use crate::utils::{in_macro, span_lint_and_then};
use rustc_data_structures::fx::FxHashMap;
-use rustc_hir::*;
+use rustc_hir::{def_id, Crate, Impl, Item, ItemKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::{declare_tool_lint, impl_lint_pass};
use rustc_span::Span;
impl_lint_pass!(MultipleInherentImpl => [MULTIPLE_INHERENT_IMPL]);
-impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MultipleInherentImpl {
- fn check_item(&mut self, _: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
- if let ItemKind::Impl(_, _, _, ref generics, None, _, _) = item.kind {
- // Remember for each inherent implementation encoutered its span and generics
+impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl {
+ fn check_item(&mut self, _: &LateContext<'tcx>, item: &'tcx Item<'_>) {
+ if let ItemKind::Impl(Impl {
+ ref generics,
+ of_trait: None,
+ ..
+ }) = item.kind
+ {
+ // Remember for each inherent implementation encountered its span and generics
// but filter out implementations that have generic params (type or lifetime)
// or are derived from a macro
if !in_macro(item.span) && generics.params.is_empty() {
- self.impls.insert(item.hir_id.owner_def_id(), item.span);
+ self.impls.insert(item.def_id.to_def_id(), item.span);
}
}
}
- fn check_crate_post(&mut self, cx: &LateContext<'a, 'tcx>, krate: &'tcx Crate<'_>) {
- if let Some(item) = krate.items.values().next() {
+ fn check_crate_post(&mut self, cx: &LateContext<'tcx>, krate: &'tcx Crate<'_>) {
+ if !krate.items.is_empty() {
// Retrieve all inherent implementations from the crate, grouped by type
- for impls in cx
- .tcx
- .crate_inherent_impls(item.hir_id.owner_def_id().krate)
- .inherent_impls
- .values()
- {
+ for impls in cx.tcx.crate_inherent_impls(def_id::LOCAL_CRATE).inherent_impls.values() {
// Filter out implementations that have generic params (type or lifetime)
let mut impl_spans = impls.iter().filter_map(|impl_def| self.impls.get(impl_def));
if let Some(initial_span) = impl_spans.next() {
cx,
MULTIPLE_INHERENT_IMPL,
*additional_span,
- "Multiple implementations of this structure",
- |db| {
- db.span_note(*initial_span, "First implementation here");
+ "multiple implementations of this structure",
+ |diag| {
+ diag.span_note(*initial_span, "first implementation here");
},
)
})