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\constant\ Member Functions

General and Gameplay Programming Programming

Started by Clash Rocker April 17, 2001 08:39 AM

2 comments, last by Clash Rocker 23 years, 9 months ago

Clash Rocker

Author

130

April 17, 2001 08:39 AM

I once saw a C++ Class declaration like so: ...the following is only what I really can remember.

    
class CFoo
{
public:
    void whatever(bool something) const;
};

Now I don't think I know what that const is for on the end of that function prototype. Does it mean that this function (whatever()) does not change the class member variables? Edited by - Clash Rocker on April 17, 2001 9:41:17 AM

NuffSaid

122

April 17, 2001 10:02 AM

Yep. That means that the function doesn''t change the class''s member variables. Putting the const at the end of the function may enable the compiler to perform some sort of optimization.

==========================================In a team, you either lead, follow or GET OUT OF THE WAY.

Conner McCloud

1,135

April 17, 2001 11:23 AM

I may be wrong, but as I recal there are situations in which an instance of a class can''t be modified. In this case, only functions declared as const can be called without the compiler yelling at you.

DZ