comparison operators parameter

[Philipp Kraus]

Hello,

I' writing a class with a method, that should get a parameter for
comparision like <, <=, > or >=. The method must compare some float
values but the user of the method should be set the comparision. My
first idea is to use an enum with 4 states of comparision, but is there
a better solution?

In pseudocode:

myclass::mymethod( comparision_operator p_comp ) {
float a,b;
if ( p_comp(a,b))
do something
}

Thx

Phil

 

[Öö Tiib]

Hello,

I' writing a class with a method, that should get a parameter for
comparision like <, <=, > or >=. The method must compare some float
values but the user of the method should be set the comparision. My
first idea is to use an enum with 4 states of comparision, but is there
a better solution?

In pseudocode:

myclass::mymethod( comparision_operator p_comp ) {
    float a,b;
    if ( p_comp(a,b))
       do something

}

Usually function objects are used there in C++. Objects of class that
overloads 'bool operator()(float,float) const'.