我必須在一些庫中工作,無論我做什麼,我都會不斷收到以下錯誤代碼。錯誤將`const`作爲'const`的`this`參數丟棄限定符
傳遞`常量::的Amko問題::發射 '爲' this'argument的 'const的雙::的Amko問題::啓動::比率(雙,雙)' 丟棄限定符
namespace amko { namespace problem {
launch::launch():base(0.0, 20.0, 1) {}
base_ptr launch::clone() const
{
return base_ptr(new launch(*this));
}
const double launch::ratio(const double a, const double b)
{
const double area = a*b;
const double circumference = 2*a+2*b;
const double ratio = circumference/area;
return ratio;
}
void launch::objfun_impl(fitness_vector &f, const decision_vector &xv) const
{
amko_assert(f.size() == 1 && xv.size() == get_dimension());
const double x = xv[0];
const double y = launch::ratio(x,5);
f[0] = y;
}
而以下代碼工作得很好。
namespace amko { namespace problem {
initialValueProblem::initialValueProblem():base(0.0, 20.0, 1) {}
base_ptr initialValueProblem::clone() const
{
return base_ptr(new initialValueProblem(*this));
}
Eigen::VectorXd initialValueProblem::computeDerivative(const double time, const Eigen::VectorXd& state)
{
Eigen::VectorXd stateDerivative(1);
stateDerivative(0) = state(0) - std::pow(time, 2.0) + 1.0;
return stateDerivative;
}
void initialValueProblem::objfun_impl(fitness_vector &f, const decision_vector &xv) const
{
amko_assert(f.size() == 1 && xv.size() == get_dimension());
const double x = xv[0];
double intervalStart = 0.0;
double intervalEnd = 10.0;
double stepSize = 0.1;
Eigen::VectorXd initialState_;
initialState_.setZero(1);
initialState_(0) = x;
numerical_integrators::EulerIntegratorXd integrator(boost::bind(&initialValueProblem::computeDerivative,
const_cast<initialValueProblem*>(this), _1, _2), intervalStart, initialState_);
Eigen::VectorXd finalState = integrator.integrateTo(intervalEnd, stepSize);
f[0] = fabs(finalState(0) - 11009.9937484598);
}
謝謝!
請將您的代碼減少到**最小**測試用例。 – 2012-03-16 17:59:11
這種「常見問題」問題每天發佈**。來吧! – mfontanini 2012-03-16 18:14:23
@fontanini:隨意留下一個舊的問題的鏈接,我們將把它作爲一個副本來關閉。 – 2012-03-16 18:17:29