nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2025-05-14 02:49:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add assertion for len of vecs

Browse Source
This commit is contained in:
Simon Vandel Sillesen 2020-09-19 23:22:54 +02:00
parent 738ed9b5ec
commit a875c7a1ea
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
compiler/rustc_mir/src/transform/simplify_try.rs
View File

@ -568,14 +568,15 @@ impl<'a, 'tcx> SimplifyBranchSameOptimizationFinder<'a, 'tcx> {
.basic_blocks()
.iter_enumerated()
.filter_map(|(bb_idx, bb)| {
let (discr_switched_on, targets_and_values):(_, Vec<_>) = match &bb.terminator().kind {
let (discr_switched_on, targets_and_values) = match &bb.terminator().kind {
TerminatorKind::SwitchInt { targets, discr, values, .. } => {
// if values.len() == targets.len() - 1, we need to include None where no value is present
// such that the zip does not throw away targets. If no `otherwise` case is in targets, the zip will simply throw away the added None
let values_extended = values.iter().map(|x|Some(*x)).chain(once(None));
let targets_and_values = targets.iter().zip(values_extended)
.map(|(target, value)| SwitchTargetAndValue{target:*target, value:value})
let targets_and_values:Vec<_> = targets.iter().zip(values_extended)
.map(|(target, value)| SwitchTargetAndValue{target:*target, value})
.collect();
assert_eq!(targets.len(), targets_and_values.len());
(discr, targets_and_values)},
_ => return None,
};