//! lint on inherent implementations
use crate::utils::{in_macro, span_lint_and_then};
-use rustc::hir::*;
-use rustc::impl_lint_pass;
-use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
use rustc_data_structures::fx::FxHashMap;
-use rustc_session::declare_tool_lint;
+use rustc_hir::{def_id, Crate, Item, ItemKind};
+use rustc_lint::{LateContext, LateLintPass};
+use rustc_session::{declare_tool_lint, impl_lint_pass};
use rustc_span::Span;
declare_clippy_lint! {
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 {
+ 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.hir_id.owner.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().nth(0) {
+ fn check_crate_post(&mut self, cx: &LateContext<'tcx>, krate: &'tcx Crate<'_>) {
+ if let Some(item) = krate.items.values().next() {
// 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)
+ .crate_inherent_impls(item.hir_id.owner.to_def_id().krate)
.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.nth(0) {
+ if let Some(initial_span) = impl_spans.next() {
impl_spans.for_each(|additional_span| {
span_lint_and_then(
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");
},
)
})