Use of expression values in C

[M.RINDSBERG]

> I must agree with Henry Spencer that readability is not a Boolean type (I doubt
> it's even an ordered type!). However, the question of embedded assignment is 
> not entirely onesided. For some time, I have been using a construct which I
> call a ``guarded command'' (and is indeed something vaguely like Dijkstra's
> guarded commands):
> 
>       if ((fp = fopen(...) != NULL) {
                            ^
			    |--------- Missing close paren.

This one sure is guarded, it wont even compile (>:) .

>          ... Do something; fp does indeed have a value ...
>       }
> 
> The idea is that the if-statement protects the statements of the block. I 
> find this an extremely readable way of stating constraints about the validity
> of variables over sequences of code.

					mark
					..!hou2h!mr