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//! This is a fixture we use for tests that need lang items.
//!
//! We want to include the minimal subset of core for each test, so this file
//! supports "conditional compilation". Tests use the following syntax to include minicore:
//!
//! //- minicore: flag1, flag2
//!
//! We then strip all the code marked with other flags.
//!
//! Available flags:
//! sized:
//! slice:
//! range:
//! unsize: sized
//! deref: sized
//! coerce_unsized: unsize
//! pin:
//! future: pin
//! option:
//! result:
pub mod marker {
// region:sized
#[lang = "sized"]
#[fundamental]
#[rustc_specialization_trait]
pub trait Sized {}
// endregion:sized
// region:unsize
#[lang = "unsize"]
pub trait Unsize<T: ?Sized> {}
// endregion:unsize
}
pub mod ops {
// region:coerce_unsized
mod unsize {
use crate::marker::Unsize;
#[lang = "coerce_unsized"]
pub trait CoerceUnsized<T: ?Sized> {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a mut U> for &'a mut T {}
impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b mut T {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for &'a mut T {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for &'a mut T {}
impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b T {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for &'a T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for *mut T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *mut T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {}
}
pub use self::unsize::CoerceUnsized;
// endregion:coerce_unsized
// region:deref
mod deref {
#[lang = "deref"]
pub trait Deref {
#[lang = "deref_target"]
type Target: ?Sized;
fn deref(&self) -> &Self::Target;
}
}
pub use self::deref::Deref;
// endregion:deref
// region:range
mod range {
#[lang = "RangeFull"]
pub struct RangeFull;
#[lang = "Range"]
pub struct Range<Idx> {
pub start: Idx,
pub end: Idx,
}
#[lang = "RangeFrom"]
pub struct RangeFrom<Idx> {
pub start: Idx,
}
#[lang = "RangeTo"]
pub struct RangeTo<Idx> {
pub end: Idx,
}
#[lang = "RangeInclusive"]
pub struct RangeInclusive<Idx> {
pub(crate) start: Idx,
pub(crate) end: Idx,
pub(crate) exhausted: bool,
}
#[lang = "RangeToInclusive"]
pub struct RangeToInclusive<Idx> {
pub end: Idx,
}
}
pub use self::range::{Range, RangeFrom, RangeFull, RangeTo};
pub use self::range::{RangeInclusive, RangeToInclusive};
// endregion:range
}
// region:slice
pub mod slice {
#[lang = "slice"]
impl<T> [T] {
pub fn len(&self) -> usize {
loop {}
}
}
}
// endregion:slice
// region:option
pub mod option {
pub enum Option<T> {
#[lang = "None"]
None,
#[lang = "Some"]
Some(T),
}
}
// endregion:option
// region:result
pub mod result {
pub enum Result<T, E> {
#[lang = "Ok"]
Ok(T),
#[lang = "Err"]
Err(E),
}
}
// endregion:result
// region:pin
pub mod pin {
#[lang = "pin"]
#[fundamental]
pub struct Pin<P> {
pointer: P,
}
}
// endregion:pin
// region:future
pub mod future {
use crate::{
pin::Pin,
task::{Context, Poll},
};
#[lang = "future_trait"]
pub trait Future {
type Output;
#[lang = "poll"]
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>;
}
}
pub mod task {
pub enum Poll<T> {
#[lang = "Ready"]
Ready(T),
#[lang = "Pending"]
Pending,
}
pub struct Context<'a> {
waker: &'a (),
}
}
// endregion:future
pub mod prelude {
pub mod v1 {
pub use crate::{
marker::Sized, // :sized
option::Option::{self, None, Some}, // :option
result::Result::{self, Err, Ok}, // :result
};
}
pub mod rust_2015 {
pub use super::v1::*;
}
pub mod rust_2018 {
pub use super::v1::*;
}
pub mod rust_2021 {
pub use super::v1::*;
}
}
#[prelude_import]
#[allow(unused)]
use prelude::v1::*;
|
