bjoernager/rust
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or-patterns: liveness/visit_arm: remove top_pats_hack.

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This commit is contained in:
Mazdak Farrokhzad 2019-09-15 03:55:34 +02:00
parent 9d1c3c96e7
commit cc5fe6d520
1 changed files with 11 additions and 18 deletions
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29
src/librustc/middle/liveness.rs
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@ -404,7 +404,7 @@ fn visit_fn<'tcx>(
lsets.warn_about_unused_args(body, entry_ln);
}
fn add_from_pat<'tcx>(ir: &mut IrMaps<'tcx>, pat: &P<hir::Pat>) {
fn add_from_pat(ir: &mut IrMaps<'_>, pat: &P<hir::Pat>) {
// For struct patterns, take note of which fields used shorthand
// (`x` rather than `x: x`).
let mut shorthand_field_ids = HirIdSet::default();
@ -412,26 +412,21 @@ fn add_from_pat<'tcx>(ir: &mut IrMaps<'tcx>, pat: &P<hir::Pat>) {
pats.push_back(pat);
while let Some(pat) = pats.pop_front() {
use crate::hir::PatKind::*;
match pat.node {
Binding(_, _, _, ref inner_pat) => {
match &pat.node {
Binding(.., inner_pat) => {
pats.extend(inner_pat.iter());
}
Struct(_, ref fields, _) => {
for field in fields {
if field.is_shorthand {
shorthand_field_ids.insert(field.pat.hir_id);
}
}
Struct(_, fields, _) => {
let ids = fields.iter().filter(|f| f.is_shorthand).map(|f| f.pat.hir_id);
shorthand_field_ids.extend(ids);
}
Ref(ref inner_pat, _) |
Box(ref inner_pat) => {
Ref(inner_pat, _) | Box(inner_pat) => {
pats.push_back(inner_pat);
}
TupleStruct(_, ref inner_pats, _) |
Tuple(ref inner_pats, _) => {
TupleStruct(_, inner_pats, _) | Tuple(inner_pats, _) | Or(inner_pats) => {
pats.extend(inner_pats.iter());
}
Slice(ref pre_pats, ref inner_pat, ref post_pats) => {
Slice(pre_pats, inner_pat, post_pats) => {
pats.extend(pre_pats.iter());
pats.extend(inner_pat.iter());
pats.extend(post_pats.iter());
@ -440,7 +435,7 @@ fn add_from_pat<'tcx>(ir: &mut IrMaps<'tcx>, pat: &P<hir::Pat>) {
}
}
pat.each_binding(|_bm, hir_id, _sp, ident| {
pat.each_binding(|_, hir_id, _, ident| {
ir.add_live_node_for_node(hir_id, VarDefNode(ident.span));
ir.add_variable(Local(LocalInfo {
id: hir_id,
@ -456,9 +451,7 @@ fn visit_local<'tcx>(ir: &mut IrMaps<'tcx>, local: &'tcx hir::Local) {
}
fn visit_arm<'tcx>(ir: &mut IrMaps<'tcx>, arm: &'tcx hir::Arm) {
for pat in arm.top_pats_hack() {
add_from_pat(ir, pat);
}
add_from_pat(ir, &arm.pat);
intravisit::walk_arm(ir, arm);
}