diff options
22 files changed, 292 insertions, 315 deletions
diff --git a/compiler/rustc_lint/src/enum_intrinsics_non_enums.rs b/compiler/rustc_lint/src/enum_intrinsics_non_enums.rs new file mode 100644 index 00000000000..876245747f6 --- /dev/null +++ b/compiler/rustc_lint/src/enum_intrinsics_non_enums.rs @@ -0,0 +1,106 @@ +use crate::{context::LintContext, LateContext, LateLintPass}; +use rustc_hir as hir; +use rustc_middle::ty::{fold::TypeFoldable, Ty}; +use rustc_span::{symbol::sym, Span}; + +declare_lint! { + /// The `enum_intrinsics_non_enums` lint detects calls to + /// intrinsic functions that require an enum ([`core::mem::discriminant`], + /// [`core::mem::variant_count`]), but are called with a non-enum type. + /// + /// [`core::mem::discriminant`]: https://doc.rust-lang.org/core/mem/fn.discriminant.html + /// [`core::mem::variant_count`]: https://doc.rust-lang.org/core/mem/fn.variant_count.html + /// + /// ### Example + /// + /// ```rust,compile_fail + /// #![deny(enum_intrinsics_non_enums)] + /// core::mem::discriminant::<i32>(&123); + /// ``` + /// + /// {{produces}} + /// + /// ### Explanation + /// + /// In order to accept any enum, the `mem::discriminant` and + /// `mem::variant_count` functions are generic over a type `T`. + /// This makes it technically possible for `T` to be a non-enum, + /// in which case the return value is unspecified. + /// + /// This lint prevents such incorrect usage of these functions. + ENUM_INTRINSICS_NON_ENUMS, + Deny, + "detects calls to `core::mem::discriminant` and `core::mem::variant_count` with non-enum types" +} + +declare_lint_pass!(EnumIntrinsicsNonEnums => [ENUM_INTRINSICS_NON_ENUMS]); + +/// Returns `true` if we know for sure that the given type is not an enum. Note that for cases where +/// the type is generic, we can't be certain if it will be an enum so we have to assume that it is. +fn is_non_enum(t: Ty<'_>) -> bool { + !t.is_enum() && !t.potentially_needs_subst() +} + +fn enforce_mem_discriminant( + cx: &LateContext<'_>, + func_expr: &hir::Expr<'_>, + expr_span: Span, + args_span: Span, +) { + let ty_param = cx.typeck_results().node_substs(func_expr.hir_id).type_at(0); + if is_non_enum(ty_param) { + cx.struct_span_lint(ENUM_INTRINSICS_NON_ENUMS, expr_span, |builder| { + builder + .build( + "the return value of `mem::discriminant` is \ + unspecified when called with a non-enum type", + ) + .span_note( + args_span, + &format!( + "the argument to `discriminant` should be a \ + reference to an enum, but it was passed \ + a reference to a `{}`, which is not an enum.", + ty_param, + ), + ) + .emit(); + }); + } +} + +fn enforce_mem_variant_count(cx: &LateContext<'_>, func_expr: &hir::Expr<'_>, span: Span) { + let ty_param = cx.typeck_results().node_substs(func_expr.hir_id).type_at(0); + if is_non_enum(ty_param) { + cx.struct_span_lint(ENUM_INTRINSICS_NON_ENUMS, span, |builder| { + builder + .build( + "the return value of `mem::variant_count` is \ + unspecified when called with a non-enum type", + ) + .note(&format!( + "the type parameter of `variant_count` should \ + be an enum, but it was instantiated with \ + the type `{}`, which is not an enum.", + ty_param, + )) + .emit(); + }); + } +} + +impl<'tcx> LateLintPass<'tcx> for EnumIntrinsicsNonEnums { + fn check_expr(&mut self, cx: &LateContext<'_>, expr: &hir::Expr<'_>) { + if let hir::ExprKind::Call(ref func, ref args) = expr.kind { + if let hir::ExprKind::Path(ref qpath) = func.kind { + if let Some(def_id) = cx.qpath_res(qpath, func.hir_id).opt_def_id() { + if cx.tcx.is_diagnostic_item(sym::mem_discriminant, def_id) { + enforce_mem_discriminant(cx, func, expr.span, args[0].span); + } else if cx.tcx.is_diagnostic_item(sym::mem_variant_count, def_id) { + enforce_mem_variant_count(cx, func, expr.span); + } + } + } + } + } +} diff --git a/compiler/rustc_lint/src/lib.rs b/compiler/rustc_lint/src/lib.rs index 17eb0054584..6f684a0fe51 100644 --- a/compiler/rustc_lint/src/lib.rs +++ b/compiler/rustc_lint/src/lib.rs @@ -47,6 +47,7 @@ mod array_into_iter; pub mod builtin; mod context; mod early; +mod enum_intrinsics_non_enums; mod internal; mod late; mod levels; @@ -76,6 +77,7 @@ use rustc_span::Span; use array_into_iter::ArrayIntoIter; use builtin::*; +use enum_intrinsics_non_enums::EnumIntrinsicsNonEnums; use internal::*; use methods::*; use non_ascii_idents::*; @@ -168,6 +170,7 @@ macro_rules! late_lint_passes { TemporaryCStringAsPtr: TemporaryCStringAsPtr, NonPanicFmt: NonPanicFmt, NoopMethodCall: NoopMethodCall, + EnumIntrinsicsNonEnums: EnumIntrinsicsNonEnums, InvalidAtomicOrdering: InvalidAtomicOrdering, NamedAsmLabels: NamedAsmLabels, ] diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs index 9551120ca55..6c889e88a59 100644 --- a/compiler/rustc_span/src/symbol.rs +++ b/compiler/rustc_span/src/symbol.rs @@ -816,6 +816,7 @@ symbols! { mem_size_of, mem_size_of_val, mem_uninitialized, + mem_variant_count, mem_zeroed, member_constraints, memory, diff --git a/library/core/src/mem/mod.rs b/library/core/src/mem/mod.rs index 84fd1a532c1..894ae10e1b4 100644 --- a/library/core/src/mem/mod.rs +++ b/library/core/src/mem/mod.rs @@ -1053,6 +1053,7 @@ pub const fn discriminant<T>(v: &T) -> Discriminant<T> { #[inline(always)] #[unstable(feature = "variant_count", issue = "73662")] #[rustc_const_unstable(feature = "variant_count", issue = "73662")] +#[rustc_diagnostic_item = "mem_variant_count"] pub const fn variant_count<T>() -> usize { intrinsics::variant_count::<T>() } diff --git a/src/test/ui/consts/const-variant-count.rs b/src/test/ui/consts/const-variant-count.rs index 455419d2c7f..50eaeeb4685 100644 --- a/src/test/ui/consts/const-variant-count.rs +++ b/src/test/ui/consts/const-variant-count.rs @@ -1,5 +1,5 @@ // run-pass -#![allow(dead_code)] +#![allow(dead_code, enum_intrinsics_non_enums)] #![feature(variant_count)] #![feature(never_type)] diff --git a/src/test/ui/enum-discriminant/discriminant_value-wrapper.rs b/src/test/ui/enum-discriminant/discriminant_value-wrapper.rs index daef2de87a9..65dc9166330 100644 --- a/src/test/ui/enum-discriminant/discriminant_value-wrapper.rs +++ b/src/test/ui/enum-discriminant/discriminant_value-wrapper.rs @@ -1,4 +1,7 @@ // run-pass + +#![allow(enum_intrinsics_non_enums)] + use std::mem; enum ADT { diff --git a/src/test/ui/lint/lint-enum-intrinsics-non-enums.rs b/src/test/ui/lint/lint-enum-intrinsics-non-enums.rs new file mode 100644 index 00000000000..8ad337064e5 --- /dev/null +++ b/src/test/ui/lint/lint-enum-intrinsics-non-enums.rs @@ -0,0 +1,67 @@ +// Test the enum_intrinsics_non_enums lint. + +#![feature(variant_count)] + +use std::mem::{discriminant, variant_count}; + +enum SomeEnum { + A, + B, +} + +struct SomeStruct; + +fn generic_discriminant<T>(v: &T) { + discriminant::<T>(v); +} + +fn generic_variant_count<T>() -> usize { + variant_count::<T>() +} + +fn test_discriminant() { + discriminant(&SomeEnum::A); + generic_discriminant(&SomeEnum::B); + + discriminant(&()); + //~^ error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + + discriminant(&&SomeEnum::B); + //~^ error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + + discriminant(&SomeStruct); + //~^ error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + + discriminant(&123u32); + //~^ error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + + discriminant(&&123i8); + //~^ error: the return value of `mem::discriminant` is unspecified when called with a non-enum type +} + +fn test_variant_count() { + variant_count::<SomeEnum>(); + generic_variant_count::<SomeEnum>(); + + variant_count::<&str>(); + //~^ error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + + variant_count::<*const u8>(); + //~^ error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + + variant_count::<()>(); + //~^ error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + + variant_count::<&SomeEnum>(); + //~^ error: the return value of `mem::variant_count` is unspecified when called with a non-enum type +} + +fn main() { + test_discriminant(); + test_variant_count(); + + // The lint ignores cases where the type is generic, so these should be + // allowed even though their return values are unspecified + generic_variant_count::<SomeStruct>(); + generic_discriminant::<SomeStruct>(&SomeStruct); +} diff --git a/src/test/ui/lint/lint-enum-intrinsics-non-enums.stderr b/src/test/ui/lint/lint-enum-intrinsics-non-enums.stderr new file mode 100644 index 00000000000..bec9fb62efa --- /dev/null +++ b/src/test/ui/lint/lint-enum-intrinsics-non-enums.stderr @@ -0,0 +1,95 @@ +error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:26:5 + | +LL | discriminant(&()); + | ^^^^^^^^^^^^^^^^^ + | + = note: `#[deny(enum_intrinsics_non_enums)]` on by default +note: the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `()`, which is not an enum. + --> $DIR/lint-enum-intrinsics-non-enums.rs:26:18 + | +LL | discriminant(&()); + | ^^^ + +error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:29:5 + | +LL | discriminant(&&SomeEnum::B); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +note: the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `&SomeEnum`, which is not an enum. + --> $DIR/lint-enum-intrinsics-non-enums.rs:29:18 + | +LL | discriminant(&&SomeEnum::B); + | ^^^^^^^^^^^^^ + +error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:32:5 + | +LL | discriminant(&SomeStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + | +note: the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `SomeStruct`, which is not an enum. + --> $DIR/lint-enum-intrinsics-non-enums.rs:32:18 + | +LL | discriminant(&SomeStruct); + | ^^^^^^^^^^^ + +error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:35:5 + | +LL | discriminant(&123u32); + | ^^^^^^^^^^^^^^^^^^^^^ + | +note: the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `u32`, which is not an enum. + --> $DIR/lint-enum-intrinsics-non-enums.rs:35:18 + | +LL | discriminant(&123u32); + | ^^^^^^^ + +error: the return value of `mem::discriminant` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:38:5 + | +LL | discriminant(&&123i8); + | ^^^^^^^^^^^^^^^^^^^^^ + | +note: the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `&i8`, which is not an enum. + --> $DIR/lint-enum-intrinsics-non-enums.rs:38:18 + | +LL | discriminant(&&123i8); + | ^^^^^^^ + +error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:46:5 + | +LL | variant_count::<&str>(); + | ^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the type parameter of `variant_count` should be an enum, but it was instantiated with the type `&str`, which is not an enum. + +error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:49:5 + | +LL | variant_count::<*const u8>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the type parameter of `variant_count` should be an enum, but it was instantiated with the type `*const u8`, which is not an enum. + +error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:52:5 + | +LL | variant_count::<()>(); + | ^^^^^^^^^^^^^^^^^^^^^ + | + = note: the type parameter of `variant_count` should be an enum, but it was instantiated with the type `()`, which is not an enum. + +error: the return value of `mem::variant_count` is unspecified when called with a non-enum type + --> $DIR/lint-enum-intrinsics-non-enums.rs:55:5 + | +LL | variant_count::<&SomeEnum>(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: the type parameter of `variant_count` should be an enum, but it was instantiated with the type `&SomeEnum`, which is not an enum. + +error: aborting due to 9 previous errors + diff --git a/src/tools/clippy/CHANGELOG.md b/src/tools/clippy/CHANGELOG.md index 7fdb300c977..e700e5f0d73 100644 --- a/src/tools/clippy/CHANGELOG.md +++ b/src/tools/clippy/CHANGELOG.md @@ -1873,10 +1873,10 @@ Released 2019-01-17 [2e26fdc2...b2601be](https://github.com/rust-lang/rust-clippy/compare/2e26fdc2...b2601be) -* New lints: [`slow_vector_initialization`], [`mem_discriminant_non_enum`], +* New lints: [`slow_vector_initialization`], `mem_discriminant_non_enum`, [`redundant_clone`], [`wildcard_dependencies`], [`into_iter_on_ref`], `into_iter_on_array`, [`deprecated_cfg_attr`], - [`mem_discriminant_non_enum`], [`cargo_common_metadata`] + [`cargo_common_metadata`] * Add support for `u128` and `i128` to integer related lints * Add float support to `mistyped_literal_suffixes` * Fix false positives in `use_self` @@ -2839,7 +2839,6 @@ Released 2018-09-13 [`match_wild_err_arm`]: https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm [`match_wildcard_for_single_variants`]: https://rust-lang.github.io/rust-clippy/master/index.html#match_wildcard_for_single_variants [`maybe_infinite_iter`]: https://rust-lang.github.io/rust-clippy/master/index.html#maybe_infinite_iter -[`mem_discriminant_non_enum`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_discriminant_non_enum [`mem_forget`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_forget [`mem_replace_option_with_none`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_option_with_none [`mem_replace_with_default`]: https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_with_default diff --git a/src/tools/clippy/clippy_lints/src/lib.register_all.rs b/src/tools/clippy/clippy_lints/src/lib.register_all.rs index 3e6e0244754..6a3ee35b41a 100644 --- a/src/tools/clippy/clippy_lints/src/lib.register_all.rs +++ b/src/tools/clippy/clippy_lints/src/lib.register_all.rs @@ -127,7 +127,6 @@ store.register_group(true, "clippy::all", Some("clippy_all"), vec![ LintId::of(matches::REDUNDANT_PATTERN_MATCHING), LintId::of(matches::SINGLE_MATCH), LintId::of(matches::WILDCARD_IN_OR_PATTERNS), - LintId::of(mem_discriminant::MEM_DISCRIMINANT_NON_ENUM), LintId::of(mem_replace::MEM_REPLACE_OPTION_WITH_NONE), LintId::of(mem_replace::MEM_REPLACE_WITH_DEFAULT), LintId::of(mem_replace::MEM_REPLACE_WITH_UNINIT), diff --git a/src/tools/clippy/clippy_lints/src/lib.register_correctness.rs b/src/tools/clippy/clippy_lints/src/lib.register_correctness.rs index e0ef7b3b8af..bbe47a0e772 100644 --- a/src/tools/clippy/clippy_lints/src/lib.register_correctness.rs +++ b/src/tools/clippy/clippy_lints/src/lib.register_correctness.rs @@ -36,7 +36,6 @@ store.register_group(true, "clippy::correctness", Some("clippy_correctness"), ve LintId::of(loops::ITER_NEXT_LOOP), LintId::of(loops::NEVER_LOOP), LintId::of(loops::WHILE_IMMUTABLE_CONDITION), - LintId::of(mem_discriminant::MEM_DISCRIMINANT_NON_ENUM), LintId::of(mem_replace::MEM_REPLACE_WITH_UNINIT), LintId::of(methods::CLONE_DOUBLE_REF), LintId::of(methods::ITERATOR_STEP_BY_ZERO), diff --git a/src/tools/clippy/clippy_lints/src/lib.register_lints.rs b/src/tools/clippy/clippy_lints/src/lib.register_lints.rs index 2ba2b3da55c..b0be3b65366 100644 --- a/src/tools/clippy/clippy_lints/src/lib.register_lints.rs +++ b/src/tools/clippy/clippy_lints/src/lib.register_lints.rs @@ -241,7 +241,6 @@ store.register_lints(&[ matches::SINGLE_MATCH_ELSE, matches::WILDCARD_ENUM_MATCH_ARM, matches::WILDCARD_IN_OR_PATTERNS, - mem_discriminant::MEM_DISCRIMINANT_NON_ENUM, mem_forget::MEM_FORGET, mem_replace::MEM_REPLACE_OPTION_WITH_NONE, mem_replace::MEM_REPLACE_WITH_DEFAULT, diff --git a/src/tools/clippy/clippy_lints/src/lib.rs b/src/tools/clippy/clippy_lints/src/lib.rs index 9fc6a9e0ccc..5534f9c94f3 100644 --- a/src/tools/clippy/clippy_lints/src/lib.rs +++ b/src/tools/clippy/clippy_lints/src/lib.rs @@ -266,7 +266,6 @@ mod map_unit_fn; mod match_on_vec_items; mod match_result_ok; mod matches; -mod mem_discriminant; mod mem_forget; mod mem_replace; mod methods; @@ -600,7 +599,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf: let doc_valid_idents = conf.doc_valid_idents.iter().cloned().collect::<FxHashSet<_>>(); store.register_late_pass(move || Box::new(doc::DocMarkdown::new(doc_valid_idents.clone()))); store.register_late_pass(|| Box::new(neg_multiply::NegMultiply)); - store.register_late_pass(|| Box::new(mem_discriminant::MemDiscriminant)); store.register_late_pass(|| Box::new(mem_forget::MemForget)); store.register_late_pass(|| Box::new(arithmetic::Arithmetic::default())); store.register_late_pass(|| Box::new(assign_ops::AssignOps)); @@ -850,6 +848,7 @@ pub fn register_renamed(ls: &mut rustc_lint::LintStore) { ls.register_renamed("clippy::panic_params", "non_fmt_panics"); ls.register_renamed("clippy::unknown_clippy_lints", "unknown_lints"); ls.register_renamed("clippy::invalid_atomic_ordering", "invalid_atomic_ordering"); + ls.register_renamed("clippy::mem_discriminant_non_enum", "enum_intrinsics_non_enums"); } // only exists to let the dogfood integration test works. diff --git a/src/tools/clippy/clippy_lints/src/mem_discriminant.rs b/src/tools/clippy/clippy_lints/src/mem_discriminant.rs deleted file mode 100644 index 59176c4b846..00000000000 --- a/src/tools/clippy/clippy_lints/src/mem_discriminant.rs +++ /dev/null @@ -1,82 +0,0 @@ -use clippy_utils::diagnostics::span_lint_and_then; -use clippy_utils::source::snippet; -use clippy_utils::ty::walk_ptrs_ty_depth; -use clippy_utils::{match_def_path, paths}; -use if_chain::if_chain; -use rustc_errors::Applicability; -use rustc_hir::{BorrowKind, Expr, ExprKind}; -use rustc_lint::{LateContext, LateLintPass}; -use rustc_session::{declare_lint_pass, declare_tool_lint}; - -declare_clippy_lint! { - /// ### What it does - /// Checks for calls of `mem::discriminant()` on a non-enum type. - /// - /// ### Why is this bad? - /// The value of `mem::discriminant()` on non-enum types - /// is unspecified. - /// - /// ### Example - /// ```rust - /// use std::mem; - /// - /// mem::discriminant(&"hello"); - /// mem::discriminant(&&Some(2)); - /// ``` - pub MEM_DISCRIMINANT_NON_ENUM, - correctness, - "calling `mem::descriminant` on non-enum type" -} - -declare_lint_pass!(MemDiscriminant => [MEM_DISCRIMINANT_NON_ENUM]); - -impl<'tcx> LateLintPass<'tcx> for MemDiscriminant { - fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) { - if_chain! { - if let ExprKind::Call(func, func_args) = expr.kind; - // is `mem::discriminant` - if let ExprKind::Path(ref func_qpath) = func.kind; - if let Some(def_id) = cx.qpath_res(func_qpath, func.hir_id).opt_def_id(); - if match_def_path(cx, def_id, &paths::MEM_DISCRIMINANT); - // type is non-enum - let ty_param = cx.typeck_results().node_substs(func.hir_id).type_at(0); - if !ty_param.is_enum(); - - then { - span_lint_and_then( - cx, - MEM_DISCRIMINANT_NON_ENUM, - expr.span, - &format!("calling `mem::discriminant` on non-enum type `{}`", ty_param), - |diag| { - // if this is a reference to an enum, suggest dereferencing - let (base_ty, ptr_depth) = walk_ptrs_ty_depth(ty_param); - if ptr_depth >= 1 && base_ty.is_enum() { - let param = &func_args[0]; - - // cancel out '&'s first - let mut derefs_needed = ptr_depth; - let mut cur_expr = param; - while derefs_needed > 0 { - if let ExprKind::AddrOf(BorrowKind::Ref, _, inner_expr) = cur_expr.kind { - derefs_needed -= 1; - cur_expr = inner_expr; - } else { - break; - } - } - - let derefs = "*".repeat(derefs_needed); - diag.span_suggestion( - param.span, - "try dereferencing", - format!("{}{}", derefs, snippet(cx, cur_expr.span, "<param>")), - Applicability::MachineApplicable, - ); - } - }, - ) - } - } - } -} diff --git a/src/tools/clippy/tests/ui/mem_discriminant.fixed b/src/tools/clippy/tests/ui/mem_discriminant.fixed deleted file mode 100644 index 69a8f286d05..00000000000 --- a/src/tools/clippy/tests/ui/mem_discriminant.fixed +++ /dev/null @@ -1,45 +0,0 @@ -// run-rustfix - -#![deny(clippy::mem_discriminant_non_enum)] - -use std::mem; - -enum Foo { - One(usize), - Two(u8), -} - -fn main() { - // bad - mem::discriminant(&Some(2)); - mem::discriminant(&None::<u8>); - mem::discriminant(&Foo::One(5)); - mem::discriminant(&Foo::Two(5)); - - let ro = &Some(3); - let rro = &ro; - mem::discriminant(ro); - mem::discriminant(*rro); - mem::discriminant(*rro); - - macro_rules! mem_discriminant_but_in_a_macro { - ($param:expr) => { - mem::discriminant($param) - }; - } - - mem_discriminant_but_in_a_macro!(*rro); - - let rrrrro = &&&rro; - mem::discriminant(****rrrrro); - mem::discriminant(****rrrrro); - - // ok - mem::discriminant(&Some(2)); - mem::discriminant(&None::<u8>); - mem::discriminant(&Foo::One(5)); - mem::discriminant(&Foo::Two(5)); - mem::discriminant(ro); - mem::discriminant(*rro); - mem::discriminant(****rrrrro); -} diff --git a/src/tools/clippy/tests/ui/mem_discriminant.rs b/src/tools/clippy/tests/ui/mem_discriminant.rs deleted file mode 100644 index 55db50fcdc7..00000000000 --- a/src/tools/clippy/tests/ui/mem_discriminant.rs +++ /dev/null @@ -1,45 +0,0 @@ -// run-rustfix - -#![deny(clippy::mem_discriminant_non_enum)] - -use std::mem; - -enum Foo { - One(usize), - Two(u8), -} - -fn main() { - // bad - mem::discriminant(&&Some(2)); - mem::discriminant(&&None::<u8>); - mem::discriminant(&&Foo::One(5)); - mem::discriminant(&&Foo::Two(5)); - - let ro = &Some(3); - let rro = &ro; - mem::discriminant(&ro); - mem::discriminant(rro); - mem::discriminant(&rro); - - macro_rules! mem_discriminant_but_in_a_macro { - ($param:expr) => { - mem::discriminant($param) - }; - } - - mem_discriminant_but_in_a_macro!(&rro); - - let rrrrro = &&&rro; - mem::discriminant(&rrrrro); - mem::discriminant(*rrrrro); - - // ok - mem::discriminant(&Some(2)); - mem::discriminant(&None::<u8>); - mem::discriminant(&Foo::One(5)); - mem::discriminant(&Foo::Two(5)); - mem::discriminant(ro); - mem::discriminant(*rro); - mem::discriminant(****rrrrro); -} diff --git a/src/tools/clippy/tests/ui/mem_discriminant.stderr b/src/tools/clippy/tests/ui/mem_discriminant.stderr deleted file mode 100644 index 36a225b7594..00000000000 --- a/src/tools/clippy/tests/ui/mem_discriminant.stderr +++ /dev/null @@ -1,94 +0,0 @@ -error: calling `mem::discriminant` on non-enum type `&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:14:5 - | -LL | mem::discriminant(&&Some(2)); - | ^^^^^^^^^^^^^^^^^^---------^ - | | - | help: try dereferencing: `&Some(2)` - | -note: the lint level is defined here - --> $DIR/mem_discriminant.rs:3:9 - | -LL | #![deny(clippy::mem_discriminant_non_enum)] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -error: calling `mem::discriminant` on non-enum type `&std::option::Option<u8>` - --> $DIR/mem_discriminant.rs:15:5 - | -LL | mem::discriminant(&&None::<u8>); - | ^^^^^^^^^^^^^^^^^^------------^ - | | - | help: try dereferencing: `&None::<u8>` - -error: calling `mem::discriminant` on non-enum type `&Foo` - --> $DIR/mem_discriminant.rs:16:5 - | -LL | mem::discriminant(&&Foo::One(5)); - | ^^^^^^^^^^^^^^^^^^-------------^ - | | - | help: try dereferencing: `&Foo::One(5)` - -error: calling `mem::discriminant` on non-enum type `&Foo` - --> $DIR/mem_discriminant.rs:17:5 - | -LL | mem::discriminant(&&Foo::Two(5)); - | ^^^^^^^^^^^^^^^^^^-------------^ - | | - | help: try dereferencing: `&Foo::Two(5)` - -error: calling `mem::discriminant` on non-enum type `&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:21:5 - | -LL | mem::discriminant(&ro); - | ^^^^^^^^^^^^^^^^^^---^ - | | - | help: try dereferencing: `ro` - -error: calling `mem::discriminant` on non-enum type `&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:22:5 - | -LL | mem::discriminant(rro); - | ^^^^^^^^^^^^^^^^^^---^ - | | - | help: try dereferencing: `*rro` - -error: calling `mem::discriminant` on non-enum type `&&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:23:5 - | -LL | mem::discriminant(&rro); - | ^^^^^^^^^^^^^^^^^^----^ - | | - | help: try dereferencing: `*rro` - -error: calling `mem::discriminant` on non-enum type `&&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:27:13 - | -LL | mem::discriminant($param) - | ^^^^^^^^^^^^^^^^^^^^^^^^^ -... -LL | mem_discriminant_but_in_a_macro!(&rro); - | --------------------------------------- - | | | - | | help: try dereferencing: `*rro` - | in this macro invocation - | - = note: this error originates in the macro `mem_discriminant_but_in_a_macro` (in Nightly builds, run with -Z macro-backtrace for more info) - -error: calling `mem::discriminant` on non-enum type `&&&&&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:34:5 - | -LL | mem::discriminant(&rrrrro); - | ^^^^^^^^^^^^^^^^^^-------^ - | | - | help: try dereferencing: `****rrrrro` - -error: calling `mem::discriminant` on non-enum type `&&&std::option::Option<i32>` - --> $DIR/mem_discriminant.rs:35:5 - | -LL | mem::discriminant(*rrrrro); - | ^^^^^^^^^^^^^^^^^^-------^ - | | - | help: try dereferencing: `****rrrrro` - -error: aborting due to 10 previous errors - diff --git a/src/tools/clippy/tests/ui/mem_discriminant_unfixable.rs b/src/tools/clippy/tests/ui/mem_discriminant_unfixable.rs deleted file mode 100644 index e245d3257d5..00000000000 --- a/src/tools/clippy/tests/ui/mem_discriminant_unfixable.rs +++ /dev/null @@ -1,16 +0,0 @@ -#![deny(clippy::mem_discriminant_non_enum)] - -use std::mem; - -enum Foo { - One(usize), - Two(u8), -} - -struct A(Foo); - -fn main() { - // bad - mem::discriminant(&"hello"); - mem::discriminant(&A(Foo::One(0))); -} diff --git a/src/tools/clippy/tests/ui/mem_discriminant_unfixable.stderr b/src/tools/clippy/tests/ui/mem_discriminant_unfixable.stderr deleted file mode 100644 index e2de3776f2c..00000000000 --- a/src/tools/clippy/tests/ui/mem_discriminant_unfixable.stderr +++ /dev/null @@ -1,20 +0,0 @@ -error: calling `mem::discriminant` on non-enum type `&str` - --> $DIR/mem_discriminant_unfixable.rs:14:5 - | -LL | mem::discriminant(&"hello"); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ - | -note: the lint level is defined here - --> $DIR/mem_discriminant_unfixable.rs:1:9 - | -LL | #![deny(clippy::mem_discriminant_non_enum)] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -error: calling `mem::discriminant` on non-enum type `A` - --> $DIR/mem_discriminant_unfixable.rs:15:5 - | -LL | mem::discriminant(&A(Foo::One(0))); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -error: aborting due to 2 previous errors - diff --git a/src/tools/clippy/tests/ui/rename.fixed b/src/tools/clippy/tests/ui/rename.fixed index 13fbb6e2a6e..a66c2e587c8 100644 --- a/src/tools/clippy/tests/ui/rename.fixed +++ b/src/tools/clippy/tests/ui/rename.fixed @@ -8,6 +8,7 @@ #![allow(clippy::redundant_static_lifetimes)] // warn for the old lint name here, to test if the renaming worked #![warn(clippy::cognitive_complexity)] +#![warn(enum_intrinsics_non_enums)] #[warn(clippy::module_name_repetitions)] fn main() {} diff --git a/src/tools/clippy/tests/ui/rename.rs b/src/tools/clippy/tests/ui/rename.rs index cbd3b1e9166..fa81201a2da 100644 --- a/src/tools/clippy/tests/ui/rename.rs +++ b/src/tools/clippy/tests/ui/rename.rs @@ -8,6 +8,7 @@ #![allow(clippy::redundant_static_lifetimes)] // warn for the old lint name here, to test if the renaming worked #![warn(clippy::cyclomatic_complexity)] +#![warn(clippy::mem_discriminant_non_enum)] #[warn(clippy::stutter)] fn main() {} diff --git a/src/tools/clippy/tests/ui/rename.stderr b/src/tools/clippy/tests/ui/rename.stderr index c5d633ff86b..05c7854074c 100644 --- a/src/tools/clippy/tests/ui/rename.stderr +++ b/src/tools/clippy/tests/ui/rename.stderr @@ -6,23 +6,29 @@ LL | #![warn(clippy::cyclomatic_complexity)] | = note: `-D renamed-and-removed-lints` implied by `-D warnings` +error: lint `clippy::mem_discriminant_non_enum` has been renamed to `enum_intrinsics_non_enums` + --> $DIR/rename.rs:11:9 + | +LL | #![warn(clippy::mem_discriminant_non_enum)] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `enum_intrinsics_non_enums` + error: lint `clippy::stutter` has been renamed to `clippy::module_name_repetitions` - --> $DIR/rename.rs:12:8 + --> $DIR/rename.rs:13:8 | LL | #[warn(clippy::stutter)] | ^^^^^^^^^^^^^^^ help: use the new name: `clippy::module_name_repetitions` error: lint `clippy::new_without_default_derive` has been renamed to `clippy::new_without_default` - --> $DIR/rename.rs:15:8 + --> $DIR/rename.rs:16:8 | LL | #[warn(clippy::new_without_default_derive)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::new_without_default` error: lint `clippy::const_static_lifetime` has been renamed to `clippy::redundant_static_lifetimes` - --> $DIR/rename.rs:18:8 + --> $DIR/rename.rs:19:8 | LL | #[warn(clippy::const_static_lifetime)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `clippy::redundant_static_lifetimes` -error: aborting due to 4 previous errors +error: aborting due to 5 previous errors |