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Remove needless_question_mark MSRV

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This commit is contained in:
Cameron Steffen 2021-04-26 15:49:25 -05:00
parent a362a4d1d0
commit 33ed8b5b24
6 changed files with 13 additions and 199 deletions
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2
clippy_lints/src/lib.rs
View File

@ -1076,7 +1076,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
store.register_late_pass(move || box from_over_into::FromOverInto::new(msrv));
store.register_late_pass(move || box use_self::UseSelf::new(msrv));
store.register_late_pass(move || box missing_const_for_fn::MissingConstForFn::new(msrv));
store.register_late_pass(move || box needless_question_mark::NeedlessQuestionMark::new(msrv));
store.register_late_pass(move || box needless_question_mark::NeedlessQuestionMark);
store.register_late_pass(move || box casts::Casts::new(msrv));
store.register_early_pass(move || box unnested_or_patterns::UnnestedOrPatterns::new(msrv));

42
clippy_lints/src/needless_question_mark.rs
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@ -1,15 +1,13 @@
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::is_lang_ctor;
use clippy_utils::source::snippet;
use clippy_utils::ty::is_type_diagnostic_item;
use clippy_utils::{differing_macro_contexts, meets_msrv};
use clippy_utils::{differing_macro_contexts, is_lang_ctor};
use if_chain::if_chain;
use rustc_errors::Applicability;
use rustc_hir::LangItem::{OptionSome, ResultOk};
use rustc_hir::{Body, Expr, ExprKind, LangItem, MatchSource, QPath};
use rustc_lint::{LateContext, LateLintPass, LintContext};
use rustc_semver::RustcVersion;
use rustc_session::{declare_tool_lint, impl_lint_pass};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::sym;
declare_clippy_lint! {
@ -63,21 +61,7 @@ declare_clippy_lint! {
"Suggest `value.inner_option` instead of `Some(value.inner_option?)`. The same goes for `Result<T, E>`."
}
const NEEDLESS_QUESTION_MARK_RESULT_MSRV: RustcVersion = RustcVersion::new(1, 13, 0);
const NEEDLESS_QUESTION_MARK_OPTION_MSRV: RustcVersion = RustcVersion::new(1, 22, 0);
pub struct NeedlessQuestionMark {
msrv: Option<RustcVersion>,
}
impl NeedlessQuestionMark {
#[must_use]
pub fn new(msrv: Option<RustcVersion>) -> Self {
Self { msrv }
}
}
impl_lint_pass!(NeedlessQuestionMark => [NEEDLESS_QUESTION_MARK]);
declare_lint_pass!(NeedlessQuestionMark => [NEEDLESS_QUESTION_MARK]);
#[derive(Debug)]
enum SomeOkCall<'a> {
@ -111,7 +95,7 @@ impl LateLintPass<'_> for NeedlessQuestionMark {
_ => return,
};
if let Some(ok_some_call) = is_some_or_ok_call(self, cx, e) {
if let Some(ok_some_call) = is_some_or_ok_call(cx, e) {
emit_lint(cx, &ok_some_call);
}
}
@ -127,14 +111,12 @@ impl LateLintPass<'_> for NeedlessQuestionMark {
if_chain! {
if let Some(expr) = expr_opt;
if let Some(ok_some_call) = is_some_or_ok_call(self, cx, expr);
if let Some(ok_some_call) = is_some_or_ok_call(cx, expr);
then {
emit_lint(cx, &ok_some_call);
}
};
}
extract_msrv_attr!(LateContext);
}
fn emit_lint(cx: &LateContext<'_>, expr: &SomeOkCall<'_>) {
@ -153,11 +135,7 @@ fn emit_lint(cx: &LateContext<'_>, expr: &SomeOkCall<'_>) {
);
}
fn is_some_or_ok_call<'a>(
nqml: &NeedlessQuestionMark,
cx: &'a LateContext<'_>,
expr: &'a Expr<'_>,
) -> Option<SomeOkCall<'a>> {
fn is_some_or_ok_call<'a>(cx: &'a LateContext<'_>, expr: &'a Expr<'_>) -> Option<SomeOkCall<'a>> {
if_chain! {
// Check outer expression matches CALL_IDENT(ARGUMENT) format
if let ExprKind::Call(path, args) = &expr.kind;
@ -188,8 +166,7 @@ fn is_some_or_ok_call<'a>(
let inner_is_some = is_type_diagnostic_item(cx, inner_ty, sym::option_type);
// Check for Option MSRV
let meets_option_msrv = meets_msrv(nqml.msrv.as_ref(), &NEEDLESS_QUESTION_MARK_OPTION_MSRV);
if outer_is_some && inner_is_some && meets_option_msrv {
if outer_is_some && inner_is_some {
return Some(SomeOkCall::SomeCall(expr, inner_expr));
}
@ -202,8 +179,7 @@ fn is_some_or_ok_call<'a>(
let does_not_call_from = !has_implicit_error_from(cx, expr, inner_expr);
// Must meet Result MSRV
let meets_result_msrv = meets_msrv(nqml.msrv.as_ref(), &NEEDLESS_QUESTION_MARK_RESULT_MSRV);
if outer_is_result && inner_is_result && does_not_call_from && meets_result_msrv {
if outer_is_result && inner_is_result && does_not_call_from {
return Some(SomeOkCall::OkCall(expr, inner_expr));
}
}

2
clippy_lints/src/utils/conf.rs
View File

@ -106,7 +106,7 @@ macro_rules! define_Conf {
pub use self::helpers::Conf;
define_Conf! {
/// Lint: CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, NEEDLESS_QUESTION_MARK, PTR_AS_PTR. The minimum rust version that the project supports
/// Lint: CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR. The minimum rust version that the project supports
(msrv, "msrv": Option<String>, None),
/// Lint: BLACKLISTED_NAME. The list of blacklisted names to lint about. NB: `bar` is not here since it has legitimate uses
(blacklisted_names, "blacklisted_names": Vec<String>, ["foo", "baz", "quux"].iter().map(ToString::to_string).collect()),

72
tests/ui/needless_question_mark.fixed
View File

@ -96,78 +96,6 @@ where
fn main() {}
mod question_mark_none {
#![clippy::msrv = "1.12.0"]
fn needless_question_mark_option() -> Option<usize> {
struct TO {
magic: Option<usize>,
}
let to = TO { magic: None };
Some(to.magic?) // should not be triggered
}
fn needless_question_mark_result() -> Result<usize, bool> {
struct TO {
magic: Result<usize, bool>,
}
let to = TO { magic: Ok(1_usize) };
Ok(to.magic?) // should not be triggered
}
fn main() {
needless_question_mark_option();
needless_question_mark_result();
}
}
mod question_mark_result {
#![clippy::msrv = "1.21.0"]
fn needless_question_mark_option() -> Option<usize> {
struct TO {
magic: Option<usize>,
}
let to = TO { magic: None };
Some(to.magic?) // should not be triggered
}
fn needless_question_mark_result() -> Result<usize, bool> {
struct TO {
magic: Result<usize, bool>,
}
let to = TO { magic: Ok(1_usize) };
to.magic // should be triggered
}
fn main() {
needless_question_mark_option();
needless_question_mark_result();
}
}
mod question_mark_both {
#![clippy::msrv = "1.22.0"]
fn needless_question_mark_option() -> Option<usize> {
struct TO {
magic: Option<usize>,
}
let to = TO { magic: None };
to.magic // should be triggered
}
fn needless_question_mark_result() -> Result<usize, bool> {
struct TO {
magic: Result<usize, bool>,
}
let to = TO { magic: Ok(1_usize) };
to.magic // should be triggered
}
fn main() {
needless_question_mark_option();
needless_question_mark_result();
}
}
// #6921 if a macro wraps an expr in Some( ) and the ? is in the macro use,
// the suggestion fails to apply; do not lint
macro_rules! some_in_macro {

72
tests/ui/needless_question_mark.rs
View File

@ -96,78 +96,6 @@ where
fn main() {}
mod question_mark_none {
#![clippy::msrv = "1.12.0"]
fn needless_question_mark_option() -> Option<usize> {
struct TO {
magic: Option<usize>,
}
let to = TO { magic: None };
Some(to.magic?) // should not be triggered
}
fn needless_question_mark_result() -> Result<usize, bool> {
struct TO {
magic: Result<usize, bool>,
}
let to = TO { magic: Ok(1_usize) };
Ok(to.magic?) // should not be triggered
}
fn main() {
needless_question_mark_option();
needless_question_mark_result();
}
}
mod question_mark_result {
#![clippy::msrv = "1.21.0"]
fn needless_question_mark_option() -> Option<usize> {
struct TO {
magic: Option<usize>,
}
let to = TO { magic: None };
Some(to.magic?) // should not be triggered
}
fn needless_question_mark_result() -> Result<usize, bool> {
struct TO {
magic: Result<usize, bool>,
}
let to = TO { magic: Ok(1_usize) };
Ok(to.magic?) // should be triggered
}
fn main() {
needless_question_mark_option();
needless_question_mark_result();
}
}
mod question_mark_both {
#![clippy::msrv = "1.22.0"]
fn needless_question_mark_option() -> Option<usize> {
struct TO {
magic: Option<usize>,
}
let to = TO { magic: None };
Some(to.magic?) // should be triggered
}
fn needless_question_mark_result() -> Result<usize, bool> {
struct TO {
magic: Result<usize, bool>,
}
let to = TO { magic: Ok(1_usize) };
Ok(to.magic?) // should be triggered
}
fn main() {
needless_question_mark_option();
needless_question_mark_result();
}
}
// #6921 if a macro wraps an expr in Some( ) and the ? is in the macro use,
// the suggestion fails to apply; do not lint
macro_rules! some_in_macro {

22
tests/ui/needless_question_mark.stderr
View File

@ -67,25 +67,7 @@ LL | return Ok(t.magic?);
| ^^^^^^^^^^^^ help: try: `t.magic`
error: question mark operator is useless here
--> $DIR/needless_question_mark.rs:138:9
|
LL | Ok(to.magic?) // should be triggered
| ^^^^^^^^^^^^^ help: try: `to.magic`
error: question mark operator is useless here
--> $DIR/needless_question_mark.rs:154:9
|
LL | Some(to.magic?) // should be triggered
| ^^^^^^^^^^^^^^^ help: try: `to.magic`
error: question mark operator is useless here
--> $DIR/needless_question_mark.rs:162:9
|
LL | Ok(to.magic?) // should be triggered
| ^^^^^^^^^^^^^ help: try: `to.magic`
error: question mark operator is useless here
--> $DIR/needless_question_mark.rs:187:27
--> $DIR/needless_question_mark.rs:115:27
|
LL | || -> Option<_> { Some(Some($expr)?) }()
| ^^^^^^^^^^^^^^^^^^ help: try: `Some($expr)`
@ -95,5 +77,5 @@ LL | let _x = some_and_qmark_in_macro!(x?);
|
= note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to 15 previous errors
error: aborting due to 12 previous errors