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Introduce built-in macros through libcore

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This commit is contained in:
Vadim Petrochenkov 2019-06-20 11:52:31 +03:00
parent 4268e7ee22
commit 8eaf17bca2
46 changed files with 499 additions and 969 deletions
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10
src/libstd/error.rs
View file

@ -254,8 +254,8 @@ impl<'a, E: Error + 'a> From<E> for Box<dyn Error + 'a> {
#[stable(feature = "rust1", since = "1.0.0")]
impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync + 'a> {
/// Converts a type of [`Error`] + [`Send`] + [`Sync`] into a box of dyn [`Error`] +
/// [`Send`] + [`Sync`].
/// Converts a type of [`Error`] + [`trait@Send`] + [`trait@Sync`] into a box of
/// dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
///
/// [`Error`]: ../error/trait.Error.html
///
@ -298,7 +298,7 @@ impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync +
#[stable(feature = "rust1", since = "1.0.0")]
impl From<String> for Box<dyn Error + Send + Sync> {
/// Converts a [`String`] into a box of dyn [`Error`] + [`Send`] + [`Sync`].
/// Converts a [`String`] into a box of dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
///
/// [`Error`]: ../error/trait.Error.html
///
@ -362,7 +362,7 @@ impl From<String> for Box<dyn Error> {
#[stable(feature = "rust1", since = "1.0.0")]
impl<'a> From<&str> for Box<dyn Error + Send + Sync + 'a> {
/// Converts a [`str`] into a box of dyn [`Error`] + [`Send`] + [`Sync`].
/// Converts a [`str`] into a box of dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
///
/// [`Error`]: ../error/trait.Error.html
///
@ -405,7 +405,7 @@ impl From<&str> for Box<dyn Error> {
#[stable(feature = "cow_box_error", since = "1.22.0")]
impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Send + Sync + 'a> {
/// Converts a [`Cow`] into a box of dyn [`Error`] + [`Send`] + [`Sync`].
/// Converts a [`Cow`] into a box of dyn [`Error`] + [`trait@Send`] + [`trait@Sync`].
///
/// [`Cow`]: ../borrow/enum.Cow.html
/// [`Error`]: ../error/trait.Error.html

40
src/libstd/lib.rs
View file

@ -221,14 +221,15 @@
#![cfg_attr(test, feature(print_internals, set_stdio, test, update_panic_count))]
#![cfg_attr(all(target_vendor = "fortanix", target_env = "sgx"),
feature(global_asm, slice_index_methods,
decl_macro, coerce_unsized, sgx_platform, ptr_wrapping_offset_from))]
feature(slice_index_methods, decl_macro, coerce_unsized,
sgx_platform, ptr_wrapping_offset_from))]
#![cfg_attr(all(test, target_vendor = "fortanix", target_env = "sgx"),
feature(fixed_size_array, maybe_uninit_extra))]
// std is implemented with unstable features, many of which are internal
// compiler details that will never be stable
// NB: the following list is sorted to minimize merge conflicts.
#![cfg_attr(not(bootstrap), feature(__rust_unstable_column))]
#![feature(alloc_error_handler)]
#![feature(alloc_layout_extra)]
#![feature(allocator_api)]
@ -251,6 +252,7 @@
#![feature(const_cstr_unchecked)]
#![feature(const_raw_ptr_deref)]
#![feature(core_intrinsics)]
#![feature(custom_test_frameworks)]
#![feature(doc_alias)]
#![feature(doc_cfg)]
#![feature(doc_keyword)]
@ -262,7 +264,9 @@
#![feature(exhaustive_patterns)]
#![feature(external_doc)]
#![feature(fn_traits)]
#![feature(format_args_nl)]
#![feature(generator_trait)]
#![feature(global_asm)]
#![feature(hash_raw_entry)]
#![feature(hashmap_internals)]
#![feature(int_error_internals)]
@ -272,6 +276,7 @@
#![feature(libc)]
#![feature(link_args)]
#![feature(linkage)]
#![feature(log_syntax)]
#![feature(maybe_uninit_ref)]
#![feature(maybe_uninit_slice)]
#![feature(mem_take)]
@ -303,6 +308,7 @@
#![feature(thread_local)]
#![feature(todo_macro)]
#![feature(toowned_clone_into)]
#![feature(trace_macros)]
#![feature(try_reserve)]
#![feature(unboxed_closures)]
#![feature(untagged_unions)]
@ -510,6 +516,36 @@ 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.
// FIXME: Attribute and derive macros are not reexported because rustdoc renders them
// as reexports rather than as macros, and that's not what we want.
#[cfg(rustdoc)]
#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
pub use crate::prelude::v1::{
__rust_unstable_column,
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,
trace_macros,
};
// Include a number of private modules that exist solely to provide
// the rustdoc documentation for primitive types. Using `include!`
// because rustdoc only looks for these modules at the crate level.

531
src/libstd/macros.rs
View file

@ -365,534 +365,3 @@ macro_rules! assert_approx_eq {
"{} is not approximately equal to {}", *a, *b);
})
}
/// Built-in macros to the compiler itself.
///
/// These macros do not have any corresponding definition with a `macro_rules!`
/// macro, but are documented here. Their implementations can be found hardcoded
/// into libsyntax itself.
#[cfg(rustdoc)]
mod builtin {
/// Causes compilation to fail with the given error message when encountered.
///
/// This macro should be used when a crate uses a conditional compilation strategy to provide
/// better error messages for erroneous conditions. It's the compiler-level form of [`panic!`],
/// which emits an error at *runtime*, rather than during compilation.
///
/// # Examples
///
/// Two such examples are macros and `#[cfg]` environments.
///
/// Emit better compiler error if a macro is passed invalid values. Without the final branch,
/// the compiler would still emit an error, but the error's message would not mention the two
/// valid values.
///
/// ```compile_fail
/// macro_rules! give_me_foo_or_bar {
/// (foo) => {};
/// (bar) => {};
/// ($x:ident) => {
/// compile_error!("This macro only accepts `foo` or `bar`");
/// }
/// }
///
/// give_me_foo_or_bar!(neither);
/// // ^ will fail at compile time with message "This macro only accepts `foo` or `bar`"
/// ```
///
/// Emit compiler error if one of a number of features isn't available.
///
/// ```compile_fail
/// #[cfg(not(any(feature = "foo", feature = "bar")))]
/// compile_error!("Either feature \"foo\" or \"bar\" must be enabled for this crate.");
/// ```
///
/// [`panic!`]: ../std/macro.panic.html
#[stable(feature = "compile_error_macro", since = "1.20.0")]
#[rustc_builtin_macro]
macro_rules! compile_error {
($msg:expr) => ({ /* compiler built-in */ });
($msg:expr,) => ({ /* compiler built-in */ });
}
/// Constructs parameters for the other string-formatting macros.
///
/// This macro functions by taking a formatting string literal containing
/// `{}` for each additional argument passed. `format_args!` prepares the
/// additional parameters to ensure the output can be interpreted as a string
/// and canonicalizes the arguments into a single type. Any value that implements
/// the [`Display`] trait can be passed to `format_args!`, as can any
/// [`Debug`] implementation be passed to a `{:?}` within the formatting string.
///
/// This macro produces a value of type [`fmt::Arguments`]. This value can be
/// passed to the macros within [`std::fmt`] for performing useful redirection.
/// All other formatting macros ([`format!`], [`write!`], [`println!`], etc) are
/// proxied through this one. `format_args!`, unlike its derived macros, avoids
/// heap allocations.
///
/// You can use the [`fmt::Arguments`] value that `format_args!` returns
/// in `Debug` and `Display` contexts as seen below. The example also shows
/// that `Debug` and `Display` format to the same thing: the interpolated
/// format string in `format_args!`.
///
/// ```rust
/// let debug = format!("{:?}", format_args!("{} foo {:?}", 1, 2));
/// let display = format!("{}", format_args!("{} foo {:?}", 1, 2));
/// assert_eq!("1 foo 2", display);
/// assert_eq!(display, debug);
/// ```
///
/// For more information, see the documentation in [`std::fmt`].
///
/// [`Display`]: ../std/fmt/trait.Display.html
/// [`Debug`]: ../std/fmt/trait.Debug.html
/// [`fmt::Arguments`]: ../std/fmt/struct.Arguments.html
/// [`std::fmt`]: ../std/fmt/index.html
/// [`format!`]: ../std/macro.format.html
/// [`write!`]: ../std/macro.write.html
/// [`println!`]: ../std/macro.println.html
///
/// # Examples
///
/// ```
/// use std::fmt;
///
/// let s = fmt::format(format_args!("hello {}", "world"));
/// assert_eq!(s, format!("hello {}", "world"));
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! format_args {
($fmt:expr) => ({ /* compiler built-in */ });
($fmt:expr, $($args:tt)*) => ({ /* compiler built-in */ });
}
/// Inspects an environment variable at compile time.
///
/// This macro will expand to the value of the named environment variable at
/// compile time, yielding an expression of type `&'static str`.
///
/// If the environment variable is not defined, then a compilation error
/// will be emitted. To not emit a compile error, use the [`option_env!`]
/// macro instead.
///
/// [`option_env!`]: ../std/macro.option_env.html
///
/// # Examples
///
/// ```
/// let path: &'static str = env!("PATH");
/// println!("the $PATH variable at the time of compiling was: {}", path);
/// ```
///
/// You can customize the error message by passing a string as the second
/// parameter:
///
/// ```compile_fail
/// let doc: &'static str = env!("documentation", "what's that?!");
/// ```
///
/// If the `documentation` environment variable is not defined, you'll get
/// the following error:
///
/// ```text
/// error: what's that?!
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! env {
($name:expr) => ({ /* compiler built-in */ });
($name:expr,) => ({ /* compiler built-in */ });
}
/// Optionally inspects an environment variable at compile time.
///
/// If the named environment variable is present at compile time, this will
/// expand into an expression of type `Option<&'static str>` whose value is
/// `Some` of the value of the environment variable. If the environment
/// variable is not present, then this will expand to `None`. See
/// [`Option<T>`][option] for more information on this type.
///
/// A compile time error is never emitted when using this macro regardless
/// of whether the environment variable is present or not.
///
/// [option]: ../std/option/enum.Option.html
///
/// # Examples
///
/// ```
/// let key: Option<&'static str> = option_env!("SECRET_KEY");
/// println!("the secret key might be: {:?}", key);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! option_env {
($name:expr) => ({ /* compiler built-in */ });
($name:expr,) => ({ /* compiler built-in */ });
}
/// Concatenates identifiers into one identifier.
///
/// This macro takes any number of comma-separated identifiers, and
/// concatenates them all into one, yielding an expression which is a new
/// identifier. Note that hygiene makes it such that this macro cannot
/// capture local variables. Also, as a general rule, macros are only
/// allowed in item, statement or expression position. That means while
/// you may use this macro for referring to existing variables, functions or
/// modules etc, you cannot define a new one with it.
///
/// # Examples
///
/// ```
/// #![feature(concat_idents)]
///
/// # fn main() {
/// fn foobar() -> u32 { 23 }
///
/// let f = concat_idents!(foo, bar);
/// println!("{}", f());
///
/// // fn concat_idents!(new, fun, name) { } // not usable in this way!
/// # }
/// ```
#[unstable(feature = "concat_idents_macro", issue = "29599")]
#[rustc_builtin_macro]
macro_rules! concat_idents {
($($e:ident),+) => ({ /* compiler built-in */ });
($($e:ident,)+) => ({ /* compiler built-in */ });
}
/// Concatenates literals into a static string slice.
///
/// This macro takes any number of comma-separated literals, yielding an
/// expression of type `&'static str` which represents all of the literals
/// concatenated left-to-right.
///
/// Integer and floating point literals are stringified in order to be
/// concatenated.
///
/// # Examples
///
/// ```
/// let s = concat!("test", 10, 'b', true);
/// assert_eq!(s, "test10btrue");
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! concat {
($($e:expr),*) => ({ /* compiler built-in */ });
($($e:expr,)*) => ({ /* compiler built-in */ });
}
/// Expands to the line number on which it was invoked.
///
/// With [`column!`] and [`file!`], these macros provide debugging information for
/// developers about the location within the source.
///
/// The expanded expression has type `u32` and is 1-based, so the first line
/// in each file evaluates to 1, the second to 2, etc. This is consistent
/// with error messages by common compilers or popular editors.
/// The returned line is *not necessarily* the line of the `line!` invocation itself,
/// but rather the first macro invocation leading up to the invocation
/// of the `line!` macro.
///
/// [`column!`]: macro.column.html
/// [`file!`]: macro.file.html
///
/// # Examples
///
/// ```
/// let current_line = line!();
/// println!("defined on line: {}", current_line);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! line { () => ({ /* compiler built-in */ }) }
/// Expands to the column number at which it was invoked.
///
/// With [`line!`] and [`file!`], these macros provide debugging information for
/// developers about the location within the source.
///
/// The expanded expression has type `u32` and is 1-based, so the first column
/// in each line evaluates to 1, the second to 2, etc. This is consistent
/// with error messages by common compilers or popular editors.
/// The returned column is *not necessarily* the line of the `column!` invocation itself,
/// but rather the first macro invocation leading up to the invocation
/// of the `column!` macro.
///
/// [`line!`]: macro.line.html
/// [`file!`]: macro.file.html
///
/// # Examples
///
/// ```
/// let current_col = column!();
/// println!("defined on column: {}", current_col);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! column { () => ({ /* compiler built-in */ }) }
/// Expands to the file name in which it was invoked.
///
/// With [`line!`] and [`column!`], these macros provide debugging information for
/// developers about the location within the source.
///
///
/// The expanded expression has type `&'static str`, and the returned file
/// is not the invocation of the `file!` macro itself, but rather the
/// first macro invocation leading up to the invocation of the `file!`
/// macro.
///
/// [`line!`]: macro.line.html
/// [`column!`]: macro.column.html
///
/// # Examples
///
/// ```
/// let this_file = file!();
/// println!("defined in file: {}", this_file);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! file { () => ({ /* compiler built-in */ }) }
/// Stringifies its arguments.
///
/// This macro will yield an expression of type `&'static str` which is the
/// stringification of all the tokens passed to the macro. No restrictions
/// are placed on the syntax of the macro invocation itself.
///
/// Note that the expanded results of the input tokens may change in the
/// future. You should be careful if you rely on the output.
///
/// # Examples
///
/// ```
/// let one_plus_one = stringify!(1 + 1);
/// assert_eq!(one_plus_one, "1 + 1");
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! stringify { ($($t:tt)*) => ({ /* compiler built-in */ }) }
/// Includes a utf8-encoded file as a string.
///
/// The file is located relative to the current file. (similarly to how
/// modules are found)
///
/// This macro will yield an expression of type `&'static str` which is the
/// contents of the file.
///
/// # Examples
///
/// Assume there are two files in the same directory with the following
/// contents:
///
/// File 'spanish.in':
///
/// ```text
/// adiós
/// ```
///
/// File 'main.rs':
///
/// ```ignore (cannot-doctest-external-file-dependency)
/// fn main() {
/// let my_str = include_str!("spanish.in");
/// assert_eq!(my_str, "adiós\n");
/// print!("{}", my_str);
/// }
/// ```
///
/// Compiling 'main.rs' and running the resulting binary will print "adiós".
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! include_str {
($file:expr) => ({ /* compiler built-in */ });
($file:expr,) => ({ /* compiler built-in */ });
}
/// Includes a file as a reference to a byte array.
///
/// The file is located relative to the current file. (similarly to how
/// modules are found)
///
/// This macro will yield an expression of type `&'static [u8; N]` which is
/// the contents of the file.
///
/// # Examples
///
/// Assume there are two files in the same directory with the following
/// contents:
///
/// File 'spanish.in':
///
/// ```text
/// adiós
/// ```
///
/// File 'main.rs':
///
/// ```ignore (cannot-doctest-external-file-dependency)
/// fn main() {
/// let bytes = include_bytes!("spanish.in");
/// assert_eq!(bytes, b"adi\xc3\xb3s\n");
/// print!("{}", String::from_utf8_lossy(bytes));
/// }
/// ```
///
/// Compiling 'main.rs' and running the resulting binary will print "adiós".
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! include_bytes {
($file:expr) => ({ /* compiler built-in */ });
($file:expr,) => ({ /* compiler built-in */ });
}
/// Expands to a string that represents the current module path.
///
/// The current module path can be thought of as the hierarchy of modules
/// leading back up to the crate root. The first component of the path
/// returned is the name of the crate currently being compiled.
///
/// # Examples
///
/// ```
/// mod test {
/// pub fn foo() {
/// assert!(module_path!().ends_with("test"));
/// }
/// }
///
/// test::foo();
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! module_path { () => ({ /* compiler built-in */ }) }
/// Evaluates boolean combinations of configuration flags at compile-time.
///
/// In addition to the `#[cfg]` attribute, this macro is provided to allow
/// boolean expression evaluation of configuration flags. This frequently
/// leads to less duplicated code.
///
/// The syntax given to this macro is the same syntax as the [`cfg`]
/// attribute.
///
/// [`cfg`]: ../reference/conditional-compilation.html#the-cfg-attribute
///
/// # Examples
///
/// ```
/// let my_directory = if cfg!(windows) {
/// "windows-specific-directory"
/// } else {
/// "unix-directory"
/// };
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! cfg { ($($cfg:tt)*) => ({ /* compiler built-in */ }) }
/// Parses a file as an expression or an item according to the context.
///
/// The file is located relative to the current file (similarly to how
/// modules are found).
///
/// Using this macro is often a bad idea, because if the file is
/// parsed as an expression, it is going to be placed in the
/// surrounding code unhygienically. This could result in variables
/// or functions being different from what the file expected if
/// there are variables or functions that have the same name in
/// the current file.
///
/// # Examples
///
/// Assume there are two files in the same directory with the following
/// contents:
///
/// File 'monkeys.in':
///
/// ```ignore (only-for-syntax-highlight)
/// ['🙈', '🙊', '🙉']
/// .iter()
/// .cycle()
/// .take(6)
/// .collect::<String>()
/// ```
///
/// File 'main.rs':
///
/// ```ignore (cannot-doctest-external-file-dependency)
/// fn main() {
/// let my_string = include!("monkeys.in");
/// assert_eq!("🙈🙊🙉🙈🙊🙉", my_string);
/// println!("{}", my_string);
/// }
/// ```
///
/// Compiling 'main.rs' and running the resulting binary will print
/// "🙈🙊🙉🙈🙊🙉".
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! include {
($file:expr) => ({ /* compiler built-in */ });
($file:expr,) => ({ /* compiler built-in */ });
}
/// Asserts that a boolean expression is `true` at runtime.
///
/// This will invoke the [`panic!`] macro if the provided expression cannot be
/// evaluated to `true` at runtime.
///
/// # Uses
///
/// Assertions are always checked in both debug and release builds, and cannot
/// be disabled. See [`debug_assert!`] for assertions that are not enabled in
/// release builds by default.
///
/// Unsafe code relies on `assert!` to enforce run-time invariants that, if
/// violated could lead to unsafety.
///
/// Other use-cases of `assert!` include testing and enforcing run-time
/// invariants in safe code (whose violation cannot result in unsafety).
///
/// # Custom Messages
///
/// This macro has a second form, where a custom panic message can
/// be provided with or without arguments for formatting. See [`std::fmt`]
/// for syntax for this form.
///
/// [`panic!`]: macro.panic.html
/// [`debug_assert!`]: macro.debug_assert.html
/// [`std::fmt`]: ../std/fmt/index.html
///
/// # Examples
///
/// ```
/// // the panic message for these assertions is the stringified value of the
/// // expression given.
/// assert!(true);
///
/// fn some_computation() -> bool { true } // a very simple function
///
/// assert!(some_computation());
///
/// // assert with a custom message
/// let x = true;
/// assert!(x, "x wasn't true!");
///
/// let a = 3; let b = 27;
/// assert!(a + b == 30, "a = {}, b = {}", a, b);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_builtin_macro]
macro_rules! assert {
($cond:expr) => ({ /* compiler built-in */ });
($cond:expr,) => ({ /* compiler built-in */ });
($cond:expr, $($arg:tt)+) => ({ /* compiler built-in */ });
}
}

63
src/libstd/prelude/v1.rs
View file

@ -7,9 +7,13 @@
#![stable(feature = "rust1", since = "1.0.0")]
// Re-exported core operators
#[cfg(bootstrap)]
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::marker::{Copy, Send, Sized, Sync, Unpin};
pub use crate::marker::Copy;
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::marker::{Send, Sized, Sync, Unpin};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::ops::{Drop, Fn, FnMut, FnOnce};
@ -20,15 +24,18 @@ pub use crate::ops::{Drop, Fn, FnMut, FnOnce};
pub use crate::mem::drop;
// Re-exported types and traits
#[cfg(bootstrap)]
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::clone::Clone;
#[cfg(bootstrap)]
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::cmp::{PartialEq, PartialOrd, Eq, Ord};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::convert::{AsRef, AsMut, Into, From};
#[cfg(bootstrap)]
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::default::Default;
@ -45,6 +52,60 @@ pub use crate::option::Option::{self, Some, None};
#[doc(no_inline)]
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")]
#[doc(no_inline)]
pub use core::prelude::v1::{
__rust_unstable_column,
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,
trace_macros,
};
// FIXME: Attribute and derive macros are not documented because for them rustdoc generates
// dead links which fail link checker testing.
#[cfg(not(bootstrap))]
#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
#[allow(deprecated)]
#[doc(hidden)]
pub use core::prelude::v1::{
Clone,
Copy,
Debug,
Decodable,
Default,
Encodable,
Eq,
Hash,
Ord,
PartialEq,
PartialOrd,
RustcDecodable,
RustcEncodable,
bench,
global_allocator,
test,
test_case,
};
// The file so far is equivalent to src/libcore/prelude/v1.rs,
// and below to src/liballoc/prelude.rs.