Re:Will It Optimize?
by dchest on Friday September 16, 2011 @11:03AM
(#3004706)
Why does it have undefined behavior? Switch statement with no match and without the default case has defined behavior: the switch statement does nothing.
[ Parent
| on HN ]
"If no converted case constant expression matches and there is no default label, no part of the switch body is executed."
Section 6.8.4.2, item 5 of http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf (page 134)
how is this different from "does nothing"?
... it's not? I was just providing an authoritative reference for the parent's claim.
(Pedantic note: It's technically incorrect to say that the switch statement does nothing.
switch(FunctionThatDoesSomethingAndReturns1()) {
case 2:
// foo
}