use crate::utils::span_lint;
+use rustc::declare_lint_pass;
use rustc::hir;
use rustc::hir::intravisit::{walk_expr, walk_fn, FnKind, NestedVisitorMap, Visitor};
use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
-use rustc::{declare_lint_pass, declare_tool_lint};
use rustc_data_structures::fx::FxHashMap;
+use rustc_session::declare_tool_lint;
use syntax::source_map::Span;
-use syntax::symbol::LocalInternedString;
+use syntax::symbol::Symbol;
declare_clippy_lint! {
/// **What it does:** Checks for unused labels.
}
struct UnusedLabelVisitor<'a, 'tcx> {
- labels: FxHashMap<LocalInternedString, Span>,
+ labels: FxHashMap<Symbol, Span>,
cx: &'a LateContext<'a, 'tcx>,
}
impl<'a, 'tcx> Visitor<'tcx> for UnusedLabelVisitor<'a, 'tcx> {
fn visit_expr(&mut self, expr: &'tcx hir::Expr) {
- match expr.node {
+ match expr.kind {
hir::ExprKind::Break(destination, _) | hir::ExprKind::Continue(destination) => {
if let Some(label) = destination.label {
- self.labels.remove(&label.ident.as_str());
+ self.labels.remove(&label.ident.name);
}
},
hir::ExprKind::Loop(_, Some(label), _) => {
- self.labels.insert(label.ident.as_str(), expr.span);
+ self.labels.insert(label.ident.name, expr.span);
},
_ => (),
}