Question

How can I compare function pointers in C++? Is it stable?

For example, would something like this be valid:

if(pFnc == &myFnc){
//Do something
}

Answer 1

C++03 5.10/1 [expr.eq]:

The == (equal to) and the != (not equal to) operators have the same
semantic restrictions, conversions, and result type as the relational
operators except for their lower precedence and truth-value result.
[Note: a < b
== c < d is true whenever a < b and c < d have the same truth-value. ] Pointers to objects or functions of the same type (after pointer conversions) can be compared for equality. Two pointers of the same
type compare equal if and only if they are both null, both point to
the same function, or both represent the same address (3.9.2).

Emphasis mine.