Function run_test04

exprtk_test.cpp:3266–3320

template <typename T>
bool run_test04()
{
   const std::string expression_string = "clamp(-1.0,sin(2 * pi * x) + cos(y / 2 * pi),+1.0)";

   exprtk::symbol_table<T> symbol_table;
   exprtk::expression<T> expression;

   T x = T(-1000);
   T y = T(-1000);

   symbol_table.add_variable("x",x);
   symbol_table.add_variable("y",y);
   symbol_table.add_constants();

   expression.register_symbol_table(symbol_table);

   {
      exprtk::parser<T> parser;

      if (!parser.compile(expression_string,expression))
      {
         printf("run_test04() - Error: %s   Expression: %s\n",
                parser.error().c_str(),
                expression_string.c_str());

         return false;
      }
   }

   const T pi = T(3.141592653589793238462643383279502);
   const T increment = T(0.0001);

   while ((x <= T(+1000)) && (y <= T(+1000)))
   {
      T result1 = expression.value();
      T result2 = clamp<T>(-1.0,std::sin(2 * pi * x) + std::cos(y / 2 * pi),+1.0);

      if (not_equal(result1,result2))
      {
         printf("run_test04() - Computation Error:  Expression: [%s]\tExpected: %19.15f\tResult: %19.15f x:%19.15f\ty:%19.15f\n",
                expression_string.c_str(),
                static_cast<double>(result1),
                static_cast<double>(result2),
                static_cast<double>(x),
                static_cast<double>(y));

         return false;
      }

      x += increment;
      y += increment;
   }

   return true;
}

template <typename T>
bool run_test05()