"Dann Corbit" <[EMAIL PROTECTED]> writes: > From the C-FAQ: > > A: Not portably, it doesn't. It attempts to modify the variable a > twice between sequence points, so its behavior is undefined.
> 10.3: How can I write a generic macro to swap two values? Neither of these are really relevant, a) he's not talking about swapping anyways, and b) there's no reason to try to write the linked list code in a single statement or macro. > but it will not work for floating-point values or pointers Treating pointers as integers is technically nonportable but realistically you would be pretty hard pressed to find any architecture anyone runs postgres on where there isn't some integer datatype that you can cast both directions from pointers safely. Presumably if you wanted to do this you would implement it all in an abstraction that hid all the details from calling code. You could even implement gdb functions to help debugging. But that's a lot of effort for something postgres didn't even need in the first place. -- greg ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
