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Fnbool_to_FnOptionT

This commit is contained in:
Rob Walker 2019-03-01 13:40:48 -08:00 committed by Grimes
parent e30e4cc603
commit a7c18cc0b4
1 changed files with 18 additions and 15 deletions
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33
runtime/src/bank.rs
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@ -767,20 +767,14 @@ impl Bank {
(self.slot + self.stakers_slot_offset) / self.slots_per_epoch
}
pub fn epoch_vote_states<F>(&self, epoch: u64, cond: F) -> Option<HashMap<Pubkey, VoteState>>
pub fn epoch_vote_states<F, T>(&self, epoch: u64, check: F) -> Option<HashMap<Pubkey, T>>
where
F: Fn(&Pubkey, &VoteState) -> bool,
F: Fn(&Pubkey, &VoteState) -> Option<(Pubkey, T)>,
{
self.epoch_vote_states.get(&epoch).map(|vote_states| {
vote_states
.iter()
.filter_map(|(p, vote_state)| {
if cond(p, vote_state) {
Some((*p, vote_state.clone()))
} else {
None
}
})
.filter_map(|(p, vote_state)| check(p, vote_state))
.collect()
})
}
@ -1488,13 +1482,22 @@ mod tests {
let parent = Arc::new(Bank::new(&genesis_block));
let vote_states0 =
parent.epoch_vote_states(0, |_, vote_state| vote_state.delegate_id == leader_id);
let vote_states0 = parent.epoch_vote_states(0, |pubkey, vote_state| {
if vote_state.delegate_id == leader_id {
Some((*pubkey, true))
} else {
None
}
});
assert!(vote_states0.is_some());
assert!(vote_states0.iter().len() != 0);
assert!(parent.epoch_vote_states(1, |_, _| true).is_some());
assert!(parent.epoch_vote_states(2, |_, _| true).is_some());
fn all(key: &Pubkey, _vote_state: &VoteState) -> Option<(Pubkey, Option<()>)> {
Some((*key, None))
}
assert!(parent.epoch_vote_states(1, all).is_some());
assert!(parent.epoch_vote_states(2, all).is_some());
// child crosses epoch boundary and is the first slot in the epoch
let child = Bank::new_from_parent_and_id(
@ -1502,7 +1505,7 @@ mod tests {
leader_id,
SLOTS_PER_EPOCH - (STAKERS_SLOT_OFFSET % SLOTS_PER_EPOCH),
);
assert!(child.epoch_vote_states(3, |_, _| true).is_some());
assert!(child.epoch_vote_states(3, all).is_some());
// child crosses epoch boundary but isn't the first slot in the epoch
let child = Bank::new_from_parent_and_id(
@ -1510,7 +1513,7 @@ mod tests {
leader_id,
SLOTS_PER_EPOCH - (STAKERS_SLOT_OFFSET % SLOTS_PER_EPOCH) + 1,
);
assert!(child.epoch_vote_states(3, |_, _| true).is_some());
assert!(child.epoch_vote_states(3, all).is_some());
}
}