etl/test/test_closure_constexpr.cpp

/******************************************************************************
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Embedded Template Library.
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#include "unit_test_framework.h"

#include "etl/closure.h"

#if ETL_USING_CPP14 && !defined(ETL_CLOSURE_FORCE_CPP03_IMPLEMENTATION)

namespace
{
  SUITE(test_closure)
  {
    static constexpr int f1(int a1)
    {
      return a1 * 3;
    }

    static constexpr int f1_ref(const int& a1)
    {
      return a1 * 3;
    }

    static constexpr int f2(int a1, int a2)
    {
      return a1 * 3 + a2;
    }

    static constexpr int f3(int a1, int a2, int a3)
    {
      return a1 * 3 + a2 * a3;
    }

    static constexpr int f4(int a1, int a2, int a3, int a4)
    {
      return a1 * 3 + a2 * a3 + a4;
    }

    static constexpr int f5(int a1, int a2, int a3, int a4, int a5)
    {
      return a1 * 3 + a2 * a3 + a4 * a5;
    }

    static constexpr etl::delegate<int(int)> df1                     = etl::delegate<int(int)>::create<&f1>();
    static constexpr etl::delegate<int(int, int)> df2                = etl::delegate<int(int, int)>::create<&f2>();
    static constexpr etl::delegate<int(int, int, int)> df3           = etl::delegate<int(int, int, int)>::create<&f3>();
    static constexpr etl::delegate<int(int, int, int, int)> df4      = etl::delegate<int(int, int, int, int)>::create<&f4>();
    static constexpr etl::delegate<int(int, int, int, int, int)> df5 = etl::delegate<int(int, int, int, int, int)>::create<&f5>();

    static constexpr etl::delegate<int(const int&)> df1_ref = etl::delegate<int(const int&)>::create<&f1_ref>();

    //*************************************************************************
    constexpr etl::closure<int(int, int)> make_closure_2_args_bind(const etl::delegate<int(int, int)>& f, int arg0, int arg1)
    {
      etl::closure<int(int, int)> c(f, arg0, arg1);
      
      c.bind<0>(7);
      c.bind<1>(8);

      return c;
    }

    //*************************************************************************
    constexpr etl::closure<int(int, int)> make_closure_2_args_bind_all(const etl::delegate<int(int, int)>& f, int arg0, int arg1)
    {
      etl::closure<int(int, int)> c(f, arg0, arg1);
      
      c.bind(7, 8);

      return c;
    }

    //*************************************************************************
    TEST(test_1_arg)
    {
      static constexpr etl::closure<int(int)> c1(df1, 4);
      static constexpr int result = c1();
      CHECK_EQUAL(12, result);
    }

    //*************************************************************************
    TEST(test_1_arg_reference)
    {
      static constexpr int v1 = 4;
      static constexpr etl::closure<int(const int&)> c1_ref(df1_ref, v1);
      CHECK_EQUAL(12, c1_ref());
    }

    //*************************************************************************
    TEST(test_2_args)
    {
      static constexpr etl::closure<int(int, int)> c2(df2, 4, 3);
      static constexpr int result = c2();
      CHECK_EQUAL(15, result);
    }

    //*************************************************************************
    TEST(test_2_args_bind)
    {
      static constexpr etl::closure<int(int, int)> c2 = make_closure_2_args_bind(df2, 4, 3);
      static constexpr int result = c2();
      CHECK_EQUAL(29, result);
    }

    //*************************************************************************
    TEST(test_2_args_bind_all)
    {
      static constexpr etl::closure<int(int, int)> c2 = make_closure_2_args_bind_all(df2, 4, 3);
      static constexpr int result = c2();
      CHECK_EQUAL(29, result);
    }

    //*************************************************************************
    TEST(test_3_args)
    {
      static constexpr etl::closure<int(int, int, int)> c3(df3, 4, 3, 2);
      static constexpr int result = c3();
      CHECK_EQUAL(18, result);
    }

    //*************************************************************************
    TEST(test_4_args)
    {
      static constexpr etl::closure<int(int, int, int, int)> c4(df4, 4, 3, 2, 1);
      static constexpr int result = c4();
      CHECK_EQUAL(19, result);
    }

    //*************************************************************************
    TEST(test_5_args)
    {
      static constexpr etl::closure<int(int, int, int, int, int)> c5(df5, 4, 3, 2, 1, 5);
      static constexpr int result = c5();
      CHECK_EQUAL(23, result);
    }
  };
}

#endif