Fix clippy.

clippy_lints/src/bytecount.rs

@@ -3,12 +3,13 @@
     span_lint_and_sugg, walk_ptrs_ty,
 };
 use if_chain::if_chain;
-use rustc_ast::ast::{Name, UintTy};
+use rustc_ast::ast::{UintTy};
 use rustc_errors::Applicability;
 use rustc_hir::{BinOpKind, BorrowKind, Expr, ExprKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_span::Symbol;
 
 declare_clippy_lint! {
     /// **What it does:** Checks for naive byte counts
@@ -95,11 +96,11 @@ fn check_expr(&mut self, cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
     }
 }
 
-fn check_arg(name: Name, arg: Name, needle: &Expr<'_>) -> bool {
+fn check_arg(name: Symbol, arg: Symbol, needle: &Expr<'_>) -> bool {
     name == arg && !contains_name(name, needle)
 }
 
-fn get_path_name(expr: &Expr<'_>) -> Option<Name> {
+fn get_path_name(expr: &Expr<'_>) -> Option<Symbol> {
     match expr.kind {
         ExprKind::Box(ref e) | ExprKind::AddrOf(BorrowKind::Ref, _, ref e) | ExprKind::Unary(UnOp::UnDeref, ref e) => {
             get_path_name(e)

clippy_lints/src/inline_fn_without_body.rs

@@ -2,11 +2,12 @@
 
 use crate::utils::span_lint_and_then;
 use crate::utils::sugg::DiagnosticBuilderExt;
-use rustc_ast::ast::{Attribute, Name};
+use rustc_ast::ast::Attribute;
 use rustc_errors::Applicability;
 use rustc_hir::{TraitFn, TraitItem, TraitItemKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_span::Symbol;
 
 declare_clippy_lint! {
     /// **What it does:** Checks for `#[inline]` on trait methods without bodies
@@ -38,7 +39,7 @@ fn check_trait_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx TraitItem
     }
 }
 
-fn check_attrs(cx: &LateContext<'_, '_>, name: Name, attrs: &[Attribute]) {
+fn check_attrs(cx: &LateContext<'_, '_>, name: Symbol, attrs: &[Attribute]) {
     for attr in attrs {
         if !attr.check_name(sym!(inline)) {
             continue;

clippy_lints/src/len_zero.rs

@@ -1,5 +1,5 @@
 use crate::utils::{get_item_name, snippet_with_applicability, span_lint, span_lint_and_sugg, walk_ptrs_ty};
-use rustc_ast::ast::{LitKind, Name};
+use rustc_ast::ast::LitKind;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_errors::Applicability;
 use rustc_hir::def_id::DefId;
@@ -7,7 +7,7 @@
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::source_map::{Span, Spanned};
+use rustc_span::source_map::{Span, Spanned, Symbol};
 
 declare_clippy_lint! {
     /// **What it does:** Checks for getting the length of something via `.len()`
@@ -226,7 +226,7 @@ fn check_cmp(cx: &LateContext<'_, '_>, span: Span, method: &Expr<'_>, lit: &Expr
 fn check_len(
     cx: &LateContext<'_, '_>,
     span: Span,
-    method_name: Name,
+    method_name: Symbol,
     args: &[Expr<'_>],
     lit: &LitKind,
     op: &str,

clippy_lints/src/lib.rs

@@ -335,7 +335,7 @@ macro_rules! declare_clippy_lint {
 pub use crate::utils::conf::Conf;
 
 mod reexport {
-    pub use rustc_ast::ast::Name;
+    pub use rustc_span::Symbol as Name;
 }
 
 /// Register all pre expansion lints

clippy_lints/src/map_clone.rs

@@ -3,14 +3,14 @@
     is_copy, is_type_diagnostic_item, match_trait_method, remove_blocks, snippet_with_applicability, span_lint_and_sugg,
 };
 use if_chain::if_chain;
-use rustc_ast::ast::Ident;
 use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::mir::Mutability;
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::source_map::Span;
+use rustc_span::Span;
+use rustc_span::symbol::Ident;
 
 declare_clippy_lint! {
     /// **What it does:** Checks for usage of `iterator.map(|x| x.clone())` and suggests

clippy_lints/src/non_expressive_names.rs

@@ -1,13 +1,13 @@
 use crate::utils::{span_lint, span_lint_and_then};
 use rustc_ast::ast::{
-    Arm, AssocItem, AssocItemKind, Attribute, Block, FnDecl, Ident, Item, ItemKind, Local, MacCall, Pat, PatKind,
+    Arm, AssocItem, AssocItemKind, Attribute, Block, FnDecl, Item, ItemKind, Local, MacCall, Pat, PatKind,
 };
 use rustc_ast::attr;
 use rustc_ast::visit::{walk_block, walk_expr, walk_pat, Visitor};
 use rustc_lint::{EarlyContext, EarlyLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::source_map::Span;
-use rustc_span::symbol::SymbolStr;
+use rustc_span::symbol::{Ident, SymbolStr};
 use std::cmp::Ordering;
 
 declare_clippy_lint! {

clippy_lints/src/unsafe_removed_from_name.rs

@@ -1,9 +1,9 @@
 use crate::utils::span_lint;
-use rustc_ast::ast::{Ident, Item, ItemKind, UseTree, UseTreeKind};
+use rustc_ast::ast::{Item, ItemKind, UseTree, UseTreeKind};
 use rustc_lint::{EarlyContext, EarlyLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::Span;
-use rustc_span::symbol::SymbolStr;
+use rustc_span::symbol::{Ident, SymbolStr};
 
 declare_clippy_lint! {
     /// **What it does:** Checks for imports that remove "unsafe" from an item's

clippy_lints/src/utils/hir_utils.rs

@@ -1,6 +1,5 @@
 use crate::consts::{constant_context, constant_simple};
 use crate::utils::differing_macro_contexts;
-use rustc_ast::ast::Name;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_hir::{
     BinOpKind, Block, BlockCheckMode, BodyId, BorrowKind, CaptureBy, Expr, ExprKind, Field, FnRetTy, GenericArg,
@@ -10,6 +9,7 @@
 use rustc_lint::LateContext;
 use rustc_middle::ich::StableHashingContextProvider;
 use rustc_middle::ty::TypeckTables;
+use rustc_span::Symbol;
 use std::hash::Hash;
 
 /// Type used to check whether two ast are the same. This is different from the
@@ -544,7 +544,7 @@ pub fn hash_exprs(&mut self, e: &[Expr<'_>]) {
         }
     }
 
-    pub fn hash_name(&mut self, n: Name) {
+    pub fn hash_name(&mut self, n: Symbol) {
         n.as_str().hash(&mut self.s);
     }
 

clippy_lints/src/utils/internal_lints.rs

@@ -4,7 +4,7 @@
     span_lint_and_help, span_lint_and_sugg, walk_ptrs_ty,
 };
 use if_chain::if_chain;
-use rustc_ast::ast::{Crate as AstCrate, ItemKind, LitKind, Name, NodeId};
+use rustc_ast::ast::{Crate as AstCrate, ItemKind, LitKind, NodeId};
 use rustc_ast::visit::FnKind;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_errors::Applicability;
@@ -17,7 +17,7 @@
 use rustc_middle::hir::map::Map;
 use rustc_session::{declare_lint_pass, declare_tool_lint, impl_lint_pass};
 use rustc_span::source_map::{Span, Spanned};
-use rustc_span::symbol::SymbolStr;
+use rustc_span::symbol::{Symbol, SymbolStr};
 
 use std::borrow::{Borrow, Cow};
 
@@ -245,8 +245,8 @@ fn check_crate(&mut self, cx: &EarlyContext<'_>, krate: &AstCrate) {
 
 #[derive(Clone, Debug, Default)]
 pub struct LintWithoutLintPass {
-    declared_lints: FxHashMap<Name, Span>,
-    registered_lints: FxHashSet<Name>,
+    declared_lints: FxHashMap<Symbol, Span>,
+    registered_lints: FxHashSet<Symbol>,
 }
 
 impl_lint_pass!(LintWithoutLintPass => [DEFAULT_LINT, LINT_WITHOUT_LINT_PASS]);
@@ -357,7 +357,7 @@ fn is_lint_ref_type<'tcx>(cx: &LateContext<'_, 'tcx>, ty: &Ty<'_>) -> bool {
 }
 
 struct LintCollector<'a, 'tcx> {
-    output: &'a mut FxHashSet<Name>,
+    output: &'a mut FxHashSet<Symbol>,
     cx: &'a LateContext<'a, 'tcx>,
 }
 

clippy_lints/src/utils/mod.rs

@@ -1077,7 +1077,7 @@ pub fn is_allowed(cx: &LateContext<'_, '_>, lint: &'static Lint, id: HirId) -> b
     cx.tcx.lint_level_at_node(lint, id).0 == Level::Allow
 }
 
-pub fn get_arg_name(pat: &Pat<'_>) -> Option<ast::Name> {
+pub fn get_arg_name(pat: &Pat<'_>) -> Option<Name> {
     match pat.kind {
         PatKind::Binding(.., ident, None) => Some(ident.name),
         PatKind::Ref(ref subpat, _) => get_arg_name(subpat),

clippy_lints/src/utils/ptr.rs

@@ -1,10 +1,9 @@
 use crate::utils::{get_pat_name, match_var, snippet};
-use rustc_ast::ast::Name;
 use rustc_hir::intravisit::{walk_expr, NestedVisitorMap, Visitor};
 use rustc_hir::{Body, BodyId, Expr, ExprKind, Param};
 use rustc_lint::LateContext;
 use rustc_middle::hir::map::Map;
-use rustc_span::source_map::Span;
+use rustc_span::{Span, Symbol};
 use std::borrow::Cow;
 
 pub fn get_spans(
@@ -25,7 +24,7 @@ pub fn get_spans(
 
 fn extract_clone_suggestions<'a, 'tcx>(
     cx: &LateContext<'a, 'tcx>,
-    name: Name,
+    name: Symbol,
     replace: &[(&'static str, &'static str)],
     body: &'tcx Body<'_>,
 ) -> Option<Vec<(Span, Cow<'static, str>)>> {
@@ -46,7 +45,7 @@ fn extract_clone_suggestions<'a, 'tcx>(
 
 struct PtrCloneVisitor<'a, 'tcx> {
     cx: &'a LateContext<'a, 'tcx>,
-    name: Name,
+    name: Symbol,
     replace: &'a [(&'static str, &'static str)],
     spans: Vec<(Span, Cow<'static, str>)>,
     abort: bool,
@@ -83,6 +82,6 @@ fn nested_visit_map(&mut self) -> NestedVisitorMap<Self::Map> {
     }
 }
 
-fn get_binding_name(arg: &Param<'_>) -> Option<Name> {
+fn get_binding_name(arg: &Param<'_>) -> Option<Symbol> {
     get_pat_name(&arg.pat)
 }

clippy_lints/src/utils/usage.rs

@@ -1,5 +1,4 @@
 use crate::utils::match_var;
-use rustc_ast::ast;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir::def::Res;
 use rustc_hir::intravisit::{walk_expr, NestedVisitorMap, Visitor};
@@ -8,7 +7,7 @@
 use rustc_lint::LateContext;
 use rustc_middle::hir::map::Map;
 use rustc_middle::ty;
-use rustc_span::symbol::Ident;
+use rustc_span::symbol::{Ident, Symbol};
 use rustc_typeck::expr_use_visitor::{ConsumeMode, Delegate, ExprUseVisitor, Place, PlaceBase};
 
 /// Returns a set of mutated local variable IDs, or `None` if mutations could not be determined.
@@ -78,7 +77,7 @@ fn mutate(&mut self, cmt: &Place<'tcx>) {
 }
 
 pub struct UsedVisitor {
-    pub var: ast::Name, // var to look for
+    pub var: Symbol,    // var to look for
     pub used: bool,     // has the var been used otherwise?
 }