document Rust 1.89

src/attributes.rst

@@ -483,22 +483,49 @@ Attribute ``target_feature``
      | $$aes$$
      | $$avx$$
      | $$avx2$$
+     | $$avx512bf16$$
+     | $$avx512bitalg$$
+     | $$avx512bw$$
+     | $$avx512cd$$
+     | $$avx512dq$$
+     | $$avx512f$$
+     | $$avx512fp16$$
+     | $$avx512ifma$$
+     | $$avx512vbmi$$
+     | $$avx512vbmi2$$
+     | $$avx512vl$$
+     | $$avx512vnni$$
+     | $$avx512vp2intersect$$
+     | $$avx512vpopcntdq$$
+     | $$avxifma$$
+     | $$avxneconvert$$
+     | $$avxvnni$$
+     | $$avxvnniint16$$
+     | $$avxvnniint8$$
      | $$bmi1$$
      | $$bmi2$$
      | $$fma$$
      | $$fxsr$$
+     | $$gfni$$
+     | $$kl$$
      | $$lzcnt$$
      | $$pclmulqdq$$
      | $$popcnt$$
      | $$rdrand$$
      | $$rdseed$$
      | $$sha$$
+     | $$sha512$$
+     | $$sm3$$
+     | $$sm4$$
      | $$sse$$
      | $$sse2$$
      | $$sse3$$
      | $$sse4.1$$
      | $$sse4.2$$
      | $$ssse3$$
+     | $$vaes$$
+     | $$vpclmulqdq$$
+     | $$widekl$$
      | $$xsave$$
      | $$xsavec$$
      | $$xsaveopt$$
@@ -540,6 +567,82 @@ The target architecture features are as follows:
      - avx2
      - avx
      - Advanced Vector Extensions 2
+   * - :dp:`fls_8HPcvIaahaB9`
+     - avx512bf16
+     - avx512bw
+     - Advanced Vector Extensions 512-bit - Bfloat16 Extensions
+   * - :dp:`fls_lxcfj6XCKyMh`
+     - vx512bitalg
+     - avx512bw
+     - Advanced Vector Extensions 512-bit - Bit Algorithms
+   * - :dp:`fls_fh7i1Pcmqjdm`
+     - avx512bw
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Byte and Word Instructions
+   * - :dp:`fls_M9ne2sqhRB5L`
+     - avx512cd
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Conflict Detection Instructions
+   * - :dp:`fls_xWcGvl83bVWC`
+     - avx512dq
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Doubleword and Quadword Instructions
+   * - :dp:`fls_5CVTkOoLHAvW`
+     - avx512f
+     - avx2, fma, f16c
+     - Advanced Vector Extensions 512-bit - Foundation
+   * - :dp:`fls_hThb8qn820wJ`
+     - avx512fp16
+     - avx512bw
+     - Advanced Vector Extensions 512-bit - Float16 Extensions
+   * - :dp:`fls_1T0VYMtG3loD`
+     - avx512ifma
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Integer Fused Multiply Add
+   * - :dp:`fls_AlBD9ckWKecQ`
+     - avx512vbmi
+     - avx512bw
+     - Advanced Vector Extensions 512-bit - Vector Byte Manipulation Instructions
+   * - :dp:`fls_72cwAExPDMQ8`
+     - avx512vbmi2
+     - avx512bw
+     - Advanced Vector Extensions 512-bit - Vector Byte Manipulation Instructions 2
+   * - :dp:`fls_pSSIwmUAnUly`
+     - avx512vl
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Vector Length Extensions
+   * - :dp:`fls_YOW8lcBQ5lNI`
+     - avx512vnni
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Vector Neural Network Instructions
+   * - :dp:`fls_8PrvVL6dkr31`
+     - avx512vp2intersect
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Vector Pair Intersection to a Pair of Mask Registers
+   * - :dp:`fls_hKvaSExdlKgd`
+     - avx512vpopcntdq
+     - avx512f
+     - Advanced Vector Extensions 512-bit - Vector Population Count Instruction
+   * - :dp:`fls_r5KEicrmEGJt`
+     - avxifma
+     - avx2
+     - Advanced Vector Extensions - Integer Fused Multiply Add
+   * - :dp:`fls_Qnx9nNiJeIAX`
+     - avxneconvert
+     - avx2
+     - Advanced Vector Extensions - No-Exception Floating-Point conversion Instructions
+   * - :dp:`fls_ZrcPWy4pxlTX`
+     - avxvnni
+     - avx2
+     - Advanced Vector Extensions - Vector Neural Network Instructions
+   * - :dp:`fls_YW7otDxAliSj`
+     - avxvnniint16
+     - avx2
+     - Advanced Vector Extensions - Vector Neural Network Instructions with 16-bit Integers
+   * - :dp:`fls_G4aOoX8a7i7r`
+     - avxvnniint8
+     - avx2
+     - Advanced Vector Extensions - Vector Neural Network Instructions with 8-bit Integers
    * - :dp:`fls_eglaup5zyfsk`
      - bmi1
      -
@@ -556,6 +659,14 @@ The target architecture features are as follows:
      - fxsr
      -
      - Save and restore x87 FPU, MMX technology, and SSE state
+   * - :dp:`fls_HGKiXfM5fGVo`
+     - gfni
+     - sse2
+     - Galois Field New Instructions
+   * - :dp:`fls_gtoLNHFmmBzd`
+     - kl
+     - sse2
+     - Intel Key Locker Instructions
    * - :dp:`fls_406ltkru11tk`
      - lzcnt
      -
@@ -580,6 +691,18 @@ The target architecture features are as follows:
      - sha
      - sse2
      - Secure Hash Algorithm
+   * - :dp:`fls_UPhNSZS89sYr`
+     - sha512
+     - avx2
+     - Secure Hash Algorithm with 512-bit digest
+   * - :dp:`fls_HoNwaLtDzwZi`
+     - sm3
+     - avx
+     - ShangMi 3 Hash Algorithm
+   * - :dp:`fls_VqjfIihpRe9m`
+     - sm4
+     - avx2
+     - ShangMi 4 Hash Algorithm
    * - :dp:`fls_7c31e21g6bdj`
      - sse
      -
@@ -604,6 +727,18 @@ The target architecture features are as follows:
      - ssse3
      - sse3
      - Supplemental Streaming SIMD Extensions 3
+   * - :dp:`fls_gRf8F9PIGySt`
+     - vaes
+     - avx2, aes
+     - Vector AES Instructions
+   * - :dp:`fls_NNj4H6A9VTR8`
+     - vpclmulqdq
+     - avx, pclmulqdq
+     - Vector Carry-less multiplication of Quadwords
+   * - :dp:`fls_qZO82VdU5Iz9`
+     - widekl
+     - kl
+     - Intel Wide Keylocker Instructions
    * - :dp:`fls_rilqwazchfpp`
      - xsave
      -

src/changelog.rst

@@ -18,6 +18,111 @@ with the change that has been applied due to it.
    just the language changes that had an impact to the FLS. See the `release
    notes`_ for a full list of changes.
 
+Language changes in Rust 1.89.0
+-------------------------------
+
+- `Stabilize explicitly inferred const arguments (feature(generic_arg_infer)) <https://github.com/rust-lang/rust/pull/141610>`_
+
+  - New paragraphs:
+
+    - :p:`fls_reASCId0i117`
+    - :p:`fls_Ft5rGeL7QwJM`
+    - :p:`fls_7epZNsTYNmgE`
+    - :p:`fls_TvuMMQnR0drL`
+
+  - Changed paragraph: :p:`fls_imr2jx6cbuzq`
+
+- `Add a warn-by-default mismatched_lifetime_syntaxes lint <https://github.com/rust-lang/rust/pull/138677>`_.
+  This lint detects when the same lifetime is referred to by different syntax categories between function arguments and return values, which can be confusing to read, especially in unsafe code.
+  This lint supersedes the warn-by-default ``elided_named_lifetimes`` lint.
+
+  - No change: lints are not part of the FLS
+
+- `Expand unpredictable_function_pointer_comparisons to also lint on function pointer comparisons in external macros <https://github.com/rust-lang/rust/pull/134536>`_
+
+  - No change: lints are not part of the FLS
+
+- `Make the dangerous_implicit_autorefs lint deny-by-default <https://github.com/rust-lang/rust/pull/141661>`_
+
+  - No change: lints are not part of the FLS
+
+- `Stabilize the avx512 target features <https://github.com/rust-lang/rust/pull/138940>`_
+
+  - Changed syntax: :s:`Feature`
+
+  - New paragraphs:
+
+    - :p:`fls_8HPcvIaahaB9`
+    - :p:`fls_lxcfj6XCKyMh`
+    - :p:`fls_fh7i1Pcmqjdm`
+    - :p:`fls_M9ne2sqhRB5L`
+    - :p:`fls_xWcGvl83bVWC`
+    - :p:`fls_5CVTkOoLHAvW`
+    - :p:`fls_hThb8qn820wJ`
+    - :p:`fls_1T0VYMtG3loD`
+    - :p:`fls_AlBD9ckWKecQ`
+    - :p:`fls_72cwAExPDMQ8`
+    - :p:`fls_pSSIwmUAnUly`
+    - :p:`fls_YOW8lcBQ5lNI`
+    - :p:`fls_8PrvVL6dkr31`
+    - :p:`fls_hKvaSExdlKgd`
+    - :p:`fls_r5KEicrmEGJt`
+    - :p:`fls_Qnx9nNiJeIAX`
+    - :p:`fls_ZrcPWy4pxlTX`
+    - :p:`fls_YW7otDxAliSj`
+    - :p:`fls_G4aOoX8a7i7r`
+    - :p:`fls_HGKiXfM5fGVo`
+    - :p:`fls_gRf8F9PIGySt`
+    - :p:`fls_NNj4H6A9VTR8`
+
+- `Stabilize these target featires for x86: kl, widekl <https://github.com/rust-lang/rust/pull/140766>`_
+
+  - Changed syntax: :s:`Feature`
+
+  - New paragraphs:
+
+    - :p:`fls_gtoLNHFmmBzd`
+    - :p:`fls_qZO82VdU5Iz9`
+
+- `Stabilize these target features for x86: sha512, sm3, sm4 <https://github.com/rust-lang/rust/pull/140767>`_
+
+  - Changed syntax: :s:`Feature`
+
+  - New paragraphs:
+
+    - :p:`fls_UPhNSZS89sYr`
+    - :p:`fls_HoNwaLtDzwZi`
+    - :p:`fls_VqjfIihpRe9m`
+
+- `Stabilize these LoongArch target features: f, d, frecipe, lasx, lbt, lsx, lvz <https://github.com/rust-lang/rust/pull/135015>`_
+
+  - No change: the target is outside the scope of the FLS
+
+- `Remove i128 and u128 from improper_ctypes_definitions lint <https://github.com/rust-lang/rust/pull/137306>`_
+
+  - No change: lints are not part of the FLS
+
+- `Stabilize repr128 (#[repr(u128), #repr(i128)]) <https://github.com/rust-lang/rust/pull/138285>`_
+
+  - No change: this was erroneously documented as if it were already true
+
+- `Allow #![doc(test(attr(..))) everywhere <https://github.com/rust-lang/rust/pull/140560>`_
+
+  - No change: documentation tests are outside the scope of the FLS
+
+- `Extend temporary lifetime extension to also go through tuple struct and tuple variant constructors <https://github.com/rust-lang/rust/pull/140593>`_
+
+  - Changed paragraph: :p:`fls_DQaCUkskfXzk`
+  - New paragraphs:
+
+    - :p:`fls_YeeZWqTdMivX`
+    - :p:`fls_wyzau8hhq74d`
+    - :p:`fls_eeaJtK4w5gVK`
+
+- `extern "C" functions on the wasm32-unknown-unknown target now have a standards compliant ABI <https://blog.rust-lang.org/2025/04/04/c-abi-changes-for-wasm32-unknown-unknown/>`_
+
+  - No change: the target is outside the scope of the FLS
+
 Language changes in Rust 1.88.0
 -------------------------------
 

src/generics.rst

@@ -169,6 +169,20 @@ A :t:`constant parameter` shall be used in the following contexts:
 * :dp:`fls_byqjs5fvy2bj`
   As a :t:`value` of any :t:`expression` within a :t:`function body`.
 
+:dp:`fls_reASCId0i117`
+An :dt:`inferred constant` is a :t:`constant argument` whose :t:`value` is
+inferred from the surrounding context by using ``_`` (underscore) in its place.
+
+:dp:`fls_Ft5rGeL7QwJM`
+An :t:`inferred constant` cannot be used in :t:`item` signatures.
+
+:dp:`fls_7epZNsTYNmgE`
+An :t:`inferred constant` cannot be surrounded by ``{}`` (curly braces).
+
+:dp:`fls_TvuMMQnR0drL`
+An :t:`inferred constant` can be surrounded by an arbitrary number of ``()``
+(parentheses).
+
 :dp:`fls_hidfwkwr2r73`
 A :t:`type parameter` has an implicit :std:`core::marker::Sized` :t:`bound`,
 unless an :t:`opt-out trait bound` for the :std:`core::marker::Sized` :t:`trait`

src/glossary.rst

@@ -6912,7 +6912,7 @@ tuple struct call expression
 
 :dp:`fls_DQaCUkskfXzk`
 A :dt:`tuple struct call expression` is a :t:`call expression` where the
-:t:`call operand` resolves to a :t:`tuple struct`.
+:t:`call operand` resolves to a :t:`tuple struct` or a :t:`tuple enum variant`.
 
 .. _fls_xx4slbg8s63e:
 

src/ownership-and-deconstruction.rst

@@ -610,16 +610,20 @@ If the :t:`pattern-without-alternation` of a :t:`let statement` is an
 the :t:`let statement` is extended to the :t:`drop scope` of the
 :t:`block expression` that contains the :t:`let statement`.
 
+:dp:`fls_YeeZWqTdMivX`
+An :dt:`extending expression` is an :t:`expression` with an
+:t:`extended drop scope <drop scope extension>`.
+
 :dp:`fls_wyzau8hhq74d`
-An :dt:`extending expression` is either
+An :t:`extending expression` is any of the following:
 
 * :dp:`fls_ju7cpftd8r2g`
-  The :t:`expression` of a :t:`let statement`, or
+  The :t:`expression` of a :t:`let statement`.
 
 * :dp:`fls_gjd1ow3l7swe`
   The :t:`operand` of an :t:`extending expression` that is an
   :t:`array expression`, a :t:`borrow expression`, a :t:`struct expression`, a
-  :t:`tuple expression`, or a :t:`type cast expression`, or
+  :t:`tuple expression`, or a :t:`type cast expression`.
 
 * :dp:`fls_Rj9zhVutfQod`
   The :t:`block expression` and :t:`else expression` of an :t:`if expression`
@@ -637,6 +641,10 @@ An :dt:`extending expression` is either
   The :t:`tail expression` of a :t:`block expression` that is an
   :t:`extending expression`.
 
+* :dp:`fls_eeaJtK4w5gVK`
+  The :t:`[argument operand]s` of a :t:`tuple struct call expression`
+  that is an :t:`extending expression`.
+
 :dp:`fls_aq01wjpkxhq9`
 The :t:`drop scope` of the :t:`operand` of a :t:`borrow expression` that is an
 :t:`extending expression` is extended to the :t:`drop scope` of the

src/types-and-traits.rst

@@ -491,7 +491,8 @@ of elements.
 The :t:`element type` shall be a :t:`fixed sized type`.
 
 :dp:`fls_imr2jx6cbuzq`
-The :t:`size operand` shall be a :t:`constant expression`.
+The :t:`size operand` shall be a :t:`constant expression`
+or an :t:`inferred constant`.
 
 :dp:`fls_r8nqxry2dlww`
 The :t:`type` of the :t:`size operand` is :t:`type` :c:`usize`.