David Given wrote:
Therefore, casting (double)0xFFFFFFFF to an unsigned int is
valid, but it's
*not* valid to cast it to an int. Casting it to an unsigned
int and *then* to an int is valid, and will result in 0xFFFFFFF.
Anything else invoces undefined behaviour, and results in
daemons flying out of your nose.
lua_Integer is a typedef for ptrdiff_t, which must be signed. So for
safe extraction of unsigned integers in stock Lua there may be a need
for a lua_UnsignedInteger typedef, and a lua_tounsignedinteger
function.
Maybe lua_Unsigned and lua_tounsigned would be clear enough.
