Re: mutable vs const_cast, which is better to modify field from const
function?
On 2011-7-9 15:20, Narinder wrote:
struct MyObject{};
struct SomeClass
{
SomeClass():myObject(0){}
const MyObject * getMyObject()const
{
return getMyObject_impl();
}
MyObject * getMyObject()
{
return getMyObject_impl();
}
private:
const MyObject * getMyObject_impl()const
{
if(!myObject)
{
myObject = new MyObject();
}
return myObject;
}
MyObject * getMyObject_impl()
{
if(!myObject)
{
myObject = new MyObject();
}
return myObject;
}
mutable MyObject * myObject;
};
-------------------------------------------------
So as long as all your other member functions access myObject via the
getMyObject_impl methods it should be ok.
First, sorry that I forgot the "const" in the return of the getter.
I did mean const MyObject * getMyObject()const.
Back to my question, seems you are suggesting to use "mutable", right?
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