On Mon, 12 Dec 2005, Jonas Maebe wrote:
On 11 dec 2005, at 22:22, Alexandrov Alexandru wrote:
It depends on the specs of "length" :-)
What do you mean with specs?
How it is defined to behave in the documentation (i.e., whether the
documentation says "if you call length with as argument a nil pointer, the
result is defined to be 0", or "the behaviour of length with as argument a
nil pointer is undefined", or simply doesn't mention it at all).
Exactly.
btw i forgot to mention, i tested on winxp.
In Delphi the result is 0, and no error.
Delphi obviously is a lot more tolerant to bad programming than we are... A
pchar which is nil is not an empty string, but an invalid pointer. It's like
assuming that a nil pointer to a longint is the same as a pointer to the
value 0 or so.
I agree with this position.
A Nil pointer is usually a sign of a bad or uninitialized value.
I will try to update the docs with this.
Michael.
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