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erickt/failure-with-task.out

Created October 6, 2012 22:20
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failure-with-task.out
foo.rs:5:56: 5:58 error: copying a noncopyable value
foo.rs:5 let fail_: fn~(~str) -> ! = fn~(x: ~str) -> ! { wr.send(x); fail; };
^~
foo.rs:5:56: 5:58 note: non-copyable value cannot be copied into a ~fn closure
foo.rs:5 let fail_: fn~(~str) -> ! = fn~(x: ~str) -> ! { wr.send(x); fail; };
Raw
failure-with-task.rs
fn try<T: Send>(f: ~fn(~fn(~str) -> !) -> T) -> Result<T, ~str> {
let (wr, rd) = task::stream();
let result: Result<T, ()> = do task::try |move wr| {
let fail_: fn~(~str) -> ! = fn~(x: ~str) -> ! { wr.send(x); fail; };
f(fail_)
};
return match move result {
Ok(move v) => Ok(move v),
Err(_) => match rd.try_recv() {
Some(move s) => Err(move s),
None => Err(~"fail")
}
}
}
fn main() {
let result: Result<int, ~str> = do try |fail_| {
fail_(~"This didn't work at all!");
};
io::println(fmt!("%?", result));
}
Raw
success-with-sharedchan.out
warning: no debug symbols in executable (-arch x86_64)
rust: task failed at 'explicit failure', foo.rs:6
Err(~"This didn\'t work at all!")
Raw
success-with-sharedchan.rs
fn try<T: Send>(f: ~fn(~fn(~str) -> !) -> T) -> Result<T, ~str> {
let (wr, rd) = task::stream();
let wr = pipes::SharedChan(wr);
let result: Result<T, ()> = do task::try {
let wr = wr.clone();
let fail_: fn~(~str) -> ! = fn~(x: ~str) -> ! { wr.send(x); fail; };
f(fail_)
};
return match move result {
Ok(move v) => Ok(move v),
Err(_) => match rd.try_recv() {
Some(move s) => Err(move s),
None => Err(~"fail")
}
}
}
fn main() {
let result: Result<int, ~str> = do try |fail_| {
fail_(~"This didn't work at all!");
};
io::println(fmt!("%?", result));
}
Raw
success-without-task.out
warning: no debug symbols in executable (-arch x86_64)
rust: task failed at 'explicit failure', foo.rs:6
Err(~"This didn\'t work at all!")
Raw
success-without-task.rs
fn try<T: Send>(f: ~fn(~fn(~str) -> !) -> T) -> Result<T, ~str> {
let (wr, rd) = task::stream();
let fail_: fn~(~str) -> ! = fn~(x: ~str) -> ! { wr.send(x); fail; };
f(fail_);
fail
}
fn main() {
let result: Result<int, ~str> = do try |fail_| {
fail_(~"This didn't work at all!");
};
io::println(fmt!("%?", result));
}
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