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From: Hendrik Schober on 28 Apr 2008 04:20
Jim Johnson <aopiyy001(a)yahoo.com> wrote:
> The following line is illegal?
> std::string line = NULL;
> // for a value I cannot set to null as it's not an address

Yes. It initializes a 'std::string' with the 'NULL' pointer.
While the 'NULL' pointer is a valid 'const char*', and you
can initialize 'std::string' with 'const char*', you must
not initialize 'std::string' with 'NULL', as its constructor
doesn't check for 'NULL'.
If you want an empty string, just write
std::string line;

> Then I should write like following?
> std::string * line = NULL; // a pointer I can set to null pointer

This is something completly different. It creates a pointer
that points to address 'NULL'.

Schobi

(F'up)

--
SpamTrap(a)gmx.de is never read
I'm HSchober at gmx dot de
"I guess at some point idealism meets human nature and
explodes." Daniel Orner


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