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New lint: unnecessary_map_or (#11796)

Browse source 
Closes https://github.com/rust-lang/rust-clippy/issues/10118

This lint checks `map_or` method calls to check if they can be
consolidated down to something simpler and/or more readable.

For example, the code
```rs
let x = Some(5);
x.map_or(false, |n| n == 5)
```

can be rewritten as
```rs
let x = Some(5);
x == Some(5)
```

In addition, when the closure is more complex, the code can be altered
from, say,
```rs
let x = Ok::<Vec<i32>, i32>(vec![5]);
x.map_or(false, |n| n == [5])
```
into
```rs
let x = Ok::<Vec<i32>, i32>(vec![5]);
x.is_some_and(|n| n == [5])
```

This lint also considers cases where the `map_or` can be chained with
other method calls, and accommodates accordingly by adding extra
parentheses as needed to the suggestion.

changelog: add new lint `unnecessary_map_or`
This commit is contained in:
Catherine Flores 2024-11-13 00:08:36 +00:00 committed by GitHub
commit b829d53c19
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GPG key ID: B5690EEEBB952194
80 changed files with 547 additions and 165 deletions
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1
CHANGELOG.md
View file

@ -6071,6 +6071,7 @@ Released 2018-09-13
[`unnecessary_literal_bound`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_literal_bound
[`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_map_or`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_map_or
[`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

2
clippy_dev/src/setup/vscode.rs
View file

@ -84,7 +84,7 @@ fn delete_vs_task_file(path: &Path) -> bool {
/// It may fail silently.
fn try_delete_vs_directory_if_empty() {
let path = Path::new(VSCODE_DIR);
if path.read_dir().map_or(false, |mut iter| iter.next().is_none()) {
if path.read_dir().is_ok_and(|mut iter| iter.next().is_none()) {
// The directory is empty. We just try to delete it but allow a silence
// fail as an empty `.vscode` directory is still valid
let _silence_result = fs::remove_dir(path);

2
clippy_lints/src/attrs/useless_attribute.rs
View file

@ -16,7 +16,7 @@ pub(super) fn check(cx: &EarlyContext<'_>, item: &Item, attrs: &[Attribute]) {
return;
}
if let Some(lint_list) = &attr.meta_item_list() {
if attr.ident().map_or(false, |ident| is_lint_level(ident.name, attr.id)) {
if attr.ident().is_some_and(|ident| is_lint_level(ident.name, attr.id)) {
for lint in lint_list {
match item.kind {
ItemKind::Use(..) => {

4
clippy_lints/src/attrs/utils.rs
View file

@ -50,7 +50,7 @@ fn is_relevant_block(cx: &LateContext<'_>, typeck_results: &ty::TypeckResults<'_
block
.expr
.as_ref()
.map_or(false, |e| is_relevant_expr(cx, typeck_results, e)),
.is_some_and(|e| is_relevant_expr(cx, typeck_results, e)),
|stmt| match &stmt.kind {
StmtKind::Let(_) => true,
StmtKind::Expr(expr) | StmtKind::Semi(expr) => is_relevant_expr(cx, typeck_results, expr),
@ -60,7 +60,7 @@ fn is_relevant_block(cx: &LateContext<'_>, typeck_results: &ty::TypeckResults<'_
}
fn is_relevant_expr(cx: &LateContext<'_>, typeck_results: &ty::TypeckResults<'_>, expr: &Expr<'_>) -> bool {
if macro_backtrace(expr.span).last().map_or(false, |macro_call| {
if macro_backtrace(expr.span).last().is_some_and(|macro_call| {
is_panic(cx, macro_call.def_id) || cx.tcx.item_name(macro_call.def_id) == sym::unreachable
}) {
return false;

4
clippy_lints/src/bool_assert_comparison.rs
View file

@ -60,8 +60,8 @@ fn is_impl_not_trait_with_bool_out<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -
trait_id,
)
})
.map_or(false, |assoc_item| {
let proj = Ty::new_projection_from_args(cx.tcx, assoc_item.def_id, cx.tcx.mk_args_trait(ty, []));
.is_some_and(|assoc_item| {
let proj = Ty::new_projection(cx.tcx, assoc_item.def_id, cx.tcx.mk_args_trait(ty, []));
let nty = cx.tcx.normalize_erasing_regions(cx.param_env, proj);
nty.is_bool()

2
clippy_lints/src/booleans.rs
View file

@ -667,5 +667,5 @@ fn implements_ord(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
let ty = cx.typeck_results().expr_ty(expr);
cx.tcx
.get_diagnostic_item(sym::Ord)
.map_or(false, |id| implements_trait(cx, ty, id, &[]))
.is_some_and(|id| implements_trait(cx, ty, id, &[]))
}

8
clippy_lints/src/box_default.rs
View file

@ -45,7 +45,7 @@ impl LateLintPass<'_> for BoxDefault {
// And that method is `new`
&& seg.ident.name == sym::new
// And the call is that of a `Box` method
&& path_def_id(cx, ty).map_or(false, |id| Some(id) == cx.tcx.lang_items().owned_box())
&& path_def_id(cx, ty).is_some_and(|id| Some(id) == cx.tcx.lang_items().owned_box())
// And the single argument to the call is another function call
// This is the `T::default()` (or default equivalent) of `Box::new(T::default())`
&& let ExprKind::Call(arg_path, _) = arg.kind
@ -83,9 +83,9 @@ fn is_plain_default(cx: &LateContext<'_>, arg_path: &Expr<'_>) -> bool {
}
fn is_local_vec_expn(cx: &LateContext<'_>, expr: &Expr<'_>, ref_expr: &Expr<'_>) -> bool {
macro_backtrace(expr.span).next().map_or(false, |call| {
cx.tcx.is_diagnostic_item(sym::vec_macro, call.def_id) && call.span.eq_ctxt(ref_expr.span)
})
macro_backtrace(expr.span)
.next()
.is_some_and(|call| cx.tcx.is_diagnostic_item(sym::vec_macro, call.def_id) && call.span.eq_ctxt(ref_expr.span))
}
#[derive(Default)]

3
clippy_lints/src/casts/unnecessary_cast.rs
View file

@ -159,8 +159,7 @@ pub(super) fn check<'tcx>(
// The same is true if the expression encompassing the cast expression is a unary
// expression or an addressof expression.
let needs_block = matches!(cast_expr.kind, ExprKind::Unary(..) | ExprKind::AddrOf(..))
|| get_parent_expr(cx, expr)
.map_or(false, |e| matches!(e.kind, ExprKind::Unary(..) | ExprKind::AddrOf(..)));
|| get_parent_expr(cx, expr).is_some_and(|e| matches!(e.kind, ExprKind::Unary(..) | ExprKind::AddrOf(..)));
span_lint_and_sugg(
cx,

2
clippy_lints/src/comparison_chain.rs
View file

@ -110,7 +110,7 @@ impl<'tcx> LateLintPass<'tcx> for ComparisonChain {
let is_ord = cx
.tcx
.get_diagnostic_item(sym::Ord)
.map_or(false, |id| implements_trait(cx, ty, id, &[]));
.is_some_and(|id| implements_trait(cx, ty, id, &[]));
if !is_ord {
return;

16
clippy_lints/src/copies.rs
View file

@ -345,7 +345,7 @@ fn eq_binding_names(s: &Stmt<'_>, names: &[(HirId, Symbol)]) -> bool {
let mut i = 0usize;
let mut res = true;
l.pat.each_binding_or_first(&mut |_, _, _, name| {
if names.get(i).map_or(false, |&(_, n)| n == name.name) {
if names.get(i).is_some_and(|&(_, n)| n == name.name) {
i += 1;
} else {
res = false;
@ -389,12 +389,10 @@ fn eq_stmts(
let new_bindings = &moved_bindings[old_count..];
blocks
.iter()
.all(|b| get_stmt(b).map_or(false, |s| eq_binding_names(s, new_bindings)))
.all(|b| get_stmt(b).is_some_and(|s| eq_binding_names(s, new_bindings)))
} else {
true
}) && blocks
.iter()
.all(|b| get_stmt(b).map_or(false, |s| eq.eq_stmt(s, stmt)))
}) && blocks.iter().all(|b| get_stmt(b).is_some_and(|s| eq.eq_stmt(s, stmt)))
}
#[expect(clippy::too_many_lines)]
@ -451,9 +449,7 @@ fn scan_block_for_eq<'tcx>(
// x + 50
let expr_hash_eq = if let Some(e) = block.expr {
let hash = hash_expr(cx, e);
blocks
.iter()
.all(|b| b.expr.map_or(false, |e| hash_expr(cx, e) == hash))
blocks.iter().all(|b| b.expr.is_some_and(|e| hash_expr(cx, e) == hash))
} else {
blocks.iter().all(|b| b.expr.is_none())
};
@ -514,7 +510,7 @@ fn scan_block_for_eq<'tcx>(
});
if let Some(e) = block.expr {
for block in blocks {
if block.expr.map_or(false, |expr| !eq.eq_expr(expr, e)) {
if block.expr.is_some_and(|expr| !eq.eq_expr(expr, e)) {
moved_locals.truncate(moved_locals_at_start);
return BlockEq {
start_end_eq,
@ -533,7 +529,7 @@ fn scan_block_for_eq<'tcx>(
}
fn check_for_warn_of_moved_symbol(cx: &LateContext<'_>, symbols: &[(HirId, Symbol)], if_expr: &Expr<'_>) -> bool {
get_enclosing_block(cx, if_expr.hir_id).map_or(false, |block| {
get_enclosing_block(cx, if_expr.hir_id).is_some_and(|block| {
let ignore_span = block.span.shrink_to_lo().to(if_expr.span);
symbols

1
clippy_lints/src/declared_lints.rs
View file

@ -481,6 +481,7 @@ pub static LINTS: &[&crate::LintInfo] = &[
crate::methods::UNNECESSARY_JOIN_INFO,
crate::methods::UNNECESSARY_LAZY_EVALUATIONS_INFO,
crate::methods::UNNECESSARY_LITERAL_UNWRAP_INFO,
crate::methods::UNNECESSARY_MAP_OR_INFO,
crate::methods::UNNECESSARY_MIN_OR_MAX_INFO,
crate::methods::UNNECESSARY_RESULT_MAP_OR_ELSE_INFO,
crate::methods::UNNECESSARY_SORT_BY_INFO,

2
clippy_lints/src/default_numeric_fallback.rs
View file

@ -253,6 +253,6 @@ impl<'tcx> From<Ty<'tcx>> for ExplicitTyBound {
impl<'tcx> From<Option<Ty<'tcx>>> for ExplicitTyBound {
fn from(v: Option<Ty<'tcx>>) -> Self {
Self(v.map_or(false, Ty::is_numeric))
Self(v.is_some_and(Ty::is_numeric))
}
}

2
clippy_lints/src/derivable_impls.rs
View file

@ -81,7 +81,7 @@ fn is_path_self(e: &Expr<'_>) -> bool {
fn contains_trait_object(ty: Ty<'_>) -> bool {
match ty.kind() {
ty::Ref(_, ty, _) => contains_trait_object(*ty),
ty::Adt(def, args) => def.is_box() && args[0].as_type().map_or(false, contains_trait_object),
ty::Adt(def, args) => def.is_box() && args[0].as_type().is_some_and(contains_trait_object),
ty::Dynamic(..) => true,
_ => false,
}

2
clippy_lints/src/derive.rs
View file

@ -327,7 +327,7 @@ fn check_copy_clone<'tcx>(cx: &LateContext<'tcx>, item: &Item<'_>, trait_ref: &h
// there's a Copy impl for any instance of the adt.
if !is_copy(cx, ty) {
if ty_subs.non_erasable_generics().next().is_some() {
let has_copy_impl = cx.tcx.all_local_trait_impls(()).get(&copy_id).map_or(false, |impls| {
let has_copy_impl = cx.tcx.all_local_trait_impls(()).get(&copy_id).is_some_and(|impls| {
impls.iter().any(|&id| {
matches!(cx.tcx.type_of(id).instantiate_identity().kind(), ty::Adt(adt, _)
if ty_adt.did() == adt.did())

2
clippy_lints/src/doc/missing_headers.rs
View file

@ -47,7 +47,7 @@ pub fn check(
),
_ => (),
}
if !headers.panics && panic_info.map_or(false, |el| !el.1) {
if !headers.panics && panic_info.is_some_and(|el| !el.1) {
span_lint_and_note(
cx,
MISSING_PANICS_DOC,

2
clippy_lints/src/drop_forget_ref.rs
View file

@ -112,7 +112,7 @@ impl<'tcx> LateLintPass<'tcx> for DropForgetRef {
MEM_FORGET,
Cow::Owned(format!(
"usage of `mem::forget` on {}",
if arg_ty.ty_adt_def().map_or(false, |def| def.has_dtor(cx.tcx)) {
if arg_ty.ty_adt_def().is_some_and(|def| def.has_dtor(cx.tcx)) {
"`Drop` type"
} else {
"type with `Drop` fields"

2
clippy_lints/src/eta_reduction.rs
View file

@ -196,7 +196,7 @@ fn check_clousure<'tcx>(cx: &LateContext<'tcx>, outer_receiver: Option<&Expr<'tc
{
span_lint_and_then(cx, REDUNDANT_CLOSURE, expr.span, "redundant closure", |diag| {
if let Some(mut snippet) = snippet_opt(cx, callee.span) {
if path_to_local(callee).map_or(false, |l| {
if path_to_local(callee).is_some_and(|l| {
// FIXME: Do we really need this `local_used_in` check?
// Isn't it checking something like... `callee(callee)`?
// If somehow this check is needed, add some test for it,

2
clippy_lints/src/functions/not_unsafe_ptr_arg_deref.rs
View file

@ -87,7 +87,7 @@ fn raw_ptr_arg(cx: &LateContext<'_>, arg: &hir::Param<'_>) -> Option<HirId> {
}
fn check_arg(cx: &LateContext<'_>, raw_ptrs: &HirIdSet, arg: &hir::Expr<'_>) {
if path_to_local(arg).map_or(false, |id| raw_ptrs.contains(&id)) {
if path_to_local(arg).is_some_and(|id| raw_ptrs.contains(&id)) {
span_lint(
cx,
NOT_UNSAFE_PTR_ARG_DEREF,

8
clippy_lints/src/infinite_iter.rs
View file

@ -171,13 +171,13 @@ fn is_infinite(cx: &LateContext<'_>, expr: &Expr<'_>) -> Finiteness {
if let ExprKind::Path(ref qpath) = path.kind {
cx.qpath_res(qpath, path.hir_id)
.opt_def_id()
.map_or(false, |id| cx.tcx.is_diagnostic_item(sym::iter_repeat, id))
.is_some_and(|id| cx.tcx.is_diagnostic_item(sym::iter_repeat, id))
.into()
} else {
Finite
}
},
ExprKind::Struct(..) => higher::Range::hir(expr).map_or(false, |r| r.end.is_none()).into(),
ExprKind::Struct(..) => higher::Range::hir(expr).is_some_and(|r| r.end.is_none()).into(),
_ => Finite,
}
}
@ -228,9 +228,7 @@ fn complete_infinite_iter(cx: &LateContext<'_>, expr: &Expr<'_>) -> Finiteness {
let not_double_ended = cx
.tcx
.get_diagnostic_item(sym::DoubleEndedIterator)
.map_or(false, |id| {
!implements_trait(cx, cx.typeck_results().expr_ty(receiver), id, &[])
});
.is_some_and(|id| !implements_trait(cx, cx.typeck_results().expr_ty(receiver), id, &[]));
if not_double_ended {
return is_infinite(cx, receiver);
}

4
clippy_lints/src/item_name_repetitions.rs
View file

@ -309,8 +309,8 @@ fn check_enum_start(cx: &LateContext<'_>, item_name: &str, variant: &Variant<'_>
let item_name_chars = item_name.chars().count();
if count_match_start(item_name, name).char_count == item_name_chars
&& name.chars().nth(item_name_chars).map_or(false, |c| !c.is_lowercase())
&& name.chars().nth(item_name_chars + 1).map_or(false, |c| !c.is_numeric())
&& name.chars().nth(item_name_chars).is_some_and(|c| !c.is_lowercase())
&& name.chars().nth(item_name_chars + 1).is_some_and(|c| !c.is_numeric())
{
span_lint_hir(
cx,

2
clippy_lints/src/iter_not_returning_iterator.rs
View file

@ -75,7 +75,7 @@ fn check_sig(cx: &LateContext<'_>, name: Symbol, sig: &FnSig<'_>, fn_id: LocalDe
if cx
.tcx
.get_diagnostic_item(sym::Iterator)
.map_or(false, |iter_id| !implements_trait(cx, ret_ty, iter_id, &[]))
.is_some_and(|iter_id| !implements_trait(cx, ret_ty, iter_id, &[]))
{
span_lint(
cx,

2
clippy_lints/src/len_zero.rs
View file

@ -622,7 +622,7 @@ fn has_is_empty(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
let ty = &cx.typeck_results().expr_ty(expr).peel_refs();
match ty.kind() {
ty::Dynamic(tt, ..) => tt.principal().map_or(false, |principal| {
ty::Dynamic(tt, ..) => tt.principal().is_some_and(|principal| {
let is_empty = sym!(is_empty);
cx.tcx
.associated_items(principal.def_id())

2
clippy_lints/src/lifetimes.rs
View file

@ -737,7 +737,7 @@ fn elision_suggestions(
suggestions.extend(
usages
.iter()
.filter(|usage| named_lifetime(usage).map_or(false, |id| elidable_lts.contains(&id)))
.filter(|usage| named_lifetime(usage).is_some_and(|id| elidable_lts.contains(&id)))
.map(|usage| {
match cx.tcx.parent_hir_node(usage.hir_id) {
Node::Ty(Ty {

2
clippy_lints/src/loops/manual_find.rs
View file

@ -58,7 +58,7 @@ pub(super) fn check<'tcx>(
.tcx
.lang_items()
.copy_trait()
.map_or(false, |id| implements_trait(cx, ty, id, &[]))
.is_some_and(|id| implements_trait(cx, ty, id, &[]))
{
snippet.push_str(
&format!(

2
clippy_lints/src/loops/manual_memcpy.rs
View file

@ -416,7 +416,7 @@ fn get_assignments<'a, 'tcx>(
.chain(*expr)
.filter(move |e| {
if let ExprKind::AssignOp(_, place, _) = e.kind {
path_to_local(place).map_or(false, |id| {
path_to_local(place).is_some_and(|id| {
!loop_counters
.iter()
// skip the first item which should be `StartKind::Range`

2
clippy_lints/src/loops/mut_range_bound.rs
View file

@ -126,7 +126,7 @@ impl BreakAfterExprVisitor {
break_after_expr: false,
};
get_enclosing_block(cx, hir_id).map_or(false, |block| {
get_enclosing_block(cx, hir_id).is_some_and(|block| {
visitor.visit_block(block);
visitor.break_after_expr
})

2
clippy_lints/src/loops/same_item_push.rs
View file

@ -50,7 +50,7 @@ pub(super) fn check<'tcx>(
.tcx
.lang_items()
.clone_trait()
.map_or(false, |id| implements_trait(cx, ty, id, &[]))
.is_some_and(|id| implements_trait(cx, ty, id, &[]))
{
// Make sure that the push does not involve possibly mutating values
match pushed_item.kind {

7
clippy_lints/src/loops/utils.rs
View file

@ -256,9 +256,10 @@ fn is_conditional(expr: &Expr<'_>) -> bool {
/// If `arg` was the argument to a `for` loop, return the "cleanest" way of writing the
/// actual `Iterator` that the loop uses.
pub(super) fn make_iterator_snippet(cx: &LateContext<'_>, arg: &Expr<'_>, applic_ref: &mut Applicability) -> String {
let impls_iterator = cx.tcx.get_diagnostic_item(sym::Iterator).map_or(false, |id| {
implements_trait(cx, cx.typeck_results().expr_ty(arg), id, &[])
});
let impls_iterator = cx
.tcx
.get_diagnostic_item(sym::Iterator)
.is_some_and(|id| implements_trait(cx, cx.typeck_results().expr_ty(arg), id, &[]));
if impls_iterator {
format!(
"{}",

2
clippy_lints/src/manual_clamp.rs
View file

@ -226,7 +226,7 @@ impl TypeClampability {
} else if cx
.tcx
.get_diagnostic_item(sym::Ord)
.map_or(false, |id| implements_trait(cx, ty, id, &[]))
.is_some_and(|id| implements_trait(cx, ty, id, &[]))
{
Some(TypeClampability::Ord)
} else {

4
clippy_lints/src/manual_strip.rs
View file

@ -162,9 +162,9 @@ fn eq_pattern_length<'tcx>(cx: &LateContext<'tcx>, pattern: &Expr<'_>, expr: &'t
..
}) = expr.kind
{
constant_length(cx, pattern).map_or(false, |length| *n == length)
constant_length(cx, pattern).is_some_and(|length| *n == length)
} else {
len_arg(cx, expr).map_or(false, |arg| eq_expr_value(cx, pattern, arg))
len_arg(cx, expr).is_some_and(|arg| eq_expr_value(cx, pattern, arg))
}
}

2
clippy_lints/src/matches/match_like_matches.rs
View file

@ -74,7 +74,7 @@ where
&& b0 != b1
&& (first_guard.is_none() || iter.len() == 0)
&& first_attrs.is_empty()
&& iter.all(|arm| find_bool_lit(&arm.2.kind).map_or(false, |b| b == b0) && arm.3.is_none() && arm.0.is_empty())
&& iter.all(|arm| find_bool_lit(&arm.2.kind).is_some_and(|b| b == b0) && arm.3.is_none() && arm.0.is_empty())
{
if let Some(last_pat) = last_pat_opt {
if !is_wild(last_pat) {

2
clippy_lints/src/matches/redundant_pattern_match.rs
View file

@ -447,7 +447,7 @@ fn is_pat_variant(cx: &LateContext<'_>, pat: &Pat<'_>, path: &QPath<'_>, expecte
.tcx
.lang_items()
.get(expected_lang_item)
.map_or(false, |expected_id| cx.tcx.parent(id) == expected_id),
.is_some_and(|expected_id| cx.tcx.parent(id) == expected_id),
Item::Diag(expected_ty, expected_variant) => {
let ty = cx.typeck_results().pat_ty(pat);

2
clippy_lints/src/matches/single_match.rs
View file

@ -175,7 +175,7 @@ impl<'tcx> Visitor<'tcx> for PatVisitor<'tcx> {
if matches!(pat.kind, PatKind::Binding(..)) {
ControlFlow::Break(())
} else {
self.has_enum |= self.typeck.pat_ty(pat).ty_adt_def().map_or(false, AdtDef::is_enum);
self.has_enum |= self.typeck.pat_ty(pat).ty_adt_def().is_some_and(AdtDef::is_enum);
walk_pat(self, pat)
}
}

2
clippy_lints/src/matches/try_err.rs
View file

@ -58,7 +58,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, scrutine
let span = hygiene::walk_chain(err_arg.span, try_arg.span.ctxt());
let mut applicability = Applicability::MachineApplicable;
let origin_snippet = snippet_with_applicability(cx, span, "_", &mut applicability);
let ret_prefix = if get_parent_expr(cx, expr).map_or(false, |e| matches!(e.kind, ExprKind::Ret(_))) {
let ret_prefix = if get_parent_expr(cx, expr).is_some_and(|e| matches!(e.kind, ExprKind::Ret(_))) {
"" // already returns
} else {
"return "

2
clippy_lints/src/methods/expect_fun_call.rs
View file

@ -83,7 +83,7 @@ pub(super) fn check<'tcx>(
hir::ExprKind::MethodCall(..) => {
cx.typeck_results()
.type_dependent_def_id(arg.hir_id)
.map_or(false, |method_id| {
.is_some_and(|method_id| {
matches!(
cx.tcx.fn_sig(method_id).instantiate_identity().output().skip_binder().kind(),
ty::Ref(re, ..) if re.is_static()

7
clippy_lints/src/methods/filter_next.rs
View file

@ -32,9 +32,10 @@ pub(super) fn check<'tcx>(
filter_arg: &'tcx hir::Expr<'_>,
) {
// lint if caller of `.filter().next()` is an Iterator
let recv_impls_iterator = cx.tcx.get_diagnostic_item(sym::Iterator).map_or(false, |id| {
implements_trait(cx, cx.typeck_results().expr_ty(recv), id, &[])
});
let recv_impls_iterator = cx
.tcx
.get_diagnostic_item(sym::Iterator)
.is_some_and(|id| implements_trait(cx, cx.typeck_results().expr_ty(recv), id, &[]));
if recv_impls_iterator {
let msg = "called `filter(..).next()` on an `Iterator`. This is more succinctly expressed by calling \
`.find(..)` instead";

4
clippy_lints/src/methods/manual_next_back.rs
View file

@ -19,9 +19,7 @@ pub(super) fn check<'tcx>(
if cx
.tcx
.get_diagnostic_item(sym::DoubleEndedIterator)
.map_or(false, |double_ended_iterator| {
implements_trait(cx, rev_recv_ty, double_ended_iterator, &[])
})
.is_some_and(|double_ended_iterator| implements_trait(cx, rev_recv_ty, double_ended_iterator, &[]))
&& is_trait_method(cx, rev_call, sym::Iterator)
&& is_trait_method(cx, expr, sym::Iterator)
{

4
clippy_lints/src/methods/manual_str_repeat.rs
View file

@ -36,8 +36,8 @@ fn parse_repeat_arg(cx: &LateContext<'_>, e: &Expr<'_>) -> Option<RepeatKind> {
} else {
let ty = cx.typeck_results().expr_ty(e);
if is_type_lang_item(cx, ty, LangItem::String)
|| (is_type_lang_item(cx, ty, LangItem::OwnedBox) && get_ty_param(ty).map_or(false, Ty::is_str))
|| (is_type_diagnostic_item(cx, ty, sym::Cow) && get_ty_param(ty).map_or(false, Ty::is_str))
|| (is_type_lang_item(cx, ty, LangItem::OwnedBox) && get_ty_param(ty).is_some_and(Ty::is_str))
|| (is_type_diagnostic_item(cx, ty, sym::Cow) && get_ty_param(ty).is_some_and(Ty::is_str))
{
Some(RepeatKind::String)
} else {

2
clippy_lints/src/methods/map_clone.rs
View file

@ -70,7 +70,7 @@ pub(super) fn check(cx: &LateContext<'_>, e: &hir::Expr<'_>, recv: &hir::Expr<'_
if ident_eq(name, obj) && method.ident.name == sym::clone
&& let Some(fn_id) = cx.typeck_results().type_dependent_def_id(closure_expr.hir_id)
&& let Some(trait_id) = cx.tcx.trait_of_item(fn_id)
&& cx.tcx.lang_items().clone_trait().map_or(false, |id| id == trait_id)
&& cx.tcx.lang_items().clone_trait() == Some(trait_id)
// no autoderefs
&& !cx.typeck_results().expr_adjustments(obj).iter()
.any(|a| matches!(a.kind, Adjust::Deref(Some(..))))

32
clippy_lints/src/methods/mod.rs
View file

@ -121,6 +121,7 @@ mod unnecessary_iter_cloned;
mod unnecessary_join;
mod unnecessary_lazy_eval;
mod unnecessary_literal_unwrap;
mod unnecessary_map_or;
mod unnecessary_min_or_max;
mod unnecessary_result_map_or_else;
mod unnecessary_sort_by;
@ -4099,6 +4100,33 @@ declare_clippy_lint! {
"is_empty() called on strings known at compile time"
}
declare_clippy_lint! {
/// ### What it does
/// Converts some constructs mapping an Enum value for equality comparison.
///
/// ### Why is this bad?
/// Calls such as `opt.map_or(false, |val| val == 5)` are needlessly long and cumbersome,
/// and can be reduced to, for example, `opt == Some(5)` assuming `opt` implements `PartialEq`.
/// This lint offers readability and conciseness improvements.
///
/// ### Example
/// ```no_run
/// pub fn a(x: Option<i32>) -> bool {
/// x.map_or(false, |n| n == 5)
/// }
/// ```
/// Use instead:
/// ```no_run
/// pub fn a(x: Option<i32>) -> bool {
/// x == Some(5)
/// }
/// ```
#[clippy::version = "1.75.0"]
pub UNNECESSARY_MAP_OR,
style,
"reduce unnecessary pattern matching for constructs that implement `PartialEq`"
}
declare_clippy_lint! {
/// ### What it does
/// Checks if an iterator is used to check if a string is ascii.
@ -4417,6 +4445,7 @@ impl_lint_pass!(Methods => [
NEEDLESS_AS_BYTES,
MAP_ALL_ANY_IDENTITY,
MAP_WITH_UNUSED_ARGUMENT_OVER_RANGES,
UNNECESSARY_MAP_OR,
]);
/// Extracts a method call name, args, and `Span` of the method name.
@ -4950,6 +4979,7 @@ impl Methods {
option_map_or_none::check(cx, expr, recv, def, map);
manual_ok_or::check(cx, expr, recv, def, map);
option_map_or_err_ok::check(cx, expr, recv, def, map);
unnecessary_map_or::check(cx, expr, recv, def, map, &self.msrv);
},
("map_or_else", [def, map]) => {
result_map_or_else_none::check(cx, expr, recv, def, map);
@ -5343,7 +5373,7 @@ impl SelfKind {
boxed_ty == parent_ty
} else if is_type_diagnostic_item(cx, ty, sym::Rc) || is_type_diagnostic_item(cx, ty, sym::Arc) {
if let ty::Adt(_, args) = ty.kind() {
args.types().next().map_or(false, |t| t == parent_ty)
args.types().next() == Some(parent_ty)
} else {
false
}

2
clippy_lints/src/methods/needless_collect.rs
View file

@ -193,7 +193,7 @@ fn check_collect_into_intoiterator<'tcx>(
/// Checks if the given method call matches the expected signature of `([&[mut]] self) -> bool`
fn is_is_empty_sig(cx: &LateContext<'_>, call_id: HirId) -> bool {
cx.typeck_results().type_dependent_def_id(call_id).map_or(false, |id| {
cx.typeck_results().type_dependent_def_id(call_id).is_some_and(|id| {
let sig = cx.tcx.fn_sig(id).instantiate_identity().skip_binder();
sig.inputs().len() == 1 && sig.output().is_bool()
})

2
clippy_lints/src/methods/option_as_ref_deref.rs
View file

@ -45,7 +45,7 @@ pub(super) fn check(
hir::ExprKind::Path(ref expr_qpath) => {
cx.qpath_res(expr_qpath, map_arg.hir_id)
.opt_def_id()
.map_or(false, |fun_def_id| {
.is_some_and(|fun_def_id| {
cx.tcx.is_diagnostic_item(sym::deref_method, fun_def_id)
|| cx.tcx.is_diagnostic_item(sym::deref_mut_method, fun_def_id)
|| deref_aliases

4
clippy_lints/src/methods/or_fun_call.rs
View file

@ -59,9 +59,7 @@ pub(super) fn check<'tcx>(
let output_ty = cx.tcx.fn_sig(def_id).instantiate(cx.tcx, args).skip_binder().output();
cx.tcx
.get_diagnostic_item(sym::Default)
.map_or(false, |default_trait_id| {
implements_trait(cx, output_ty, default_trait_id, &[])
})
.is_some_and(|default_trait_id| implements_trait(cx, output_ty, default_trait_id, &[]))
} else {
false
}

2
clippy_lints/src/methods/str_splitn.rs
View file

@ -348,7 +348,7 @@ fn parse_iter_usage<'tcx>(
&& cx
.typeck_results()
.type_dependent_def_id(e.hir_id)
.map_or(false, |id| is_diag_item_method(cx, id, sym::Option)) =>
.is_some_and(|id| is_diag_item_method(cx, id, sym::Option)) =>
{
(Some(UnwrapKind::Unwrap), e.span)
},

131
clippy_lints/src/methods/unnecessary_map_or.rs Normal file
View file

@ -0,0 +1,131 @@
use std::borrow::Cow;
use clippy_config::msrvs::{self, Msrv};
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::eager_or_lazy::switch_to_eager_eval;
use clippy_utils::source::snippet_opt;
use clippy_utils::sugg::{Sugg, make_binop};
use clippy_utils::ty::{get_type_diagnostic_name, implements_trait};
use clippy_utils::visitors::is_local_used;
use clippy_utils::{is_from_proc_macro, path_to_local_id};
use rustc_ast::LitKind::Bool;
use rustc_errors::Applicability;
use rustc_hir::{BinOpKind, Expr, ExprKind, PatKind};
use rustc_lint::LateContext;
use rustc_span::sym;
use super::UNNECESSARY_MAP_OR;
pub(super) enum Variant {
Ok,
Some,
}
impl Variant {
pub fn variant_name(&self) -> &'static str {
match self {
Variant::Ok => "Ok",
Variant::Some => "Some",
}
}
pub fn method_name(&self) -> &'static str {
match self {
Variant::Ok => "is_ok_and",
Variant::Some => "is_some_and",
}
}
}
pub(super) fn check<'a>(
cx: &LateContext<'a>,
expr: &Expr<'a>,
recv: &Expr<'_>,
def: &Expr<'_>,
map: &Expr<'_>,
msrv: &Msrv,
) {
let ExprKind::Lit(def_kind) = def.kind else {
return;
};
let recv_ty = cx.typeck_results().expr_ty(recv);
let Bool(def_bool) = def_kind.node else {
return;
};
let variant = match get_type_diagnostic_name(cx, recv_ty) {
Some(sym::Option) => Variant::Some,
Some(sym::Result) => Variant::Ok,
Some(_) | None => return,
};
let (sugg, method) = if let ExprKind::Closure(map_closure) = map.kind
&& let closure_body = cx.tcx.hir().body(map_closure.body)
&& let closure_body_value = closure_body.value.peel_blocks()
&& let ExprKind::Binary(op, l, r) = closure_body_value.kind
&& let Some(param) = closure_body.params.first()
&& let PatKind::Binding(_, hir_id, _, _) = param.pat.kind
// checking that map_or is one of the following:
// .map_or(false, |x| x == y)
// .map_or(false, |x| y == x) - swapped comparison
// .map_or(true, |x| x != y)
// .map_or(true, |x| y != x) - swapped comparison
&& ((BinOpKind::Eq == op.node && !def_bool) || (BinOpKind::Ne == op.node && def_bool))
&& let non_binding_location = if path_to_local_id(l, hir_id) { r } else { l }
&& switch_to_eager_eval(cx, non_binding_location)
// xor, because if its both then thats a strange edge case and
// we can just ignore it, since by default clippy will error on this
&& (path_to_local_id(l, hir_id) ^ path_to_local_id(r, hir_id))
&& !is_local_used(cx, non_binding_location, hir_id)
&& let typeck_results = cx.typeck_results()
&& typeck_results.expr_ty(l) == typeck_results.expr_ty(r)
&& let Some(partial_eq) = cx.tcx.get_diagnostic_item(sym::PartialEq)
&& implements_trait(cx, recv_ty, partial_eq, &[recv_ty.into()])
{
let wrap = variant.variant_name();
// we may need to add parens around the suggestion
// in case the parent expression has additional method calls,
// since for example `Some(5).map_or(false, |x| x == 5).then(|| 1)`
// being converted to `Some(5) == Some(5).then(|| 1)` isnt
// the same thing
let inner_non_binding = Sugg::NonParen(Cow::Owned(format!(
"{wrap}({})",
Sugg::hir(cx, non_binding_location, "")
)));
let binop = make_binop(op.node, &Sugg::hir(cx, recv, ".."), &inner_non_binding)
.maybe_par()
.into_string();
(binop, "a standard comparison")
} else if !def_bool
&& msrv.meets(msrvs::OPTION_RESULT_IS_VARIANT_AND)
&& let Some(recv_callsite) = snippet_opt(cx, recv.span.source_callsite())
&& let Some(span_callsite) = snippet_opt(cx, map.span.source_callsite())
{
let suggested_name = variant.method_name();
(
format!("{recv_callsite}.{suggested_name}({span_callsite})",),
suggested_name,
)
} else {
return;
};
if is_from_proc_macro(cx, expr) {
return;
}
span_lint_and_sugg(
cx,
UNNECESSARY_MAP_OR,
expr.span,
"this `map_or` is redundant",
format!("use {method} instead"),
sugg,
Applicability::MaybeIncorrect,
);
}

7
clippy_lints/src/methods/unnecessary_sort_by.rs
View file

@ -167,9 +167,10 @@ fn detect_lint(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, arg: &Exp
},
)) = &left_expr.kind
&& left_name == left_ident
&& cx.tcx.get_diagnostic_item(sym::Ord).map_or(false, |id| {
implements_trait(cx, cx.typeck_results().expr_ty(left_expr), id, &[])
})
&& cx
.tcx
.get_diagnostic_item(sym::Ord)
.is_some_and(|id| implements_trait(cx, cx.typeck_results().expr_ty(left_expr), id, &[]))
{
return Some(LintTrigger::Sort(SortDetection { vec_name }));
}

2
clippy_lints/src/methods/useless_asref.rs
View file

@ -124,7 +124,7 @@ fn is_calling_clone(cx: &LateContext<'_>, arg: &hir::Expr<'_>) -> bool {
&& let Some(fn_id) = cx.typeck_results().type_dependent_def_id(closure_expr.hir_id)
&& let Some(trait_id) = cx.tcx.trait_of_item(fn_id)
// We check it's the `Clone` trait.
&& cx.tcx.lang_items().clone_trait().map_or(false, |id| id == trait_id)
&& cx.tcx.lang_items().clone_trait().is_some_and(|id| id == trait_id)
// no autoderefs
&& !cx.typeck_results().expr_adjustments(obj).iter()
.any(|a| matches!(a.kind, Adjust::Deref(Some(..))))

2
clippy_lints/src/misc_early/mod.rs
View file

@ -427,7 +427,7 @@ impl MiscEarlyLints {
// See <https://github.com/rust-lang/rust-clippy/issues/4507> for a regression.
// FIXME: Find a better way to detect those cases.
let lit_snip = match snippet_opt(cx, span) {
Some(snip) if snip.chars().next().map_or(false, |c| c.is_ascii_digit()) => snip,
Some(snip) if snip.chars().next().is_some_and(|c| c.is_ascii_digit()) => snip,
_ => return,
};

10
clippy_lints/src/needless_borrows_for_generic_args.rs
View file

@ -134,9 +134,11 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessBorrowsForGenericArgs<'tcx> {
}
fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &Body<'_>) {
if self.possible_borrowers.last().map_or(false, |&(local_def_id, _)| {
local_def_id == cx.tcx.hir().body_owner_def_id(body.id())
}) {
if self
.possible_borrowers
.last()
.is_some_and(|&(local_def_id, _)| local_def_id == cx.tcx.hir().body_owner_def_id(body.id()))
{
self.possible_borrowers.pop();
}
}
@ -232,7 +234,7 @@ fn needless_borrow_count<'tcx>(
let mut check_reference_and_referent = |reference: &Expr<'tcx>, referent: &Expr<'tcx>| {
if let ExprKind::Field(base, _) = &referent.kind {
let base_ty = cx.typeck_results().expr_ty(base);
if drop_trait_def_id.map_or(false, |id| implements_trait(cx, base_ty, id, &[])) {
if drop_trait_def_id.is_some_and(|id| implements_trait(cx, base_ty, id, &[])) {
return false;
}
}

4
clippy_lints/src/needless_continue.rs
View file

@ -153,7 +153,7 @@ fn needless_continue_in_else(else_expr: &ast::Expr, label: Option<&ast::Label>)
}
fn is_first_block_stmt_continue(block: &ast::Block, label: Option<&ast::Label>) -> bool {
block.stmts.first().map_or(false, |stmt| match stmt.kind {
block.stmts.first().is_some_and(|stmt| match stmt.kind {
ast::StmtKind::Semi(ref e) | ast::StmtKind::Expr(ref e) => {
if let ast::ExprKind::Continue(ref l) = e.kind {
compare_labels(label, l.as_ref())
@ -390,7 +390,7 @@ fn check_and_warn(cx: &EarlyContext<'_>, expr: &ast::Expr) {
#[must_use]
fn erode_from_back(s: &str) -> String {
let mut ret = s.to_string();
while ret.pop().map_or(false, |c| c != '}') {}
while ret.pop().is_some_and(|c| c != '}') {}
while let Some(c) = ret.pop() {
if !c.is_whitespace() {
ret.push(c);

2
clippy_lints/src/nonstandard_macro_braces.rs
View file

@ -88,7 +88,7 @@ fn is_offending_macro(cx: &EarlyContext<'_>, span: Span, mac_braces: &MacroBrace
|| span
.macro_backtrace()
.last()
.map_or(false, |e| e.macro_def_id.map_or(false, DefId::is_local))
.is_some_and(|e| e.macro_def_id.is_some_and(DefId::is_local))
};
let span_call_site = span.ctxt().outer_expn_data().call_site;
if let ExpnKind::Macro(MacroKind::Bang, mac_name) = span.ctxt().outer_expn_data().kind

4
clippy_lints/src/only_used_in_recursion.rs
View file

@ -290,7 +290,7 @@ impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion {
Some((Node::Expr(parent), child_id)) => match parent.kind {
// Recursive call. Track which index the parameter is used in.
ExprKind::Call(callee, args)
if path_def_id(cx, callee).map_or(false, |id| {
if path_def_id(cx, callee).is_some_and(|id| {
id == param.fn_id && has_matching_args(param.fn_kind, typeck.node_args(callee.hir_id))
}) =>
{
@ -300,7 +300,7 @@ impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion {
return;
},
ExprKind::MethodCall(_, receiver, args, _)
if typeck.type_dependent_def_id(parent.hir_id).map_or(false, |id| {
if typeck.type_dependent_def_id(parent.hir_id).is_some_and(|id| {
id == param.fn_id && has_matching_args(param.fn_kind, typeck.node_args(parent.hir_id))
}) =>
{

2
clippy_lints/src/operators/arithmetic_side_effects.rs
View file

@ -325,7 +325,7 @@ impl ArithmeticSideEffects {
fn should_skip_expr<'tcx>(&mut self, cx: &LateContext<'tcx>, expr: &hir::Expr<'tcx>) -> bool {
is_lint_allowed(cx, ARITHMETIC_SIDE_EFFECTS, expr.hir_id)
|| self.expr_span.is_some()
|| self.const_span.map_or(false, |sp| sp.contains(expr.span))
|| self.const_span.is_some_and(|sp| sp.contains(expr.span))
}
}

6
clippy_lints/src/operators/cmp_owned.rs
View file

@ -42,14 +42,12 @@ fn check_op(cx: &LateContext<'_>, expr: &Expr<'_>, other: &Expr<'_>, left: bool)
if typeck
.type_dependent_def_id(expr.hir_id)
.and_then(|id| cx.tcx.trait_of_item(id))
.map_or(false, |id| {
matches!(cx.tcx.get_diagnostic_name(id), Some(sym::ToString | sym::ToOwned))
}) =>
.is_some_and(|id| matches!(cx.tcx.get_diagnostic_name(id), Some(sym::ToString | sym::ToOwned))) =>
{
(arg, arg.span)
},
ExprKind::Call(path, [arg])
if path_def_id(cx, path).map_or(false, |did| {
if path_def_id(cx, path).is_some_and(|did| {
if cx.tcx.is_diagnostic_item(sym::from_str_method, did) {
true
} else if cx.tcx.is_diagnostic_item(sym::from_fn, did) {

2
clippy_lints/src/operators/numeric_arithmetic.rs
View file

@ -14,7 +14,7 @@ pub struct Context {
}
impl Context {
fn skip_expr(&mut self, e: &hir::Expr<'_>) -> bool {
self.expr_id.is_some() || self.const_span.map_or(false, |span| span.contains(e.span))
self.expr_id.is_some() || self.const_span.is_some_and(|span| span.contains(e.span))
}
pub fn check_binary<'tcx>(

2
clippy_lints/src/pass_by_ref_or_value.rs
View file

@ -192,7 +192,7 @@ impl PassByRefOrValue {
continue;
}
}
let value_type = if fn_body.and_then(|body| body.params.get(index)).map_or(false, is_self) {
let value_type = if fn_body.and_then(|body| body.params.get(index)).is_some_and(is_self) {
"self".into()
} else {
snippet(cx, decl_ty.span, "_").into()

5
clippy_lints/src/ptr.rs
View file

@ -727,9 +727,8 @@ fn get_ref_lm<'tcx>(ty: &'tcx hir::Ty<'tcx>) -> Option<(&'tcx Lifetime, Mutabili
fn is_null_path(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
if let ExprKind::Call(pathexp, []) = expr.kind {
path_def_id(cx, pathexp).map_or(false, |id| {
matches!(cx.tcx.get_diagnostic_name(id), Some(sym::ptr_null | sym::ptr_null_mut))
})
path_def_id(cx, pathexp)
.is_some_and(|id| matches!(cx.tcx.get_diagnostic_name(id), Some(sym::ptr_null | sym::ptr_null_mut)))
} else {
false
}

2
clippy_lints/src/question_mark.rs
View file

@ -129,7 +129,7 @@ fn check_let_some_else_return_none(cx: &LateContext<'_>, stmt: &Stmt<'_>) {
cx.tcx
.lang_items()
.try_trait()
.map_or(false, |did| implements_trait(cx, init_ty, did, &[]))
.is_some_and(|did| implements_trait(cx, init_ty, did, &[]))
}
if let StmtKind::Let(LetStmt {

4
clippy_lints/src/redundant_slicing.rs
View file

@ -85,7 +85,7 @@ impl<'tcx> LateLintPass<'tcx> for RedundantSlicing {
let (expr_ty, expr_ref_count) = peel_middle_ty_refs(cx.typeck_results().expr_ty(expr));
let (indexed_ty, indexed_ref_count) = peel_middle_ty_refs(cx.typeck_results().expr_ty(indexed));
let parent_expr = get_parent_expr(cx, expr);
let needs_parens_for_prefix = parent_expr.map_or(false, |parent| parent.precedence().order() > PREC_PREFIX);
let needs_parens_for_prefix = parent_expr.is_some_and(|parent| parent.precedence().order() > PREC_PREFIX);
if expr_ty == indexed_ty {
if expr_ref_count > indexed_ref_count {
@ -107,7 +107,7 @@ impl<'tcx> LateLintPass<'tcx> for RedundantSlicing {
kind: ExprKind::AddrOf(BorrowKind::Ref, Mutability::Mut, _),
..
})
) || cx.typeck_results().expr_adjustments(expr).first().map_or(false, |a| {
) || cx.typeck_results().expr_adjustments(expr).first().is_some_and(|a| {
matches!(
a.kind,
Adjust::Borrow(AutoBorrow::Ref(AutoBorrowMutability::Mut { .. }))

4
clippy_lints/src/swap.rs
View file

@ -412,9 +412,7 @@ impl<'tcx> IndexBinding<'_, 'tcx> {
}
Self::is_used_slice_indexed(lhs, idx_ident) || Self::is_used_slice_indexed(rhs, idx_ident)
},
ExprKind::Path(QPath::Resolved(_, path)) => {
path.segments.first().map_or(false, |idx| idx.ident == idx_ident)
},
ExprKind::Path(QPath::Resolved(_, path)) => path.segments.first().is_some_and(|idx| idx.ident == idx_ident),
_ => false,
}
}

3
clippy_lints/src/types/borrowed_box.rs
View file

@ -51,8 +51,7 @@ pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, lt: &Lifetime, m
format!("&{ltopt}({inner_snippet})")
},
TyKind::Path(qpath)
if get_bounds_if_impl_trait(cx, qpath, inner.hir_id)
.map_or(false, |bounds| bounds.len() > 1) =>
if get_bounds_if_impl_trait(cx, qpath, inner.hir_id).is_some_and(|bounds| bounds.len() > 1) =>
{
format!("&{ltopt}({inner_snippet})")
},

2
clippy_lints/src/unit_types/let_unit_value.rs
View file

@ -38,7 +38,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, local: &'tcx LetStmt<'_>) {
return;
}
if (local.ty.map_or(false, |ty| !matches!(ty.kind, TyKind::Infer))
if (local.ty.is_some_and(|ty| !matches!(ty.kind, TyKind::Infer))
|| matches!(local.pat.kind, PatKind::Tuple([], ddpos) if ddpos.as_opt_usize().is_none()))
&& expr_needs_inferred_result(cx, init)
{

2
clippy_lints/src/vec_init_then_push.rs
View file

@ -98,7 +98,7 @@ impl VecPushSearcher {
needs_mut |= cx.typeck_results().expr_ty_adjusted(last_place).ref_mutability()
== Some(Mutability::Mut)
|| get_parent_expr(cx, last_place)
.map_or(false, |e| matches!(e.kind, ExprKind::AddrOf(_, Mutability::Mut, _)));
.is_some_and(|e| matches!(e.kind, ExprKind::AddrOf(_, Mutability::Mut, _)));
},
ExprKind::MethodCall(_, recv, ..)
if recv.hir_id == e.hir_id

2
clippy_lints/src/write.rs
View file

@ -295,7 +295,7 @@ impl<'tcx> LateLintPass<'tcx> for Write {
.opts
.crate_name
.as_ref()
.map_or(false, |crate_name| crate_name == "build_script_build");
.is_some_and(|crate_name| crate_name == "build_script_build");
let allowed_in_tests = self.allow_print_in_tests && is_in_test(cx.tcx, expr.hir_id);
match diag_name {

6
clippy_utils/src/check_proc_macro.rs
View file

@ -51,7 +51,7 @@ fn span_matches_pat(sess: &Session, span: Span, start_pat: Pat, end_pat: Pat) ->
return false;
};
let end = span.hi() - pos.sf.start_pos;
src.get(pos.pos.0 as usize..end.0 as usize).map_or(false, |s| {
src.get(pos.pos.0 as usize..end.0 as usize).is_some_and(|s| {
// Spans can be wrapped in a mixture or parenthesis, whitespace, and trailing commas.
let start_str = s.trim_start_matches(|c: char| c.is_whitespace() || c == '(');
let end_str = s.trim_end_matches(|c: char| c.is_whitespace() || c == ')' || c == ',');
@ -60,13 +60,13 @@ fn span_matches_pat(sess: &Session, span: Span, start_pat: Pat, end_pat: Pat) ->
Pat::MultiStr(texts) => texts.iter().any(|s| start_str.starts_with(s)),
Pat::OwnedMultiStr(texts) => texts.iter().any(|s| start_str.starts_with(s)),
Pat::Sym(sym) => start_str.starts_with(sym.as_str()),
Pat::Num => start_str.as_bytes().first().map_or(false, u8::is_ascii_digit),
Pat::Num => start_str.as_bytes().first().is_some_and(u8::is_ascii_digit),
} && match end_pat {
Pat::Str(text) => end_str.ends_with(text),
Pat::MultiStr(texts) => texts.iter().any(|s| end_str.ends_with(s)),
Pat::OwnedMultiStr(texts) => texts.iter().any(|s| end_str.ends_with(s)),
Pat::Sym(sym) => end_str.ends_with(sym.as_str()),
Pat::Num => end_str.as_bytes().last().map_or(false, u8::is_ascii_hexdigit),
Pat::Num => end_str.as_bytes().last().is_some_and(u8::is_ascii_hexdigit),
})
})
}

8
clippy_utils/src/hir_utils.rs
View file

@ -258,7 +258,7 @@ impl HirEqInterExpr<'_, '_, '_> {
}
fn should_ignore(&mut self, expr: &Expr<'_>) -> bool {
macro_backtrace(expr.span).last().map_or(false, |macro_call| {
macro_backtrace(expr.span).last().is_some_and(|macro_call| {
matches!(
&self.inner.cx.tcx.get_diagnostic_name(macro_call.def_id),
Some(sym::todo_macro | sym::unimplemented_macro)
@ -322,7 +322,7 @@ impl HirEqInterExpr<'_, '_, '_> {
(&ExprKind::Block(l, _), &ExprKind::Block(r, _)) => self.eq_block(l, r),
(&ExprKind::Binary(l_op, ll, lr), &ExprKind::Binary(r_op, rl, rr)) => {
l_op.node == r_op.node && self.eq_expr(ll, rl) && self.eq_expr(lr, rr)
|| swap_binop(l_op.node, ll, lr).map_or(false, |(l_op, ll, lr)| {
|| swap_binop(l_op.node, ll, lr).is_some_and(|(l_op, ll, lr)| {
l_op == r_op.node && self.eq_expr(ll, rl) && self.eq_expr(lr, rr)
})
},
@ -444,7 +444,7 @@ impl HirEqInterExpr<'_, '_, '_> {
) => false,
};
(is_eq && (!self.should_ignore(left) || !self.should_ignore(right)))
|| self.inner.expr_fallback.as_mut().map_or(false, |f| f(left, right))
|| self.inner.expr_fallback.as_mut().is_some_and(|f| f(left, right))
}
fn eq_exprs(&mut self, left: &[Expr<'_>], right: &[Expr<'_>]) -> bool {
@ -724,7 +724,7 @@ fn swap_binop<'a>(
/// `eq_fn`.
pub fn both<X>(l: Option<&X>, r: Option<&X>, mut eq_fn: impl FnMut(&X, &X) -> bool) -> bool {
l.as_ref()
.map_or_else(|| r.is_none(), |x| r.as_ref().map_or(false, |y| eq_fn(x, y)))
.map_or_else(|| r.is_none(), |x| r.as_ref().is_some_and(|y| eq_fn(x, y)))
}
/// Checks if two slices are equal as per `eq_fn`.

31
clippy_utils/src/lib.rs
View file

@ -342,10 +342,9 @@ pub fn is_ty_alias(qpath: &QPath<'_>) -> bool {
/// Checks if the method call given in `expr` belongs to the given trait.
/// This is a deprecated function, consider using [`is_trait_method`].
pub fn match_trait_method(cx: &LateContext<'_>, expr: &Expr<'_>, path: &[&str]) -> bool {
cx.typeck_results()
.type_dependent_def_id(expr.hir_id)
.and_then(|defid| cx.tcx.trait_of_item(defid))
.map_or(false, |trt_id| match_def_path(cx, trt_id, path))
let def_id = cx.typeck_results().type_dependent_def_id(expr.hir_id).unwrap();
let trt_id = cx.tcx.trait_of_item(def_id);
trt_id.is_some_and(|trt_id| match_def_path(cx, trt_id, path))
}
/// Checks if the given method call expression calls an inherent method.
@ -379,7 +378,7 @@ pub fn is_diag_trait_item(cx: &LateContext<'_>, def_id: DefId, diag_item: Symbol
pub fn is_trait_method(cx: &LateContext<'_>, expr: &Expr<'_>, diag_item: Symbol) -> bool {
cx.typeck_results()
.type_dependent_def_id(expr.hir_id)
.map_or(false, |did| is_diag_trait_item(cx, did, diag_item))
.is_some_and(|did| is_diag_trait_item(cx, did, diag_item))
}
/// Checks if the `def_id` belongs to a function that is part of a trait impl.
@ -406,7 +405,7 @@ pub fn is_trait_item(cx: &LateContext<'_>, expr: &Expr<'_>, diag_item: Symbol) -
if let ExprKind::Path(ref qpath) = expr.kind {
cx.qpath_res(qpath, expr.hir_id)
.opt_def_id()
.map_or(false, |def_id| is_diag_trait_item(cx, def_id, diag_item))
.is_some_and(|def_id| is_diag_trait_item(cx, def_id, diag_item))
} else {
false
}
@ -466,13 +465,13 @@ pub fn match_qpath(path: &QPath<'_>, segments: &[&str]) -> bool {
///
/// Please use `is_path_diagnostic_item` if the target is a diagnostic item.
pub fn is_expr_path_def_path(cx: &LateContext<'_>, expr: &Expr<'_>, segments: &[&str]) -> bool {
path_def_id(cx, expr).map_or(false, |id| match_def_path(cx, id, segments))
path_def_id(cx, expr).is_some_and(|id| match_def_path(cx, id, segments))
}
/// If `maybe_path` is a path node which resolves to an item, resolves it to a `DefId` and checks if
/// it matches the given lang item.
pub fn is_path_lang_item<'tcx>(cx: &LateContext<'_>, maybe_path: &impl MaybePath<'tcx>, lang_item: LangItem) -> bool {
path_def_id(cx, maybe_path).map_or(false, |id| cx.tcx.lang_items().get(lang_item) == Some(id))
path_def_id(cx, maybe_path).is_some_and(|id| cx.tcx.lang_items().get(lang_item) == Some(id))
}
/// If `maybe_path` is a path node which resolves to an item, resolves it to a `DefId` and checks if
@ -482,7 +481,7 @@ pub fn is_path_diagnostic_item<'tcx>(
maybe_path: &impl MaybePath<'tcx>,
diag_item: Symbol,
) -> bool {
path_def_id(cx, maybe_path).map_or(false, |id| cx.tcx.is_diagnostic_item(diag_item, id))
path_def_id(cx, maybe_path).is_some_and(|id| cx.tcx.is_diagnostic_item(diag_item, id))
}
/// THIS METHOD IS DEPRECATED. Matches a `Path` against a slice of segment string literals.
@ -1315,7 +1314,7 @@ pub fn method_chain_args<'a>(expr: &'a Expr<'_>, methods: &[&str]) -> Option<Vec
pub fn is_entrypoint_fn(cx: &LateContext<'_>, def_id: DefId) -> bool {
cx.tcx
.entry_fn(())
.map_or(false, |(entry_fn_def_id, _)| def_id == entry_fn_def_id)
.is_some_and(|(entry_fn_def_id, _)| def_id == entry_fn_def_id)
}
/// Returns `true` if the expression is in the program's `#[panic_handler]`.
@ -1753,8 +1752,8 @@ pub fn is_refutable(cx: &LateContext<'_>, pat: &Pat<'_>) -> bool {
match pat.kind {
PatKind::Wild | PatKind::Never => false, // If `!` typechecked then the type is empty, so not refutable.
PatKind::Binding(_, _, _, pat) => pat.map_or(false, |pat| is_refutable(cx, pat)),
PatKind::Box(pat) | PatKind::Deref(pat) | PatKind::Ref(pat, _) => is_refutable(cx, pat),
PatKind::Binding(_, _, _, pat) => pat.is_some_and(|pat| is_refutable(cx, pat)),
PatKind::Box(pat) | PatKind::Ref(pat, _) => is_refutable(cx, pat),
PatKind::Path(ref qpath) => is_enum_variant(cx, qpath, pat.hir_id),
PatKind::Or(pats) => {
// TODO: should be the honest check, that pats is exhaustive set
@ -1778,7 +1777,7 @@ pub fn is_refutable(cx: &LateContext<'_>, pat: &Pat<'_>) -> bool {
},
}
},
PatKind::Lit(..) | PatKind::Range(..) | PatKind::Err(_) => true,
PatKind::Lit(..) | PatKind::Range(..) | PatKind::Err(_) | PatKind::Deref(_) => true,
}
}
@ -2021,7 +2020,7 @@ pub fn match_libc_symbol(cx: &LateContext<'_>, did: DefId, name: &str) -> bool {
let path = cx.get_def_path(did);
// libc is meant to be used as a flat list of names, but they're all actually defined in different
// modules based on the target platform. Ignore everything but crate name and the item name.
path.first().map_or(false, |s| s.as_str() == "libc") && path.last().map_or(false, |s| s.as_str() == name)
path.first().is_some_and(|s| s.as_str() == "libc") && path.last().is_some_and(|s| s.as_str() == name)
}
/// Returns the list of condition expressions and the list of blocks in a
@ -2104,7 +2103,7 @@ pub fn is_must_use_func_call(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
_ => None,
};
did.map_or(false, |did| cx.tcx.has_attr(did, sym::must_use))
did.is_some_and(|did| cx.tcx.has_attr(did, sym::must_use))
}
/// Checks if a function's body represents the identity function. Looks for bodies of the form:
@ -2211,7 +2210,7 @@ pub fn is_expr_untyped_identity_function(cx: &LateContext<'_>, expr: &Expr<'_>)
pub fn is_expr_identity_function(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
match expr.kind {
ExprKind::Closure(&Closure { body, .. }) => is_body_identity_function(cx, cx.tcx.hir().body(body)),
_ => path_def_id(cx, expr).map_or(false, |id| cx.tcx.is_diagnostic_item(sym::convert_identity, id)),
_ => path_def_id(cx, expr).is_some_and(|id| cx.tcx.is_diagnostic_item(sym::convert_identity, id)),
}
}

2
clippy_utils/src/numeric_literal.rs
View file

@ -53,7 +53,7 @@ impl<'a> NumericLiteral<'a> {
.trim_start()
.chars()
.next()
.map_or(false, |c| c.is_ascii_digit())
.is_some_and(|c| c.is_ascii_digit())
{
let (unsuffixed, suffix) = split_suffix(src, lit_kind);
let float = matches!(lit_kind, LitKind::Float(..));

2
clippy_utils/src/sugg.rs
View file

@ -905,7 +905,7 @@ impl<'tcx> DerefDelegate<'_, 'tcx> {
_ => return false,
};
ty.map_or(false, |ty| matches!(ty.kind(), ty::Ref(_, inner, _) if inner.is_ref()))
ty.is_some_and(|ty| matches!(ty.kind(), ty::Ref(_, inner, _) if inner.is_ref()))
}
}

12
clippy_utils/src/ty.rs
View file

@ -45,7 +45,7 @@ pub fn is_copy<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool {
pub fn has_debug_impl<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool {
cx.tcx
.get_diagnostic_item(sym::Debug)
.map_or(false, |debug| implements_trait(cx, ty, debug, &[]))
.is_some_and(|debug| implements_trait(cx, ty, debug, &[]))
}
/// Checks whether a type can be partially moved.
@ -487,7 +487,7 @@ pub fn needs_ordered_drop<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool {
.tcx
.lang_items()
.drop_trait()
.map_or(false, |id| implements_trait(cx, ty, id, &[]))
.is_some_and(|id| implements_trait(cx, ty, id, &[]))
{
// This type doesn't implement drop, so no side effects here.
// Check if any component type has any.
@ -718,7 +718,7 @@ pub fn ty_sig<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<ExprFnSig<'t
{
let output = bounds
.projection_bounds()
.find(|p| lang_items.fn_once_output().map_or(false, |id| id == p.item_def_id()))
.find(|p| lang_items.fn_once_output().is_some_and(|id| id == p.item_def_id()))
.map(|p| p.map_bound(|p| p.term.expect_type()));
Some(ExprFnSig::Trait(bound.map_bound(|b| b.args.type_at(0)), output, None))
},
@ -753,7 +753,7 @@ fn sig_from_bounds<'tcx>(
&& p.self_ty() == ty =>
{
let i = pred.kind().rebind(p.trait_ref.args.type_at(1));
if inputs.map_or(false, |inputs| i != inputs) {
if inputs.is_some_and(|inputs| i != inputs) {
// Multiple different fn trait impls. Is this even allowed?
return None;
}
@ -794,7 +794,7 @@ fn sig_for_projection<'tcx>(cx: &LateContext<'tcx>, ty: AliasTy<'tcx>) -> Option
{
let i = pred.kind().rebind(p.trait_ref.args.type_at(1));
if inputs.map_or(false, |inputs| inputs != i) {
if inputs.is_some_and(|inputs| inputs != i) {
// Multiple different fn trait impls. Is this even allowed?
return None;
}
@ -1291,7 +1291,7 @@ pub fn normalize_with_regions<'tcx>(tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>
/// Checks if the type is `core::mem::ManuallyDrop<_>`
pub fn is_manually_drop(ty: Ty<'_>) -> bool {
ty.ty_adt_def().map_or(false, AdtDef::is_manually_drop)
ty.ty_adt_def().is_some_and(AdtDef::is_manually_drop)
}
/// Returns the deref chain of a type, starting with the type itself.

10
clippy_utils/src/visitors.rs
View file

@ -344,13 +344,13 @@ pub fn is_const_evaluatable<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) ->
.cx
.qpath_res(p, hir_id)
.opt_def_id()
.map_or(false, |id| self.cx.tcx.is_const_fn(id)) => {},
.is_some_and(|id| self.cx.tcx.is_const_fn(id)) => {},
ExprKind::MethodCall(..)
if self
.cx
.typeck_results()
.type_dependent_def_id(e.hir_id)
.map_or(false, |id| self.cx.tcx.is_const_fn(id)) => {},
.is_some_and(|id| self.cx.tcx.is_const_fn(id)) => {},
ExprKind::Binary(_, lhs, rhs)
if self.cx.typeck_results().expr_ty(lhs).peel_refs().is_primitive_ty()
&& self.cx.typeck_results().expr_ty(rhs).peel_refs().is_primitive_ty() => {},
@ -426,9 +426,7 @@ pub fn is_expr_unsafe<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> bool {
.cx
.typeck_results()
.type_dependent_def_id(e.hir_id)
.map_or(false, |id| {
self.cx.tcx.fn_sig(id).skip_binder().safety() == Safety::Unsafe
}) =>
.is_some_and(|id| self.cx.tcx.fn_sig(id).skip_binder().safety() == Safety::Unsafe) =>
{
ControlFlow::Break(())
},
@ -444,7 +442,7 @@ pub fn is_expr_unsafe<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> bool {
.cx
.qpath_res(p, e.hir_id)
.opt_def_id()
.map_or(false, |id| self.cx.tcx.is_mutable_static(id)) =>
.is_some_and(|id| self.cx.tcx.is_mutable_static(id)) =>
{
ControlFlow::Break(())
},

1
tests/ui-internal/unnecessary_def_path.fixed
View file

@ -1,6 +1,7 @@
//@aux-build:paths.rs
#![deny(clippy::internal)]
#![feature(rustc_private)]
#![allow(clippy::unnecessary_map_or)]
extern crate clippy_utils;
extern crate paths;

1
tests/ui-internal/unnecessary_def_path.rs
View file

@ -1,6 +1,7 @@
//@aux-build:paths.rs
#![deny(clippy::internal)]
#![feature(rustc_private)]
#![allow(clippy::unnecessary_map_or)]
extern crate clippy_utils;
extern crate paths;

30
tests/ui-internal/unnecessary_def_path.stderr
View file

@ -1,5 +1,5 @@
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:36:13
--> tests/ui-internal/unnecessary_def_path.rs:37:13
|
LL | let _ = match_type(cx, ty, &OPTION);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::Option)`
@ -12,61 +12,61 @@ LL | #![deny(clippy::internal)]
= note: `#[deny(clippy::unnecessary_def_path)]` implied by `#[deny(clippy::internal)]`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:37:13
--> tests/ui-internal/unnecessary_def_path.rs:38:13
|
LL | let _ = match_type(cx, ty, RESULT);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::Result)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:38:13
--> tests/ui-internal/unnecessary_def_path.rs:39:13
|
LL | let _ = match_type(cx, ty, &["core", "result", "Result"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::Result)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:42:13
--> tests/ui-internal/unnecessary_def_path.rs:43:13
|
LL | let _ = clippy_utils::ty::match_type(cx, ty, rc_path);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::Rc)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:44:13
--> tests/ui-internal/unnecessary_def_path.rs:45:13
|
LL | let _ = match_type(cx, ty, &paths::OPTION);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::Option)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:45:13
--> tests/ui-internal/unnecessary_def_path.rs:46:13
|
LL | let _ = match_type(cx, ty, paths::RESULT);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::Result)`
error: use of a def path to a `LangItem`
--> tests/ui-internal/unnecessary_def_path.rs:47:13
--> tests/ui-internal/unnecessary_def_path.rs:48:13
|
LL | let _ = match_type(cx, ty, &["alloc", "boxed", "Box"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_lang_item(cx, ty, LangItem::OwnedBox)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:48:13
--> tests/ui-internal/unnecessary_def_path.rs:49:13
|
LL | let _ = match_type(cx, ty, &["core", "mem", "maybe_uninit", "MaybeUninit", "uninit"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_type_diagnostic_item(cx, ty, sym::maybe_uninit_uninit)`
error: use of a def path to a `LangItem`
--> tests/ui-internal/unnecessary_def_path.rs:50:13
--> tests/ui-internal/unnecessary_def_path.rs:51:13
|
LL | let _ = match_def_path(cx, did, &["alloc", "boxed", "Box"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `cx.tcx.lang_items().get(LangItem::OwnedBox) == Some(did)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:51:13
--> tests/ui-internal/unnecessary_def_path.rs:52:13
|
LL | let _ = match_def_path(cx, did, &["core", "option", "Option"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `cx.tcx.is_diagnostic_item(sym::Option, did)`
error: use of a def path to a `LangItem`
--> tests/ui-internal/unnecessary_def_path.rs:52:13
--> tests/ui-internal/unnecessary_def_path.rs:53:13
|
LL | let _ = match_def_path(cx, did, &["core", "option", "Option", "Some"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `cx.tcx.lang_items().get(LangItem::OptionSome) == Some(did)`
@ -74,25 +74,25 @@ LL | let _ = match_def_path(cx, did, &["core", "option", "Option", "Some"]);
= help: if this `DefId` came from a constructor expression or pattern then the parent `DefId` should be used instead
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:54:13
--> tests/ui-internal/unnecessary_def_path.rs:55:13
|
LL | let _ = match_trait_method(cx, expr, &["core", "convert", "AsRef"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_trait_method(cx, expr, sym::AsRef)`
error: use of a def path to a diagnostic item
--> tests/ui-internal/unnecessary_def_path.rs:56:13
--> tests/ui-internal/unnecessary_def_path.rs:57:13
|
LL | let _ = is_expr_path_def_path(cx, expr, &["core", "option", "Option"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_path_diagnostic_item(cx, expr, sym::Option)`
error: use of a def path to a `LangItem`
--> tests/ui-internal/unnecessary_def_path.rs:57:13
--> tests/ui-internal/unnecessary_def_path.rs:58:13
|
LL | let _ = is_expr_path_def_path(cx, expr, &["core", "iter", "traits", "Iterator", "next"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `path_res(cx, expr).opt_def_id().map_or(false, |id| cx.tcx.lang_items().get(LangItem::IteratorNext) == Some(id))`
error: use of a def path to a `LangItem`
--> tests/ui-internal/unnecessary_def_path.rs:58:13
--> tests/ui-internal/unnecessary_def_path.rs:59:13
|
LL | let _ = is_expr_path_def_path(cx, expr, &["core", "option", "Option", "Some"]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `is_res_lang_ctor(cx, path_res(cx, expr), LangItem::OptionSome)`

1
tests/ui/case_sensitive_file_extension_comparisons.fixed
View file

@ -1,4 +1,5 @@
#![warn(clippy::case_sensitive_file_extension_comparisons)]
#![allow(clippy::unnecessary_map_or)]
use std::string::String;

1
tests/ui/case_sensitive_file_extension_comparisons.rs
View file

@ -1,4 +1,5 @@
#![warn(clippy::case_sensitive_file_extension_comparisons)]
#![allow(clippy::unnecessary_map_or)]
use std::string::String;

12
tests/ui/case_sensitive_file_extension_comparisons.stderr
View file

@ -1,5 +1,5 @@
error: case-sensitive file extension comparison
--> tests/ui/case_sensitive_file_extension_comparisons.rs:13:5
--> tests/ui/case_sensitive_file_extension_comparisons.rs:14:5
|
LL | filename.ends_with(".rs")
| ^^^^^^^^^^^^^^^^^^^^^^^^^
@ -15,7 +15,7 @@ LL + .map_or(false, |ext| ext.eq_ignore_ascii_case("rs"))
|
error: case-sensitive file extension comparison
--> tests/ui/case_sensitive_file_extension_comparisons.rs:18:13
--> tests/ui/case_sensitive_file_extension_comparisons.rs:19:13
|
LL | let _ = String::new().ends_with(".ext12");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -29,7 +29,7 @@ LL ~ .map_or(false, |ext| ext.eq_ignore_ascii_case("ext12"));
|
error: case-sensitive file extension comparison
--> tests/ui/case_sensitive_file_extension_comparisons.rs:19:13
--> tests/ui/case_sensitive_file_extension_comparisons.rs:20:13
|
LL | let _ = "str".ends_with(".ext12");
| ^^^^^^^^^^^^^^^^^^^^^^^^^
@ -43,7 +43,7 @@ LL ~ .map_or(false, |ext| ext.eq_ignore_ascii_case("ext12"));
|
error: case-sensitive file extension comparison
--> tests/ui/case_sensitive_file_extension_comparisons.rs:23:17
--> tests/ui/case_sensitive_file_extension_comparisons.rs:24:17
|
LL | let _ = "str".ends_with(".ext12");
| ^^^^^^^^^^^^^^^^^^^^^^^^^
@ -57,7 +57,7 @@ LL ~ .map_or(false, |ext| ext.eq_ignore_ascii_case("ext12"));
|
error: case-sensitive file extension comparison
--> tests/ui/case_sensitive_file_extension_comparisons.rs:30:13
--> tests/ui/case_sensitive_file_extension_comparisons.rs:31:13
|
LL | let _ = String::new().ends_with(".EXT12");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -71,7 +71,7 @@ LL ~ .map_or(false, |ext| ext.eq_ignore_ascii_case("EXT12"));
|
error: case-sensitive file extension comparison
--> tests/ui/case_sensitive_file_extension_comparisons.rs:31:13
--> tests/ui/case_sensitive_file_extension_comparisons.rs:32:13
|
LL | let _ = "str".ends_with(".EXT12");
| ^^^^^^^^^^^^^^^^^^^^^^^^^

64
tests/ui/unnecessary_map_or.fixed Normal file
View file

@ -0,0 +1,64 @@
//@aux-build:proc_macros.rs
#![warn(clippy::unnecessary_map_or)]
#![allow(clippy::no_effect)]
#![allow(clippy::eq_op)]
#![allow(clippy::unnecessary_lazy_evaluations)]
#[clippy::msrv = "1.70.0"]
#[macro_use]
extern crate proc_macros;
fn main() {
// should trigger
let _ = (Some(5) == Some(5));
let _ = (Some(5) != Some(5));
let _ = (Some(5) == Some(5));
let _ = Some(5).is_some_and(|n| {
let _ = n;
6 >= 5
});
let _ = Some(vec![5]).is_some_and(|n| n == [5]);
let _ = Some(vec![1]).is_some_and(|n| vec![2] == n);
let _ = Some(5).is_some_and(|n| n == n);
let _ = Some(5).is_some_and(|n| n == if 2 > 1 { n } else { 0 });
let _ = Ok::<Vec<i32>, i32>(vec![5]).is_ok_and(|n| n == [5]);
let _ = (Ok::<i32, i32>(5) == Ok(5));
let _ = (Some(5) == Some(5)).then(|| 1);
// shouldnt trigger
let _ = Some(5).map_or(true, |n| n == 5);
let _ = Some(5).map_or(true, |n| 5 == n);
macro_rules! x {
() => {
Some(1)
};
}
// methods lints dont fire on macros
let _ = x!().map_or(false, |n| n == 1);
let _ = x!().map_or(false, |n| n == vec![1][0]);
msrv_1_69();
external! {
let _ = Some(5).map_or(false, |n| n == 5);
}
with_span! {
let _ = Some(5).map_or(false, |n| n == 5);
}
// check for presence of PartialEq, and alter suggestion to use `is_ok_and` if absent
struct S;
let r: Result<i32, S> = Ok(3);
let _ = r.is_ok_and(|x| x == 7);
#[derive(PartialEq)]
struct S2;
let r: Result<i32, S2> = Ok(4);
let _ = (r == Ok(8));
}
#[clippy::msrv = "1.69.0"]
fn msrv_1_69() {
// is_some_and added in 1.70.0
let _ = Some(5).map_or(false, |n| n == if 2 > 1 { n } else { 0 });
}

67
tests/ui/unnecessary_map_or.rs Normal file
View file

@ -0,0 +1,67 @@
//@aux-build:proc_macros.rs
#![warn(clippy::unnecessary_map_or)]
#![allow(clippy::no_effect)]
#![allow(clippy::eq_op)]
#![allow(clippy::unnecessary_lazy_evaluations)]
#[clippy::msrv = "1.70.0"]
#[macro_use]
extern crate proc_macros;
fn main() {
// should trigger
let _ = Some(5).map_or(false, |n| n == 5);
let _ = Some(5).map_or(true, |n| n != 5);
let _ = Some(5).map_or(false, |n| {
let _ = 1;
n == 5
});
let _ = Some(5).map_or(false, |n| {
let _ = n;
6 >= 5
});
let _ = Some(vec![5]).map_or(false, |n| n == [5]);
let _ = Some(vec![1]).map_or(false, |n| vec![2] == n);
let _ = Some(5).map_or(false, |n| n == n);
let _ = Some(5).map_or(false, |n| n == if 2 > 1 { n } else { 0 });
let _ = Ok::<Vec<i32>, i32>(vec![5]).map_or(false, |n| n == [5]);
let _ = Ok::<i32, i32>(5).map_or(false, |n| n == 5);
let _ = Some(5).map_or(false, |n| n == 5).then(|| 1);
// shouldnt trigger
let _ = Some(5).map_or(true, |n| n == 5);
let _ = Some(5).map_or(true, |n| 5 == n);
macro_rules! x {
() => {
Some(1)
};
}
// methods lints dont fire on macros
let _ = x!().map_or(false, |n| n == 1);
let _ = x!().map_or(false, |n| n == vec![1][0]);
msrv_1_69();
external! {
let _ = Some(5).map_or(false, |n| n == 5);
}
with_span! {
let _ = Some(5).map_or(false, |n| n == 5);
}
// check for presence of PartialEq, and alter suggestion to use `is_ok_and` if absent
struct S;
let r: Result<i32, S> = Ok(3);
let _ = r.map_or(false, |x| x == 7);
#[derive(PartialEq)]
struct S2;
let r: Result<i32, S2> = Ok(4);
let _ = r.map_or(false, |x| x == 8);
}
#[clippy::msrv = "1.69.0"]
fn msrv_1_69() {
// is_some_and added in 1.70.0
let _ = Some(5).map_or(false, |n| n == if 2 > 1 { n } else { 0 });
}

99
tests/ui/unnecessary_map_or.stderr Normal file
View file

@ -0,0 +1,99 @@
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:12:13
|
LL | let _ = Some(5).map_or(false, |n| n == 5);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(Some(5) == Some(5))`
|
= note: `-D clippy::unnecessary-map-or` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::unnecessary_map_or)]`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:13:13
|
LL | let _ = Some(5).map_or(true, |n| n != 5);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(Some(5) != Some(5))`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:14:13
|
LL | let _ = Some(5).map_or(false, |n| {
| _____________^
LL | | let _ = 1;
LL | | n == 5
LL | | });
| |______^ help: use a standard comparison instead: `(Some(5) == Some(5))`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:18:13
|
LL | let _ = Some(5).map_or(false, |n| {
| _____________^
LL | | let _ = n;
LL | | 6 >= 5
LL | | });
| |______^
|
help: use is_some_and instead
|
LL ~ let _ = Some(5).is_some_and(|n| {
LL + let _ = n;
LL + 6 >= 5
LL ~ });
|
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:22:13
|
LL | let _ = Some(vec![5]).map_or(false, |n| n == [5]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_some_and instead: `Some(vec![5]).is_some_and(|n| n == [5])`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:23:13
|
LL | let _ = Some(vec![1]).map_or(false, |n| vec![2] == n);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_some_and instead: `Some(vec![1]).is_some_and(|n| vec![2] == n)`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:24:13
|
LL | let _ = Some(5).map_or(false, |n| n == n);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_some_and instead: `Some(5).is_some_and(|n| n == n)`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:25:13
|
LL | let _ = Some(5).map_or(false, |n| n == if 2 > 1 { n } else { 0 });
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_some_and instead: `Some(5).is_some_and(|n| n == if 2 > 1 { n } else { 0 })`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:26:13
|
LL | let _ = Ok::<Vec<i32>, i32>(vec![5]).map_or(false, |n| n == [5]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_ok_and instead: `Ok::<Vec<i32>, i32>(vec![5]).is_ok_and(|n| n == [5])`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:27:13
|
LL | let _ = Ok::<i32, i32>(5).map_or(false, |n| n == 5);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(Ok::<i32, i32>(5) == Ok(5))`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:28:13
|
LL | let _ = Some(5).map_or(false, |n| n == 5).then(|| 1);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(Some(5) == Some(5))`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:55:13
|
LL | let _ = r.map_or(false, |x| x == 7);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_ok_and instead: `r.is_ok_and(|x| x == 7)`
error: this `map_or` is redundant
--> tests/ui/unnecessary_map_or.rs:60:13
|
LL | let _ = r.map_or(false, |x| x == 8);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(r == Ok(8))`
error: aborting due to 13 previous errors