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65 lines
2.0 KiB
Rust
65 lines
2.0 KiB
Rust
//! Ensure that unstable intrinsics can actually not be called,
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//! neither within a crate nor cross-crate.
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//@ aux-build:unstable_intrinsic.rs
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#![feature(staged_api, rustc_attrs, intrinsics)]
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#![stable(since="1.0.0", feature = "stable")]
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#![feature(local)]
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extern crate unstable_intrinsic;
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fn main() {
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const_main();
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}
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const fn const_main() {
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let x = 42;
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unsafe {
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unstable_intrinsic::size_of_val(&x);
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//~^ERROR: unstable library feature `unstable`
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//~|ERROR: not yet stable as a const intrinsic
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unstable_intrinsic::min_align_of_val(&x);
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//~^ERROR: unstable library feature `unstable`
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//~|ERROR: not yet stable as a const intrinsic
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size_of_val(&x);
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//~^ERROR: cannot use `#[feature(local)]`
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min_align_of_val(&x);
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//~^ERROR: cannot use `#[feature(local)]`
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}
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}
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#[unstable(feature = "local", issue = "42")]
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#[rustc_intrinsic]
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#[rustc_intrinsic_must_be_overridden]
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pub const unsafe fn size_of_val<T>(x: *const T) -> usize { 42 }
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#[unstable(feature = "local", issue = "42")]
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#[rustc_const_unstable(feature = "local", issue = "42")]
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#[rustc_intrinsic]
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#[rustc_intrinsic_must_be_overridden]
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pub const unsafe fn min_align_of_val<T>(x: *const T) -> usize { 42 }
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#[stable(feature = "rust1", since = "1.0.0")]
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#[rustc_const_stable(feature = "const_intrinsic_copy", since = "1.63.0")]
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#[inline]
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pub const unsafe fn copy<T>(src: *const T, dst: *mut T, count: usize) {
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// Const stability attributes are not inherited from parent items.
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#[rustc_intrinsic]
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#[rustc_intrinsic_must_be_overridden]
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const unsafe fn copy<T>(src: *const T, dst: *mut T, count: usize) {
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unimplemented!()
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}
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unsafe { copy(src, dst, count) }
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//~^ ERROR cannot be (indirectly) exposed to stable
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}
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// Ensure that a fallback body is recursively-const-checked.
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mod fallback {
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#[rustc_intrinsic]
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const unsafe fn copy<T>(src: *const T, _dst: *mut T, _count: usize) {
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super::size_of_val(src);
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//~^ ERROR cannot use `#[feature(local)]`
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}
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}
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