T4;
    SEQAN_ASSERT_EQ(switchTest(T4()), 2);
}

// Support code for test_basic_metaprogramming_control_loop.

struct LoopTestWorker_
{
    template <typename TArg>
    static inline void body(TArg & arg, int I)
    {
        arg[I - 1] += I;
    }
};

SEQAN_DEFINE_TEST(test_basic_metaprogramming_control_loop)
{
    using namespace seqan2;

    int i[5] = { 1, 2, 3, 4, 5 };
    Loop<LoopTestWorker_, 5>::run(i);

    SEQAN_ASSERT_EQ(i[0], 2);
    SEQAN_ASSERT_EQ(i[1], 4);
    SEQAN_ASSERT_EQ(i[2], 6);
    SEQAN_ASSERT_EQ(i[3], 8);
    SEQAN_ASSERT_EQ(i[4], 10);
}

SEQAN_DEFINE_TEST(test_basic_metaprogramming_control_loop_reverse)
{
    using namespace seqan2;

    int i[5] = { 1, 2, 3, 4, 5 };
    LoopReverse<LoopTestWorker_, 5>::run(i);

    SEQAN_ASSERT_EQ(i[0], 2);
    SEQAN_ASSERT_EQ(i[1], 4);
    SEQAN_ASSERT_EQ(i[2], 6);
    SEQAN_ASSERT_EQ(i[3], 8);
    SEQAN_ASSERT_EQ(i[4], 10);
}

#endif  // #ifndef SEQAN_TESTS_BASIC_TEST_BASIC_METAPROGRAMMING_CONTROL_H_
