g++ and null pointers

[Eljay Love-Jensen]

Hi everyone,

GCC 3.3.1 on Cygwin

When I compile this test.cpp source...

// g++ -Wno-long-long -pedantic -Wall -W -c test.cpp
#define NULL __null
int main()
{
     void* p;
     p = 0;
     p = 0u;
     p = 0ul;
     p = 0ull;
     p = 0l;
     p = 0ll;
     p = false;
     // silly...
     p = -0;
     p = -0u;
     p = -0ul;
     p = -0ull;
     p = -0l;
     p = -0ll;
     p = -false;
     // my druthers...
     p = NULL;
     return 0;
}

...GCC is happy with all of these assignments.

Are they all supposed (ISO 14882) to be legit?  Some of them surprised me.

The negated ones are just for fun.  I didn't go completely crazy with the 
cheese whiz, and put in "!!0" and "+0" and hexadecimal, and octal, and 
various permutations of the [uUlL]* suffix.

Sincerely,
--Eljay