Closed Bug 541587 Opened 15 years ago Closed 15 years ago

make it possible to spawn a task that returns non-nil

Categories

(Servo Graveyard :: Rust, defect)

Product:
Servo Graveyard
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

(Not tracked)

Status:
RESOLVED FIXED

People

(Reporter: graydon, Unassigned)

Details

Currently only fn foo(a,b,c)->() can be spawned; the output slot in the spawnee is not wired up properly and we have no way to read the return value of a properly-exited proc. We might as well support reading values out, it's a convenient pattern for cases where you don't want to rewrite the callee to shuffle its (singular) output through a channel.
On second thought, this is kinda weird since you have nothing to return on failure; it'd require transforming the return type to an option type or something. Maybe this is pointless or too complex to bother with? It's pretty easy to just prohibit.
Summary: make it possible to spawn a proc that returns non-nil → make it possible to spawn a task that returns non-nil
Yeah, this is a bad plan. Let's prohibit fully. Added testcase to require it in 84dbe5fbdfc5. Closing this bug.
Status: NEW → RESOLVED
Closed: 15 years ago
Resolution: --- → FIXED
Group: servo
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