Auto merge of rust-lang#8621 - Jarcho:eval_order_dependence_4637, r=Jarcho

bors · bors · commit 1c0a61e7ce7d · 2022-05-15T21:36:24.000Z
Rename `eval_order_dependence` to `mixed_read_write_expression`, move to nursery As per the [reference](https://doc.rust-lang.org/1.51.0/reference/expressions.html#evaluation-order-of-operands) evaluation order is now defined. I'm pretty sure rust always compiled with this evaluation order anyways so there's no reason the put an msrv limit on the lint. changelog: Rename `eval_order_dependence` to `mixed_read_write_expression`, move to nursery
diff --git a/CHANGELOG.md b/CHANGELOG.md
diff --git a/clippy_dev/src/update_lints.rs b/clippy_dev/src/update_lints.rs
@@ -66,8 +66,13 @@ fn generate_lint_files(
         |res| {
             for lint in usable_lints
                 .iter()
-                .map(|l| &l.name)
-                .chain(deprecated_lints.iter().map(|l| &l.name))
+                .map(|l| &*l.name)
+                .chain(deprecated_lints.iter().map(|l| &*l.name))
+                .chain(
+                    renamed_lints
+                        .iter()
+                        .map(|l| l.old_name.strip_prefix("clippy::").unwrap_or(&l.old_name)),
+                )
                 .sorted()
             {
                 writeln!(res, "[`{}`]: {}#{}", lint, DOCS_LINK, lint).unwrap();
diff --git a/clippy_lints/src/lib.register_all.rs b/clippy_lints/src/lib.register_all.rs
@@ -71,8 +71,6 @@ store.register_group(true, "clippy::all", Some("clippy_all"), vec![
     LintId::of(erasing_op::ERASING_OP),
     LintId::of(escape::BOXED_LOCAL),
     LintId::of(eta_reduction::REDUNDANT_CLOSURE),
-    LintId::of(eval_order_dependence::DIVERGING_SUB_EXPRESSION),
-    LintId::of(eval_order_dependence::EVAL_ORDER_DEPENDENCE),
     LintId::of(explicit_write::EXPLICIT_WRITE),
     LintId::of(float_equality_without_abs::FLOAT_EQUALITY_WITHOUT_ABS),
     LintId::of(float_literal::EXCESSIVE_PRECISION),
@@ -230,6 +228,7 @@ store.register_group(true, "clippy::all", Some("clippy_all"), vec![
     LintId::of(misc_early::REDUNDANT_PATTERN),
     LintId::of(misc_early::UNNEEDED_WILDCARD_PATTERN),
     LintId::of(misc_early::ZERO_PREFIXED_LITERAL),
+    LintId::of(mixed_read_write_in_expression::DIVERGING_SUB_EXPRESSION),
     LintId::of(mut_key::MUTABLE_KEY_TYPE),
     LintId::of(mut_mutex_lock::MUT_MUTEX_LOCK),
     LintId::of(mut_reference::UNNECESSARY_MUT_PASSED),
diff --git a/clippy_lints/src/lib.register_complexity.rs b/clippy_lints/src/lib.register_complexity.rs
@@ -12,7 +12,6 @@ store.register_group(true, "clippy::complexity", Some("clippy_complexity"), vec!
     LintId::of(double_comparison::DOUBLE_COMPARISONS),
     LintId::of(double_parens::DOUBLE_PARENS),
     LintId::of(duration_subsec::DURATION_SUBSEC),
-    LintId::of(eval_order_dependence::DIVERGING_SUB_EXPRESSION),
     LintId::of(explicit_write::EXPLICIT_WRITE),
     LintId::of(format::USELESS_FORMAT),
     LintId::of(functions::TOO_MANY_ARGUMENTS),
@@ -59,6 +58,7 @@ store.register_group(true, "clippy::complexity", Some("clippy_complexity"), vec!
     LintId::of(misc::SHORT_CIRCUIT_STATEMENT),
     LintId::of(misc_early::UNNEEDED_WILDCARD_PATTERN),
     LintId::of(misc_early::ZERO_PREFIXED_LITERAL),
+    LintId::of(mixed_read_write_in_expression::DIVERGING_SUB_EXPRESSION),
     LintId::of(needless_arbitrary_self_type::NEEDLESS_ARBITRARY_SELF_TYPE),
     LintId::of(needless_bool::BOOL_COMPARISON),
     LintId::of(needless_bool::NEEDLESS_BOOL),
diff --git a/clippy_lints/src/lib.register_lints.rs b/clippy_lints/src/lib.register_lints.rs
@@ -151,8 +151,6 @@ store.register_lints(&[
     escape::BOXED_LOCAL,
     eta_reduction::REDUNDANT_CLOSURE,
     eta_reduction::REDUNDANT_CLOSURE_FOR_METHOD_CALLS,
-    eval_order_dependence::DIVERGING_SUB_EXPRESSION,
-    eval_order_dependence::EVAL_ORDER_DEPENDENCE,
     excessive_bools::FN_PARAMS_EXCESSIVE_BOOLS,
     excessive_bools::STRUCT_EXCESSIVE_BOOLS,
     exhaustive_items::EXHAUSTIVE_ENUMS,
@@ -383,6 +381,8 @@ store.register_lints(&[
     missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
     missing_enforced_import_rename::MISSING_ENFORCED_IMPORT_RENAMES,
     missing_inline::MISSING_INLINE_IN_PUBLIC_ITEMS,
+    mixed_read_write_in_expression::DIVERGING_SUB_EXPRESSION,
+    mixed_read_write_in_expression::MIXED_READ_WRITE_IN_EXPRESSION,
     module_style::MOD_MODULE_FILES,
     module_style::SELF_NAMED_MODULE_FILES,
     modulo_arithmetic::MODULO_ARITHMETIC,
diff --git a/clippy_lints/src/lib.register_restriction.rs b/clippy_lints/src/lib.register_restriction.rs
@@ -46,6 +46,7 @@ store.register_group(true, "clippy::restriction", Some("clippy_restriction"), ve
     LintId::of(missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS),
     LintId::of(missing_enforced_import_rename::MISSING_ENFORCED_IMPORT_RENAMES),
     LintId::of(missing_inline::MISSING_INLINE_IN_PUBLIC_ITEMS),
+    LintId::of(mixed_read_write_in_expression::MIXED_READ_WRITE_IN_EXPRESSION),
     LintId::of(module_style::MOD_MODULE_FILES),
     LintId::of(module_style::SELF_NAMED_MODULE_FILES),
     LintId::of(modulo_arithmetic::MODULO_ARITHMETIC),
diff --git a/clippy_lints/src/lib.register_suspicious.rs b/clippy_lints/src/lib.register_suspicious.rs
@@ -15,7 +15,6 @@ store.register_group(true, "clippy::suspicious", Some("clippy_suspicious"), vec!
     LintId::of(drop_forget_ref::DROP_NON_DROP),
     LintId::of(drop_forget_ref::FORGET_NON_DROP),
     LintId::of(duplicate_mod::DUPLICATE_MOD),
-    LintId::of(eval_order_dependence::EVAL_ORDER_DEPENDENCE),
     LintId::of(float_equality_without_abs::FLOAT_EQUALITY_WITHOUT_ABS),
     LintId::of(format_impl::PRINT_IN_FORMAT_IMPL),
     LintId::of(formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING),
diff --git a/clippy_lints/src/lib.rs b/clippy_lints/src/lib.rs
@@ -225,7 +225,6 @@ mod equatable_if_let;
 mod erasing_op;
 mod escape;
 mod eta_reduction;
-mod eval_order_dependence;
 mod excessive_bools;
 mod exhaustive_items;
 mod exit;
@@ -301,6 +300,7 @@ mod missing_const_for_fn;
 mod missing_doc;
 mod missing_enforced_import_rename;
 mod missing_inline;
+mod mixed_read_write_in_expression;
 mod module_style;
 mod modulo_arithmetic;
 mod mut_key;
@@ -680,7 +680,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| Box::new(arithmetic::Arithmetic::default()));
     store.register_late_pass(|| Box::new(assign_ops::AssignOps));
     store.register_late_pass(|| Box::new(let_if_seq::LetIfSeq));
-    store.register_late_pass(|| Box::new(eval_order_dependence::EvalOrderDependence));
+    store.register_late_pass(|| Box::new(mixed_read_write_in_expression::EvalOrderDependence));
     store.register_late_pass(|| Box::new(missing_doc::MissingDoc::new()));
     store.register_late_pass(|| Box::new(missing_inline::MissingInline));
     store.register_late_pass(move || Box::new(exhaustive_items::ExhaustiveItems));
diff --git a/clippy_lints/src/mixed_read_write_in_expression.rs b/clippy_lints/src/mixed_read_write_in_expression.rs
@@ -40,8 +40,8 @@ declare_clippy_lint! {
     /// let a = tmp + x;
     /// ```
     #[clippy::version = "pre 1.29.0"]
-    pub EVAL_ORDER_DEPENDENCE,
-    suspicious,
+    pub MIXED_READ_WRITE_IN_EXPRESSION,
+    restriction,
     "whether a variable read occurs before a write depends on sub-expression evaluation order"
 }
 
@@ -73,7 +73,7 @@ declare_clippy_lint! {
     "whether an expression contains a diverging sub expression"
 }
 
-declare_lint_pass!(EvalOrderDependence => [EVAL_ORDER_DEPENDENCE, DIVERGING_SUB_EXPRESSION]);
+declare_lint_pass!(EvalOrderDependence => [MIXED_READ_WRITE_IN_EXPRESSION, DIVERGING_SUB_EXPRESSION]);
 
 impl<'tcx> LateLintPass<'tcx> for EvalOrderDependence {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
@@ -303,7 +303,7 @@ impl<'a, 'tcx> Visitor<'tcx> for ReadVisitor<'a, 'tcx> {
             if !is_in_assignment_position(self.cx, expr) {
                 span_lint_and_note(
                     self.cx,
-                    EVAL_ORDER_DEPENDENCE,
+                    MIXED_READ_WRITE_IN_EXPRESSION,
                     expr.span,
                     &format!("unsequenced read of `{}`", self.cx.tcx.hir().name(self.var)),
                     Some(self.write_expr.span),
diff --git a/clippy_lints/src/renamed_lints.rs b/clippy_lints/src/renamed_lints.rs
@@ -9,6 +9,7 @@ pub static RENAMED_LINTS: &[(&str, &str)] = &[
     ("clippy::cyclomatic_complexity", "clippy::cognitive_complexity"),
     ("clippy::disallowed_method", "clippy::disallowed_methods"),
     ("clippy::disallowed_type", "clippy::disallowed_types"),
+    ("clippy::eval_order_dependence", "clippy::mixed_read_write_in_expression"),
     ("clippy::for_loop_over_option", "clippy::for_loops_over_fallibles"),
     ("clippy::for_loop_over_result", "clippy::for_loops_over_fallibles"),
     ("clippy::identity_conversion", "clippy::useless_conversion"),
diff --git a/tests/ui/branches_sharing_code/shared_at_top.rs b/tests/ui/branches_sharing_code/shared_at_top.rs
@@ -1,4 +1,4 @@
-#![allow(dead_code, clippy::eval_order_dependence)]
+#![allow(dead_code, clippy::mixed_read_write_in_expression)]
 #![deny(clippy::if_same_then_else, clippy::branches_sharing_code)]
 
 // This tests the branches_sharing_code lint at the start of blocks
diff --git a/tests/ui/branches_sharing_code/valid_if_blocks.rs b/tests/ui/branches_sharing_code/valid_if_blocks.rs
@@ -1,4 +1,4 @@
-#![allow(dead_code, clippy::eval_order_dependence)]
+#![allow(dead_code, clippy::mixed_read_write_in_expression)]
 #![deny(clippy::if_same_then_else, clippy::branches_sharing_code)]
 
 // This tests valid if blocks that shouldn't trigger the lint
diff --git a/tests/ui/mixed_read_write_in_expression.rs b/tests/ui/mixed_read_write_in_expression.rs
@@ -1,4 +1,4 @@
-#[warn(clippy::eval_order_dependence)]
+#[warn(clippy::mixed_read_write_in_expression)]
 #[allow(
     unused_assignments,
     unused_variables,
diff --git a/tests/ui/mixed_read_write_in_expression.stderr b/tests/ui/mixed_read_write_in_expression.stderr
@@ -1,48 +1,48 @@
 error: unsequenced read of `x`
-  --> $DIR/eval_order_dependence.rs:14:9
+  --> $DIR/mixed_read_write_in_expression.rs:14:9
    |
 LL |     } + x;
    |         ^
    |
-   = note: `-D clippy::eval-order-dependence` implied by `-D warnings`
+   = note: `-D clippy::mixed-read-write-in-expression` implied by `-D warnings`
 note: whether read occurs before this write depends on evaluation order
-  --> $DIR/eval_order_dependence.rs:12:9
+  --> $DIR/mixed_read_write_in_expression.rs:12:9
    |
 LL |         x = 1;
    |         ^^^^^
 
 error: unsequenced read of `x`
-  --> $DIR/eval_order_dependence.rs:17:5
+  --> $DIR/mixed_read_write_in_expression.rs:17:5
    |
 LL |     x += {
    |     ^
    |
 note: whether read occurs before this write depends on evaluation order
-  --> $DIR/eval_order_dependence.rs:18:9
+  --> $DIR/mixed_read_write_in_expression.rs:18:9
    |
 LL |         x = 20;
    |         ^^^^^^
 
 error: unsequenced read of `x`
-  --> $DIR/eval_order_dependence.rs:30:12
+  --> $DIR/mixed_read_write_in_expression.rs:30:12
    |
 LL |         a: x,
    |            ^
    |
 note: whether read occurs before this write depends on evaluation order
-  --> $DIR/eval_order_dependence.rs:32:13
+  --> $DIR/mixed_read_write_in_expression.rs:32:13
    |
 LL |             x = 6;
    |             ^^^^^
 
 error: unsequenced read of `x`
-  --> $DIR/eval_order_dependence.rs:39:9
+  --> $DIR/mixed_read_write_in_expression.rs:39:9
    |
 LL |         x += {
    |         ^
    |
 note: whether read occurs before this write depends on evaluation order
-  --> $DIR/eval_order_dependence.rs:40:13
+  --> $DIR/mixed_read_write_in_expression.rs:40:13
    |
 LL |             x = 20;
    |             ^^^^^^
diff --git a/tests/ui/rename.fixed b/tests/ui/rename.fixed
@@ -10,6 +10,7 @@
 #![allow(clippy::cognitive_complexity)]
 #![allow(clippy::disallowed_methods)]
 #![allow(clippy::disallowed_types)]
+#![allow(clippy::mixed_read_write_in_expression)]
 #![allow(clippy::for_loops_over_fallibles)]
 #![allow(clippy::useless_conversion)]
 #![allow(clippy::match_result_ok)]
@@ -39,6 +40,7 @@
 #![warn(clippy::cognitive_complexity)]
 #![warn(clippy::disallowed_methods)]
 #![warn(clippy::disallowed_types)]
+#![warn(clippy::mixed_read_write_in_expression)]
 #![warn(clippy::for_loops_over_fallibles)]
 #![warn(clippy::for_loops_over_fallibles)]
 #![warn(clippy::useless_conversion)]
diff --git a/tests/ui/rename.rs b/tests/ui/rename.rs
@@ -10,6 +10,7 @@
 #![allow(clippy::cognitive_complexity)]
 #![allow(clippy::disallowed_methods)]
 #![allow(clippy::disallowed_types)]
+#![allow(clippy::mixed_read_write_in_expression)]
 #![allow(clippy::for_loops_over_fallibles)]
 #![allow(clippy::useless_conversion)]
 #![allow(clippy::match_result_ok)]
@@ -39,6 +40,7 @@
 #![warn(clippy::cyclomatic_complexity)]
 #![warn(clippy::disallowed_method)]
 #![warn(clippy::disallowed_type)]
+#![warn(clippy::eval_order_dependence)]
 #![warn(clippy::for_loop_over_option)]
 #![warn(clippy::for_loop_over_result)]
 #![warn(clippy::identity_conversion)]
diff --git a/tests/ui/rename.stderr b/tests/ui/rename.stderr
diff --git a/tests/ui/self_assignment.rs b/tests/ui/self_assignment.rs
