Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs b/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs
new file mode 100644
index 000000000..a7c0e4392
--- /dev/null
+++ b/src/tools/clippy/clippy_lints/src/methods/chars_cmp_with_unwrap.rs
@@ -0,0 +1,44 @@
+use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::method_chain_args;
+use clippy_utils::source::snippet_with_applicability;
+use if_chain::if_chain;
+use rustc_ast::ast;
+use rustc_errors::Applicability;
+use rustc_hir as hir;
+use rustc_lint::LateContext;
+use rustc_lint::Lint;
+
+/// Wrapper fn for `CHARS_NEXT_CMP` and `CHARS_LAST_CMP` lints with `unwrap()`.
+pub(super) fn check<'tcx>(
+    cx: &LateContext<'tcx>,
+    info: &crate::methods::BinaryExprInfo<'_>,
+    chain_methods: &[&str],
+    lint: &'static Lint,
+    suggest: &str,
+) -> bool {
+    if_chain! {
+        if let Some(args) = method_chain_args(info.chain, chain_methods);
+        if let hir::ExprKind::Lit(ref lit) = info.other.kind;
+        if let ast::LitKind::Char(c) = lit.node;
+        then {
+            let mut applicability = Applicability::MachineApplicable;
+            span_lint_and_sugg(
+                cx,
+                lint,
+                info.expr.span,
+                &format!("you should use the `{}` method", suggest),
+                "like this",
+                format!("{}{}.{}('{}')",
+                        if info.eq { "" } else { "!" },
+                        snippet_with_applicability(cx, args[0][0].span, "..", &mut applicability),
+                        suggest,
+                        c.escape_default()),
+                applicability,
+            );
+
+            true
+        } else {
+            false
+        }
+    }
+}