user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Auto merge of #10855 - Centri3:explicit_deref_methods, r=llogiq

Browse source 
Fix suggestion on fully qualified syntax

fixes #10850

changelog: [`explicit_deref_methods`]: Fix malformed suggestion on `Foo::deref(&foo)`
This commit is contained in:
bors 2023-06-04 14:40:50 +00:00
commit 58befc7de8
4 changed files with 86 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

21
clippy_lints/src/dereference.rs
View file

@ -56,9 +56,11 @@ declare_clippy_lint! {
/// let b = &*a;
/// ```
///
/// This lint excludes:
/// This lint excludes all of:
/// ```rust,ignore
/// let _ = d.unwrap().deref();
/// let _ = Foo::deref(&foo);
/// let _ = <Foo as Deref>::deref(&foo);
/// ```
#[clippy::version = "1.44.0"]
pub EXPLICIT_DEREF_METHODS,
@ -1480,7 +1482,7 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data
target_mut,
} => {
let mut app = Applicability::MachineApplicable;
let (expr_str, expr_is_macro_call) = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app);
let (expr_str, _expr_is_macro_call) = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app);
let ty = cx.typeck_results().expr_ty(expr);
let (_, ref_count) = peel_mid_ty_refs(ty);
let deref_str = if ty_changed_count >= ref_count && ref_count != 0 {
@ -1503,11 +1505,20 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, state: State, data
"&"
};
let expr_str = if !expr_is_macro_call && is_final_ufcs && expr.precedence().order() < PREC_PREFIX {
format!("({expr_str})")
// expr_str (the suggestion) is never shown if is_final_ufcs is true, since it's
// `expr.kind == ExprKind::Call`. Therefore, this is, afaik, always unnecessary.
/*
expr_str = if !expr_is_macro_call && is_final_ufcs && expr.precedence().order() < PREC_PREFIX {
Cow::Owned(format!("({expr_str})"))
} else {
expr_str.into_owned()
expr_str
};
*/
// Fix #10850, do not lint if it's `Foo::deref` instead of `foo.deref()`.
if is_final_ufcs {
return;
}
span_lint_and_sugg(
cx,