tree ab0946646337175dab2e4ad58e4c633ff8582da0
parent c651ed9fd589571a2e3b11bb94db7e0b968d4ae0
author Jeff Brown <jeffbrown@google.com> 1542860415 -0800
committer Jeff Brown <jeffbrown@google.com> 1544678094 -0800

[fit][scope] Add a mechanism for scoping promises.

fit::scope is a mechanism for wrapping promises such that they will
automatically be abandoned if the scope is exited before they complete.
Can be very useful when handing out promises that capture references
to "this" or to local variables.

Test: fit-test
Change-Id: I31a37d67e745156d3ee255fa1ed1060379d32bab