bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Introduce DotDotPos.

Browse source 
This shrinks `hir::Pat` from 88 to 72 bytes.
This commit is contained in:
Nicholas Nethercote 2022-09-01 13:29:57 +10:00
parent 4314615ff8
commit e67f39f8bc
15 changed files with 85 additions and 47 deletions
Download patch file Download diff file Expand all files Collapse all files

11
compiler/rustc_passes/src/dead.rs
View file

@ -226,19 +226,16 @@ impl<'tcx> MarkSymbolVisitor<'tcx> {
lhs: &hir::Pat<'_>,
res: Res,
pats: &[hir::Pat<'_>],
dotdot: Option<usize>,
dotdot: hir::DotDotPos,
) {
let variant = match self.typeck_results().node_type(lhs.hir_id).kind() {
ty::Adt(adt, _) => adt.variant_of_res(res),
_ => span_bug!(lhs.span, "non-ADT in tuple struct pattern"),
};
let first_n = pats.iter().enumerate().take(dotdot.unwrap_or(pats.len()));
let dotdot = dotdot.as_opt_usize().unwrap_or(pats.len());
let first_n = pats.iter().enumerate().take(dotdot);
let missing = variant.fields.len() - pats.len();
let last_n = pats
.iter()
.enumerate()
.skip(dotdot.unwrap_or(pats.len()))
.map(|(idx, pat)| (idx + missing, pat));
let last_n = pats.iter().enumerate().skip(dotdot).map(|(idx, pat)| (idx + missing, pat));
for (idx, pat) in first_n.chain(last_n) {
if let PatKind::Wild = pat.kind {
continue;