Upgrade rust to f93ab64d4a1a7ee91759a1594ab2a426b6cc657e/rustc-1.5.0-dev.

9 files changed, 87 insertions, 76 deletions

diff --git a/components/plugins/Cargo.toml b/components/plugins/Cargo.toml
index 0162a1f5516..9e317316984 100644
--- a/components/plugins/Cargo.toml
+++ b/components/plugins/Cargo.toml
@@ -9,7 +9,7 @@ path = "lib.rs"
 plugin = true
 
 [dependencies.tenacious]
-git = "https://github.com/servo/rust-tenacious"
+git = "https://github.com/Manishearth/rust-tenacious"
 
 [dependencies.clippy]
 git = "https://github.com/Manishearth/rust-clippy"
diff --git a/components/plugins/lib.rs b/components/plugins/lib.rs
index 250fa500a5e..a9fbb4ad280 100644
--- a/components/plugins/lib.rs
+++ b/components/plugins/lib.rs
@@ -20,11 +20,12 @@ extern crate syntax;
 #[macro_use]
 extern crate rustc;
 
+extern crate rustc_front;
+
 extern crate tenacious;
 #[cfg(feature = "clippy")]
 extern crate clippy;
 
-use rustc::lint::LintPassObject;
 use rustc::plugin::Registry;
 use syntax::ext::base::*;
 use syntax::feature_gate::AttributeType::Whitelisted;
@@ -50,12 +51,12 @@ pub fn plugin_registrar(reg: &mut Registry) {
     reg.register_syntax_extension(intern("derive_HeapSizeOf"), MultiDecorator(box heap_size::expand_heap_size));
     reg.register_macro("to_lower", casing::expand_lower);
     reg.register_macro("to_upper", casing::expand_upper);
-    reg.register_lint_pass(box lints::transmute_type::TransmutePass as LintPassObject);
-    reg.register_lint_pass(box lints::unrooted_must_root::UnrootedPass::new() as LintPassObject);
-    reg.register_lint_pass(box lints::privatize::PrivatizePass as LintPassObject);
-    reg.register_lint_pass(box lints::inheritance_integrity::InheritancePass as LintPassObject);
-    reg.register_lint_pass(box lints::ban::BanPass as LintPassObject);
-    reg.register_lint_pass(box tenacious::TenaciousPass as LintPassObject);
+    reg.register_late_lint_pass(box lints::transmute_type::TransmutePass);
+    reg.register_late_lint_pass(box lints::unrooted_must_root::UnrootedPass::new());
+    reg.register_late_lint_pass(box lints::privatize::PrivatizePass);
+    reg.register_late_lint_pass(box lints::inheritance_integrity::InheritancePass);
+    reg.register_early_lint_pass(box lints::ban::BanPass);
+    reg.register_late_lint_pass(box tenacious::TenaciousPass);
     reg.register_attribute("must_root".to_string(), Whitelisted);
     reg.register_attribute("servo_lang".to_string(), Whitelisted);
     reg.register_attribute("allow_unrooted_interior".to_string(), Whitelisted);
@@ -68,5 +69,5 @@ fn register_clippy(reg: &mut Registry) {
 }
 #[cfg(not(feature = "clippy"))]
 fn register_clippy(reg: &mut Registry) {
-    reg.register_lint_pass(box lints::str_to_string::StrToStringPass as LintPassObject);
+    reg.register_late_lint_pass(box lints::str_to_string::StrToStringPass);
 }
diff --git a/components/plugins/lints/ban.rs b/components/plugins/lints/ban.rs
index 70b81a70dd9..02037a5d76a 100644
--- a/components/plugins/lints/ban.rs
+++ b/components/plugins/lints/ban.rs
@@ -2,8 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::lint::{Context, LintPass, LintArray};
-use syntax::ast;
+use rustc::lint::{EarlyContext, LintPass, LintArray, EarlyLintPass, LintContext};
+use syntax::ast::Ty;
 use utils::match_ty_unwrap;
 
 declare_lint!(BANNED_TYPE, Deny,
@@ -21,8 +21,10 @@ impl LintPass for BanPass {
     fn get_lints(&self) -> LintArray {
         lint_array!(BANNED_TYPE)
     }
+}
 
-    fn check_ty(&mut self, cx: &Context, ty: &ast::Ty) {
+impl EarlyLintPass for BanPass {
+    fn check_ty(&mut self, cx: &EarlyContext, ty: &Ty) {
         if match_ty_unwrap(ty, &["std", "cell", "Cell"])
             .and_then(|t| t.get(0))
             .and_then(|t| match_ty_unwrap(&**t, &["dom", "bindings", "js", "JS"]))
diff --git a/components/plugins/lints/inheritance_integrity.rs b/components/plugins/lints/inheritance_integrity.rs
index ac9c965e7b2..e1845b0a786 100644
--- a/components/plugins/lints/inheritance_integrity.rs
+++ b/components/plugins/lints/inheritance_integrity.rs
@@ -2,9 +2,10 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::lint::{Context, LintPass, LintArray, Level};
+use rustc::lint::{LateContext, LintPass, LintArray, Level, LateLintPass, LintContext};
 use rustc::middle::def;
 use rustc::middle::def_id::DefId;
+use rustc_front::hir;
 use syntax::ast;
 use utils::match_lang_ty;
 
@@ -21,9 +22,11 @@ impl LintPass for InheritancePass {
     fn get_lints(&self) -> LintArray {
         lint_array!(INHERITANCE_INTEGRITY)
     }
+}
 
-    fn check_struct_def(&mut self, cx: &Context, def: &ast::StructDef, _i: ast::Ident,
-                        _gen: &ast::Generics, id: ast::NodeId) {
+impl LateLintPass for InheritancePass {
+    fn check_struct_def(&mut self, cx: &LateContext, def: &hir::StructDef, _i: ast::Ident,
+                        _gen: &hir::Generics, id: ast::NodeId) {
         // Lints are run post expansion, so it's fine to use
         // #[_dom_struct_marker] here without also checking for #[dom_struct]
         if cx.tcx.has_attr(DefId::local(id), "_dom_struct_marker") {
@@ -43,7 +46,7 @@ impl LintPass for InheritancePass {
                                     .map(|(_, f)| f.span);
             // Find all #[dom_struct] fields
             let dom_spans: Vec<_> = def.fields.iter().enumerate().filter_map(|(ctr, f)| {
-                if let ast::TyPath(..) = f.node.ty.node {
+                if let hir::TyPath(..) = f.node.ty.node {
                     if let Some(&def::PathResolution { base_def: def::DefTy(def_id, _), .. }) =
                             cx.tcx.def_map.borrow().get(&f.node.ty.id) {
                         if cx.tcx.has_attr(def_id, "_dom_struct_marker") {
diff --git a/components/plugins/lints/privatize.rs b/components/plugins/lints/privatize.rs
index a4a684b68ab..07e5b903553 100644
--- a/components/plugins/lints/privatize.rs
+++ b/components/plugins/lints/privatize.rs
@@ -2,10 +2,10 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::lint::{Context, LintPass, LintArray};
+use rustc::lint::{LateContext, LintPass, LintArray, LateLintPass, LintContext};
 use rustc::middle::def_id::DefId;
+use rustc_front::hir;
 use syntax::ast;
-use syntax::ast::Public;
 use syntax::attr::AttrMetaMethods;
 
 declare_lint!(PRIVATIZE, Deny,
@@ -21,17 +21,19 @@ impl LintPass for PrivatizePass {
     fn get_lints(&self) -> LintArray {
         lint_array!(PRIVATIZE)
     }
+}
 
+impl LateLintPass for PrivatizePass {
     fn check_struct_def(&mut self,
-                        cx: &Context,
-                        def: &ast::StructDef,
+                        cx: &LateContext,
+                        def: &hir::StructDef,
                         _i: ast::Ident,
-                        _gen: &ast::Generics,
+                        _gen: &hir::Generics,
                         id: ast::NodeId) {
         if cx.tcx.has_attr(DefId::local(id), "privatize") {
             for field in &def.fields {
                 match field.node {
-                    ast::StructField_ { kind: ast::NamedField(ident, visibility), .. } if visibility == Public => {
+                    hir::StructField_ { kind: hir::NamedField(ident, visibility), .. } if visibility == hir::Public => {
                         cx.span_lint(PRIVATIZE, field.span,
                                      &format!("Field {} is public where only private fields are allowed",
                                               ident.name));
diff --git a/components/plugins/lints/str_to_string.rs b/components/plugins/lints/str_to_string.rs
index 431a161e999..80a16841323 100644
--- a/components/plugins/lints/str_to_string.rs
+++ b/components/plugins/lints/str_to_string.rs
@@ -2,9 +2,9 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::lint::{Context, LintPass, LintArray};
+use rustc::lint::{LateContext, LintPass, LintArray, LateLintPass, LintContext};
 use rustc::middle::ty;
-use syntax::ast;
+use rustc_front::hir;
 
 declare_lint!(STR_TO_STRING, Deny,
               "Warn when a String could use to_owned() instead of to_string()");
@@ -18,10 +18,12 @@ impl LintPass for StrToStringPass {
     fn get_lints(&self) -> LintArray {
         lint_array!(STR_TO_STRING)
     }
+}
 
-    fn check_expr(&mut self, cx: &Context, expr: &ast::Expr) {
+impl LateLintPass for StrToStringPass {
+    fn check_expr(&mut self, cx: &LateContext, expr: &hir::Expr) {
         match expr.node {
-            ast::ExprMethodCall(ref method, _, ref args)
+            hir::ExprMethodCall(ref method, _, ref args)
                 if method.node.name.as_str() == "to_string"
                 && is_str(cx, &*args[0]) => {
                 cx.span_lint(STR_TO_STRING, expr.span,
@@ -30,7 +32,7 @@ impl LintPass for StrToStringPass {
             _ => ()
         }
 
-        fn is_str(cx: &Context, expr: &ast::Expr) -> bool {
+        fn is_str(cx: &LateContext, expr: &hir::Expr) -> bool {
             fn walk_ty<'t>(ty: ty::Ty<'t>) -> ty::Ty<'t> {
                 match ty.sty {
                     ty::TyRef(_, ref tm) | ty::TyRawPtr(ref tm) => walk_ty(tm.ty),
diff --git a/components/plugins/lints/transmute_type.rs b/components/plugins/lints/transmute_type.rs
index 94255e377a7..8e7c2ed8429 100644
--- a/components/plugins/lints/transmute_type.rs
+++ b/components/plugins/lints/transmute_type.rs
@@ -2,8 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::lint::{Context, LintPass, LintArray};
-use syntax::ast;
+use rustc::lint::{LateContext, LintPass, LintArray, LateLintPass, LintContext};
+use rustc_front::hir;
 use syntax::attr::AttrMetaMethods;
 
 declare_lint!(TRANSMUTE_TYPE_LINT, Allow,
@@ -19,12 +19,14 @@ impl LintPass for TransmutePass {
     fn get_lints(&self) -> LintArray {
         lint_array!(TRANSMUTE_TYPE_LINT)
     }
+}
 
-    fn check_expr(&mut self, cx: &Context, ex: &ast::Expr) {
+impl LateLintPass for TransmutePass {
+    fn check_expr(&mut self, cx: &LateContext, ex: &hir::Expr) {
         match ex.node {
-            ast::ExprCall(ref expr, ref args) => {
+            hir::ExprCall(ref expr, ref args) => {
                 match expr.node {
-                    ast::ExprPath(_, ref path) => {
+                    hir::ExprPath(_, ref path) => {
                         if path.segments.last()
                                         .map_or(false, |ref segment| segment.identifier.name.as_str() == "transmute")
                            && args.len() == 1 {
diff --git a/components/plugins/lints/unrooted_must_root.rs b/components/plugins/lints/unrooted_must_root.rs
index f20d5a43f2a..04dc7dce3a5 100644
--- a/components/plugins/lints/unrooted_must_root.rs
+++ b/components/plugins/lints/unrooted_must_root.rs
@@ -2,12 +2,13 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::ast_map;
-use rustc::lint::{Context, LintPass, LintArray};
+use rustc::front::map as ast_map;
+use rustc::lint::{LateContext, LintPass, LintArray, LateLintPass, LintContext};
 use rustc::middle::astconv_util::ast_ty_to_prim_ty;
 use rustc::middle::ty;
+use rustc_front::{hir, visit};
 use syntax::attr::AttrMetaMethods;
-use syntax::{ast, codemap, visit};
+use syntax::{ast, codemap};
 use utils::{match_def_path, unsafe_context};
 
 declare_lint!(UNROOTED_MUST_ROOT, Deny,
@@ -43,7 +44,7 @@ impl UnrootedPass {
 }
 
 /// Checks if a type is unrooted or contains any owned unrooted types
-fn is_unrooted_ty(cx: &Context, ty: &ty::TyS, in_new_function: bool) -> bool {
+fn is_unrooted_ty(cx: &LateContext, ty: &ty::TyS, in_new_function: bool) -> bool {
     let mut ret = false;
     ty.maybe_walk(|t| {
         match t.sty {
@@ -76,12 +77,15 @@ impl LintPass for UnrootedPass {
     fn get_lints(&self) -> LintArray {
         lint_array!(UNROOTED_MUST_ROOT)
     }
+}
+
+impl LateLintPass for UnrootedPass {
     /// All structs containing #[must_root] types must be #[must_root] themselves
     fn check_struct_def(&mut self,
-                        cx: &Context,
-                        def: &ast::StructDef,
+                        cx: &LateContext,
+                        def: &hir::StructDef,
                         _i: ast::Ident,
-                        _gen: &ast::Generics,
+                        _gen: &hir::Generics,
                         id: ast::NodeId) {
         let item = match cx.tcx.map.get(id) {
             ast_map::Node::NodeItem(item) => item,
@@ -97,11 +101,11 @@ impl LintPass for UnrootedPass {
         }
     }
     /// All enums containing #[must_root] types must be #[must_root] themselves
-    fn check_variant(&mut self, cx: &Context, var: &ast::Variant, _gen: &ast::Generics) {
+    fn check_variant(&mut self, cx: &LateContext, var: &hir::Variant, _gen: &hir::Generics) {
         let ref map = cx.tcx.map;
         if map.expect_item(map.get_parent(var.node.id)).attrs.iter().all(|a| !a.check_name("must_root")) {
             match var.node.kind {
-                ast::TupleVariantKind(ref vec) => {
+                hir::TupleVariantKind(ref vec) => {
                     for ty in vec {
                         ast_ty_to_prim_ty(cx.tcx, &*ty.ty).map(|t| {
                             if is_unrooted_ty(cx, t, false) {
@@ -117,8 +121,8 @@ impl LintPass for UnrootedPass {
         }
     }
     /// Function arguments that are #[must_root] types are not allowed
-    fn check_fn(&mut self, cx: &Context, kind: visit::FnKind, decl: &ast::FnDecl,
-                block: &ast::Block, _span: codemap::Span, id: ast::NodeId) {
+    fn check_fn(&mut self, cx: &LateContext, kind: visit::FnKind, decl: &hir::FnDecl,
+                block: &hir::Block, _span: codemap::Span, id: ast::NodeId) {
         match kind {
             visit::FnKind::ItemFn(i, _, _, _, _, _) |
             visit::FnKind::Method(i, _, _) if i.name.as_str() == "new"
@@ -128,7 +132,7 @@ impl LintPass for UnrootedPass {
                 return;
             },
             visit::FnKind::ItemFn(_, _, style, _, _, _) => match style {
-                ast::Unsafety::Unsafe => return,
+                hir::Unsafety::Unsafe => return,
                 _ => ()
             },
             _ => ()
@@ -140,7 +144,7 @@ impl LintPass for UnrootedPass {
         }
 
         match block.rules {
-            ast::DefaultBlock => {
+            hir::DefaultBlock => {
                 for arg in &decl.inputs {
                     ast_ty_to_prim_ty(cx.tcx, &*arg.ty).map(|t| {
                         if is_unrooted_ty(cx, t, false) {
@@ -154,8 +158,8 @@ impl LintPass for UnrootedPass {
     }
 
     /// Trait casts from #[must_root] types are not allowed
-    fn check_expr(&mut self, cx: &Context, expr: &ast::Expr) {
-        fn require_rooted(cx: &Context, in_new_function: bool, subexpr: &ast::Expr) {
+    fn check_expr(&mut self, cx: &LateContext, expr: &hir::Expr) {
+        fn require_rooted(cx: &LateContext, in_new_function: bool, subexpr: &hir::Expr) {
             let ty = cx.tcx.expr_ty(&*subexpr);
             if is_unrooted_ty(cx, ty, in_new_function) {
                 cx.span_lint(UNROOTED_MUST_ROOT,
@@ -165,7 +169,7 @@ impl LintPass for UnrootedPass {
         };
 
         match expr.node {
-            ast::ExprCast(ref subexpr, _) => require_rooted(cx, self.in_new_function, &*subexpr),
+            hir::ExprCast(ref subexpr, _) => require_rooted(cx, self.in_new_function, &*subexpr),
             _ => {
                 // TODO(pcwalton): Check generics with a whitelist of allowed generics.
             }
@@ -176,11 +180,11 @@ impl LintPass for UnrootedPass {
     // Catches `let` statements and assignments which store a #[must_root] value
     // Expressions which return out of blocks eventually end up in a `let` or assignment
     // statement or a function return (which will be caught when it is used elsewhere)
-    fn check_stmt(&mut self, cx: &Context, s: &ast::Stmt) {
+    fn check_stmt(&mut self, cx: &LateContext, s: &hir::Stmt) {
         match s.node {
-            ast::StmtDecl(_, id) |
-            ast::StmtExpr(_, id) |
-            ast::StmtSemi(_, id) if unsafe_context(&cx.tcx.map, id) => {
+            hir::StmtDecl(_, id) |
+            hir::StmtExpr(_, id) |
+            hir::StmtSemi(_, id) if unsafe_context(&cx.tcx.map, id) => {
                 return
             },
             _ => ()
@@ -188,26 +192,21 @@ impl LintPass for UnrootedPass {
 
         let expr = match s.node {
             // Catch a `let` binding
-            ast::StmtDecl(ref decl, _) => match decl.node {
-                ast::DeclLocal(ref loc) => match loc.init {
+            hir::StmtDecl(ref decl, _) => match decl.node {
+                hir::DeclLocal(ref loc) => match loc.init {
                     Some(ref e) => &**e,
                     _ => return
                 },
                 _ => return
             },
-            ast::StmtExpr(ref expr, _) => match expr.node {
+            hir::StmtExpr(ref expr, _) => match expr.node {
                 // This catches deferred `let` statements
-                ast::ExprAssign(_, ref e) |
+                hir::ExprAssign(_, ref e) |
                 // Match statements allow you to bind onto the variable later in an arm
                 // We need not check arms individually since enum/struct fields are already
                 // linted in `check_struct_def` and `check_variant`
                 // (so there is no way of destructuring out a `#[must_root]` field)
-                ast::ExprMatch(ref e, _, _) => &**e,
-                // These are able to bind local variables, but are desugared into
-                // loops and matches pre-lint so should not be encountered
-                ast::ExprForLoop(..) => unreachable!(),
-                ast::ExprIfLet(..) => unreachable!(),
-                ast::ExprWhileLet(..) => unreachable!(),
+                hir::ExprMatch(ref e, _, _) => &**e,
                 _ => return
             },
             _ => return
diff --git a/components/plugins/utils.rs b/components/plugins/utils.rs
index 3780f1932a2..7576437a939 100644
--- a/components/plugins/utils.rs
+++ b/components/plugins/utils.rs
@@ -2,12 +2,12 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use rustc::ast_map;
-use rustc::lint::Context;
+use rustc::front::map as ast_map;
+use rustc::lint::LateContext;
 use rustc::middle::def;
 use rustc::middle::def_id::DefId;
+use rustc_front::hir;
 use syntax::ast;
-use syntax::ast::{TyPath, Path, AngleBracketedParameters, PathSegment, Ty};
 use syntax::attr::mark_used;
 use syntax::ptr::P;
 
@@ -15,16 +15,16 @@ use syntax::ptr::P;
 /// Matches a type with a provided string, and returns its type parameters if successful
 ///
 /// Try not to use this for types defined in crates you own, use match_lang_ty instead (for lint passes)
-pub fn match_ty_unwrap<'a>(ty: &'a Ty, segments: &[&str]) -> Option<&'a [P<Ty>]> {
+pub fn match_ty_unwrap<'a>(ty: &'a ast::Ty, segments: &[&str]) -> Option<&'a [P<ast::Ty>]> {
     match ty.node {
-        TyPath(_, Path { segments: ref seg, .. }) => {
-            // So ast::Path isn't the full path, just the tokens that were provided.
+        ast::TyPath(_, ast::Path { segments: ref seg, .. }) => {
+            // So hir::Path isn't the full path, just the tokens that were provided.
             // I could muck around with the maps and find the full path
             // however the more efficient way is to simply reverse the iterators and zip them
             // which will compare them in reverse until one of them runs out of segments
             if seg.iter().rev().zip(segments.iter().rev()).all(|(a, b)| a.identifier.name.as_str() == *b) {
                 match seg.last() {
-                    Some(&PathSegment { parameters: AngleBracketedParameters(ref a), .. }) => {
+                    Some(&ast::PathSegment { parameters: ast::AngleBracketedParameters(ref a), .. }) => {
                         Some(&a.types)
                     }
                     _ => None
@@ -38,9 +38,9 @@ pub fn match_ty_unwrap<'a>(ty: &'a Ty, segments: &[&str]) -> Option<&'a [P<Ty>]>
 }
 
 /// Checks if a type has a #[servo_lang = "str"] attribute
-pub fn match_lang_ty(cx: &Context, ty: &Ty, value: &str) -> bool {
+pub fn match_lang_ty(cx: &LateContext, ty: &hir::Ty, value: &str) -> bool {
     match ty.node {
-        TyPath(..) => {},
+        hir::TyPath(..) => {},
         _ => return false,
     }
 
@@ -52,7 +52,7 @@ pub fn match_lang_ty(cx: &Context, ty: &Ty, value: &str) -> bool {
     match_lang_did(cx, def_id, value)
 }
 
-pub fn match_lang_did(cx: &Context, did: DefId, value: &str) -> bool {
+pub fn match_lang_did(cx: &LateContext, did: DefId, value: &str) -> bool {
     cx.tcx.get_attrs(did).iter().any(|attr| {
         match attr.node.value.node {
             ast::MetaNameValue(ref name, ref val) if &**name == "servo_lang" => {
@@ -75,14 +75,14 @@ pub fn unsafe_context(map: &ast_map::Map, id: ast::NodeId) -> bool {
     match map.find(map.get_parent(id)) {
         Some(ast_map::NodeImplItem(itm)) => {
             match itm.node {
-                ast::MethodImplItem(ref sig, _) => sig.unsafety == ast::Unsafety::Unsafe,
+                hir::MethodImplItem(ref sig, _) => sig.unsafety == hir::Unsafety::Unsafe,
                 _ => false
             }
         },
         Some(ast_map::NodeItem(itm)) => {
             match itm.node {
-                ast::ItemFn(_, style, _, _, _, _) => match style {
-                    ast::Unsafety::Unsafe => true,
+                hir::ItemFn(_, style, _, _, _, _) => match style {
+                    hir::Unsafety::Unsafe => true,
                     _ => false,
                 },
                 _ => false,
@@ -96,7 +96,7 @@ pub fn unsafe_context(map: &ast_map::Map, id: ast::NodeId) -> bool {
 /// check if a DefId's path matches the given absolute type path
 /// usage e.g. with
 /// `match_def_path(cx, id, &["core", "option", "Option"])`
-pub fn match_def_path(cx: &Context, def_id: DefId, path: &[&str]) -> bool {
+pub fn match_def_path(cx: &LateContext, def_id: DefId, path: &[&str]) -> bool {
     cx.tcx.with_path(def_id, |iter| iter.map(|elem| elem.name())
         .zip(path.iter()).all(|(nm, p)| &nm.as_str() == p))
 }