Auto merge of #7449 - flip1995:remove-lints_enabled, r=camsteffen

Remove lints_enabled

r? `@camsteffen`

cc https://github.com/rust-lang/rust-clippy/pull/7448#issuecomment-876497862

I haven't added a variant with `last_node_with_lint_attrs` yet, since I didn't see a usecase for this. Also this field is not documented, so I'm wondering how it behaves with command line lints and so on.

changelog: none

clippy_lints/src/cargo_common_metadata.rs

@@ -2,8 +2,7 @@
 
 use std::path::PathBuf;
 
-use clippy_utils::diagnostics::span_lint;
+use clippy_utils::{diagnostics::span_lint, is_lint_allowed};
-use clippy_utils::lints_enabled;
 use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
@@ -85,7 +84,7 @@ fn is_empty_vec(value: &[String]) -> bool {
 
 impl LateLintPass<'_> for CargoCommonMetadata {
     fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
-        if !lints_enabled(cx, &[CARGO_COMMON_METADATA], CRATE_HIR_ID) {
+        if is_lint_allowed(cx, CARGO_COMMON_METADATA, CRATE_HIR_ID) {
             return;
         }
 

clippy_lints/src/copies.rs

@@ -2,7 +2,7 @@ use clippy_utils::diagnostics::{span_lint_and_note, span_lint_and_then};
 use clippy_utils::source::{first_line_of_span, indent_of, reindent_multiline, snippet, snippet_opt};
 use clippy_utils::{
     both, count_eq, eq_expr_value, get_enclosing_block, get_parent_expr, if_sequence, in_macro, is_else_clause,
-    lints_enabled, search_same, ContainsName, SpanlessEq, SpanlessHash,
+    is_lint_allowed, search_same, ContainsName, SpanlessEq, SpanlessHash,
 };
 use if_chain::if_chain;
 use rustc_data_structures::fx::FxHashSet;
@@ -337,8 +337,8 @@ fn scan_block_for_eq(cx: &LateContext<'tcx>, blocks: &[&Block<'tcx>]) -> Option<
             if block_expr_eq;
             if l_stmts.len() == r_stmts.len();
             if l_stmts.len() == current_start_eq;
-            if lints_enabled(cx, &[IF_SAME_THEN_ELSE], win[0].hir_id);
+            if !is_lint_allowed(cx, IF_SAME_THEN_ELSE, win[0].hir_id);
-            if lints_enabled(cx, &[IF_SAME_THEN_ELSE], win[1].hir_id);
+            if !is_lint_allowed(cx, IF_SAME_THEN_ELSE, win[1].hir_id);
             then {
                 span_lint_and_note(
                     cx,

clippy_lints/src/dereference.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::peel_mid_ty_refs;
-use clippy_utils::{get_parent_node, in_macro, is_allowed};
+use clippy_utils::{get_parent_node, in_macro, is_lint_allowed};
 use rustc_ast::util::parser::PREC_PREFIX;
 use rustc_errors::Applicability;
 use rustc_hir::{BorrowKind, Expr, ExprKind, HirId, MatchSource, Mutability, Node, UnOp};
@@ -107,7 +107,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing {
 
                 match kind {
                     RefOp::Method(target_mut)
-                        if !is_allowed(cx, EXPLICIT_DEREF_METHODS, expr.hir_id)
+                        if !is_lint_allowed(cx, EXPLICIT_DEREF_METHODS, expr.hir_id)
                             && is_linted_explicit_deref_position(parent, expr.hir_id, expr.span) =>
                     {
                         self.state = Some((

clippy_lints/src/derive.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_note, span_lint_and_then};
 use clippy_utils::paths;
 use clippy_utils::ty::{implements_trait, is_copy};
-use clippy_utils::{get_trait_def_id, is_allowed, is_automatically_derived, match_def_path};
+use clippy_utils::{get_trait_def_id, is_automatically_derived, is_lint_allowed, match_def_path};
 use if_chain::if_chain;
 use rustc_hir::def_id::DefId;
 use rustc_hir::intravisit::{walk_expr, walk_fn, walk_item, FnKind, NestedVisitorMap, Visitor};
@@ -362,7 +362,7 @@ fn check_unsafe_derive_deserialize<'tcx>(
         if let ty::Adt(def, _) = ty.kind();
         if let Some(local_def_id) = def.did.as_local();
         let adt_hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_def_id);
-        if !is_allowed(cx, UNSAFE_DERIVE_DESERIALIZE, adt_hir_id);
+        if !is_lint_allowed(cx, UNSAFE_DERIVE_DESERIALIZE, adt_hir_id);
         if cx.tcx.inherent_impls(def.did)
             .iter()
             .map(|imp_did| item_from_def_id(cx, *imp_did))

clippy_lints/src/inherent_impl.rs

@@ -1,7 +1,7 @@
 //! lint on inherent implementations
 
 use clippy_utils::diagnostics::span_lint_and_note;
-use clippy_utils::{in_macro, is_allowed};
+use clippy_utils::{in_macro, is_lint_allowed};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::{def_id::LocalDefId, Crate, Item, ItemKind, Node};
 use rustc_lint::{LateContext, LateLintPass};
@@ -59,7 +59,7 @@ impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl {
             .filter(|(&id, impls)| {
                 impls.len() > 1
                     // Check for `#[allow]` on the type definition
-                    && !is_allowed(
+                    && !is_lint_allowed(
                         cx,
                         MULTIPLE_INHERENT_IMPL,
                         cx.tcx.hir().local_def_id_to_hir_id(id),
@@ -123,7 +123,7 @@ fn get_impl_span(cx: &LateContext<'_>, id: LocalDefId) -> Option<Span> {
         ..
     }) = cx.tcx.hir().get(id)
     {
-        (!in_macro(span) && impl_item.generics.params.is_empty() && !is_allowed(cx, MULTIPLE_INHERENT_IMPL, id))
+        (!in_macro(span) && impl_item.generics.params.is_empty() && !is_lint_allowed(cx, MULTIPLE_INHERENT_IMPL, id))
             .then(|| span)
     } else {
         None

clippy_lints/src/len_zero.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg, span_lint_and_then};
 use clippy_utils::source::snippet_with_applicability;
-use clippy_utils::{get_item_name, get_parent_as_impl, is_allowed};
+use clippy_utils::{get_item_name, get_parent_as_impl, is_lint_allowed};
 use if_chain::if_chain;
 use rustc_ast::ast::LitKind;
 use rustc_errors::Applicability;
@@ -139,7 +139,7 @@ impl<'tcx> LateLintPass<'tcx> for LenZero {
             if let Some(ty_id) = cx.qpath_res(ty_path, imp.self_ty.hir_id).opt_def_id();
             if let Some(local_id) = ty_id.as_local();
             let ty_hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_id);
-            if !is_allowed(cx, LEN_WITHOUT_IS_EMPTY, ty_hir_id);
+            if !is_lint_allowed(cx, LEN_WITHOUT_IS_EMPTY, ty_hir_id);
             if let Some(output) = parse_len_output(cx, cx.tcx.fn_sig(item.def_id).skip_binder());
             then {
                 let (name, kind) = match cx.tcx.hir().find(ty_hir_id) {

clippy_lints/src/manual_map.rs

@@ -3,7 +3,7 @@ use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::{snippet_with_applicability, snippet_with_context};
 use clippy_utils::ty::{is_type_diagnostic_item, peel_mid_ty_refs_is_mutable};
 use clippy_utils::{
-    can_move_expr_to_closure, in_constant, is_allowed, is_else_clause, is_lang_ctor, path_to_local_id,
+    can_move_expr_to_closure, in_constant, is_else_clause, is_lang_ctor, is_lint_allowed, path_to_local_id,
     peel_hir_expr_refs,
 };
 use rustc_ast::util::parser::PREC_POSTFIX;
@@ -102,7 +102,7 @@ impl LateLintPass<'_> for ManualMap {
 
             // These two lints will go back and forth with each other.
             if cx.typeck_results().expr_ty(some_expr) == cx.tcx.types.unit
-                && !is_allowed(cx, OPTION_MAP_UNIT_FN, expr.hir_id)
+                && !is_lint_allowed(cx, OPTION_MAP_UNIT_FN, expr.hir_id)
             {
                 return;
             }
@@ -146,7 +146,7 @@ impl LateLintPass<'_> for ManualMap {
                     },
                     _ => {
                         if path_to_local_id(some_expr, id)
-                            && !is_allowed(cx, MATCH_AS_REF, expr.hir_id)
+                            && !is_lint_allowed(cx, MATCH_AS_REF, expr.hir_id)
                             && binding_ref.is_some()
                         {
                             return;

clippy_lints/src/matches.rs

@@ -7,7 +7,7 @@ use clippy_utils::sugg::Sugg;
 use clippy_utils::ty::{implements_trait, is_type_diagnostic_item, match_type, peel_mid_ty_refs};
 use clippy_utils::visitors::LocalUsedVisitor;
 use clippy_utils::{
-    get_parent_expr, in_macro, is_allowed, is_expn_of, is_lang_ctor, is_refutable, is_wild, meets_msrv, msrvs,
+    get_parent_expr, in_macro, is_expn_of, is_lang_ctor, is_lint_allowed, is_refutable, is_wild, meets_msrv, msrvs,
     path_to_local, path_to_local_id, peel_hir_pat_refs, peel_n_hir_expr_refs, recurse_or_patterns, remove_blocks,
     strip_pat_refs,
 };
@@ -707,7 +707,7 @@ fn check_single_match(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>], exp
         };
 
         let ty = cx.typeck_results().expr_ty(ex);
-        if *ty.kind() != ty::Bool || is_allowed(cx, MATCH_BOOL, ex.hir_id) {
+        if *ty.kind() != ty::Bool || is_lint_allowed(cx, MATCH_BOOL, ex.hir_id) {
             check_single_match_single_pattern(cx, ex, arms, expr, els);
             check_single_match_opt_like(cx, ex, arms, expr, ty, els);
         }

clippy_lints/src/multiple_crate_versions.rs

@@ -1,7 +1,7 @@
 //! lint on multiple versions of a crate being used
 
 use clippy_utils::diagnostics::span_lint;
-use clippy_utils::lints_enabled;
+use clippy_utils::is_lint_allowed;
 use rustc_hir::def_id::LOCAL_CRATE;
 use rustc_hir::{Crate, CRATE_HIR_ID};
 use rustc_lint::{LateContext, LateLintPass};
@@ -39,7 +39,7 @@ declare_lint_pass!(MultipleCrateVersions => [MULTIPLE_CRATE_VERSIONS]);
 
 impl LateLintPass<'_> for MultipleCrateVersions {
     fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
-        if !lints_enabled(cx, &[MULTIPLE_CRATE_VERSIONS], CRATE_HIR_ID) {
+        if is_lint_allowed(cx, MULTIPLE_CRATE_VERSIONS, CRATE_HIR_ID) {
             return;
         }
 

clippy_lints/src/ptr.rs

@@ -4,7 +4,7 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg, span_lint_and_the
 use clippy_utils::ptr::get_spans;
 use clippy_utils::source::snippet_opt;
 use clippy_utils::ty::{is_type_diagnostic_item, match_type, walk_ptrs_hir_ty};
-use clippy_utils::{expr_path_res, is_allowed, match_any_def_paths, paths};
+use clippy_utils::{expr_path_res, is_lint_allowed, match_any_def_paths, paths};
 use if_chain::if_chain;
 use rustc_errors::Applicability;
 use rustc_hir::{
@@ -246,7 +246,7 @@ fn check_fn(cx: &LateContext<'_>, decl: &FnDecl<'_>, fn_id: HirId, opt_body_id:
     for (idx, (arg, ty)) in decl.inputs.iter().zip(fn_ty.inputs()).enumerate() {
         // Honor the allow attribute on parameters. See issue 5644.
         if let Some(body) = &body {
-            if is_allowed(cx, PTR_ARG, body.params[idx].hir_id) {
+            if is_lint_allowed(cx, PTR_ARG, body.params[idx].hir_id) {
                 continue;
             }
         }

clippy_lints/src/strings.rs

@@ -2,7 +2,7 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_help, span_lint_and_sug
 use clippy_utils::source::{snippet, snippet_with_applicability};
 use clippy_utils::ty::is_type_diagnostic_item;
 use clippy_utils::SpanlessEq;
-use clippy_utils::{get_parent_expr, is_allowed, match_function_call, method_calls, paths};
+use clippy_utils::{get_parent_expr, is_lint_allowed, match_function_call, method_calls, paths};
 use if_chain::if_chain;
 use rustc_errors::Applicability;
 use rustc_hir::{BinOpKind, BorrowKind, Expr, ExprKind, LangItem, QPath};
@@ -124,7 +124,7 @@ impl<'tcx> LateLintPass<'tcx> for StringAdd {
         ) = e.kind
         {
             if is_string(cx, left) {
-                if !is_allowed(cx, STRING_ADD_ASSIGN, e.hir_id) {
+                if !is_lint_allowed(cx, STRING_ADD_ASSIGN, e.hir_id) {
                     let parent = get_parent_expr(cx, e);
                     if let Some(p) = parent {
                         if let ExprKind::Assign(target, _, _) = p.kind {

clippy_lints/src/unicode.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::is_allowed;
+use clippy_utils::is_lint_allowed;
 use clippy_utils::source::snippet;
 use rustc_ast::ast::LitKind;
 use rustc_errors::Applicability;
@@ -114,7 +114,7 @@ fn check_str(cx: &LateContext<'_>, span: Span, id: HirId) {
             span,
             "literal non-ASCII character detected",
             "consider replacing the string with",
-            if is_allowed(cx, UNICODE_NOT_NFC, id) {
+            if is_lint_allowed(cx, UNICODE_NOT_NFC, id) {
                 escape(string.chars())
             } else {
                 escape(string.nfc())
@@ -122,7 +122,7 @@ fn check_str(cx: &LateContext<'_>, span: Span, id: HirId) {
             Applicability::MachineApplicable,
         );
     }
-    if is_allowed(cx, NON_ASCII_LITERAL, id) && string.chars().zip(string.nfc()).any(|(a, b)| a != b) {
+    if is_lint_allowed(cx, NON_ASCII_LITERAL, id) && string.chars().zip(string.nfc()).any(|(a, b)| a != b) {
         span_lint_and_sugg(
             cx,
             UNICODE_NOT_NFC,

clippy_lints/src/utils/internal_lints.rs

@@ -3,8 +3,8 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_help, span_lint_and_sug
 use clippy_utils::source::snippet;
 use clippy_utils::ty::match_type;
 use clippy_utils::{
-    is_else_clause, is_expn_of, is_expr_path_def_path, lints_enabled, match_def_path, method_calls, path_to_res, paths,
+    is_else_clause, is_expn_of, is_expr_path_def_path, is_lint_allowed, match_def_path, method_calls, path_to_res,
-    SpanlessEq,
+    paths, SpanlessEq,
 };
 use if_chain::if_chain;
 use rustc_ast::ast::{Crate as AstCrate, ItemKind, LitKind, ModKind, NodeId};
@@ -353,7 +353,7 @@ impl_lint_pass!(LintWithoutLintPass => [DEFAULT_LINT, LINT_WITHOUT_LINT_PASS]);
 
 impl<'tcx> LateLintPass<'tcx> for LintWithoutLintPass {
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
-        if !lints_enabled(cx, &[DEFAULT_LINT], item.hir_id()) {
+        if is_lint_allowed(cx, DEFAULT_LINT, item.hir_id()) {
             return;
         }
 
@@ -411,7 +411,7 @@ impl<'tcx> LateLintPass<'tcx> for LintWithoutLintPass {
     }
 
     fn check_crate_post(&mut self, cx: &LateContext<'tcx>, _: &'tcx Crate<'_>) {
-        if !lints_enabled(cx, &[LINT_WITHOUT_LINT_PASS], CRATE_HIR_ID) {
+        if is_lint_allowed(cx, LINT_WITHOUT_LINT_PASS, CRATE_HIR_ID) {
             return;
         }
 
@@ -497,7 +497,7 @@ impl_lint_pass!(CompilerLintFunctions => [COMPILER_LINT_FUNCTIONS]);
 
 impl<'tcx> LateLintPass<'tcx> for CompilerLintFunctions {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
-        if !lints_enabled(cx, &[COMPILER_LINT_FUNCTIONS], expr.hir_id) {
+        if is_lint_allowed(cx, COMPILER_LINT_FUNCTIONS, expr.hir_id) {
             return;
         }
 
@@ -526,7 +526,7 @@ declare_lint_pass!(OuterExpnDataPass => [OUTER_EXPN_EXPN_DATA]);
 
 impl<'tcx> LateLintPass<'tcx> for OuterExpnDataPass {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
-        if !lints_enabled(cx, &[OUTER_EXPN_EXPN_DATA], expr.hir_id) {
+        if is_lint_allowed(cx, OUTER_EXPN_EXPN_DATA, expr.hir_id) {
             return;
         }
 
@@ -576,7 +576,7 @@ declare_lint_pass!(CollapsibleCalls => [COLLAPSIBLE_SPAN_LINT_CALLS]);
 
 impl<'tcx> LateLintPass<'tcx> for CollapsibleCalls {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
-        if !lints_enabled(cx, &[COLLAPSIBLE_SPAN_LINT_CALLS], expr.hir_id) {
+        if is_lint_allowed(cx, COLLAPSIBLE_SPAN_LINT_CALLS, expr.hir_id) {
             return;
         }
 
@@ -757,7 +757,7 @@ declare_lint_pass!(MatchTypeOnDiagItem => [MATCH_TYPE_ON_DIAGNOSTIC_ITEM]);
 
 impl<'tcx> LateLintPass<'tcx> for MatchTypeOnDiagItem {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
-        if !lints_enabled(cx, &[MATCH_TYPE_ON_DIAGNOSTIC_ITEM], expr.hir_id) {
+        if is_lint_allowed(cx, MATCH_TYPE_ON_DIAGNOSTIC_ITEM, expr.hir_id) {
             return;
         }
 

clippy_lints/src/wildcard_dependencies.rs

@@ -1,5 +1,4 @@
-use clippy_utils::diagnostics::span_lint;
+use clippy_utils::{diagnostics::span_lint, is_lint_allowed};
-use clippy_utils::lints_enabled;
 use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -31,7 +30,7 @@ declare_lint_pass!(WildcardDependencies => [WILDCARD_DEPENDENCIES]);
 
 impl LateLintPass<'_> for WildcardDependencies {
     fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
-        if !lints_enabled(cx, &[WILDCARD_DEPENDENCIES], CRATE_HIR_ID) {
+        if is_lint_allowed(cx, WILDCARD_DEPENDENCIES, CRATE_HIR_ID) {
             return;
         }
 

clippy_utils/src/lib.rs

@@ -1173,7 +1173,7 @@ pub fn is_try<'tcx>(cx: &LateContext<'_>, expr: &'tcx Expr<'tcx>) -> Option<&'tc
 /// Returns `true` if the lint is allowed in the current context
 ///
 /// Useful for skipping long running code when it's unnecessary
-pub fn is_allowed(cx: &LateContext<'_>, lint: &'static Lint, id: HirId) -> bool {
+pub fn is_lint_allowed(cx: &LateContext<'_>, lint: &'static Lint, id: HirId) -> bool {
     cx.tcx.lint_level_at_node(lint, id).0 == Level::Allow
 }
 
@@ -1541,25 +1541,6 @@ pub fn fn_def_id(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<DefId> {
     }
 }
 
-/// This function checks if any of the lints in the slice is enabled for the provided `HirId`.
-/// A lint counts as enabled with any of the levels: `Level::Forbid` | `Level::Deny` | `Level::Warn`
-///
-/// ```ignore
-/// #[deny(clippy::YOUR_AWESOME_LINT)]
-/// println!("Hello, World!"); // <- Clippy code: lints_enabled(cx, &[YOUR_AWESOME_LINT], id) == true
-///
-/// #[allow(clippy::YOUR_AWESOME_LINT)]
-/// println!("See you soon!"); // <- Clippy code: lints_enabled(cx, &[YOUR_AWESOME_LINT], id) == false
-/// ```
-pub fn lints_enabled(cx: &LateContext<'_>, lints: &[&'static Lint], id: HirId) -> bool {
-    lints.iter().any(|lint| {
-        matches!(
-            cx.tcx.lint_level_at_node(lint, id),
-            (Level::Forbid | Level::Deny | Level::Warn, _)
-        )
-    })
-}
-
 /// Returns Option<String> where String is a textual representation of the type encapsulated in the
 /// slice iff the given expression is a slice of primitives (as defined in the
 /// `is_recursively_primitive_type` function) and None otherwise.