/** Create a new constraint of the form \f$e = 0\f$.
* \param e The expression
* \param s The constraint's strength
* \param weight The constraint's weight */
linear_equation(linear_expression e = linear_expression(0.0),
const strength& s = strength::required(),
double weight = 1.0)
: linear_constraint(std::move(e), s, weight)
{ }
inline linear_equation
operator== (const variable& lhs, const variable& rhs)
{
return linear_expression(lhs) -= rhs;
}
inline linear_equation
operator== (const variable& lhs, double rhs)
{
return linear_expression(lhs, 1, -rhs);
}
EXPORT void* expression_equals_double(void* e1, double v) {
linear_expression le1 = *reinterpret_cast<linear_expression*>(e1);
linear_expression le2 = linear_expression(v);
constraint* c = new constraint(linear_equation(le1, le2));
return reinterpret_cast<void*>(c);
}
