Misc cleanup

clippy_lints/src/attrs/mod.rs

@@ -1,5 +1,3 @@
-//! checks for attributes
-
 mod allow_attributes;
 mod allow_attributes_without_reason;
 mod blanket_clippy_restriction_lints;

clippy_lints/src/cargo/common_metadata.rs

@@ -1,5 +1,3 @@
-//! lint on missing cargo common metadata
-
 use cargo_metadata::Metadata;
 use clippy_utils::diagnostics::span_lint;
 use rustc_lint::LateContext;

clippy_lints/src/cargo/multiple_crate_versions.rs

@@ -1,5 +1,3 @@
-//! lint on multiple versions of a crate being used
-
 use cargo_metadata::{DependencyKind, Metadata, Node, Package, PackageId};
 use clippy_utils::diagnostics::span_lint;
 use itertools::Itertools;

clippy_lints/src/casts/cast_possible_truncation.rs

@@ -4,7 +4,7 @@ use clippy_utils::expr_or_init;
 use clippy_utils::source::snippet;
 use clippy_utils::sugg::Sugg;
 use clippy_utils::ty::{get_discriminant_value, is_isize_or_usize};
-use rustc_errors::{Applicability, Diag, SuggestionStyle};
+use rustc_errors::{Applicability, Diag};
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{BinOpKind, Expr, ExprKind};
 use rustc_lint::LateContext;
@@ -190,12 +190,10 @@ fn offer_suggestion(
         format!("{cast_to_snip}::try_from({})", Sugg::hir(cx, cast_expr, ".."))
     };
 
-    diag.span_suggestion_with_style(
+    diag.span_suggestion_verbose(
         expr.span,
         "... or use `try_from` and handle the error accordingly",
         suggestion,
         Applicability::Unspecified,
-        // always show the suggestion in a separate line
-        SuggestionStyle::ShowAlways,
     );
 }

clippy_lints/src/casts/fn_to_numeric_cast_any.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::source::snippet_with_applicability;
-use rustc_errors::{Applicability, SuggestionStyle};
+use rustc_errors::Applicability;
 use rustc_hir::Expr;
 use rustc_lint::LateContext;
 use rustc_middle::ty::{self, Ty};
@@ -24,12 +24,11 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>,
             expr.span,
             format!("casting function pointer `{from_snippet}` to `{cast_to}`"),
             |diag| {
-                diag.span_suggestion_with_style(
+                diag.span_suggestion_verbose(
                     expr.span,
                     "did you mean to invoke the function?",
                     format!("{from_snippet}() as {cast_to}"),
                     applicability,
-                    SuggestionStyle::ShowAlways,
                 );
             },
         );

clippy_lints/src/checked_conversions.rs

@@ -1,5 +1,3 @@
-//! lint on manually implemented checked conversions that could be transformed into `try_from`
-
 use clippy_config::msrvs::{self, Msrv};
 use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_sugg;

clippy_lints/src/cognitive_complexity.rs

@@ -1,5 +1,3 @@
-//! calculate cognitive complexity and warn about overly complex functions
-
 use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_help;
 use clippy_utils::source::{IntoSpan, SpanRangeExt};

clippy_lints/src/collapsible_if.rs

@@ -1,17 +1,3 @@
-//! Checks for if expressions that contain only an if expression.
-//!
-//! For example, the lint would catch:
-//!
-//! ```rust,ignore
-//! if x {
-//!     if y {
-//!         println!("Hello world");
-//!     }
-//! }
-//! ```
-//!
-//! This lint is **warn** by default
-
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then};
 use clippy_utils::source::{snippet, snippet_block, snippet_block_with_applicability};
 use clippy_utils::sugg::Sugg;

clippy_lints/src/collection_is_never_read.rs

@@ -1,13 +1,12 @@
 use clippy_utils::diagnostics::span_lint;
-use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item};
+use clippy_utils::ty::{get_type_diagnostic_name, is_type_lang_item};
 use clippy_utils::visitors::{for_each_expr, Visitable};
 use clippy_utils::{get_enclosing_block, path_to_local_id};
 use core::ops::ControlFlow;
 use rustc_hir::{Body, ExprKind, HirId, LangItem, LetStmt, Node, PatKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
 use rustc_span::symbol::sym;
-use rustc_span::Symbol;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -44,24 +43,11 @@ declare_clippy_lint! {
 }
 declare_lint_pass!(CollectionIsNeverRead => [COLLECTION_IS_NEVER_READ]);
 
-// Add `String` here when it is added to diagnostic items
-static COLLECTIONS: [Symbol; 9] = [
-    sym::BTreeMap,
-    sym::BTreeSet,
-    sym::BinaryHeap,
-    sym::HashMap,
-    sym::HashSet,
-    sym::LinkedList,
-    sym::Option,
-    sym::Vec,
-    sym::VecDeque,
-];
-
 impl<'tcx> LateLintPass<'tcx> for CollectionIsNeverRead {
     fn check_local(&mut self, cx: &LateContext<'tcx>, local: &'tcx LetStmt<'tcx>) {
         // Look for local variables whose type is a container. Search surrounding block for read access.
         if let PatKind::Binding(_, local_id, _, _) = local.pat.kind
-            && match_acceptable_type(cx, local, &COLLECTIONS)
+            && match_acceptable_type(cx, local)
             && let Some(enclosing_block) = get_enclosing_block(cx, local.hir_id)
             && has_no_read_access(cx, local_id, enclosing_block)
         {
@@ -70,11 +56,22 @@ impl<'tcx> LateLintPass<'tcx> for CollectionIsNeverRead {
     }
 }
 
-fn match_acceptable_type(cx: &LateContext<'_>, local: &LetStmt<'_>, collections: &[Symbol]) -> bool {
+fn match_acceptable_type(cx: &LateContext<'_>, local: &LetStmt<'_>) -> bool {
     let ty = cx.typeck_results().pat_ty(local.pat);
-    collections.iter().any(|&sym| is_type_diagnostic_item(cx, ty, sym))
-    // String type is a lang item but not a diagnostic item for now so we need a separate check
-        || is_type_lang_item(cx, ty, LangItem::String)
+    matches!(
+        get_type_diagnostic_name(cx, ty),
+        Some(
+            sym::BTreeMap
+                | sym::BTreeSet
+                | sym::BinaryHeap
+                | sym::HashMap
+                | sym::HashSet
+                | sym::LinkedList
+                | sym::Option
+                | sym::Vec
+                | sym::VecDeque
+        )
+    ) || is_type_lang_item(cx, ty, LangItem::String)
 }
 
 fn has_no_read_access<'tcx, T: Visitable<'tcx>>(cx: &LateContext<'tcx>, id: HirId, block: T) -> bool {

clippy_lints/src/create_dir.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::source::snippet_with_applicability;
-use rustc_errors::{Applicability, SuggestionStyle};
+use rustc_errors::Applicability;
 use rustc_hir::{Expr, ExprKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
@@ -46,15 +46,14 @@ impl LateLintPass<'_> for CreateDir {
                 "calling `std::fs::create_dir` where there may be a better way",
                 |diag| {
                     let mut app = Applicability::MaybeIncorrect;
-                    diag.span_suggestion_with_style(
+                    diag.span_suggestion_verbose(
                         expr.span,
                         "consider calling `std::fs::create_dir_all` instead",
                         format!(
                             "create_dir_all({})",
                             snippet_with_applicability(cx, arg.span, "..", &mut app)
                         ),
                         app,
-                        SuggestionStyle::ShowAlways,
                     );
                 },
             );

clippy_lints/src/doc/lazy_continuation.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use itertools::Itertools;
-use rustc_errors::{Applicability, SuggestionStyle};
+use rustc_errors::Applicability;
 use rustc_lint::LateContext;
 use rustc_span::{BytePos, Span};
 use std::ops::Range;
@@ -59,12 +59,11 @@ pub(super) fn check(
                 && (doc_comment == "///" || doc_comment == "//!")
             {
                 // suggest filling in a blank line
-                diag.span_suggestion_with_style(
+                diag.span_suggestion_verbose(
                     line_break_span.shrink_to_lo(),
                     "if this should be its own paragraph, add a blank doc comment line",
                     format!("\n{doc_comment}"),
                     Applicability::MaybeIncorrect,
-                    SuggestionStyle::ShowAlways,
                 );
                 if ccount > 0 || blockquote_level > 0 {
                     diag.help("if this not intended to be a quote at all, escape it with `\\>`");
@@ -79,12 +78,11 @@ pub(super) fn check(
             if ccount == 0 && blockquote_level == 0 {
                 // simpler suggestion style for indentation
                 let indent = list_indentation - lcount;
-                diag.span_suggestion_with_style(
+                diag.span_suggestion_verbose(
                     span.shrink_to_hi(),
                     "indent this line",
                     std::iter::repeat(" ").take(indent).join(""),
                     Applicability::MaybeIncorrect,
-                    SuggestionStyle::ShowAlways,
                 );
                 diag.help("if this is supposed to be its own paragraph, add a blank line");
                 return;
@@ -107,12 +105,11 @@ pub(super) fn check(
                     suggested.push_str(text);
                 }
             }
-            diag.span_suggestion_with_style(
+            diag.span_suggestion_verbose(
                 span,
                 "add markers to start of line",
                 suggested,
                 Applicability::MachineApplicable,
-                SuggestionStyle::ShowAlways,
             );
             diag.help("if this not intended to be a quote at all, escape it with `\\>`");
         });

clippy_lints/src/doc/markdown.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then};
 use clippy_utils::source::snippet_with_applicability;
 use rustc_data_structures::fx::FxHashSet;
-use rustc_errors::{Applicability, SuggestionStyle};
+use rustc_errors::Applicability;
 use rustc_lint::LateContext;
 use rustc_span::{BytePos, Pos, Span};
 use url::Url;
@@ -137,24 +137,15 @@ fn check_word(cx: &LateContext<'_>, word: &str, span: Span, code_level: isize, b
     }
 
     if has_underscore(word) || word.contains("::") || is_camel_case(word) || word.ends_with("()") {
-        let mut applicability = Applicability::MachineApplicable;
-
         span_lint_and_then(
             cx,
             DOC_MARKDOWN,
             span,
             "item in documentation is missing backticks",
             |diag| {
+                let mut applicability = Applicability::MachineApplicable;
                 let snippet = snippet_with_applicability(cx, span, "..", &mut applicability);
-                diag.span_suggestion_with_style(
-                    span,
-                    "try",
-                    format!("`{snippet}`"),
-                    applicability,
-                    // always show the suggestion in a separate line, since the
-                    // inline presentation adds another pair of backticks
-                    SuggestionStyle::ShowAlways,
-                );
+                diag.span_suggestion_verbose(span, "try", format!("`{snippet}`"), applicability);
             },
         );
     }

clippy_lints/src/else_if_without_else.rs

@@ -1,5 +1,3 @@
-//! Lint on if expressions with an else if, but without a final else branch.
-
 use clippy_utils::diagnostics::span_lint_and_then;
 use rustc_ast::ast::{Expr, ExprKind};
 use rustc_lint::{EarlyContext, EarlyLintPass, LintContext};

clippy_lints/src/empty_enum.rs

@@ -1,5 +1,3 @@
-//! lint when there is an enum with no variants
-
 use clippy_utils::diagnostics::span_lint_and_help;
 use rustc_hir::{Item, ItemKind};
 use rustc_lint::{LateContext, LateLintPass};

clippy_lints/src/enum_clike.rs

@@ -1,6 +1,3 @@
-//! lint on C-like enums that are `repr(isize/usize)` and have values that
-//! don't fit into an `i32`
-
 use clippy_utils::consts::{mir_to_const, Constant};
 use clippy_utils::diagnostics::span_lint;
 use rustc_hir::{Item, ItemKind};

clippy_lints/src/eta_reduction.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then};
 use clippy_utils::higher::VecArgs;
 use clippy_utils::source::snippet_opt;
-use clippy_utils::ty::type_diagnostic_name;
+use clippy_utils::ty::get_type_diagnostic_name;
 use clippy_utils::usage::{local_used_after_expr, local_used_in};
 use clippy_utils::{get_path_from_caller_to_method_type, is_adjusted, path_to_local, path_to_local_id};
 use rustc_errors::Applicability;
@@ -139,7 +139,7 @@ fn check_clousure<'tcx>(cx: &LateContext<'tcx>, outer_receiver: Option<&Expr<'tc
         {
             let callee_ty_raw = typeck.expr_ty(callee);
             let callee_ty = callee_ty_raw.peel_refs();
-            if matches!(type_diagnostic_name(cx, callee_ty), Some(sym::Arc | sym::Rc))
+            if matches!(get_type_diagnostic_name(cx, callee_ty), Some(sym::Arc | sym::Rc))
                 || !check_inputs(typeck, body.params, None, args)
             {
                 return;

clippy_lints/src/float_literal.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::numeric_literal;
 use rustc_ast::ast::{self, LitFloatType, LitKind};
-use rustc_errors::{Applicability, SuggestionStyle};
+use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::{self, FloatTy};
@@ -117,12 +117,11 @@ impl<'tcx> LateLintPass<'tcx> for FloatLiteral {
                             if type_suffix.is_none() {
                                 float_str.push_str(".0");
                             }
-                            diag.span_suggestion_with_style(
+                            diag.span_suggestion_verbose(
                                 expr.span,
                                 "consider changing the type or replacing it with",
                                 numeric_literal::format(&float_str, type_suffix, true),
                                 Applicability::MachineApplicable,
-                                SuggestionStyle::ShowAlways,
                             );
                         },
                     );
@@ -134,12 +133,11 @@ impl<'tcx> LateLintPass<'tcx> for FloatLiteral {
                     expr.span,
                     "float has excessive precision",
                     |diag| {
-                        diag.span_suggestion_with_style(
+                        diag.span_suggestion_verbose(
                             expr.span,
                             "consider changing the type or truncating it to",
                             numeric_literal::format(&float_str, type_suffix, true),
                             Applicability::MachineApplicable,
-                            SuggestionStyle::ShowAlways,
                         );
                     },
                 );

clippy_lints/src/functions/impl_trait_in_params.rs

@@ -1,6 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::is_in_test;
 
+use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::intravisit::FnKind;
 use rustc_hir::{Body, GenericParam, Generics, HirId, ImplItem, ImplItemKind, TraitItem, TraitItemKind};
@@ -18,20 +19,18 @@ fn report(cx: &LateContext<'_>, param: &GenericParam<'_>, generics: &Generics<'_
         |diag| {
             if let Some(gen_span) = generics.span_for_param_suggestion() {
                 // If there's already a generic param with the same bound, do not lint **this** suggestion.
-                diag.span_suggestion_with_style(
+                diag.span_suggestion_verbose(
                     gen_span,
                     "add a type parameter",
                     format!(", {{ /* Generic name */ }}: {}", &param.name.ident().as_str()[5..]),
-                    rustc_errors::Applicability::HasPlaceholders,
-                    rustc_errors::SuggestionStyle::ShowAlways,
+                    Applicability::HasPlaceholders,
                 );
             } else {
-                diag.span_suggestion_with_style(
+                diag.span_suggestion_verbose(
                     generics.span,
                     "add a type parameter",
                     format!("<{{ /* Generic name */ }}: {}>", &param.name.ident().as_str()[5..]),
-                    rustc_errors::Applicability::HasPlaceholders,
-                    rustc_errors::SuggestionStyle::ShowAlways,
+                    Applicability::HasPlaceholders,
                 );
             }
         },