clean up lifetime constraints

Author: jstarry

vote/src/vote_state_view/field_frames.rs

@@ -5,8 +5,8 @@ use {
     std::io::BufRead,
 };
 
-pub(super) trait ListFrame<'frame> {
-    type Item: 'frame;
+pub(super) trait ListFrame {
+    type Item;
 
     fn len(&self) -> usize;
     fn item_size(&self) -> usize {
@@ -28,7 +28,7 @@ pub(super) enum VotesFrame {
     Landed(LandedVotesListFrame),
 }
 
-impl ListFrame<'_> for VotesFrame {
+impl ListFrame for VotesFrame {
     type Item = LockoutItem;
 
     fn len(&self) -> usize {
@@ -87,7 +87,7 @@ impl LockoutListFrame {
     }
 }
 
-impl ListFrame<'_> for LockoutListFrame {
+impl ListFrame for LockoutListFrame {
     type Item = LockoutItem;
 
     fn len(&self) -> usize {
@@ -119,7 +119,7 @@ pub(super) struct LandedVoteItem {
     confirmation_count: [u8; 4],
 }
 
-impl ListFrame<'_> for LandedVotesListFrame {
+impl ListFrame for LandedVotesListFrame {
     type Item = LockoutItem;
 
     fn len(&self) -> usize {
@@ -158,7 +158,7 @@ pub(super) struct AuthorizedVoterItem {
     voter: Pubkey,
 }
 
-impl ListFrame<'_> for AuthorizedVotersListFrame {
+impl ListFrame for AuthorizedVotersListFrame {
     type Item = AuthorizedVoterItem;
 
     fn len(&self) -> usize {
@@ -203,7 +203,7 @@ impl EpochCreditsListFrame {
     }
 }
 
-impl ListFrame<'_> for EpochCreditsListFrame {
+impl ListFrame for EpochCreditsListFrame {
     type Item = EpochCreditsItem;
 
     fn len(&self) -> usize {
@@ -288,7 +288,7 @@ impl RootSlotFrame {
 
 pub(super) struct PriorVotersFrame;
 
-impl ListFrame<'_> for PriorVotersFrame {
+impl ListFrame for PriorVotersFrame {
     type Item = PriorVotersItem;
 
     fn len(&self) -> usize {

vote/src/vote_state_view/list_view.rs

@@ -5,7 +5,7 @@ pub(super) struct ListView<'a, F> {
     item_buffer: &'a [u8],
 }
 
-impl<'a, F: ListFrame<'a>> ListView<'a, F> {
+impl<'a, F: ListFrame> ListView<'a, F> {
     pub(super) fn new(frame: F, buffer: &'a [u8]) -> Self {
         let len_offset = core::mem::size_of::<u64>();
         let item_buffer = &buffer[len_offset..];
@@ -53,7 +53,10 @@ pub(super) struct ListViewIter<'a, F> {
     view: ListView<'a, F>,
 }
 
-impl<'a, F: ListFrame<'a>> Iterator for ListViewIter<'a, F> {
+impl<'a, F: ListFrame> Iterator for ListViewIter<'a, F>
+where
+    F::Item: 'a,
+{
     type Item = &'a F::Item;
     fn next(&mut self) -> Option<Self::Item> {
         if self.index < self.view.len() {
@@ -66,7 +69,10 @@ impl<'a, F: ListFrame<'a>> Iterator for ListViewIter<'a, F> {
     }
 }
 
-impl<'a, F: ListFrame<'a>> DoubleEndedIterator for ListViewIter<'a, F> {
+impl<'a, F: ListFrame> DoubleEndedIterator for ListViewIter<'a, F>
+where
+    F::Item: 'a,
+{
     fn next_back(&mut self) -> Option<Self::Item> {
         if self.rev_index < self.view.len() {
             let item = self.view.item(self.view.len() - self.rev_index - 1);