diff options
Diffstat (limited to 'compiler/rustc_passes/src/upvars.rs')
| -rw-r--r-- | compiler/rustc_passes/src/upvars.rs | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/compiler/rustc_passes/src/upvars.rs b/compiler/rustc_passes/src/upvars.rs index fae88fbba36..88f202919bb 100644 --- a/compiler/rustc_passes/src/upvars.rs +++ b/compiler/rustc_passes/src/upvars.rs @@ -75,19 +75,19 @@ impl<'tcx> Visitor<'tcx> for CaptureCollector<'_, 'tcx> { } fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) { - if let hir::ExprKind::Closure(closure) = expr.kind { - if let Some(upvars) = self.tcx.upvars_mentioned(closure.def_id) { - // Every capture of a closure expression is a local in scope, - // that is moved/copied/borrowed into the closure value, and - // for this analysis they are like any other access to a local. - // - // E.g. in `|b| |c| (a, b, c)`, the upvars of the inner closure - // are `a` and `b`, and while `a` is not directly used in the - // outer closure, it needs to be an upvar there too, so that - // the inner closure can take it (from the outer closure's env). - for (&var_id, upvar) in upvars { - self.visit_local_use(var_id, upvar.span); - } + if let hir::ExprKind::Closure(closure) = expr.kind + && let Some(upvars) = self.tcx.upvars_mentioned(closure.def_id) + { + // Every capture of a closure expression is a local in scope, + // that is moved/copied/borrowed into the closure value, and + // for this analysis they are like any other access to a local. + // + // E.g. in `|b| |c| (a, b, c)`, the upvars of the inner closure + // are `a` and `b`, and while `a` is not directly used in the + // outer closure, it needs to be an upvar there too, so that + // the inner closure can take it (from the outer closure's env). + for (&var_id, upvar) in upvars { + self.visit_local_use(var_id, upvar.span); } } |