Re: C++ std::string tries to free() a not allocated pointer ?
Re: C++ std::string tries to free() a not allocated pointer ?
- Subject: Re: C++ std::string tries to free() a not allocated pointer ?
- From: David Rowland <email@hidden>
- Date: Thu, 19 Nov 2009 07:48:59 -0800
On Nov 19, 2009, at 7:41 AM, Howard Moon wrote:
On Nov 19, 2009, at 7:26 AM, Paul Sanders wrote:
What does your destructor do? Your copy constructors / assignment
operators
appear to copy the pointer, rather than making a copy of the data
pointed
to, so perhaps you end up freeing the pointer twice (once for each
SQLString
object destroyed).
That would be true if realStr were a char*. But it's defined as a
std::string, so its assignment operator is used, which would perform
the string copy properly.
A rule of thumb with C++ is that the assignment operator, copy
constructor and destructor tend to come as a package. If you need one,
you often need all three.
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