mathieu/os-rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 1

Refactor match + if

Browse source
This commit is contained in:
hyd-dev 2021-05-22 04:14:35 +08:00
parent da0abad492
commit 835405199a
No known key found for this signature in database
GPG key ID: 74FA7FD5B8DA14B8
1 changed files with 9 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
compiler/rustc_mir/src/interpret/eval_context.rs
View file

@ -143,7 +143,7 @@ pub enum StackPopUnwind {
NotAllowed,
}
#[derive(Clone, Eq, PartialEq, Debug, HashStable)] // Miri debug-prints these
#[derive(Clone, Copy, Eq, PartialEq, Debug, HashStable)] // Miri debug-prints these
pub enum StackPopCleanup {
/// Jump to the next block in the caller, or cause UB if None (that's a function
/// that may never return). Also store layout of return place so
@ -815,21 +815,18 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// Usually we want to clean up (deallocate locals), but in a few rare cases we don't.
// In that case, we return early. We also avoid validation in that case,
// because this is CTFE and the final value will be thoroughly validated anyway.
let (cleanup, next_block) = match frame.return_to_block {
StackPopCleanup::Goto { ret, unwind } => (
let (cleanup, next_block) = match (frame.return_to_block, unwinding) {
(StackPopCleanup::Goto { ret, .. }, false) => (true, Some(ret)),
(StackPopCleanup::Goto { unwind, .. }, true) => (
true,
Some(if unwinding {
match unwind {
StackPopUnwind::Cleanup(unwind) => unwind,
StackPopUnwind::NotAllowed => {
throw_ub_format!("unwind past a frame that does not allow unwinding")
}
Some(match unwind {
StackPopUnwind::Cleanup(unwind) => unwind,
StackPopUnwind::NotAllowed => {
throw_ub_format!("unwind past a frame that does not allow unwinding")
}
} else {
ret
}),
),
StackPopCleanup::None { cleanup, .. } => (cleanup, None),
(StackPopCleanup::None { cleanup, .. }, _) => (cleanup, None),
};
if !cleanup {