this

[Bill Cunningham]

Can anyone explain to me what the <this> pointer does and what it's used
for? I trying to learn in for COM.

Bill





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[Josephine Schafer]

Re: this


"Bill Cunningham" <some@some.ne t> wrote in message
news:3f42f551_7 @corp.newsgroup s.com...[color=blue]
> Can anyone explain to me what the <this> pointer does and what it's used
> for? I trying to learn in for COM.
>[/color]
It is -
1. A pointer accessible only to nonstatic member functions.
2. A pointer which points to the object for which the member function is
called.
3. Passed by the compiler as a hidden argument to a nonstatic member
function.
E.g. obj.foo (5) can be interpreted as foo (&obj, 5)
4. The expression *this is commonly used to return the current object from a
member function.
return *this;
5. Used to guard against self reference in assignment operator member
function.
if (&Object != this) {
// do not execute in cases of self-reference
6. Non modifiable.

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JS