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Auto merge of #8802 - smoelius:allow-expect-unwrap-in-tests, r=llogiq

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Optionally allow `expect` and `unwrap` in tests

This addresses #1015, except it makes the new behavior optional.

The reason for the msrv-related changes is as follows.

Rather than expand `check_methods` list of arguments, it seemed easier to make `check_methods` a method of `Methods`, so that `check_methods` could access `Methods`' fields.

`check_methods` had an `msrv` parameter, which I consequently made a field of `Methods`. But, to avoid adding a lifetime parameter to `Methods`, I made the field type `Option<RustcVersion>` instead of the parameter's existing type, `Option<&RustcVersion>`. This seemed sensible since `RustcVersion` implements `Copy`. But this broke a lot of code that expected an `Option<&RustcVersion>` or `&Option<RustcVersion>`. I changed all of those occurrences to `Option<RustcVersion>`. IMHO, the code is better as a result of these changes, though.

The msrv-related changes are in their own commit to (hopefully) ease review.

Closes #1015

changelog: optionally allow `expect` and `unwrap` in tests

r? `@llogiq`
This commit is contained in:
bors 2022-05-08 15:00:30 +00:00
commit 4667198d4f
47 changed files with 614 additions and 254 deletions
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4
clippy_lints/src/approx_const.rs
View file

@ -87,9 +87,7 @@ impl ApproxConstant {
let s = s.as_str();
if s.parse::<f64>().is_ok() {
for &(constant, name, min_digits, msrv) in &KNOWN_CONSTS {
if is_approx_const(constant, s, min_digits)
&& msrv.as_ref().map_or(true, |msrv| meets_msrv(self.msrv.as_ref(), msrv))
{
if is_approx_const(constant, s, min_digits) && msrv.map_or(true, |msrv| meets_msrv(self.msrv, msrv)) {
span_lint_and_help(
cx,
APPROX_CONSTANT,

2
clippy_lints/src/attrs.rs
View file

@ -613,7 +613,7 @@ fn check_empty_line_after_outer_attr(cx: &EarlyContext<'_>, item: &rustc_ast::It
fn check_deprecated_cfg_attr(cx: &EarlyContext<'_>, attr: &Attribute, msrv: Option<RustcVersion>) {
if_chain! {
if meets_msrv(msrv.as_ref(), &msrvs::TOOL_ATTRIBUTES);
if meets_msrv(msrv, msrvs::TOOL_ATTRIBUTES);
// check cfg_attr
if attr.has_name(sym::cfg_attr);
if let Some(items) = attr.meta_item_list();

2
clippy_lints/src/borrow_as_ptr.rs
View file

@ -57,7 +57,7 @@ impl BorrowAsPtr {
impl<'tcx> LateLintPass<'tcx> for BorrowAsPtr {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::BORROW_AS_PTR) {
if !meets_msrv(self.msrv, msrvs::BORROW_AS_PTR) {
return;
}

4
clippy_lints/src/casts/cast_abs_to_unsigned.rs
View file

@ -16,10 +16,10 @@ pub(super) fn check(
cast_expr: &Expr<'_>,
cast_from: Ty<'_>,
cast_to: Ty<'_>,
msrv: &Option<RustcVersion>,
msrv: Option<RustcVersion>,
) {
if_chain! {
if meets_msrv(msrv.as_ref(), &msrvs::UNSIGNED_ABS);
if meets_msrv(msrv, msrvs::UNSIGNED_ABS);
if cast_from.is_integral();
if cast_to.is_integral();
if cast_from.is_signed();

6
clippy_lints/src/casts/cast_lossless.rs
View file

@ -16,7 +16,7 @@ pub(super) fn check(
cast_op: &Expr<'_>,
cast_from: Ty<'_>,
cast_to: Ty<'_>,
msrv: &Option<RustcVersion>,
msrv: Option<RustcVersion>,
) {
if !should_lint(cx, expr, cast_from, cast_to, msrv) {
return;
@ -68,7 +68,7 @@ fn should_lint(
expr: &Expr<'_>,
cast_from: Ty<'_>,
cast_to: Ty<'_>,
msrv: &Option<RustcVersion>,
msrv: Option<RustcVersion>,
) -> bool {
// Do not suggest using From in consts/statics until it is valid to do so (see #2267).
if in_constant(cx, expr.hir_id) {
@ -95,7 +95,7 @@ fn should_lint(
};
!is_isize_or_usize(cast_from) && from_nbits < to_nbits
},
(false, true) if matches!(cast_from.kind(), ty::Bool) && meets_msrv(msrv.as_ref(), &msrvs::FROM_BOOL) => true,
(false, true) if matches!(cast_from.kind(), ty::Bool) && meets_msrv(msrv, msrvs::FROM_BOOL) => true,
(_, _) => {
matches!(cast_from.kind(), ty::Float(FloatTy::F32)) && matches!(cast_to.kind(), ty::Float(FloatTy::F64))
},

4
clippy_lints/src/casts/cast_slice_different_sizes.rs
View file

@ -8,9 +8,9 @@ use rustc_semver::RustcVersion;
use super::CAST_SLICE_DIFFERENT_SIZES;
pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, msrv: &Option<RustcVersion>) {
pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, msrv: Option<RustcVersion>) {
// suggestion is invalid if `ptr::slice_from_raw_parts` does not exist
if !meets_msrv(msrv.as_ref(), &msrvs::PTR_SLICE_RAW_PARTS) {
if !meets_msrv(msrv, msrvs::PTR_SLICE_RAW_PARTS) {
return;
}

10
clippy_lints/src/casts/mod.rs
View file

@ -532,7 +532,7 @@ impl_lint_pass!(Casts => [
impl<'tcx> LateLintPass<'tcx> for Casts {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if !in_external_macro(cx.sess(), expr.span) {
ptr_as_ptr::check(cx, expr, &self.msrv);
ptr_as_ptr::check(cx, expr, self.msrv);
}
if expr.span.from_expansion() {
@ -562,9 +562,9 @@ impl<'tcx> LateLintPass<'tcx> for Casts {
cast_possible_wrap::check(cx, expr, cast_from, cast_to);
cast_precision_loss::check(cx, expr, cast_from, cast_to);
cast_sign_loss::check(cx, expr, cast_expr, cast_from, cast_to);
cast_abs_to_unsigned::check(cx, expr, cast_expr, cast_from, cast_to, &self.msrv);
cast_abs_to_unsigned::check(cx, expr, cast_expr, cast_from, cast_to, self.msrv);
}
cast_lossless::check(cx, expr, cast_expr, cast_from, cast_to, &self.msrv);
cast_lossless::check(cx, expr, cast_expr, cast_from, cast_to, self.msrv);
cast_enum_constructor::check(cx, expr, cast_expr, cast_from);
}
}
@ -572,8 +572,8 @@ impl<'tcx> LateLintPass<'tcx> for Casts {
cast_ref_to_mut::check(cx, expr);
cast_ptr_alignment::check(cx, expr);
char_lit_as_u8::check(cx, expr);
ptr_as_ptr::check(cx, expr, &self.msrv);
cast_slice_different_sizes::check(cx, expr, &self.msrv);
ptr_as_ptr::check(cx, expr, self.msrv);
cast_slice_different_sizes::check(cx, expr, self.msrv);
}
extract_msrv_attr!(LateContext);

4
clippy_lints/src/casts/ptr_as_ptr.rs
View file

@ -12,8 +12,8 @@ use rustc_semver::RustcVersion;
use super::PTR_AS_PTR;
pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, msrv: &Option<RustcVersion>) {
if !meets_msrv(msrv.as_ref(), &msrvs::POINTER_CAST) {
pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, msrv: Option<RustcVersion>) {
if !meets_msrv(msrv, msrvs::POINTER_CAST) {
return;
}

2
clippy_lints/src/checked_conversions.rs
View file

@ -57,7 +57,7 @@ impl_lint_pass!(CheckedConversions => [CHECKED_CONVERSIONS]);
impl<'tcx> LateLintPass<'tcx> for CheckedConversions {
fn check_expr(&mut self, cx: &LateContext<'_>, item: &Expr<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::TRY_FROM) {
if !meets_msrv(self.msrv, msrvs::TRY_FROM) {
return;
}

2
clippy_lints/src/from_over_into.rs
View file

@ -55,7 +55,7 @@ impl_lint_pass!(FromOverInto => [FROM_OVER_INTO]);
impl<'tcx> LateLintPass<'tcx> for FromOverInto {
fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::RE_REBALANCING_COHERENCE) {
if !meets_msrv(self.msrv, msrvs::RE_REBALANCING_COHERENCE) {
return;
}

2
clippy_lints/src/if_then_some_else_none.rs
View file

@ -57,7 +57,7 @@ impl_lint_pass!(IfThenSomeElseNone => [IF_THEN_SOME_ELSE_NONE]);
impl<'tcx> LateLintPass<'tcx> for IfThenSomeElseNone {
fn check_expr(&mut self, cx: &LateContext<'_>, expr: &'tcx Expr<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::BOOL_THEN) {
if !meets_msrv(self.msrv, msrvs::BOOL_THEN) {
return;
}

2
clippy_lints/src/index_refutable_slice.rs
View file

@ -75,7 +75,7 @@ impl<'tcx> LateLintPass<'tcx> for IndexRefutableSlice {
if !expr.span.from_expansion() || is_expn_of(expr.span, "if_chain").is_some();
if let Some(IfLet {let_pat, if_then, ..}) = IfLet::hir(cx, expr);
if !is_lint_allowed(cx, INDEX_REFUTABLE_SLICE, expr.hir_id);
if meets_msrv(self.msrv.as_ref(), &msrvs::SLICE_PATTERNS);
if meets_msrv(self.msrv, msrvs::SLICE_PATTERNS);
let found_slices = find_slice_values(cx, let_pat);
if !found_slices.is_empty();

11
clippy_lints/src/lib.rs
View file

@ -582,8 +582,17 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
});
let avoid_breaking_exported_api = conf.avoid_breaking_exported_api;
let allow_expect_in_tests = conf.allow_expect_in_tests;
let allow_unwrap_in_tests = conf.allow_unwrap_in_tests;
store.register_late_pass(move || Box::new(approx_const::ApproxConstant::new(msrv)));
store.register_late_pass(move || Box::new(methods::Methods::new(avoid_breaking_exported_api, msrv)));
store.register_late_pass(move || {
Box::new(methods::Methods::new(
avoid_breaking_exported_api,
msrv,
allow_expect_in_tests,
allow_unwrap_in_tests,
))
});
store.register_late_pass(move || Box::new(matches::Matches::new(msrv)));
store.register_early_pass(move || Box::new(manual_non_exhaustive::ManualNonExhaustiveStruct::new(msrv)));
store.register_late_pass(move || Box::new(manual_non_exhaustive::ManualNonExhaustiveEnum::new(msrv)));

2
clippy_lints/src/manual_bits.rs
View file

@ -48,7 +48,7 @@ impl_lint_pass!(ManualBits => [MANUAL_BITS]);
impl<'tcx> LateLintPass<'tcx> for ManualBits {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::MANUAL_BITS) {
if !meets_msrv(self.msrv, msrvs::MANUAL_BITS) {
return;
}

4
clippy_lints/src/manual_non_exhaustive.rs
View file

@ -98,7 +98,7 @@ impl_lint_pass!(ManualNonExhaustiveEnum => [MANUAL_NON_EXHAUSTIVE]);
impl EarlyLintPass for ManualNonExhaustiveStruct {
fn check_item(&mut self, cx: &EarlyContext<'_>, item: &ast::Item) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::NON_EXHAUSTIVE) {
if !meets_msrv(self.msrv, msrvs::NON_EXHAUSTIVE) {
return;
}
@ -150,7 +150,7 @@ impl EarlyLintPass for ManualNonExhaustiveStruct {
impl<'tcx> LateLintPass<'tcx> for ManualNonExhaustiveEnum {
fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::NON_EXHAUSTIVE) {
if !meets_msrv(self.msrv, msrvs::NON_EXHAUSTIVE) {
return;
}

2
clippy_lints/src/manual_strip.rs
View file

@ -68,7 +68,7 @@ enum StripKind {
impl<'tcx> LateLintPass<'tcx> for ManualStrip {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::STR_STRIP_PREFIX) {
if !meets_msrv(self.msrv, msrvs::STR_STRIP_PREFIX) {
return;
}

2
clippy_lints/src/map_clone.rs
View file

@ -144,7 +144,7 @@ impl MapClone {
fn lint_explicit_closure(&self, cx: &LateContext<'_>, replace: Span, root: Span, is_copy: bool) {
let mut applicability = Applicability::MachineApplicable;
let (message, sugg_method) = if is_copy && meets_msrv(self.msrv.as_ref(), &msrvs::ITERATOR_COPIED) {
let (message, sugg_method) = if is_copy && meets_msrv(self.msrv, msrvs::ITERATOR_COPIED) {
("you are using an explicit closure for copying elements", "copied")
} else {
("you are using an explicit closure for cloning elements", "cloned")

4
clippy_lints/src/matches/mod.rs
View file

@ -658,7 +658,7 @@ impl<'tcx> LateLintPass<'tcx> for Matches {
}
if !contains_cfg_arm(cx, expr, ex, arms) {
if source == MatchSource::Normal {
if !(meets_msrv(self.msrv.as_ref(), &msrvs::MATCHES_MACRO)
if !(meets_msrv(self.msrv, msrvs::MATCHES_MACRO)
&& match_like_matches::check_match(cx, expr, ex, arms))
{
match_same_arms::check(cx, arms);
@ -685,7 +685,7 @@ impl<'tcx> LateLintPass<'tcx> for Matches {
match_wild_err_arm::check(cx, ex, arms);
wild_in_or_pats::check(cx, arms);
} else {
if meets_msrv(self.msrv.as_ref(), &msrvs::MATCHES_MACRO) {
if meets_msrv(self.msrv, msrvs::MATCHES_MACRO) {
match_like_matches::check(cx, expr);
}
redundant_pattern_match::check(cx, expr);

2
clippy_lints/src/mem_replace.rs
View file

@ -254,7 +254,7 @@ impl<'tcx> LateLintPass<'tcx> for MemReplace {
then {
check_replace_option_with_none(cx, src, dest, expr.span);
check_replace_with_uninit(cx, src, dest, expr.span);
if meets_msrv(self.msrv.as_ref(), &msrvs::MEM_TAKE) {
if meets_msrv(self.msrv, msrvs::MEM_TAKE) {
check_replace_with_default(cx, src, dest, expr.span);
}
}

6
clippy_lints/src/methods/cloned_instead_of_copied.rs
View file

@ -10,16 +10,16 @@ use rustc_span::{sym, Span};
use super::CLONED_INSTEAD_OF_COPIED;
pub fn check(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, span: Span, msrv: Option<&RustcVersion>) {
pub fn check(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, span: Span, msrv: Option<RustcVersion>) {
let recv_ty = cx.typeck_results().expr_ty_adjusted(recv);
let inner_ty = match recv_ty.kind() {
// `Option<T>` -> `T`
ty::Adt(adt, subst)
if cx.tcx.is_diagnostic_item(sym::Option, adt.did()) && meets_msrv(msrv, &msrvs::OPTION_COPIED) =>
if cx.tcx.is_diagnostic_item(sym::Option, adt.did()) && meets_msrv(msrv, msrvs::OPTION_COPIED) =>
{
subst.type_at(0)
},
_ if is_trait_method(cx, expr, sym::Iterator) && meets_msrv(msrv, &msrvs::ITERATOR_COPIED) => {
_ if is_trait_method(cx, expr, sym::Iterator) && meets_msrv(msrv, msrvs::ITERATOR_COPIED) => {
match get_iterator_item_ty(cx, recv_ty) {
// <T as Iterator>::Item
Some(ty) => ty,

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

@ -13,7 +13,7 @@ pub(super) fn check(
cx: &LateContext<'_>,
_expr: &rustc_hir::Expr<'_>,
recv: &rustc_hir::Expr<'_>,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
expect_span: Span,
err_span: Span,
) {
@ -21,7 +21,7 @@ pub(super) fn check(
if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result);
// Test the version to make sure the lint can be showed (expect_err has been
// introduced in rust 1.17.0 : https://github.com/rust-lang/rust/pull/38982)
if meets_msrv(msrv, &msrvs::EXPECT_ERR);
if meets_msrv(msrv, msrvs::EXPECT_ERR);
// Grabs the `Result<T, E>` type
let result_type = cx.typeck_results().expr_ty(recv);

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

@ -1,4 +1,5 @@
use clippy_utils::diagnostics::span_lint_and_help;
use clippy_utils::is_in_test_function;
use clippy_utils::ty::is_type_diagnostic_item;
use rustc_hir as hir;
use rustc_lint::LateContext;
@ -7,7 +8,7 @@ use rustc_span::sym;
use super::EXPECT_USED;
/// lint use of `expect()` for `Option`s and `Result`s
pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) {
pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>, allow_expect_in_tests: bool) {
let obj_ty = cx.typeck_results().expr_ty(recv).peel_refs();
let mess = if is_type_diagnostic_item(cx, obj_ty, sym::Option) {
@ -18,6 +19,10 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr
None
};
if allow_expect_in_tests && is_in_test_function(cx.tcx, expr.hir_id) {
return;
}
if let Some((lint, kind, none_value)) = mess {
span_lint_and_help(
cx,

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

@ -14,10 +14,10 @@ pub(super) fn check<'tcx>(
expr: &'tcx hir::Expr<'_>,
recv: &'tcx hir::Expr<'_>,
arg: &'tcx hir::Expr<'_>,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) {
if is_trait_method(cx, expr, sym::Iterator) {
if !meets_msrv(msrv, &msrvs::ITERATOR_FIND_MAP) {
if !meets_msrv(msrv, msrvs::ITERATOR_FIND_MAP) {
return;
}

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

@ -15,9 +15,9 @@ pub(super) fn check<'tcx>(
expr: &'tcx Expr<'_>,
self_arg: &'tcx Expr<'_>,
radix: &'tcx Expr<'_>,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) {
if !meets_msrv(msrv, &msrvs::IS_ASCII_DIGIT) {
if !meets_msrv(msrv, msrvs::IS_ASCII_DIGIT) {
return;
}

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

@ -19,13 +19,13 @@ pub(super) fn check<'tcx>(
recv: &'tcx hir::Expr<'_>,
map_arg: &'tcx hir::Expr<'_>,
unwrap_arg: &'tcx hir::Expr<'_>,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) -> bool {
// lint if the caller of `map()` is an `Option`
let is_option = is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Option);
let is_result = is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result);
if is_result && !meets_msrv(msrv, &msrvs::RESULT_MAP_OR_ELSE) {
if is_result && !meets_msrv(msrv, msrvs::RESULT_MAP_OR_ELSE) {
return false;
}

378
clippy_lints/src/methods/mod.rs
View file

@ -2200,14 +2200,23 @@ declare_clippy_lint! {
pub struct Methods {
avoid_breaking_exported_api: bool,
msrv: Option<RustcVersion>,
allow_expect_in_tests: bool,
allow_unwrap_in_tests: bool,
}
impl Methods {
#[must_use]
pub fn new(avoid_breaking_exported_api: bool, msrv: Option<RustcVersion>) -> Self {
pub fn new(
avoid_breaking_exported_api: bool,
msrv: Option<RustcVersion>,
allow_expect_in_tests: bool,
allow_unwrap_in_tests: bool,
) -> Self {
Self {
avoid_breaking_exported_api,
msrv,
allow_expect_in_tests,
allow_unwrap_in_tests,
}
}
}
@ -2306,7 +2315,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods {
return;
}
check_methods(cx, expr, self.msrv.as_ref());
self.check_methods(cx, expr);
match expr.kind {
hir::ExprKind::Call(func, args) => {
@ -2322,7 +2331,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods {
single_char_add_str::check(cx, expr, args);
into_iter_on_ref::check(cx, expr, method_span, method_call.ident.name, args);
single_char_pattern::check(cx, expr, method_call.ident.name, args);
unnecessary_to_owned::check(cx, expr, method_call.ident.name, args, self.msrv.as_ref());
unnecessary_to_owned::check(cx, expr, method_call.ident.name, args, self.msrv);
},
hir::ExprKind::Binary(op, lhs, rhs) if op.node == hir::BinOpKind::Eq || op.node == hir::BinOpKind::Ne => {
let mut info = BinaryExprInfo {
@ -2505,196 +2514,201 @@ impl<'tcx> LateLintPass<'tcx> for Methods {
extract_msrv_attr!(LateContext);
}
#[allow(clippy::too_many_lines)]
fn check_methods<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, msrv: Option<&RustcVersion>) {
if let Some((name, [recv, args @ ..], span)) = method_call(expr) {
match (name, args) {
("add" | "offset" | "sub" | "wrapping_offset" | "wrapping_add" | "wrapping_sub", [_arg]) => {
zst_offset::check(cx, expr, recv);
},
("and_then", [arg]) => {
let biom_option_linted = bind_instead_of_map::OptionAndThenSome::check(cx, expr, recv, arg);
let biom_result_linted = bind_instead_of_map::ResultAndThenOk::check(cx, expr, recv, arg);
if !biom_option_linted && !biom_result_linted {
unnecessary_lazy_eval::check(cx, expr, recv, arg, "and");
}
},
("as_deref" | "as_deref_mut", []) => {
needless_option_as_deref::check(cx, expr, recv, name);
},
("as_mut", []) => useless_asref::check(cx, expr, "as_mut", recv),
("as_ref", []) => useless_asref::check(cx, expr, "as_ref", recv),
("assume_init", []) => uninit_assumed_init::check(cx, expr, recv),
("cloned", []) => cloned_instead_of_copied::check(cx, expr, recv, span, msrv),
("collect", []) => match method_call(recv) {
Some((name @ ("cloned" | "copied"), [recv2], _)) => {
iter_cloned_collect::check(cx, name, expr, recv2);
impl Methods {
#[allow(clippy::too_many_lines)]
fn check_methods<'tcx>(&self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if let Some((name, [recv, args @ ..], span)) = method_call(expr) {
match (name, args) {
("add" | "offset" | "sub" | "wrapping_offset" | "wrapping_add" | "wrapping_sub", [_arg]) => {
zst_offset::check(cx, expr, recv);
},
Some(("map", [m_recv, m_arg], _)) => {
map_collect_result_unit::check(cx, expr, m_recv, m_arg, recv);
},
Some(("take", [take_self_arg, take_arg], _)) => {
if meets_msrv(msrv, &msrvs::STR_REPEAT) {
manual_str_repeat::check(cx, expr, recv, take_self_arg, take_arg);
("and_then", [arg]) => {
let biom_option_linted = bind_instead_of_map::OptionAndThenSome::check(cx, expr, recv, arg);
let biom_result_linted = bind_instead_of_map::ResultAndThenOk::check(cx, expr, recv, arg);
if !biom_option_linted && !biom_result_linted {
unnecessary_lazy_eval::check(cx, expr, recv, arg, "and");
}
},
_ => {},
},
(name @ "count", args @ []) => match method_call(recv) {
Some(("cloned", [recv2], _)) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
Some((name2 @ ("into_iter" | "iter" | "iter_mut"), [recv2], _)) => {
iter_count::check(cx, expr, recv2, name2);
("as_deref" | "as_deref_mut", []) => {
needless_option_as_deref::check(cx, expr, recv, name);
},
Some(("map", [_, arg], _)) => suspicious_map::check(cx, expr, recv, arg),
_ => {},
},
("drain", [arg]) => {
iter_with_drain::check(cx, expr, recv, span, arg);
},
("expect", [_]) => match method_call(recv) {
Some(("ok", [recv], _)) => ok_expect::check(cx, expr, recv),
Some(("err", [recv], err_span)) => err_expect::check(cx, expr, recv, msrv, span, err_span),
_ => expect_used::check(cx, expr, recv),
},
("extend", [arg]) => {
string_extend_chars::check(cx, expr, recv, arg);
extend_with_drain::check(cx, expr, recv, arg);
},
("filter_map", [arg]) => {
unnecessary_filter_map::check(cx, expr, arg, name);
filter_map_identity::check(cx, expr, arg, span);
},
("find_map", [arg]) => {
unnecessary_filter_map::check(cx, expr, arg, name);
},
("flat_map", [arg]) => {
flat_map_identity::check(cx, expr, arg, span);
flat_map_option::check(cx, expr, arg, span);
},
(name @ "flatten", args @ []) => match method_call(recv) {
Some(("map", [recv, map_arg], map_span)) => map_flatten::check(cx, expr, recv, map_arg, map_span),
Some(("cloned", [recv2], _)) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
_ => {},
},
("fold", [init, acc]) => unnecessary_fold::check(cx, expr, init, acc, span),
("for_each", [_]) => {
if let Some(("inspect", [_, _], span2)) = method_call(recv) {
inspect_for_each::check(cx, expr, span2);
}
},
("get_or_insert_with", [arg]) => unnecessary_lazy_eval::check(cx, expr, recv, arg, "get_or_insert"),
("is_file", []) => filetype_is_file::check(cx, expr, recv),
("is_digit", [radix]) => is_digit_ascii_radix::check(cx, expr, recv, radix, msrv),
("is_none", []) => check_is_some_is_none(cx, expr, recv, false),
("is_some", []) => check_is_some_is_none(cx, expr, recv, true),
("join", [join_arg]) => {
if let Some(("collect", _, span)) = method_call(recv) {
unnecessary_join::check(cx, expr, recv, join_arg, span);
}
},
("last", args @ []) | ("skip", args @ [_]) => {
if let Some((name2, [recv2, args2 @ ..], _span2)) = method_call(recv) {
if let ("cloned", []) = (name2, args2) {
iter_overeager_cloned::check(cx, expr, recv2, name, args);
}
}
},
(name @ ("map" | "map_err"), [m_arg]) => {
if let Some((name, [recv2, args @ ..], span2)) = method_call(recv) {
match (name, args) {
("as_mut", []) => option_as_ref_deref::check(cx, expr, recv2, m_arg, true, msrv),
("as_ref", []) => option_as_ref_deref::check(cx, expr, recv2, m_arg, false, msrv),
("filter", [f_arg]) => {
filter_map::check(cx, expr, recv2, f_arg, span2, recv, m_arg, span, false);
},
("find", [f_arg]) => filter_map::check(cx, expr, recv2, f_arg, span2, recv, m_arg, span, true),
_ => {},
}
}
map_identity::check(cx, expr, recv, m_arg, name, span);
},
("map_or", [def, map]) => option_map_or_none::check(cx, expr, recv, def, map),
(name @ "next", args @ []) => {
if let Some((name2, [recv2, args2 @ ..], _)) = method_call(recv) {
match (name2, args2) {
("cloned", []) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
("filter", [arg]) => filter_next::check(cx, expr, recv2, arg),
("filter_map", [arg]) => filter_map_next::check(cx, expr, recv2, arg, msrv),
("iter", []) => iter_next_slice::check(cx, expr, recv2),
("skip", [arg]) => iter_skip_next::check(cx, expr, recv2, arg),
("skip_while", [_]) => skip_while_next::check(cx, expr),
_ => {},
}
}
},
("nth", args @ [n_arg]) => match method_call(recv) {
Some(("bytes", [recv2], _)) => bytes_nth::check(cx, expr, recv2, n_arg),
Some(("cloned", [recv2], _)) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
Some(("iter", [recv2], _)) => iter_nth::check(cx, expr, recv2, recv, n_arg, false),
Some(("iter_mut", [recv2], _)) => iter_nth::check(cx, expr, recv2, recv, n_arg, true),
_ => iter_nth_zero::check(cx, expr, recv, n_arg),
},
("ok_or_else", [arg]) => unnecessary_lazy_eval::check(cx, expr, recv, arg, "ok_or"),
("or_else", [arg]) => {
if !bind_instead_of_map::ResultOrElseErrInfo::check(cx, expr, recv, arg) {
unnecessary_lazy_eval::check(cx, expr, recv, arg, "or");
}
},
("splitn" | "rsplitn", [count_arg, pat_arg]) => {
if let Some((Constant::Int(count), _)) = constant(cx, cx.typeck_results(), count_arg) {
suspicious_splitn::check(cx, name, expr, recv, count);
str_splitn::check(cx, name, expr, recv, pat_arg, count, msrv);
}
},
("splitn_mut" | "rsplitn_mut", [count_arg, _]) => {
if let Some((Constant::Int(count), _)) = constant(cx, cx.typeck_results(), count_arg) {
suspicious_splitn::check(cx, name, expr, recv, count);
}
},
("step_by", [arg]) => iterator_step_by_zero::check(cx, expr, arg),
("take", args @ [_arg]) => {
if let Some((name2, [recv2, args2 @ ..], _span2)) = method_call(recv) {
if let ("cloned", []) = (name2, args2) {
iter_overeager_cloned::check(cx, expr, recv2, name, args);
}
}
},
("take", []) => needless_option_take::check(cx, expr, recv),
("to_os_string" | "to_owned" | "to_path_buf" | "to_vec", []) => {
implicit_clone::check(cx, name, expr, recv);
},
("unwrap", []) => {
match method_call(recv) {
Some(("get", [recv, get_arg], _)) => {
get_unwrap::check(cx, expr, recv, get_arg, false);
("as_mut", []) => useless_asref::check(cx, expr, "as_mut", recv),
("as_ref", []) => useless_asref::check(cx, expr, "as_ref", recv),
("assume_init", []) => uninit_assumed_init::check(cx, expr, recv),
("cloned", []) => cloned_instead_of_copied::check(cx, expr, recv, span, self.msrv),
("collect", []) => match method_call(recv) {
Some((name @ ("cloned" | "copied"), [recv2], _)) => {
iter_cloned_collect::check(cx, name, expr, recv2);
},
Some(("get_mut", [recv, get_arg], _)) => {
get_unwrap::check(cx, expr, recv, get_arg, true);
Some(("map", [m_recv, m_arg], _)) => {
map_collect_result_unit::check(cx, expr, m_recv, m_arg, recv);
},
Some(("or", [recv, or_arg], or_span)) => {
or_then_unwrap::check(cx, expr, recv, or_arg, or_span);
Some(("take", [take_self_arg, take_arg], _)) => {
if meets_msrv(self.msrv, msrvs::STR_REPEAT) {
manual_str_repeat::check(cx, expr, recv, take_self_arg, take_arg);
}
},
_ => {},
}
unwrap_used::check(cx, expr, recv);
},
("unwrap_or", [u_arg]) => match method_call(recv) {
Some((arith @ ("checked_add" | "checked_sub" | "checked_mul"), [lhs, rhs], _)) => {
manual_saturating_arithmetic::check(cx, expr, lhs, rhs, u_arg, &arith["checked_".len()..]);
},
Some(("map", [m_recv, m_arg], span)) => {
option_map_unwrap_or::check(cx, expr, m_recv, m_arg, recv, u_arg, span);
(name @ "count", args @ []) => match method_call(recv) {
Some(("cloned", [recv2], _)) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
Some((name2 @ ("into_iter" | "iter" | "iter_mut"), [recv2], _)) => {
iter_count::check(cx, expr, recv2, name2);
},
Some(("map", [_, arg], _)) => suspicious_map::check(cx, expr, recv, arg),
_ => {},
},
("drain", [arg]) => {
iter_with_drain::check(cx, expr, recv, span, arg);
},
("expect", [_]) => match method_call(recv) {
Some(("ok", [recv], _)) => ok_expect::check(cx, expr, recv),
Some(("err", [recv], err_span)) => err_expect::check(cx, expr, recv, self.msrv, span, err_span),
_ => expect_used::check(cx, expr, recv, self.allow_expect_in_tests),
},
("extend", [arg]) => {
string_extend_chars::check(cx, expr, recv, arg);
extend_with_drain::check(cx, expr, recv, arg);
},
("filter_map", [arg]) => {
unnecessary_filter_map::check(cx, expr, arg, name);
filter_map_identity::check(cx, expr, arg, span);
},
("find_map", [arg]) => {
unnecessary_filter_map::check(cx, expr, arg, name);
},
("flat_map", [arg]) => {
flat_map_identity::check(cx, expr, arg, span);
flat_map_option::check(cx, expr, arg, span);
},
(name @ "flatten", args @ []) => match method_call(recv) {
Some(("map", [recv, map_arg], map_span)) => map_flatten::check(cx, expr, recv, map_arg, map_span),
Some(("cloned", [recv2], _)) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
_ => {},
},
("fold", [init, acc]) => unnecessary_fold::check(cx, expr, init, acc, span),
("for_each", [_]) => {
if let Some(("inspect", [_, _], span2)) = method_call(recv) {
inspect_for_each::check(cx, expr, span2);
}
},
("get_or_insert_with", [arg]) => unnecessary_lazy_eval::check(cx, expr, recv, arg, "get_or_insert"),
("is_file", []) => filetype_is_file::check(cx, expr, recv),
("is_digit", [radix]) => is_digit_ascii_radix::check(cx, expr, recv, radix, self.msrv),
("is_none", []) => check_is_some_is_none(cx, expr, recv, false),
("is_some", []) => check_is_some_is_none(cx, expr, recv, true),
("join", [join_arg]) => {
if let Some(("collect", _, span)) = method_call(recv) {
unnecessary_join::check(cx, expr, recv, join_arg, span);
}
},
("last", args @ []) | ("skip", args @ [_]) => {
if let Some((name2, [recv2, args2 @ ..], _span2)) = method_call(recv) {
if let ("cloned", []) = (name2, args2) {
iter_overeager_cloned::check(cx, expr, recv2, name, args);
}
}
},
(name @ ("map" | "map_err"), [m_arg]) => {
if let Some((name, [recv2, args @ ..], span2)) = method_call(recv) {
match (name, args) {
("as_mut", []) => option_as_ref_deref::check(cx, expr, recv2, m_arg, true, self.msrv),
("as_ref", []) => option_as_ref_deref::check(cx, expr, recv2, m_arg, false, self.msrv),
("filter", [f_arg]) => {
filter_map::check(cx, expr, recv2, f_arg, span2, recv, m_arg, span, false);
},
("find", [f_arg]) => {
filter_map::check(cx, expr, recv2, f_arg, span2, recv, m_arg, span, true);
},
_ => {},
}
}
map_identity::check(cx, expr, recv, m_arg, name, span);
},
("map_or", [def, map]) => option_map_or_none::check(cx, expr, recv, def, map),
(name @ "next", args @ []) => {
if let Some((name2, [recv2, args2 @ ..], _)) = method_call(recv) {
match (name2, args2) {
("cloned", []) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
("filter", [arg]) => filter_next::check(cx, expr, recv2, arg),
("filter_map", [arg]) => filter_map_next::check(cx, expr, recv2, arg, self.msrv),
("iter", []) => iter_next_slice::check(cx, expr, recv2),
("skip", [arg]) => iter_skip_next::check(cx, expr, recv2, arg),
("skip_while", [_]) => skip_while_next::check(cx, expr),
_ => {},
}
}
},
("nth", args @ [n_arg]) => match method_call(recv) {
Some(("bytes", [recv2], _)) => bytes_nth::check(cx, expr, recv2, n_arg),
Some(("cloned", [recv2], _)) => iter_overeager_cloned::check(cx, expr, recv2, name, args),
Some(("iter", [recv2], _)) => iter_nth::check(cx, expr, recv2, recv, n_arg, false),
Some(("iter_mut", [recv2], _)) => iter_nth::check(cx, expr, recv2, recv, n_arg, true),
_ => iter_nth_zero::check(cx, expr, recv, n_arg),
},
("ok_or_else", [arg]) => unnecessary_lazy_eval::check(cx, expr, recv, arg, "ok_or"),
("or_else", [arg]) => {
if !bind_instead_of_map::ResultOrElseErrInfo::check(cx, expr, recv, arg) {
unnecessary_lazy_eval::check(cx, expr, recv, arg, "or");
}
},
("splitn" | "rsplitn", [count_arg, pat_arg]) => {
if let Some((Constant::Int(count), _)) = constant(cx, cx.typeck_results(), count_arg) {
suspicious_splitn::check(cx, name, expr, recv, count);
str_splitn::check(cx, name, expr, recv, pat_arg, count, self.msrv);
}
},
("splitn_mut" | "rsplitn_mut", [count_arg, _]) => {
if let Some((Constant::Int(count), _)) = constant(cx, cx.typeck_results(), count_arg) {
suspicious_splitn::check(cx, name, expr, recv, count);
}
},
("step_by", [arg]) => iterator_step_by_zero::check(cx, expr, arg),
("take", args @ [_arg]) => {
if let Some((name2, [recv2, args2 @ ..], _span2)) = method_call(recv) {
if let ("cloned", []) = (name2, args2) {
iter_overeager_cloned::check(cx, expr, recv2, name, args);
}
}
},
("take", []) => needless_option_take::check(cx, expr, recv),
("to_os_string" | "to_owned" | "to_path_buf" | "to_vec", []) => {
implicit_clone::check(cx, name, expr, recv);
},
("unwrap", []) => {
match method_call(recv) {
Some(("get", [recv, get_arg], _)) => {
get_unwrap::check(cx, expr, recv, get_arg, false);
},
Some(("get_mut", [recv, get_arg], _)) => {
get_unwrap::check(cx, expr, recv, get_arg, true);
},
Some(("or", [recv, or_arg], or_span)) => {
or_then_unwrap::check(cx, expr, recv, or_arg, or_span);
},
_ => {},
}
unwrap_used::check(cx, expr, recv, self.allow_unwrap_in_tests);
},
("unwrap_or", [u_arg]) => match method_call(recv) {
Some((arith @ ("checked_add" | "checked_sub" | "checked_mul"), [lhs, rhs], _)) => {
manual_saturating_arithmetic::check(cx, expr, lhs, rhs, u_arg, &arith["checked_".len()..]);
},
Some(("map", [m_recv, m_arg], span)) => {
option_map_unwrap_or::check(cx, expr, m_recv, m_arg, recv, u_arg, span);
},
_ => {},
},
("unwrap_or_else", [u_arg]) => match method_call(recv) {
Some(("map", [recv, map_arg], _))
if map_unwrap_or::check(cx, expr, recv, map_arg, u_arg, self.msrv) => {},
_ => {
unwrap_or_else_default::check(cx, expr, recv, u_arg);
unnecessary_lazy_eval::check(cx, expr, recv, u_arg, "unwrap_or");
},
},
_ => {},
},
("unwrap_or_else", [u_arg]) => match method_call(recv) {
Some(("map", [recv, map_arg], _)) if map_unwrap_or::check(cx, expr, recv, map_arg, u_arg, msrv) => {},
_ => {
unwrap_or_else_default::check(cx, expr, recv, u_arg);
unnecessary_lazy_eval::check(cx, expr, recv, u_arg, "unwrap_or");
},
},
_ => {},
}
}
}
}

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

@ -19,9 +19,9 @@ pub(super) fn check<'tcx>(
as_ref_recv: &hir::Expr<'_>,
map_arg: &hir::Expr<'_>,
is_mut: bool,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) {
if !meets_msrv(msrv, &msrvs::OPTION_AS_DEREF) {
if !meets_msrv(msrv, msrvs::OPTION_AS_DEREF) {
return;
}

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

@ -24,7 +24,7 @@ pub(super) fn check(
self_arg: &Expr<'_>,
pat_arg: &Expr<'_>,
count: u128,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) {
if count < 2 || !cx.typeck_results().expr_ty_adjusted(self_arg).peel_refs().is_str() {
return;
@ -34,7 +34,7 @@ pub(super) fn check(
IterUsageKind::Nth(n) => count > n + 1,
IterUsageKind::NextTuple => count > 2,
};
let manual = count == 2 && meets_msrv(msrv, &msrvs::STR_SPLIT_ONCE);
let manual = count == 2 && meets_msrv(msrv, msrvs::STR_SPLIT_ONCE);
match parse_iter_usage(cx, expr.span.ctxt(), cx.tcx.hir().parent_iter(expr.hir_id)) {
Some(usage) if needless(usage.kind) => lint_needless(cx, method_name, expr, self_arg, pat_arg),

6
clippy_lints/src/methods/unnecessary_to_owned.rs
View file

@ -26,7 +26,7 @@ pub fn check<'tcx>(
expr: &'tcx Expr<'tcx>,
method_name: Symbol,
args: &'tcx [Expr<'tcx>],
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) {
if_chain! {
if let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id);
@ -198,7 +198,7 @@ fn check_into_iter_call_arg(
expr: &Expr<'_>,
method_name: Symbol,
receiver: &Expr<'_>,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) -> bool {
if_chain! {
if let Some(parent) = get_parent_expr(cx, expr);
@ -213,7 +213,7 @@ fn check_into_iter_call_arg(
if unnecessary_iter_cloned::check_for_loop_iter(cx, parent, method_name, receiver, true) {
return true;
}
let cloned_or_copied = if is_copy(cx, item_ty) && meets_msrv(msrv, &msrvs::ITERATOR_COPIED) {
let cloned_or_copied = if is_copy(cx, item_ty) && meets_msrv(msrv, msrvs::ITERATOR_COPIED) {
"copied"
} else {
"cloned"

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

@ -1,4 +1,5 @@
use clippy_utils::diagnostics::span_lint_and_help;
use clippy_utils::is_in_test_function;
use clippy_utils::ty::is_type_diagnostic_item;
use rustc_hir as hir;
use rustc_lint::LateContext;
@ -7,7 +8,7 @@ use rustc_span::sym;
use super::UNWRAP_USED;
/// lint use of `unwrap()` for `Option`s and `Result`s
pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) {
pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>, allow_unwrap_in_tests: bool) {
let obj_ty = cx.typeck_results().expr_ty(recv).peel_refs();
let mess = if is_type_diagnostic_item(cx, obj_ty, sym::Option) {
@ -18,6 +19,10 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr
None
};
if allow_unwrap_in_tests && is_in_test_function(cx.tcx, expr.hir_id) {
return;
}
if let Some((lint, kind, none_value)) = mess {
span_lint_and_help(
cx,

4
clippy_lints/src/missing_const_for_fn.rs
View file

@ -93,7 +93,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingConstForFn {
span: Span,
hir_id: HirId,
) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::CONST_IF_MATCH) {
if !meets_msrv(self.msrv, msrvs::CONST_IF_MATCH) {
return;
}
@ -146,7 +146,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingConstForFn {
let mir = cx.tcx.optimized_mir(def_id);
if let Err((span, err)) = is_min_const_fn(cx.tcx, mir, self.msrv.as_ref()) {
if let Err((span, err)) = is_min_const_fn(cx.tcx, mir, self.msrv) {
if cx.tcx.is_const_fn_raw(def_id.to_def_id()) {
cx.tcx.sess.span_err(span, err.as_ref());
}

2
clippy_lints/src/ranges.rs
View file

@ -193,7 +193,7 @@ impl<'tcx> LateLintPass<'tcx> for Ranges {
check_range_zip_with_len(cx, path, args, expr.span);
},
ExprKind::Binary(ref op, l, r) => {
if meets_msrv(self.msrv.as_ref(), &msrvs::RANGE_CONTAINS) {
if meets_msrv(self.msrv, msrvs::RANGE_CONTAINS) {
check_possible_range_contains(cx, op.node, l, r, expr);
}
},

2
clippy_lints/src/redundant_field_names.rs
View file

@ -51,7 +51,7 @@ impl_lint_pass!(RedundantFieldNames => [REDUNDANT_FIELD_NAMES]);
impl EarlyLintPass for RedundantFieldNames {
fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::FIELD_INIT_SHORTHAND) {
if !meets_msrv(self.msrv, msrvs::FIELD_INIT_SHORTHAND) {
return;
}

2
clippy_lints/src/redundant_static_lifetimes.rs
View file

@ -99,7 +99,7 @@ impl RedundantStaticLifetimes {
impl EarlyLintPass for RedundantStaticLifetimes {
fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) {
if !meets_msrv(self.msrv.as_ref(), &msrvs::STATIC_IN_CONST) {
if !meets_msrv(self.msrv, msrvs::STATIC_IN_CONST) {
return;
}

8
clippy_lints/src/unnested_or_patterns.rs
View file

@ -61,13 +61,13 @@ impl_lint_pass!(UnnestedOrPatterns => [UNNESTED_OR_PATTERNS]);
impl EarlyLintPass for UnnestedOrPatterns {
fn check_arm(&mut self, cx: &EarlyContext<'_>, a: &ast::Arm) {
if meets_msrv(self.msrv.as_ref(), &msrvs::OR_PATTERNS) {
if meets_msrv(self.msrv, msrvs::OR_PATTERNS) {
lint_unnested_or_patterns(cx, &a.pat);
}
}
fn check_expr(&mut self, cx: &EarlyContext<'_>, e: &ast::Expr) {
if meets_msrv(self.msrv.as_ref(), &msrvs::OR_PATTERNS) {
if meets_msrv(self.msrv, msrvs::OR_PATTERNS) {
if let ast::ExprKind::Let(pat, _, _) = &e.kind {
lint_unnested_or_patterns(cx, pat);
}
@ -75,13 +75,13 @@ impl EarlyLintPass for UnnestedOrPatterns {
}
fn check_param(&mut self, cx: &EarlyContext<'_>, p: &ast::Param) {
if meets_msrv(self.msrv.as_ref(), &msrvs::OR_PATTERNS) {
if meets_msrv(self.msrv, msrvs::OR_PATTERNS) {
lint_unnested_or_patterns(cx, &p.pat);
}
}
fn check_local(&mut self, cx: &EarlyContext<'_>, l: &ast::Local) {
if meets_msrv(self.msrv.as_ref(), &msrvs::OR_PATTERNS) {
if meets_msrv(self.msrv, msrvs::OR_PATTERNS) {
lint_unnested_or_patterns(cx, &l.pat);
}
}

6
clippy_lints/src/use_self.rs
View file

@ -198,7 +198,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf {
fn check_ty(&mut self, cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>) {
if_chain! {
if !hir_ty.span.from_expansion();
if meets_msrv(self.msrv.as_ref(), &msrvs::TYPE_ALIAS_ENUM_VARIANTS);
if meets_msrv(self.msrv, msrvs::TYPE_ALIAS_ENUM_VARIANTS);
if let Some(&StackItem::Check {
impl_id,
in_body,
@ -225,7 +225,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf {
fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) {
if_chain! {
if !expr.span.from_expansion();
if meets_msrv(self.msrv.as_ref(), &msrvs::TYPE_ALIAS_ENUM_VARIANTS);
if meets_msrv(self.msrv, msrvs::TYPE_ALIAS_ENUM_VARIANTS);
if let Some(&StackItem::Check { impl_id, .. }) = self.stack.last();
if cx.typeck_results().expr_ty(expr) == cx.tcx.type_of(impl_id);
then {} else { return; }
@ -256,7 +256,7 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf {
fn check_pat(&mut self, cx: &LateContext<'_>, pat: &Pat<'_>) {
if_chain! {
if !pat.span.from_expansion();
if meets_msrv(self.msrv.as_ref(), &msrvs::TYPE_ALIAS_ENUM_VARIANTS);
if meets_msrv(self.msrv, msrvs::TYPE_ALIAS_ENUM_VARIANTS);
if let Some(&StackItem::Check { impl_id, .. }) = self.stack.last();
if let PatKind::Path(QPath::Resolved(_, path)) = pat.kind;
if !matches!(path.res, Res::SelfTy { .. } | Res::Def(DefKind::TyParam, _));

8
clippy_lints/src/utils/conf.rs
View file

@ -316,6 +316,14 @@ define_Conf! {
///
/// The maximum size of a file included via `include_bytes!()` or `include_str!()`, in bytes
(max_include_file_size: u64 = 1_000_000),
/// Lint: EXPECT_USED.
///
/// Whether `expect` should be allowed in test functions
(allow_expect_in_tests: bool = false),
/// Lint: UNWRAP_USED.
///
/// Whether `unwrap` should be allowed in test functions
(allow_unwrap_in_tests: bool = false),
}
/// Search for the configuration file.

4
clippy_utils/src/lib.rs
View file

@ -117,8 +117,8 @@ pub fn parse_msrv(msrv: &str, sess: Option<&Session>, span: Option<Span>) -> Opt
None
}
pub fn meets_msrv(msrv: Option<&RustcVersion>, lint_msrv: &RustcVersion) -> bool {
msrv.map_or(true, |msrv| msrv.meets(*lint_msrv))
pub fn meets_msrv(msrv: Option<RustcVersion>, lint_msrv: RustcVersion) -> bool {
msrv.map_or(true, |msrv| msrv.meets(lint_msrv))
}
#[macro_export]

8
clippy_utils/src/qualify_min_const_fn.rs
View file

@ -19,7 +19,7 @@ use std::borrow::Cow;
type McfResult = Result<(), (Span, Cow<'static, str>)>;
pub fn is_min_const_fn<'a, 'tcx>(tcx: TyCtxt<'tcx>, body: &'a Body<'tcx>, msrv: Option<&RustcVersion>) -> McfResult {
pub fn is_min_const_fn<'a, 'tcx>(tcx: TyCtxt<'tcx>, body: &'a Body<'tcx>, msrv: Option<RustcVersion>) -> McfResult {
let def_id = body.source.def_id();
let mut current = def_id;
loop {
@ -269,7 +269,7 @@ fn check_terminator<'a, 'tcx>(
tcx: TyCtxt<'tcx>,
body: &'a Body<'tcx>,
terminator: &Terminator<'tcx>,
msrv: Option<&RustcVersion>,
msrv: Option<RustcVersion>,
) -> McfResult {
let span = terminator.source_info.span;
match &terminator.kind {
@ -353,7 +353,7 @@ fn check_terminator<'a, 'tcx>(
}
}
fn is_const_fn(tcx: TyCtxt<'_>, def_id: DefId, msrv: Option<&RustcVersion>) -> bool {
fn is_const_fn(tcx: TyCtxt<'_>, def_id: DefId, msrv: Option<RustcVersion>) -> bool {
tcx.is_const_fn(def_id)
&& tcx.lookup_const_stability(def_id).map_or(true, |const_stab| {
if let rustc_attr::StabilityLevel::Stable { since } = const_stab.level {
@ -362,7 +362,7 @@ fn is_const_fn(tcx: TyCtxt<'_>, def_id: DefId, msrv: Option<&RustcVersion>) -> b
// as a part of an unimplemented MSRV check https://github.com/rust-lang/rust/issues/65262.
crate::meets_msrv(
msrv,
&RustcVersion::parse(since.as_str())
RustcVersion::parse(since.as_str())
.expect("`rustc_attr::StabilityLevel::Stable::since` is ill-formatted"),
)
} else {

2
doc/adding_lints.md
View file

@ -432,7 +432,7 @@ The project's MSRV can then be matched against the feature MSRV in the LintPass
using the `meets_msrv` utility function.
``` rust
if !meets_msrv(self.msrv.as_ref(), &msrvs::STR_STRIP_PREFIX) {
if !meets_msrv(self.msrv, msrvs::STR_STRIP_PREFIX) {
return;
}
```

1
tests/ui-toml/expect_used/clippy.toml Normal file
View file

@ -0,0 +1 @@
allow-expect-in-tests = true

29
tests/ui-toml/expect_used/expect_used.rs Normal file
View file

@ -0,0 +1,29 @@
// compile-flags: --test
#![warn(clippy::expect_used)]
fn expect_option() {
let opt = Some(0);
let _ = opt.expect("");
}
fn expect_result() {
let res: Result<u8, ()> = Ok(0);
let _ = res.expect("");
}
fn main() {
expect_option();
expect_result();
}
#[test]
fn test_expect_option() {
let opt = Some(0);
let _ = opt.expect("");
}
#[test]
fn test_expect_result() {
let res: Result<u8, ()> = Ok(0);
let _ = res.expect("");
}

19
tests/ui-toml/expect_used/expect_used.stderr Normal file
View file

@ -0,0 +1,19 @@
error: used `expect()` on `an Option` value
--> $DIR/expect_used.rs:6:13
|
LL | let _ = opt.expect("");
| ^^^^^^^^^^^^^^
|
= note: `-D clippy::expect-used` implied by `-D warnings`
= help: if this value is an `None`, it will panic
error: used `expect()` on `a Result` value
--> $DIR/expect_used.rs:11:13
|
LL | let _ = res.expect("");
| ^^^^^^^^^^^^^^
|
= help: if this value is an `Err`, it will panic
error: aborting due to 2 previous errors

2
tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr
View file

@ -1,4 +1,4 @@
error: error reading Clippy's configuration file `$DIR/clippy.toml`: unknown field `foobar`, expected one of `avoid-breaking-exported-api`, `msrv`, `blacklisted-names`, `cognitive-complexity-threshold`, `cyclomatic-complexity-threshold`, `doc-valid-idents`, `too-many-arguments-threshold`, `type-complexity-threshold`, `single-char-binding-names-threshold`, `too-large-for-stack`, `enum-variant-name-threshold`, `enum-variant-size-threshold`, `verbose-bit-mask-threshold`, `literal-representation-threshold`, `trivial-copy-size-limit`, `pass-by-value-size-limit`, `too-many-lines-threshold`, `array-size-threshold`, `vec-box-size-threshold`, `max-trait-bounds`, `max-struct-bools`, `max-fn-params-bools`, `warn-on-all-wildcard-imports`, `disallowed-methods`, `disallowed-types`, `unreadable-literal-lint-fractions`, `upper-case-acronyms-aggressive`, `cargo-ignore-publish`, `standard-macro-braces`, `enforced-import-renames`, `allowed-scripts`, `enable-raw-pointer-heuristic-for-send`, `max-suggested-slice-pattern-length`, `await-holding-invalid-types`, `max-include-file-size`, `third-party` at line 5 column 1
error: error reading Clippy's configuration file `$DIR/clippy.toml`: unknown field `foobar`, expected one of `avoid-breaking-exported-api`, `msrv`, `blacklisted-names`, `cognitive-complexity-threshold`, `cyclomatic-complexity-threshold`, `doc-valid-idents`, `too-many-arguments-threshold`, `type-complexity-threshold`, `single-char-binding-names-threshold`, `too-large-for-stack`, `enum-variant-name-threshold`, `enum-variant-size-threshold`, `verbose-bit-mask-threshold`, `literal-representation-threshold`, `trivial-copy-size-limit`, `pass-by-value-size-limit`, `too-many-lines-threshold`, `array-size-threshold`, `vec-box-size-threshold`, `max-trait-bounds`, `max-struct-bools`, `max-fn-params-bools`, `warn-on-all-wildcard-imports`, `disallowed-methods`, `disallowed-types`, `unreadable-literal-lint-fractions`, `upper-case-acronyms-aggressive`, `cargo-ignore-publish`, `standard-macro-braces`, `enforced-import-renames`, `allowed-scripts`, `enable-raw-pointer-heuristic-for-send`, `max-suggested-slice-pattern-length`, `await-holding-invalid-types`, `max-include-file-size`, `allow-expect-in-tests`, `allow-unwrap-in-tests`, `third-party` at line 5 column 1
error: aborting due to previous error

1
tests/ui-toml/unwrap_used/clippy.toml Normal file
View file

@ -0,0 +1 @@
allow-unwrap-in-tests = true

74
tests/ui-toml/unwrap_used/unwrap_used.rs Normal file
View file

@ -0,0 +1,74 @@
// compile-flags: --test
#![allow(unused_mut, clippy::from_iter_instead_of_collect)]
#![warn(clippy::unwrap_used)]
#![deny(clippy::get_unwrap)]
use std::collections::BTreeMap;
use std::collections::HashMap;
use std::collections::VecDeque;
use std::iter::FromIterator;
struct GetFalsePositive {
arr: [u32; 3],
}
impl GetFalsePositive {
fn get(&self, pos: usize) -> Option<&u32> {
self.arr.get(pos)
}
fn get_mut(&mut self, pos: usize) -> Option<&mut u32> {
self.arr.get_mut(pos)
}
}
fn main() {
let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
let mut some_slice = &mut [0, 1, 2, 3];
let mut some_vec = vec![0, 1, 2, 3];
let mut some_vecdeque: VecDeque<_> = some_vec.iter().cloned().collect();
let mut some_hashmap: HashMap<u8, char> = HashMap::from_iter(vec![(1, 'a'), (2, 'b')]);
let mut some_btreemap: BTreeMap<u8, char> = BTreeMap::from_iter(vec![(1, 'a'), (2, 'b')]);
let mut false_positive = GetFalsePositive { arr: [0, 1, 2] };
{
// Test `get().unwrap()`
let _ = boxed_slice.get(1).unwrap();
let _ = some_slice.get(0).unwrap();
let _ = some_vec.get(0).unwrap();
let _ = some_vecdeque.get(0).unwrap();
let _ = some_hashmap.get(&1).unwrap();
let _ = some_btreemap.get(&1).unwrap();
#[allow(clippy::unwrap_used)]
let _ = false_positive.get(0).unwrap();
// Test with deref
let _: u8 = *boxed_slice.get(1).unwrap();
}
{
// Test `get_mut().unwrap()`
*boxed_slice.get_mut(0).unwrap() = 1;
*some_slice.get_mut(0).unwrap() = 1;
*some_vec.get_mut(0).unwrap() = 1;
*some_vecdeque.get_mut(0).unwrap() = 1;
// Check false positives
#[allow(clippy::unwrap_used)]
{
*some_hashmap.get_mut(&1).unwrap() = 'b';
*some_btreemap.get_mut(&1).unwrap() = 'b';
*false_positive.get_mut(0).unwrap() = 1;
}
}
{
// Test `get().unwrap().foo()` and `get_mut().unwrap().bar()`
let _ = some_vec.get(0..1).unwrap().to_vec();
let _ = some_vec.get_mut(0..1).unwrap().to_vec();
}
}
#[test]
fn test() {
let boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
let _ = boxed_slice.get(1).unwrap();
}

197
tests/ui-toml/unwrap_used/unwrap_used.stderr Normal file
View file

@ -0,0 +1,197 @@
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:36:17
|
LL | let _ = boxed_slice.get(1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&boxed_slice[1]`
|
note: the lint level is defined here
--> $DIR/unwrap_used.rs:5:9
|
LL | #![deny(clippy::get_unwrap)]
| ^^^^^^^^^^^^^^^^^^
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:36:17
|
LL | let _ = boxed_slice.get(1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `-D clippy::unwrap-used` implied by `-D warnings`
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:37:17
|
LL | let _ = some_slice.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_slice[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:37:17
|
LL | let _ = some_slice.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:38:17
|
LL | let _ = some_vec.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vec[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:38:17
|
LL | let _ = some_vec.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:39:17
|
LL | let _ = some_vecdeque.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_vecdeque[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:39:17
|
LL | let _ = some_vecdeque.get(0).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:40:17
|
LL | let _ = some_hashmap.get(&1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_hashmap[&1]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:40:17
|
LL | let _ = some_hashmap.get(&1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a BTreeMap. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:41:17
|
LL | let _ = some_btreemap.get(&1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&some_btreemap[&1]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:41:17
|
LL | let _ = some_btreemap.get(&1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:45:21
|
LL | let _: u8 = *boxed_slice.get(1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `boxed_slice[1]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:45:22
|
LL | let _: u8 = *boxed_slice.get(1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:50:9
|
LL | *boxed_slice.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `boxed_slice[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:50:10
|
LL | *boxed_slice.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get_mut().unwrap()` on a slice. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:51:9
|
LL | *some_slice.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `some_slice[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:51:10
|
LL | *some_slice.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:52:9
|
LL | *some_vec.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `some_vec[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:52:10
|
LL | *some_vec.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get_mut().unwrap()` on a VecDeque. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:53:9
|
LL | *some_vecdeque.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `some_vecdeque[0]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:53:10
|
LL | *some_vecdeque.get_mut(0).unwrap() = 1;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:65:17
|
LL | let _ = some_vec.get(0..1).unwrap().to_vec();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `some_vec[0..1]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:65:17
|
LL | let _ = some_vec.get(0..1).unwrap().to_vec();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:66:17
|
LL | let _ = some_vec.get_mut(0..1).unwrap().to_vec();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `some_vec[0..1]`
error: used `unwrap()` on `an Option` value
--> $DIR/unwrap_used.rs:66:17
|
LL | let _ = some_vec.get_mut(0..1).unwrap().to_vec();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: if you don't want to handle the `None` case gracefully, consider using `expect()` to provide a better panic message
error: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
--> $DIR/unwrap_used.rs:73:13
|
LL | let _ = boxed_slice.get(1).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&boxed_slice[1]`
error: aborting due to 27 previous errors