Give built-in macros stable addresses in the standard library

src/libcore/clone.rs

@@ -133,6 +133,14 @@ pub trait Clone : Sized {
     }
 }
 
+/// Derive macro generating an impl of the trait `Clone`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics, derive_clone_copy)]
+pub macro Clone($item:item) { /* compiler built-in */ }
+
 // FIXME(aburka): these structs are used solely by #[derive] to
 // assert that every component of a type implements Clone or Copy.
 //

src/libcore/cmp.rs

@@ -200,6 +200,14 @@ pub trait PartialEq<Rhs: ?Sized = Self> {
     fn ne(&self, other: &Rhs) -> bool { !self.eq(other) }
 }
 
+/// Derive macro generating an impl of the trait `PartialEq`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics)]
+pub macro PartialEq($item:item) { /* compiler built-in */ }
+
 /// Trait for equality comparisons which are [equivalence relations](
 /// https://en.wikipedia.org/wiki/Equivalence_relation).
 ///
@@ -256,6 +264,14 @@ pub trait Eq: PartialEq<Self> {
     fn assert_receiver_is_total_eq(&self) {}
 }
 
+/// Derive macro generating an impl of the trait `Eq`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics, derive_eq)]
+pub macro Eq($item:item) { /* compiler built-in */ }
+
 // FIXME: this struct is used solely by #[derive] to
 // assert that every component of a type implements Eq.
 //
@@ -600,6 +616,14 @@ pub trait Ord: Eq + PartialOrd<Self> {
     }
 }
 
+/// Derive macro generating an impl of the trait `Ord`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics)]
+pub macro Ord($item:item) { /* compiler built-in */ }
+
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Eq for Ordering {}
 
@@ -842,6 +866,14 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
     }
 }
 
+/// Derive macro generating an impl of the trait `PartialOrd`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics)]
+pub macro PartialOrd($item:item) { /* compiler built-in */ }
+
 /// Compares and returns the minimum of two values.
 ///
 /// Returns the first argument if the comparison determines them to be equal.

src/libcore/default.rs

@@ -115,6 +115,14 @@ pub trait Default: Sized {
     fn default() -> Self;
 }
 
+/// Derive macro generating an impl of the trait `Default`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics)]
+pub macro Default($item:item) { /* compiler built-in */ }
+
 macro_rules! default_impl {
     ($t:ty, $v:expr, $doc:tt) => {
         #[stable(feature = "rust1", since = "1.0.0")]

src/libcore/fmt/mod.rs

@@ -545,6 +545,21 @@ pub trait Debug {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result;
 }
 
+// Separate module to reexport the macro `Debug` from prelude without the trait `Debug`.
+#[cfg(not(bootstrap))]
+pub(crate) mod macros {
+    /// Derive macro generating an impl of the trait `Debug`.
+    #[rustc_builtin_macro]
+    #[rustc_macro_transparency = "semitransparent"]
+    #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+    #[allow_internal_unstable(core_intrinsics)]
+    pub macro Debug($item:item) { /* compiler built-in */ }
+}
+#[cfg(not(bootstrap))]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[doc(inline)]
+pub use macros::Debug;
+
 /// Format trait for an empty format, `{}`.
 ///
 /// `Display` is similar to [`Debug`][debug], but `Display` is for user-facing

src/libcore/hash/mod.rs

@@ -198,6 +198,21 @@ pub trait Hash {
     }
 }
 
+// Separate module to reexport the macro `Hash` from prelude without the trait `Hash`.
+#[cfg(not(bootstrap))]
+pub(crate) mod macros {
+    /// Derive macro generating an impl of the trait `Hash`.
+    #[rustc_builtin_macro]
+    #[rustc_macro_transparency = "semitransparent"]
+    #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+    #[allow_internal_unstable(core_intrinsics)]
+    pub macro Hash($item:item) { /* compiler built-in */ }
+}
+#[cfg(not(bootstrap))]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[doc(inline)]
+pub use macros::Hash;
+
 /// A trait for hashing an arbitrary stream of bytes.
 ///
 /// Instances of `Hasher` usually represent state that is changed while hashing

src/libcore/macros.rs

@@ -714,9 +714,9 @@ pub(crate) mod builtin {
     /// [`panic!`]: ../std/macro.panic.html
     #[stable(feature = "compile_error_macro", since = "1.20.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro compile_error {
+    macro_rules! compile_error {
-        ($msg:expr) => ({ /* compiler built-in */ }),
+        ($msg:expr) => ({ /* compiler built-in */ });
         ($msg:expr,) => ({ /* compiler built-in */ })
     }
 
@@ -768,8 +768,10 @@ pub(crate) mod builtin {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[allow_internal_unstable(fmt_internals)]
     #[rustc_builtin_macro]
-    pub macro format_args {
+    #[macro_export]
-        ($fmt:expr) => ({ /* compiler built-in */ }),
+    #[rustc_macro_transparency = "opaque"]
+    macro_rules! format_args {
+        ($fmt:expr) => ({ /* compiler built-in */ });
         ($fmt:expr, $($args:tt)*) => ({ /* compiler built-in */ })
     }
 
@@ -779,8 +781,10 @@ pub(crate) mod builtin {
                          language use and is subject to change")]
     #[allow_internal_unstable(fmt_internals)]
     #[rustc_builtin_macro]
-    pub macro format_args_nl {
+    #[macro_export]
-        ($fmt:expr) => ({ /* compiler built-in */ }),
+    #[rustc_macro_transparency = "opaque"]
+    macro_rules! format_args_nl {
+        ($fmt:expr) => ({ /* compiler built-in */ });
         ($fmt:expr, $($args:tt)*) => ({ /* compiler built-in */ })
     }
 
@@ -817,9 +821,9 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro env {
+    macro_rules! env {
-        ($name:expr) => ({ /* compiler built-in */ }),
+        ($name:expr) => ({ /* compiler built-in */ });
         ($name:expr,) => ({ /* compiler built-in */ })
     }
 
@@ -844,9 +848,9 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro option_env {
+    macro_rules! option_env {
-        ($name:expr) => ({ /* compiler built-in */ }),
+        ($name:expr) => ({ /* compiler built-in */ });
         ($name:expr,) => ({ /* compiler built-in */ })
     }
 
@@ -877,9 +881,9 @@ pub(crate) mod builtin {
     #[unstable(feature = "concat_idents", issue = "29599",
                reason = "`concat_idents` is not stable enough for use and is subject to change")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro concat_idents {
+    macro_rules! concat_idents {
-        ($($e:ident),+) => ({ /* compiler built-in */ }),
+        ($($e:ident),+) => ({ /* compiler built-in */ });
         ($($e:ident,)+) => ({ /* compiler built-in */ })
     }
 
@@ -900,9 +904,9 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro concat {
+    macro_rules! concat {
-        ($($e:expr),*) => ({ /* compiler built-in */ }),
+        ($($e:expr),*) => ({ /* compiler built-in */ });
         ($($e:expr,)*) => ({ /* compiler built-in */ })
     }
 
@@ -929,8 +933,8 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro line() { /* compiler built-in */ }
+    macro_rules! line { () => { /* compiler built-in */ } }
 
     /// Expands to the column number at which it was invoked.
     ///
@@ -955,15 +959,15 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro column() { /* compiler built-in */ }
+    macro_rules! column { () => { /* compiler built-in */ } }
 
     /// Same as `column`, but less likely to be shadowed.
     #[unstable(feature = "__rust_unstable_column", issue = "0",
                reason = "internal implementation detail of the `panic` macro")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro __rust_unstable_column() { /* compiler built-in */ }
+    macro_rules! __rust_unstable_column { () => { /* compiler built-in */ } }
 
     /// Expands to the file name in which it was invoked.
     ///
@@ -987,8 +991,8 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro file() { /* compiler built-in */ }
+    macro_rules! file { () => { /* compiler built-in */ } }
 
     /// Stringifies its arguments.
     ///
@@ -1007,8 +1011,8 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro stringify($($t:tt)*) { /* compiler built-in */ }
+    macro_rules! stringify { ($($t:tt)*) => { /* compiler built-in */ } }
 
     /// Includes a utf8-encoded file as a string.
     ///
@@ -1042,9 +1046,9 @@ pub(crate) mod builtin {
     /// Compiling 'main.rs' and running the resulting binary will print "adiós".
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro include_str {
+    macro_rules! include_str {
-        ($file:expr) => ({ /* compiler built-in */ }),
+        ($file:expr) => ({ /* compiler built-in */ });
         ($file:expr,) => ({ /* compiler built-in */ })
     }
 
@@ -1080,9 +1084,9 @@ pub(crate) mod builtin {
     /// Compiling 'main.rs' and running the resulting binary will print "adiós".
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro include_bytes {
+    macro_rules! include_bytes {
-        ($file:expr) => ({ /* compiler built-in */ }),
+        ($file:expr) => ({ /* compiler built-in */ });
         ($file:expr,) => ({ /* compiler built-in */ })
     }
 
@@ -1105,8 +1109,8 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro module_path() { /* compiler built-in */ }
+    macro_rules! module_path { () => { /* compiler built-in */ } }
 
     /// Evaluates boolean combinations of configuration flags at compile-time.
     ///
@@ -1130,8 +1134,8 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro cfg($($cfg:tt)*) { /* compiler built-in */ }
+    macro_rules! cfg { ($($cfg:tt)*) => { /* compiler built-in */ } }
 
     /// Parses a file as an expression or an item according to the context.
     ///
@@ -1174,9 +1178,9 @@ pub(crate) mod builtin {
     /// "🙈🙊🙉🙈🙊🙉".
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro include {
+    macro_rules! include {
-        ($file:expr) => ({ /* compiler built-in */ }),
+        ($file:expr) => ({ /* compiler built-in */ });
         ($file:expr,) => ({ /* compiler built-in */ })
     }
 
@@ -1227,10 +1231,10 @@ pub(crate) mod builtin {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro assert {
+    macro_rules! assert {
-        ($cond:expr) => ({ /* compiler built-in */ }),
+        ($cond:expr) => ({ /* compiler built-in */ });
-        ($cond:expr,) => ({ /* compiler built-in */ }),
+        ($cond:expr,) => ({ /* compiler built-in */ });
         ($cond:expr, $($arg:tt)+) => ({ /* compiler built-in */ })
     }
 
@@ -1238,34 +1242,34 @@ pub(crate) mod builtin {
     #[unstable(feature = "asm", issue = "29722",
                reason = "inline assembly is not stable enough for use and is subject to change")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro asm("assembly template"
+    macro_rules! asm { ("assembly template"
-                  : $("output"(operand),)*
+                        : $("output"(operand),)*
-                  : $("input"(operand),)*
+                        : $("input"(operand),)*
-                  : $("clobbers",)*
+                        : $("clobbers",)*
-                  : $("options",)*) { /* compiler built-in */ }
+                        : $("options",)*) => { /* compiler built-in */ } }
 
     /// Module-level inline assembly.
     #[unstable(feature = "global_asm", issue = "35119",
                reason = "`global_asm!` is not stable enough for use and is subject to change")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro global_asm("assembly") { /* compiler built-in */ }
+    macro_rules! global_asm { ("assembly") => { /* compiler built-in */ } }
 
     /// Prints passed tokens into the standard output.
     #[unstable(feature = "log_syntax", issue = "29598",
                reason = "`log_syntax!` is not stable enough for use and is subject to change")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro log_syntax($($arg:tt)*) { /* compiler built-in */ }
+    macro_rules! log_syntax { ($($arg:tt)*) => { /* compiler built-in */ } }
 
     /// Enables or disables tracing functionality used for debugging other macros.
     #[unstable(feature = "trace_macros", issue = "29598",
                reason = "`trace_macros` is not stable enough for use and is subject to change")]
     #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
+    #[macro_export]
-    pub macro trace_macros {
+    macro_rules! trace_macros {
-        (true) => ({ /* compiler built-in */ }),
+        (true) => ({ /* compiler built-in */ });
         (false) => ({ /* compiler built-in */ })
     }
 
@@ -1299,69 +1303,6 @@ pub(crate) mod builtin {
     #[rustc_macro_transparency = "semitransparent"]
     pub macro global_allocator($item:item) { /* compiler built-in */ }
 
-    /// Derive macro generating an impl of the trait `Clone`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics, derive_clone_copy)]
-    pub macro Clone($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `Copy`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics, derive_clone_copy)]
-    pub macro Copy($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `Debug`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics)]
-    pub macro Debug($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `Default`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics)]
-    pub macro Default($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `Eq`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics, derive_eq)]
-    pub macro Eq($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `Hash`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics)]
-    pub macro Hash($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `Ord`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics)]
-    pub macro Ord($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `PartialEq`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics)]
-    pub macro PartialEq($item:item) { /* compiler built-in */ }
-
-    /// Derive macro generating an impl of the trait `PartialOrd`.
-    #[rustc_builtin_macro]
-    #[rustc_macro_transparency = "semitransparent"]
-    #[stable(feature = "rust1", since = "1.0.0")]
-    #[allow_internal_unstable(core_intrinsics)]
-    pub macro PartialOrd($item:item) { /* compiler built-in */ }
-
     /// Unstable implementation detail of the `rustc` compiler, do not use.
     #[rustc_builtin_macro]
     #[rustc_macro_transparency = "semitransparent"]

src/libcore/marker.rs

@@ -288,6 +288,14 @@ pub trait Copy : Clone {
     // Empty.
 }
 
+/// Derive macro generating an impl of the trait `Copy`.
+#[cfg(not(bootstrap))]
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow_internal_unstable(core_intrinsics, derive_clone_copy)]
+pub macro Copy($item:item) { /* compiler built-in */ }
+
 /// Types for which it is safe to share references between threads.
 ///
 /// This trait is automatically implemented when the compiler determines

src/libcore/prelude/v1.rs

@@ -48,24 +48,20 @@ pub use crate::result::Result::{self, Ok, Err};
 // Re-exported built-in macros
 #[cfg(not(bootstrap))]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
-#[allow(deprecated)]
 #[doc(no_inline)]
-pub use crate::macros::builtin::{
+pub use crate::fmt::macros::Debug;
-    Clone,
+#[cfg(not(bootstrap))]
-    Copy,
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
-    Debug,
+#[doc(no_inline)]
-    Default,
+pub use crate::hash::macros::Hash;
-    Eq,
+
-    Hash,
+#[cfg(not(bootstrap))]
-    Ord,
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
-    PartialEq,
+#[doc(no_inline)]
-    PartialOrd,
+pub use crate::{
-    RustcDecodable,
-    RustcEncodable,
     __rust_unstable_column,
     asm,
     assert,
-    bench,
     cfg,
     column,
     compile_error,
@@ -75,7 +71,6 @@ pub use crate::macros::builtin::{
     file,
     format_args,
     format_args_nl,
-    global_allocator,
     global_asm,
     include,
     include_bytes,
@@ -85,7 +80,18 @@ pub use crate::macros::builtin::{
     module_path,
     option_env,
     stringify,
-    test,
-    test_case,
     trace_macros,
 };
+
+#[cfg(not(bootstrap))]
+#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
+#[allow(deprecated)]
+#[doc(no_inline)]
+pub use crate::macros::builtin::{
+    RustcDecodable,
+    RustcEncodable,
+    bench,
+    global_allocator,
+    test,
+    test_case,
+};

src/libstd/lib.rs

@@ -326,16 +326,6 @@ use prelude::v1::*;
 // Access to Bencher, etc.
 #[cfg(test)] extern crate test;
 
-// Re-export a few macros from core
-#[stable(feature = "rust1", since = "1.0.0")]
-pub use core::{assert_eq, assert_ne, debug_assert, debug_assert_eq, debug_assert_ne};
-#[stable(feature = "rust1", since = "1.0.0")]
-pub use core::{unreachable, unimplemented, write, writeln, todo};
-// FIXME: change this to `#[allow(deprecated)]` when we update nightly compiler.
-#[allow(deprecated_in_future)]
-#[stable(feature = "rust1", since = "1.0.0")]
-pub use core::r#try;
-
 #[allow(unused_imports)] // macros from `alloc` are not used on all platforms
 #[macro_use]
 extern crate alloc as alloc_crate;
@@ -520,33 +510,52 @@ mod std_detect;
 #[cfg(not(test))]
 pub use std_detect::detect;
 
-// Document built-in macros in the crate root for consistency with libcore and existing tradition.
+// Re-export macros defined in libcore.
-// FIXME: Attribute and derive macros are not reexported because rustdoc renders them
+#[stable(feature = "rust1", since = "1.0.0")]
-// as reexports rather than as macros, and that's not what we want.
+#[allow(deprecated_in_future)]
-#[cfg(rustdoc)]
+pub use core::{
+    // Stable
+    assert_eq,
+    assert_ne,
+    debug_assert_eq,
+    debug_assert_ne,
+    debug_assert,
+    r#try,
+    unimplemented,
+    unreachable,
+    write,
+    writeln,
+    // Unstable
+    todo,
+};
+
+// Re-export built-in macros defined through libcore.
+#[cfg(not(bootstrap))]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
-pub use crate::prelude::v1::{
+pub use core::{
-    __rust_unstable_column,
+    // Stable
-    asm,
     assert,
     cfg,
     column,
     compile_error,
     concat,
-    concat_idents,
     env,
     file,
     format_args,
-    format_args_nl,
-    global_asm,
     include,
     include_bytes,
     include_str,
     line,
-    log_syntax,
     module_path,
     option_env,
     stringify,
+    // Unstable
+    __rust_unstable_column,
+    asm,
+    concat_idents,
+    format_args_nl,
+    global_asm,
+    log_syntax,
     trace_macros,
 };
 

src/test/ui/imports/issue-53512.rs

@@ -1,6 +1,7 @@
 // Macro from prelude is shadowed by non-existent import recovered as `Res::Err`.
 
-use std::assert; //~ ERROR unresolved import `std::assert`
+mod m {}
+use m::assert; //~ ERROR unresolved import `m::assert`
 
 fn main() {
     assert!(true);

src/test/ui/imports/issue-53512.stderr

@@ -1,8 +1,8 @@
-error[E0432]: unresolved import `std::assert`
+error[E0432]: unresolved import `m::assert`
-  --> $DIR/issue-53512.rs:3:5
+  --> $DIR/issue-53512.rs:4:5
    |
-LL | use std::assert;
+LL | use m::assert;
-   |     ^^^^^^^^^^^ no `assert` in the root
+   |     ^^^^^^^^^ no `assert` in `m`
 
 error: aborting due to previous error
 

src/test/ui/macros/builtin-prelude-no-accidents.rs

@@ -0,0 +1,8 @@
+// Names of public modules in libstd and libcore don't accidentally get into prelude
+// because macros with the same names are in prelude.
+
+fn main() {
+    env::current_dir; //~ ERROR use of undeclared type or module `env`
+    type A = panic::PanicInfo; //~ ERROR use of undeclared type or module `panic`
+    type B = vec::Vec<u8>; //~ ERROR use of undeclared type or module `vec`
+}

src/test/ui/macros/builtin-prelude-no-accidents.stderr

@@ -0,0 +1,21 @@
+error[E0433]: failed to resolve: use of undeclared type or module `env`
+  --> $DIR/builtin-prelude-no-accidents.rs:5:5
+   |
+LL |     env::current_dir;
+   |     ^^^ use of undeclared type or module `env`
+
+error[E0433]: failed to resolve: use of undeclared type or module `panic`
+  --> $DIR/builtin-prelude-no-accidents.rs:6:14
+   |
+LL |     type A = panic::PanicInfo;
+   |              ^^^^^ use of undeclared type or module `panic`
+
+error[E0433]: failed to resolve: use of undeclared type or module `vec`
+  --> $DIR/builtin-prelude-no-accidents.rs:7:14
+   |
+LL |     type B = vec::Vec<u8>;
+   |              ^^^ use of undeclared type or module `vec`
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0433`.

src/test/ui/macros/builtin-std-paths-fail.rs

@@ -0,0 +1,21 @@
+#[derive(
+    core::RustcDecodable, //~ ERROR could not find `RustcDecodable` in `core`
+    core::RustcDecodable, //~ ERROR could not find `RustcDecodable` in `core`
+)]
+#[core::bench] //~ ERROR could not find `bench` in `core`
+#[core::global_allocator] //~ ERROR could not find `global_allocator` in `core`
+#[core::test_case] //~ ERROR could not find `test_case` in `core`
+#[core::test] //~ ERROR could not find `test` in `core`
+struct Core;
+
+#[derive(
+    std::RustcDecodable, //~ ERROR could not find `RustcDecodable` in `std`
+    std::RustcDecodable, //~ ERROR could not find `RustcDecodable` in `std`
+)]
+#[std::bench] //~ ERROR could not find `bench` in `std`
+#[std::global_allocator] //~ ERROR could not find `global_allocator` in `std`
+#[std::test_case] //~ ERROR could not find `test_case` in `std`
+#[std::test] //~ ERROR could not find `test` in `std`
+struct Std;
+
+fn main() {}

src/test/ui/macros/builtin-std-paths-fail.stderr

@@ -0,0 +1,75 @@
+error[E0433]: failed to resolve: could not find `bench` in `core`
+  --> $DIR/builtin-std-paths-fail.rs:5:9
+   |
+LL | #[core::bench]
+   |         ^^^^^ could not find `bench` in `core`
+
+error[E0433]: failed to resolve: could not find `global_allocator` in `core`
+  --> $DIR/builtin-std-paths-fail.rs:6:9
+   |
+LL | #[core::global_allocator]
+   |         ^^^^^^^^^^^^^^^^ could not find `global_allocator` in `core`
+
+error[E0433]: failed to resolve: could not find `test_case` in `core`
+  --> $DIR/builtin-std-paths-fail.rs:7:9
+   |
+LL | #[core::test_case]
+   |         ^^^^^^^^^ could not find `test_case` in `core`
+
+error[E0433]: failed to resolve: could not find `test` in `core`
+  --> $DIR/builtin-std-paths-fail.rs:8:9
+   |
+LL | #[core::test]
+   |         ^^^^ could not find `test` in `core`
+
+error[E0433]: failed to resolve: could not find `RustcDecodable` in `core`
+  --> $DIR/builtin-std-paths-fail.rs:2:11
+   |
+LL |     core::RustcDecodable,
+   |           ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `core`
+
+error[E0433]: failed to resolve: could not find `RustcDecodable` in `core`
+  --> $DIR/builtin-std-paths-fail.rs:3:11
+   |
+LL |     core::RustcDecodable,
+   |           ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `core`
+
+error[E0433]: failed to resolve: could not find `bench` in `std`
+  --> $DIR/builtin-std-paths-fail.rs:15:8
+   |
+LL | #[std::bench]
+   |        ^^^^^ could not find `bench` in `std`
+
+error[E0433]: failed to resolve: could not find `global_allocator` in `std`
+  --> $DIR/builtin-std-paths-fail.rs:16:8
+   |
+LL | #[std::global_allocator]
+   |        ^^^^^^^^^^^^^^^^ could not find `global_allocator` in `std`
+
+error[E0433]: failed to resolve: could not find `test_case` in `std`
+  --> $DIR/builtin-std-paths-fail.rs:17:8
+   |
+LL | #[std::test_case]
+   |        ^^^^^^^^^ could not find `test_case` in `std`
+
+error[E0433]: failed to resolve: could not find `test` in `std`
+  --> $DIR/builtin-std-paths-fail.rs:18:8
+   |
+LL | #[std::test]
+   |        ^^^^ could not find `test` in `std`
+
+error[E0433]: failed to resolve: could not find `RustcDecodable` in `std`
+  --> $DIR/builtin-std-paths-fail.rs:12:10
+   |
+LL |     std::RustcDecodable,
+   |          ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `std`
+
+error[E0433]: failed to resolve: could not find `RustcDecodable` in `std`
+  --> $DIR/builtin-std-paths-fail.rs:13:10
+   |
+LL |     std::RustcDecodable,
+   |          ^^^^^^^^^^^^^^ could not find `RustcDecodable` in `std`
+
+error: aborting due to 12 previous errors
+
+For more information about this error, try `rustc --explain E0433`.

src/test/ui/macros/builtin-std-paths.rs

@@ -0,0 +1,32 @@
+// check-pass
+
+#[derive(
+    core::clone::Clone,
+    core::marker::Copy,
+    core::fmt::Debug,
+    core::default::Default,
+    core::cmp::Eq,
+    core::hash::Hash,
+    core::cmp::Ord,
+    core::cmp::PartialEq,
+    core::cmp::PartialOrd,
+)]
+struct Core;
+
+#[derive(
+    std::clone::Clone,
+    std::marker::Copy,
+    std::fmt::Debug,
+    std::default::Default,
+    std::cmp::Eq,
+    std::hash::Hash,
+    std::cmp::Ord,
+    std::cmp::PartialEq,
+    std::cmp::PartialOrd,
+)]
+struct Std;
+
+fn main() {
+    core::column!();
+    std::column!();
+}