continue function
Optional trailing block in a while or foreach
Actually a flow control statement rather than a function. If there is a continue
BLOCK attached to a BLOCK (typically in a while or foreach),
it is always executed just before the conditional is about to be evaluated again, just like the third part of a
for loop in C. Thus it can be used to increment a loop variable, even when the
loop has been continued via the next statement (which is similar to the C
continue statement).
last, next, or redo may appear within
a continue block. last and redo will
behave as if they had been executed within the main block. So will next, but since it will
execute a continue block, it may be more entertaining.
while (EXPR) {
### redo always comes here
do_something;
} continue {
### next always comes here
do_something_else;
# then back the top to re-check EXPR
}
### last always comes here
Omitting the continue section is semantically equivalent to using an empty one,
logically enough. In that case, next goes directly back to check the condition at the top
of the loop.
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