How can 2 double ports value be equal?

[linxigjs]

BehaviorTree.CPP/include/behaviortree_cpp_v3/decorators/blackboard_precondition.h

Line 73 in d7e861f

value_B == value_A )

Hi, i noticed that BlackboardPreconditionNode's port value maybe int, double, or string.
In tick(), the value from 2 input ports are compared by "==".
But how can 2 double variables be compared by "=="?
Should it be replaced by a selfdefined equal()?

[facontidavide]

it should

[facontidavide]

Change applied. Thanks for pointing this out:

if( getInput("value_A", value_A) &&
    getInput("value_B", value_B) )
{
        bool is_equal = (value_B == value_A);
        if ( std::is_same<double, T>::value || std::is_same<float, T>::value )
        {
            is_equal = std::abs(value_B - value_A) <= std::numeric_limits<float>::epsilon();
        }
        if(is_equal)
        {
            return child_node_->executeTick();
        }
}