macro_rules! declare_deprecated_lint { (pub $name: ident, $_reason: expr) => { declare_lint!(pub $name, Allow, "deprecated lint") } } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This used to check for `assert!(a == b)` and recommend /// replacement with `assert_eq!(a, b)`, but this is no longer needed after RFC 2011. pub SHOULD_ASSERT_EQ, "`assert!()` will be more flexible with RFC 2011" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This used to check for `Vec::extend`, which was slower than /// `Vec::extend_from_slice`. Thanks to specialization, this is no longer true. pub EXTEND_FROM_SLICE, "`.extend_from_slice(_)` is a faster way to extend a Vec by a slice" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** `Range::step_by(0)` used to be linted since it's /// an infinite iterator, which is better expressed by `iter::repeat`, /// but the method has been removed for `Iterator::step_by` which panics /// if given a zero pub RANGE_STEP_BY_ZERO, "`iterator.step_by(0)` panics nowadays" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This used to check for `Vec::as_slice`, which was unstable with good /// stable alternatives. `Vec::as_slice` has now been stabilized. pub UNSTABLE_AS_SLICE, "`Vec::as_slice` has been stabilized in 1.7" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This used to check for `Vec::as_mut_slice`, which was unstable with good /// stable alternatives. `Vec::as_mut_slice` has now been stabilized. pub UNSTABLE_AS_MUT_SLICE, "`Vec::as_mut_slice` has been stabilized in 1.7" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This used to check for `.to_string()` method calls on values /// of type `&str`. This is not unidiomatic and with specialization coming, `to_string` could be /// specialized to be as efficient as `to_owned`. pub STR_TO_STRING, "using `str::to_string` is common even today and specialization will likely happen soon" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This used to check for `.to_string()` method calls on values /// of type `String`. This is not unidiomatic and with specialization coming, `to_string` could be /// specialized to be as efficient as `clone`. pub STRING_TO_STRING, "using `string::to_string` is common even today and specialization will likely happen soon" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This lint should never have applied to non-pointer types, as transmuting /// between non-pointer types of differing alignment is well-defined behavior (it's semantically /// equivalent to a memcpy). This lint has thus been refactored into two separate lints: /// cast_ptr_alignment and transmute_ptr_to_ptr. pub MISALIGNED_TRANSMUTE, "this lint has been split into cast_ptr_alignment and transmute_ptr_to_ptr" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This lint is too subjective, not having a good reason for being in clippy. /// Additionally, compound assignment operators may be overloaded separately from their non-assigning /// counterparts, so this lint may suggest a change in behavior or the code may not compile. pub ASSIGN_OPS, "using compound assignment operators (e.g., `+=`) is harmless" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** The original rule will only lint for `if let`. After /// making it support to lint `match`, naming as `if let` is not suitable for it. /// So, this lint is deprecated. pub IF_LET_REDUNDANT_PATTERN_MATCHING, "this lint has been changed to redundant_pattern_matching" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This lint used to suggest replacing `let mut vec = /// Vec::with_capacity(n); vec.set_len(n);` with `let vec = vec![0; n];`. The /// replacement has very different performance characteristics so the lint is /// deprecated. pub UNSAFE_VECTOR_INITIALIZATION, "the replacement suggested by this lint had substantially different behavior" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This lint has been superseded by the warn-by-default /// `invalid_value` rustc lint. pub INVALID_REF, "superseded by rustc lint `invalid_value`" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This lint has been superseded by #[must_use] in rustc. pub UNUSED_COLLECT, "`collect` has been marked as #[must_use] in rustc and that covers all cases of this lint" } declare_deprecated_lint! { /// **What it does:** Nothing. This lint has been deprecated. /// /// **Deprecation reason:** This lint has been uplifted to rustc and is now called /// `array_into_iter`. pub INTO_ITER_ON_ARRAY, "this lint has been uplifted to rustc and is now called `array_into_iter`" }