Re: History of - if(p) delete p; - ... ?
That was never necessary.
"Martin T." <0xCDCDCDCD@gmx.at> wrote in message
news:glki9q$438$1@news.motzarella.org...
Hi all.
As things are the following works just fine under Visual Studio:
int* p=NULL;
free(p); // If memblock is NULL, the pointer is ignored and free
immediately returns.
delete p; // The default behavior for a null value of _Ptr is to do
nothing.
delete[] p; // The default behavior for a null value of _Ptr is to do
nothing.
p = NULL;
However, our code base uses the following construct basically all the
time:
int* p = ...
if(p)
free(p); // or delete, or delete[]
p = NULL;
I think the code was initially created on Visual Studio 4 and then got
ported over the years to 5/6/now 2005 ...
I'm trying to figure out why we always used this construct even though
it's not necessary.
Was it *ever* necessary? Pre VC6, pre VC5, ... ?? Has the free function in
C always been specified as noop in case of NULL ?
cheers,
Martin
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