On 6/7/12 2:20 PM, Gareth Smith wrote:
I think that allowing an early exit with a break/continue from lambdas
that use this special form is confusing, because "breaking" may or
may-not actually resume the code that follows the do-call. The lambda
might be put into a data structure for later execution, or, like in your
spawn example, executed in a new task.
I would prefer that instead of having a special `do` form, all `|| expr`
lambdas could have early returns using `ret`.
If you allow all block lambdas to have early returns with "ret", then this:
fn f() {
for int::range(1, 10) |i| {
ret i;
}
}
Has a very different meaning from:
fn f() {
int::range(1, 10) |i| {
ret i;
}
}
IMHO this is likely to be pretty confusing.
Also, eliminating "do" makes this ambiguous:
spawn() || {
...
}
Is ambiguous with bitwise-or. This is also ambiguous:
spawn || {
...
}
In any case, I think this looks nicer:
do spawn {
...
}
Patrick
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