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Move MatchStrCaseMismatch into Matches lint pass

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This commit is contained in:
Jason Newcomb
2022-06-03 13:16:02 -04:00
parent 3d8d734150
commit 8c8a52eeeb
6 changed files with 53 additions and 58 deletions
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clippy_lints/src/lib.register_all.rs
+1 -1
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@@ -140,7 +140,6 @@
LintId::of(map_unit_fn::OPTION_MAP_UNIT_FN),
LintId::of(map_unit_fn::RESULT_MAP_UNIT_FN),
LintId::of(match_result_ok::MATCH_RESULT_OK),
LintId::of(match_str_case_mismatch::MATCH_STR_CASE_MISMATCH),
LintId::of(matches::COLLAPSIBLE_MATCH),
LintId::of(matches::INFALLIBLE_DESTRUCTURING_MATCH),
LintId::of(matches::MANUAL_UNWRAP_OR),
@@ -149,6 +148,7 @@
LintId::of(matches::MATCH_OVERLAPPING_ARM),
LintId::of(matches::MATCH_REF_PATS),
LintId::of(matches::MATCH_SINGLE_BINDING),
LintId::of(matches::MATCH_STR_CASE_MISMATCH),
LintId::of(matches::NEEDLESS_MATCH),
LintId::of(matches::REDUNDANT_PATTERN_MATCHING),
LintId::of(matches::SINGLE_MATCH),
clippy_lints/src/lib.register_correctness.rs
+1 -1
View File
@@ -39,7 +39,7 @@
LintId::of(loops::ITER_NEXT_LOOP),
LintId::of(loops::NEVER_LOOP),
LintId::of(loops::WHILE_IMMUTABLE_CONDITION),
LintId::of(match_str_case_mismatch::MATCH_STR_CASE_MISMATCH),
LintId::of(matches::MATCH_STR_CASE_MISMATCH),
LintId::of(mem_replace::MEM_REPLACE_WITH_UNINIT),
LintId::of(methods::CLONE_DOUBLE_REF),
LintId::of(methods::ITERATOR_STEP_BY_ZERO),
clippy_lints/src/lib.register_lints.rs
+1 -1
View File
@@ -259,7 +259,6 @@
map_unit_fn::OPTION_MAP_UNIT_FN,
map_unit_fn::RESULT_MAP_UNIT_FN,
match_result_ok::MATCH_RESULT_OK,
match_str_case_mismatch::MATCH_STR_CASE_MISMATCH,
matches::COLLAPSIBLE_MATCH,
matches::INFALLIBLE_DESTRUCTURING_MATCH,
matches::MANUAL_UNWRAP_OR,
@@ -271,6 +270,7 @@
matches::MATCH_REF_PATS,
matches::MATCH_SAME_ARMS,
matches::MATCH_SINGLE_BINDING,
matches::MATCH_STR_CASE_MISMATCH,
matches::MATCH_WILDCARD_FOR_SINGLE_VARIANTS,
matches::MATCH_WILD_ERR_ARM,
matches::NEEDLESS_MATCH,
clippy_lints/src/lib.rs
-2
View File
@@ -287,7 +287,6 @@ macro_rules! declare_clippy_lint {
mod map_err_ignore;
mod map_unit_fn;
mod match_result_ok;
mod match_str_case_mismatch;
mod matches;
mod mem_forget;
mod mem_replace;
@@ -875,7 +874,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
))
});
store.register_late_pass(move || Box::new(undocumented_unsafe_blocks::UndocumentedUnsafeBlocks));
store.register_late_pass(|| Box::new(match_str_case_mismatch::MatchStrCaseMismatch));
store.register_late_pass(move || Box::new(format_args::FormatArgs));
store.register_late_pass(|| Box::new(trailing_empty_array::TrailingEmptyArray));
store.register_early_pass(|| Box::new(octal_escapes::OctalEscapes));
clippy_lints/src/match_str_case_mismatch.rs → clippy_lints/src/matches/match_str_case_mismatch.rs
+16 -53
View File
@@ -3,46 +3,13 @@
use rustc_ast::ast::LitKind;
use rustc_errors::Applicability;
use rustc_hir::intravisit::{walk_expr, Visitor};
use rustc_hir::{Arm, Expr, ExprKind, MatchSource, PatKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::lint::in_external_macro;
use rustc_hir::{Arm, Expr, ExprKind, PatKind};
use rustc_lint::LateContext;
use rustc_middle::ty;
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::symbol::Symbol;
use rustc_span::{sym, Span};
declare_clippy_lint! {
/// ### What it does
/// Checks for `match` expressions modifying the case of a string with non-compliant arms
///
/// ### Why is this bad?
/// The arm is unreachable, which is likely a mistake
///
/// ### Example
/// ```rust
/// # let text = "Foo";
/// match &*text.to_ascii_lowercase() {
/// "foo" => {},
/// "Bar" => {},
/// _ => {},
/// }
/// ```
/// Use instead:
/// ```rust
/// # let text = "Foo";
/// match &*text.to_ascii_lowercase() {
/// "foo" => {},
/// "bar" => {},
/// _ => {},
/// }
/// ```
#[clippy::version = "1.58.0"]
pub MATCH_STR_CASE_MISMATCH,
correctness,
"creation of a case altering match expression with non-compliant arms"
}
declare_lint_pass!(MatchStrCaseMismatch => [MATCH_STR_CASE_MISMATCH]);
use super::MATCH_STR_CASE_MISMATCH;
#[derive(Debug)]
enum CaseMethod {
@@ -52,25 +19,21 @@ enum CaseMethod {
AsciiUppercase,
}
impl<'tcx> LateLintPass<'tcx> for MatchStrCaseMismatch {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
if !in_external_macro(cx.tcx.sess, expr.span);
if let ExprKind::Match(match_expr, arms, MatchSource::Normal) = expr.kind;
if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty(match_expr).kind();
if let ty::Str = ty.kind();
then {
let mut visitor = MatchExprVisitor {
cx,
case_method: None,
};
pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, scrutinee: &'tcx Expr<'_>, arms: &'tcx [Arm<'_>]) {
if_chain! {
if let ty::Ref(_, ty, _) = cx.typeck_results().expr_ty(scrutinee).kind();
if let ty::Str = ty.kind();
then {
let mut visitor = MatchExprVisitor {
cx,
case_method: None,
};
visitor.visit_expr(match_expr);
visitor.visit_expr(scrutinee);
if let Some(case_method) = visitor.case_method {
if let Some((bad_case_span, bad_case_sym)) = verify_case(&case_method, arms) {
lint(cx, &case_method, bad_case_span, bad_case_sym.as_str());
}
if let Some(case_method) = visitor.case_method {
if let Some((bad_case_span, bad_case_sym)) = verify_case(&case_method, arms) {
lint(cx, &case_method, bad_case_span, bad_case_sym.as_str());
}
}
}
clippy_lints/src/matches/mod.rs
+34
View File
@@ -18,6 +18,7 @@
mod match_ref_pats;
mod match_same_arms;
mod match_single_binding;
mod match_str_case_mismatch;
mod match_wild_enum;
mod match_wild_err_arm;
mod needless_match;
@@ -716,6 +717,37 @@
"matching on vector elements can panic"
}
declare_clippy_lint! {
/// ### What it does
/// Checks for `match` expressions modifying the case of a string with non-compliant arms
///
/// ### Why is this bad?
/// The arm is unreachable, which is likely a mistake
///
/// ### Example
/// ```rust
/// # let text = "Foo";
/// match &*text.to_ascii_lowercase() {
/// "foo" => {},
/// "Bar" => {},
/// _ => {},
/// }
/// ```
/// Use instead:
/// ```rust
/// # let text = "Foo";
/// match &*text.to_ascii_lowercase() {
/// "foo" => {},
/// "bar" => {},
/// _ => {},
/// }
/// ```
#[clippy::version = "1.58.0"]
pub MATCH_STR_CASE_MISMATCH,
correctness,
"creation of a case altering match expression with non-compliant arms"
}
#[derive(Default)]
pub struct Matches {
msrv: Option<RustcVersion>,
@@ -753,6 +785,7 @@ pub fn new(msrv: Option<RustcVersion>) -> Self {
COLLAPSIBLE_MATCH,
MANUAL_UNWRAP_OR,
MATCH_ON_VEC_ITEMS,
MATCH_STR_CASE_MISMATCH,
]);
impl<'tcx> LateLintPass<'tcx> for Matches {
@@ -790,6 +823,7 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
match_as_ref::check(cx, ex, arms, expr);
needless_match::check_match(cx, ex, arms, expr);
match_on_vec_items::check(cx, ex);
match_str_case_mismatch::check(cx, ex, arms);
if !in_constant(cx, expr.hir_id) {
manual_unwrap_or::check(cx, expr, ex, arms);