RE: [Dev-C++] #DEFINE versus cont variables in array inicializations

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

> -----Original Message-----
> From: Per Westermark [mailto:pw...@ia...] 
> Sent: Saturday, May 31, 2003 12:19 AM
> To: Ioannis Vranos
> Cc: Dev-C++ Mailing List
> Subject: RE: [Dev-C++] #DEFINE versus cont variables in array 
> inicializations
> 
> 
> At least for scalar data types, it doesn't matter if a global const xx
> variable is used in other modules.


Why? Imagine in another unit:


extern const int SIZE;

void f()
{
  cout<<&SIZE;
}



> Since the compiler inlines the value of the const variable 
> everytime it is
> used, there is no need to keep a global reference for use by 
> other source
> files.


What if we use its address in another unit? What about this:

#include <cstring>

extern const int SIZE;

// in a function ...

using std::memcpy;

// ...

int *p=new int;

memcpy(p, &SIZE, sizeof(*p));




Ioannis Vranos
 
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