Merge branch 'rust-lang:master' into patch-1

CHANGELOG.md

@@ -5917,6 +5917,7 @@ Released 2018-09-13
 [`unnecessary_lazy_evaluations`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_lazy_evaluations
 [`unnecessary_literal_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_literal_unwrap
 [`unnecessary_map_on_constructor`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_on_constructor
+[`unnecessary_min_or_max`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_min_or_max
 [`unnecessary_mut_passed`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_mut_passed
 [`unnecessary_operation`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
 [`unnecessary_owned_empty_strings`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_owned_empty_strings

clippy_lints/src/cognitive_complexity.rs

@@ -1,7 +1,7 @@
 //! calculate cognitive complexity and warn about overly complex functions
 
 use clippy_utils::diagnostics::span_lint_and_help;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::{IntoSpan, SpanRangeExt};
 use clippy_utils::ty::is_type_diagnostic_item;
 use clippy_utils::visitors::for_each_expr_without_closures;
 use clippy_utils::{get_async_fn_body, is_async_fn, LimitStack};
@@ -12,7 +12,7 @@ use rustc_hir::{Body, Expr, ExprKind, FnDecl};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_session::impl_lint_pass;
 use rustc_span::def_id::LocalDefId;
-use rustc_span::{sym, BytePos, Span};
+use rustc_span::{sym, Span};
 
 declare_clippy_lint! {
     /// ### What it does
@@ -50,7 +50,6 @@ impl CognitiveComplexity {
 impl_lint_pass!(CognitiveComplexity => [COGNITIVE_COMPLEXITY]);
 
 impl CognitiveComplexity {
-    #[expect(clippy::cast_possible_truncation)]
     fn check<'tcx>(
         &mut self,
         cx: &LateContext<'tcx>,
@@ -100,17 +99,12 @@ impl CognitiveComplexity {
                 FnKind::ItemFn(ident, _, _) | FnKind::Method(ident, _) => ident.span,
                 FnKind::Closure => {
                     let header_span = body_span.with_hi(decl.output.span().lo());
-                    let pos = snippet_opt(cx, header_span).and_then(|snip| {
-                        let low_offset = snip.find('|')?;
-                        let high_offset = 1 + snip.get(low_offset + 1..)?.find('|')?;
-                        let low = header_span.lo() + BytePos(low_offset as u32);
-                        let high = low + BytePos(high_offset as u32 + 1);
-
-                        Some((low, high))
-                    });
-
-                    if let Some((low, high)) = pos {
-                        Span::new(low, high, header_span.ctxt(), header_span.parent())
+                    #[expect(clippy::range_plus_one)]
+                    if let Some(range) = header_span.map_range(cx, |src, range| {
+                        let mut idxs = src.get(range.clone())?.match_indices('|');
+                        Some(range.start + idxs.next()?.0..range.start + idxs.next()?.0 + 1)
+                    }) {
+                        range.with_ctxt(header_span.ctxt())
                     } else {
                         return;
                     }

clippy_lints/src/copies.rs

@@ -1,5 +1,5 @@
 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::source::{first_line_of_span, indent_of, reindent_multiline, snippet, IntoSpan, SpanRangeExt};
 use clippy_utils::ty::{needs_ordered_drop, InteriorMut};
 use clippy_utils::visitors::for_each_expr_without_closures;
 use clippy_utils::{
@@ -14,7 +14,7 @@ use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::impl_lint_pass;
 use rustc_span::hygiene::walk_chain;
 use rustc_span::source_map::SourceMap;
-use rustc_span::{BytePos, Span, Symbol};
+use rustc_span::{Span, Symbol};
 use std::borrow::Cow;
 
 declare_clippy_lint! {
@@ -266,12 +266,12 @@ fn lint_branches_sharing_code<'tcx>(
 
         let span = span.with_hi(last_block.span.hi());
         // Improve formatting if the inner block has indention (i.e. normal Rust formatting)
-        let test_span = Span::new(span.lo() - BytePos(4), span.lo(), span.ctxt(), span.parent());
-        let span = if snippet_opt(cx, test_span).map_or(false, |snip| snip == "    ") {
-            span.with_lo(test_span.lo())
-        } else {
-            span
-        };
+        let span = span
+            .map_range(cx, |src, range| {
+                (range.start > 4 && src.get(range.start - 4..range.start)? == "    ")
+                    .then_some(range.start - 4..range.end)
+            })
+            .map_or(span, |range| range.with_ctxt(span.ctxt()));
         (span, suggestion.to_string())
     });
 

clippy_lints/src/declared_lints.rs

@@ -471,6 +471,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
     crate::methods::UNNECESSARY_JOIN_INFO,
     crate::methods::UNNECESSARY_LAZY_EVALUATIONS_INFO,
     crate::methods::UNNECESSARY_LITERAL_UNWRAP_INFO,
+    crate::methods::UNNECESSARY_MIN_OR_MAX_INFO,
     crate::methods::UNNECESSARY_RESULT_MAP_OR_ELSE_INFO,
     crate::methods::UNNECESSARY_SORT_BY_INFO,
     crate::methods::UNNECESSARY_TO_OWNED_INFO,

clippy_lints/src/implicit_hasher.rs

@@ -14,7 +14,7 @@ use rustc_span::symbol::sym;
 use rustc_span::Span;
 
 use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_then};
-use clippy_utils::source::{snippet, snippet_opt};
+use clippy_utils::source::{snippet, IntoSpan, SpanRangeExt};
 use clippy_utils::ty::is_type_diagnostic_item;
 
 declare_clippy_lint! {
@@ -59,10 +59,8 @@ declare_clippy_lint! {
 declare_lint_pass!(ImplicitHasher => [IMPLICIT_HASHER]);
 
 impl<'tcx> LateLintPass<'tcx> for ImplicitHasher {
-    #[expect(clippy::cast_possible_truncation, clippy::too_many_lines)]
+    #[expect(clippy::too_many_lines)]
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
-        use rustc_span::BytePos;
-
         fn suggestion(
             cx: &LateContext<'_>,
             diag: &mut Diag<'_, ()>,
@@ -123,10 +121,11 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitHasher {
                     }
 
                     let generics_suggestion_span = impl_.generics.span.substitute_dummy({
-                        let pos = snippet_opt(cx, item.span.until(target.span()))
-                            .and_then(|snip| Some(item.span.lo() + BytePos(snip.find("impl")? as u32 + 4)));
-                        if let Some(pos) = pos {
-                            Span::new(pos, pos, item.span.ctxt(), item.span.parent())
+                        let range = (item.span.lo()..target.span().lo()).map_range(cx, |src, range| {
+                            Some(src.get(range.clone())?.find("impl")? + 4..range.end)
+                        });
+                        if let Some(range) = range {
+                            range.with_ctxt(item.span.ctxt())
                         } else {
                             return;
                         }
@@ -163,21 +162,16 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitHasher {
                             continue;
                         }
                         let generics_suggestion_span = generics.span.substitute_dummy({
-                            let pos = snippet_opt(
-                                cx,
-                                Span::new(
-                                    item.span.lo(),
-                                    body.params[0].pat.span.lo(),
-                                    item.span.ctxt(),
-                                    item.span.parent(),
-                                ),
-                            )
-                            .and_then(|snip| {
-                                let i = snip.find("fn")?;
-                                Some(item.span.lo() + BytePos((i + snip[i..].find('(')?) as u32))
-                            })
-                            .expect("failed to create span for type parameters");
-                            Span::new(pos, pos, item.span.ctxt(), item.span.parent())
+                            let range = (item.span.lo()..body.params[0].pat.span.lo()).map_range(cx, |src, range| {
+                                let (pre, post) = src.get(range.clone())?.split_once("fn")?;
+                                let pos = post.find('(')? + pre.len() + 2;
+                                Some(pos..pos)
+                            });
+                            if let Some(range) = range {
+                                range.with_ctxt(item.span.ctxt())
+                            } else {
+                                return;
+                            }
                         });
 
                         let mut ctr_vis = ImplicitHasherConstructorVisitor::new(cx, target);

clippy_lints/src/manual_unwrap_or_default.rs

@@ -53,20 +53,15 @@ declare_lint_pass!(ManualUnwrapOrDefault => [MANUAL_UNWRAP_OR_DEFAULT]);
 
 fn get_some<'tcx>(cx: &LateContext<'tcx>, pat: &Pat<'tcx>) -> Option<HirId> {
     if let PatKind::TupleStruct(QPath::Resolved(_, path), &[pat], _) = pat.kind
+        && let PatKind::Binding(_, pat_id, _, _) = pat.kind
         && let Some(def_id) = path.res.opt_def_id()
         // Since it comes from a pattern binding, we need to get the parent to actually match
         // against it.
         && let Some(def_id) = cx.tcx.opt_parent(def_id)
         && (cx.tcx.lang_items().get(LangItem::OptionSome) == Some(def_id)
         || cx.tcx.lang_items().get(LangItem::ResultOk) == Some(def_id))
     {
-        let mut bindings = Vec::new();
-        pat.each_binding(|_, id, _, _| bindings.push(id));
-        if let &[id] = bindings.as_slice() {
-            Some(id)
-        } else {
-            None
-        }
+        Some(pat_id)
     } else {
         None
     }

clippy_lints/src/matches/single_match.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::source::{expr_block, get_source_text, snippet};
+use clippy_utils::source::{expr_block, snippet, SpanRangeExt};
 use clippy_utils::ty::{implements_trait, is_type_diagnostic_item, peel_mid_ty_refs};
 use clippy_utils::{is_lint_allowed, is_unit_expr, is_wild, peel_blocks, peel_hir_pat_refs, peel_n_hir_expr_refs};
 use core::cmp::max;
@@ -17,7 +17,7 @@ use super::{MATCH_BOOL, SINGLE_MATCH, SINGLE_MATCH_ELSE};
 /// span, e.g. a string literal `"//"`, but we know that this isn't the case for empty
 /// match arms.
 fn empty_arm_has_comment(cx: &LateContext<'_>, span: Span) -> bool {
-    if let Some(ff) = get_source_text(cx, span)
+    if let Some(ff) = span.get_source_text(cx)
         && let Some(text) = ff.as_str()
     {
         text.as_bytes().windows(2).any(|w| w == b"//" || w == b"/*")

clippy_lints/src/methods/manual_inspect.rs

@@ -1,6 +1,6 @@
 use clippy_config::msrvs::{self, Msrv};
 use clippy_utils::diagnostics::span_lint_and_then;
-use clippy_utils::source::{get_source_text, with_leading_whitespace, SpanRange};
+use clippy_utils::source::{IntoSpan, SpanRangeExt};
 use clippy_utils::ty::get_field_by_name;
 use clippy_utils::visitors::{for_each_expr, for_each_expr_without_closures};
 use clippy_utils::{expr_use_ctxt, is_diag_item_method, is_diag_trait_item, path_to_local_id, ExprUseNode};
@@ -9,7 +9,7 @@ use rustc_errors::Applicability;
 use rustc_hir::{BindingMode, BorrowKind, ByRef, ClosureKind, Expr, ExprKind, Mutability, Node, PatKind};
 use rustc_lint::LateContext;
 use rustc_middle::ty::adjustment::{Adjust, Adjustment, AutoBorrow, AutoBorrowMutability};
-use rustc_span::{sym, BytePos, Span, Symbol, DUMMY_SP};
+use rustc_span::{sym, Span, Symbol, DUMMY_SP};
 
 use super::MANUAL_INSPECT;
 
@@ -98,17 +98,19 @@ pub(crate) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, arg: &Expr<'_>, name:
         let mut addr_of_edits = Vec::with_capacity(delayed.len());
         for x in delayed {
             match x {
-                UseKind::Return(s) => edits.push((with_leading_whitespace(cx, s).set_span_pos(s), String::new())),
+                UseKind::Return(s) => edits.push((s.with_leading_whitespace(cx).with_ctxt(s.ctxt()), String::new())),
                 UseKind::Borrowed(s) => {
-                    if let Some(src) = get_source_text(cx, s)
-                        && let Some(src) = src.as_str()
-                        && let trim_src = src.trim_start_matches([' ', '\t', '\n', '\r', '('])
-                        && trim_src.starts_with('&')
-                    {
-                        let range = s.into_range();
-                        #[expect(clippy::cast_possible_truncation)]
-                        let start = BytePos(range.start.0 + (src.len() - trim_src.len()) as u32);
-                        addr_of_edits.push(((start..BytePos(start.0 + 1)).set_span_pos(s), String::new()));
+                    #[expect(clippy::range_plus_one)]
+                    let range = s.map_range(cx, |src, range| {
+                        let src = src.get(range.clone())?;
+                        let trimmed = src.trim_start_matches([' ', '\t', '\n', '\r', '(']);
+                        trimmed.starts_with('&').then(|| {
+                            let pos = range.start + src.len() - trimmed.len();
+                            pos..pos + 1
+                        })
+                    });
+                    if let Some(range) = range {
+                        addr_of_edits.push((range.with_ctxt(s.ctxt()), String::new()));
                     } else {
                         requires_copy = true;
                         requires_deref = true;
@@ -174,7 +176,10 @@ pub(crate) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, arg: &Expr<'_>, name:
                 }),
             ));
             edits.push((
-                with_leading_whitespace(cx, final_expr.span).set_span_pos(final_expr.span),
+                final_expr
+                    .span
+                    .with_leading_whitespace(cx)
+                    .with_ctxt(final_expr.span.ctxt()),
                 String::new(),
             ));
             let app = if edits.iter().any(|(s, _)| s.from_expansion()) {

clippy_lints/src/methods/mod.rs

@@ -117,6 +117,7 @@ mod unnecessary_iter_cloned;
 mod unnecessary_join;
 mod unnecessary_lazy_eval;
 mod unnecessary_literal_unwrap;
+mod unnecessary_min_or_max;
 mod unnecessary_result_map_or_else;
 mod unnecessary_sort_by;
 mod unnecessary_to_owned;
@@ -3945,6 +3946,31 @@ declare_clippy_lint! {
     "cloning an `Option` via `as_ref().cloned()`"
 }
 
+declare_clippy_lint! {
+    /// ### What it does
+    /// Checks for unnecessary calls to `min()` or `max()` in the following cases
+    /// - Either both side is constant
+    /// - One side is clearly larger than the other, like i32::MIN and an i32 variable
+    ///
+    /// ### Why is this bad?
+    ///
+    /// In the aformentioned cases it is not necessary to call `min()` or `max()`
+    /// to compare values, it may even cause confusion.
+    ///
+    /// ### Example
+    /// ```no_run
+    /// let _ = 0.min(7_u32);
+    /// ```
+    /// Use instead:
+    /// ```no_run
+    /// let _ = 0;
+    /// ```
+    #[clippy::version = "1.78.0"]
+    pub UNNECESSARY_MIN_OR_MAX,
+    complexity,
+    "using 'min()/max()' when there is no need for it"
+}
+
 declare_clippy_lint! {
     /// ### What it does
     /// Checks for usage of `.map_or_else()` "map closure" for `Result` type.
@@ -4267,6 +4293,7 @@ impl_lint_pass!(Methods => [
     UNNECESSARY_GET_THEN_CHECK,
     NEEDLESS_CHARACTER_ITERATION,
     MANUAL_INSPECT,
+    UNNECESSARY_MIN_OR_MAX,
 ]);
 
 /// Extracts a method call name, args, and `Span` of the method name.
@@ -4566,6 +4593,9 @@ impl Methods {
                     Some(("bytes", recv2, [], _, _)) => bytes_count_to_len::check(cx, expr, recv, recv2),
                     _ => {},
                 },
+                ("min" | "max", [arg]) => {
+                    unnecessary_min_or_max::check(cx, expr, name, recv, arg);
+                },
                 ("drain", ..) => {
                     if let Node::Stmt(Stmt { hir_id: _, kind, .. }) = cx.tcx.parent_hir_node(expr.hir_id)
                         && matches!(kind, StmtKind::Semi(_))