Rollup merge of rust-lang#57049 - cramertj:repr-packed, r=Centril

Stabilize #[repr(packed(N))]

Fixes rust-lang#33158

Author: kennytm

src/doc/unstable-book/src/language-features/repr-packed.md

@@ -397,9 +397,6 @@ declare_features! (
     // Multiple patterns with `|` in `if let` and `while let`.
     (active, if_while_or_patterns, "1.26.0", Some(48215), None),
 
-    // Allows `#[repr(packed)]` attribute on structs.
-    (active, repr_packed, "1.26.0", Some(33158), None),
-
     // Allows macro invocations in `extern {}` blocks.
     (active, macros_in_extern, "1.27.0", Some(49476), None),
 
@@ -695,6 +692,8 @@ declare_features! (
     (accepted, self_in_typedefs, "1.32.0", Some(49303), None),
     // `use path as _;` and `extern crate c as _;`
     (accepted, underscore_imports, "1.33.0", Some(48216), None),
+    // Allows `#[repr(packed(N))]` attribute on structs.
+    (accepted, repr_packed, "1.33.0", Some(33158), None),
 );
 
 // If you change this, please modify `src/doc/unstable-book` as well. You must
@@ -1588,13 +1587,6 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                             gate_feature_post!(&self, repr_simd, attr.span,
                                                "SIMD types are experimental and possibly buggy");
                         }
-                        if let Some((name, _)) = item.name_value_literal() {
-                            if name == "packed" {
-                                gate_feature_post!(&self, repr_packed, attr.span,
-                                                   "the `#[repr(packed(n))]` attribute \
-                                                    is experimental");
-                            }
-                        }
                     }
                 }
             }

src/libsyntax/feature_gate.rs

@@ -13,7 +13,6 @@
 // min-llvm-version 7.0
 
 #![crate_type = "lib"]
-#![feature(repr_packed)]
 
 #[repr(packed)]
 pub struct Packed1 {

src/test/codegen/packed.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 // run-pass
-#![feature(repr_packed)]
 #![allow(non_camel_case_types)]
 
 use std::mem;

src/test/run-pass/issues/issue-48159.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(repr_packed)]
-
 #[repr(packed)]
 pub struct P1S5 {
     a: u8,

src/test/run-pass/packed/auxiliary/packed.rs

@@ -12,8 +12,6 @@
 #![allow(dead_code)]
 // ignore-emscripten weird assertion?
 
-#![feature(repr_packed)]
-
 #[repr(packed)]
 struct Foo1 {
     bar: u8,

src/test/run-pass/packed/packed-struct-borrow-element.rs

@@ -10,11 +10,8 @@
 
 // run-pass
 #![allow(dead_code)]
-#![allow(stable_features)]
 #![allow(unused_comparisons)]
 
-#![feature(repr_packed)]
-
 use std::mem;
 
 #[repr(packed)]

src/test/run-pass/packed/packed-struct-generic-size.rs

@@ -1,35 +1,35 @@
 warning: unnecessary path disambiguator
-  --> $DIR/packed-struct-generic-size.rs:49:14
+  --> $DIR/packed-struct-generic-size.rs:46:14
    |
 LL |     check!(P1::<u8, u8>, 1, 3);
    |              ^^ try removing `::`
 
 warning: unnecessary path disambiguator
-  --> $DIR/packed-struct-generic-size.rs:50:14
+  --> $DIR/packed-struct-generic-size.rs:47:14
    |
 LL |     check!(P1::<u64, u16>, 1, 11);
    |              ^^ try removing `::`
 
 warning: unnecessary path disambiguator
-  --> $DIR/packed-struct-generic-size.rs:52:14
+  --> $DIR/packed-struct-generic-size.rs:49:14
    |
 LL |     check!(P2::<u8, u8>, 1, 3);
    |              ^^ try removing `::`
 
 warning: unnecessary path disambiguator
-  --> $DIR/packed-struct-generic-size.rs:53:14
+  --> $DIR/packed-struct-generic-size.rs:50:14
    |
 LL |     check!(P2::<u64, u16>, 2, 12);
    |              ^^ try removing `::`
 
 warning: unnecessary path disambiguator
-  --> $DIR/packed-struct-generic-size.rs:55:15
+  --> $DIR/packed-struct-generic-size.rs:52:15
    |
 LL |     check!(P4C::<u8, u8>, 1, 3);
    |               ^^ try removing `::`
 
 warning: unnecessary path disambiguator
-  --> $DIR/packed-struct-generic-size.rs:56:15
+  --> $DIR/packed-struct-generic-size.rs:53:15
    |
 LL |     check!(P4C::<u16, u64>, 4, 12);
    |               ^^ try removing `::`

src/test/run-pass/packed/packed-struct-generic-size.stderr

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 // run-pass
-#![feature(repr_packed)]
 
 #[repr(packed)]
 struct Foo1 {

src/test/run-pass/packed/packed-struct-match.rs

@@ -13,9 +13,6 @@
 #![allow(non_camel_case_types)]
 #![allow(non_upper_case_globals)]
 
-#![feature(repr_packed)]
-
-
 use std::mem;
 
 #[repr(packed)]