RE: [Dev-C++] STL Map question

[Ioannis V. <iv...@em...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Per Westermark
> Sent: Tuesday, July 15, 2003 2:47 AM
> To: Shane Bryldt
> Cc: Jaap de Wolff; C++
> Subject: Re: [Dev-C++] STL Map question
> 
> 
> In your text you mentioned something about the original code zeroing
> arrays on erase and performing reallocation.
> 
> Just a note about a very important difference between C and 
> C++. In C it
> is always safe to use memset() or ZeroMemory etc to clear a struct


You are in general right with an exception. 0 value is not necessarily in
all types all bits zero (which is the 0 of a char/byte). Also a struct or a
type may have padding bits and 0ing all its bytes calls for trouble.


Regarding C99 I have read in Usenet (but was too bored to check the
standard) that char can have padding bits because they believed that C90
allowed that, while C++ inherited from C90 the fact that a char cannot have
padding bits.


That's funny eh?






Ioannis Vranos
 
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