rustc_typeck to rustc_hir_analysis

[rust.git] / clippy_lints / src / escape.rs

diff --git a/clippy_lints/src/escape.rs b/clippy_lints/src/escape.rs
index 8b0e9e6bc9b9344548a88096bf63a8a744e41a22..8ccc969646ec5f4aa2b29d1459664c0b21ca34af 100644 (file)
--- a/clippy_lints/src/escape.rs
+++ b/clippy_lints/src/escape.rs
@@ -1,17 +1,16 @@
-use clippy_utils::diagnostics::span_lint;
-use clippy_utils::ty::contains_ty;
+use clippy_utils::diagnostics::span_lint_hir;
 use rustc_hir::intravisit;
-use rustc_hir::{self, AssocItemKind, Body, FnDecl, HirId, HirIdSet, Impl, ItemKind, Node};
+use rustc_hir::{self, AssocItemKind, Body, FnDecl, HirId, HirIdSet, Impl, ItemKind, Node, Pat, PatKind};
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::mir::FakeReadCause;
+use rustc_middle::ty::layout::LayoutOf;
 use rustc_middle::ty::{self, TraitRef, Ty};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::source_map::Span;
 use rustc_span::symbol::kw;
-use rustc_target::abi::LayoutOf;
 use rustc_target::spec::abi::Abi;
-use rustc_typeck::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId};
+use rustc_hir_analysis::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId};
 
 #[derive(Copy, Clone)]
 pub struct BoxedLocal {
@@ -30,17 +29,14 @@ pub struct BoxedLocal {
     ///
     /// ### Example
     /// ```rust
-    /// # fn foo(bar: usize) {}
-    /// // Bad
-    /// let x = Box::new(1);
-    /// foo(*x);
-    /// println!("{}", *x);
+    /// fn foo(x: Box<u32>) {}
+    /// ```
     ///
-    /// // Good
-    /// let x = 1;
-    /// foo(x);
-    /// println!("{}", x);
+    /// Use instead:
+    /// ```rust
+    /// fn foo(x: u32) {}
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub BOXED_LOCAL,
     perf,
     "using `Box<T>` where unnecessary"
@@ -53,7 +49,7 @@ fn is_non_trait_box(ty: Ty<'_>) -> bool {
 struct EscapeDelegate<'a, 'tcx> {
     cx: &'a LateContext<'tcx>,
     set: HirIdSet,
-    trait_self_ty: Option<Ty<'a>>,
+    trait_self_ty: Option<Ty<'tcx>>,
     too_large_for_stack: u64,
 }
 
@@ -75,8 +71,8 @@ fn check_fn(
             }
         }
 
-        let parent_id = cx.tcx.hir().get_parent_item(hir_id);
-        let parent_node = cx.tcx.hir().find(parent_id);
+        let parent_id = cx.tcx.hir().get_parent_item(hir_id).def_id;
+        let parent_node = cx.tcx.hir().find_by_def_id(parent_id);
 
         let mut trait_self_ty = None;
         if let Some(Node::Item(item)) = parent_node {
@@ -90,9 +86,12 @@ fn check_fn(
                 for trait_item in items {
                     if trait_item.id.hir_id() == hir_id {
                         // be sure we have `self` parameter in this function
-                        if let AssocItemKind::Fn { has_self: true } = trait_item.kind {
-                            trait_self_ty =
-                                Some(TraitRef::identity(cx.tcx, trait_item.id.def_id.to_def_id()).self_ty());
+                        if trait_item.kind == (AssocItemKind::Fn { has_self: true }) {
+                            trait_self_ty = Some(
+                                TraitRef::identity(cx.tcx, trait_item.id.def_id.to_def_id())
+                                    .self_ty()
+                                    .skip_binder(),
+                            );
                         }
                     }
                 }
@@ -112,9 +111,10 @@ fn check_fn(
         });
 
         for node in v.set {
-            span_lint(
+            span_lint_hir(
                 cx,
                 BOXED_LOCAL,
+                node,
                 cx.tcx.hir().span(node),
                 "local variable doesn't need to be boxed here",
             );
@@ -125,7 +125,10 @@ fn check_fn(
 // TODO: Replace with Map::is_argument(..) when it's fixed
 fn is_argument(map: rustc_middle::hir::map::Map<'_>, id: HirId) -> bool {
     match map.find(id) {
-        Some(Node::Binding(_)) => (),
+        Some(Node::Pat(Pat {
+            kind: PatKind::Binding(..),
+            ..
+        })) => (),
         _ => return false,
     }
 
@@ -137,15 +140,6 @@ fn consume(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId) {
         if cmt.place.projections.is_empty() {
             if let PlaceBase::Local(lid) = cmt.place.base {
                 self.set.remove(&lid);
-                let map = &self.cx.tcx.hir();
-                if let Some(Node::Binding(_)) = map.find(cmt.hir_id) {
-                    if self.set.contains(&lid) {
-                        // let y = x where x is known
-                        // remove x, insert y
-                        self.set.insert(cmt.hir_id);
-                        self.set.remove(&lid);
-                    }
-                }
             }
         }
     }
@@ -171,7 +165,7 @@ fn mutate(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId) {
                 // skip if there is a `self` parameter binding to a type
                 // that contains `Self` (i.e.: `self: Box<Self>`), see #4804
                 if let Some(trait_self_ty) = self.trait_self_ty {
-                    if map.name(cmt.hir_id) == kw::SelfLower && contains_ty(cmt.place.ty(), trait_self_ty) {
+                    if map.name(cmt.hir_id) == kw::SelfLower && cmt.place.ty().contains(trait_self_ty) {
                         return;
                     }
                 }
@@ -183,7 +177,7 @@ fn mutate(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId) {
         }
     }
 
-    fn fake_read(&mut self, _: rustc_typeck::expr_use_visitor::Place<'tcx>, _: FakeReadCause, _: HirId) {}
+    fn fake_read(&mut self, _: &rustc_hir_analysis::expr_use_visitor::PlaceWithHirId<'tcx>, _: FakeReadCause, _: HirId) {}
 }
 
 impl<'a, 'tcx> EscapeDelegate<'a, 'tcx> {