diff options
Diffstat (limited to 'compiler/rustc_codegen_gcc/tests/run/slice.rs')
-rw-r--r-- | compiler/rustc_codegen_gcc/tests/run/slice.rs | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_gcc/tests/run/slice.rs b/compiler/rustc_codegen_gcc/tests/run/slice.rs new file mode 100644 index 000000000..ad9258ed0 --- /dev/null +++ b/compiler/rustc_codegen_gcc/tests/run/slice.rs @@ -0,0 +1,128 @@ +// Compiler: +// +// Run-time: +// status: 0 +// stdout: 5 + +#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)] + +#![no_std] +#![no_core] + +/* + * Core + */ + +// Because we don't have core yet. +#[lang = "sized"] +pub trait Sized {} + +#[lang = "copy"] +trait Copy { +} + +impl Copy for isize {} +impl Copy for usize {} +impl Copy for i32 {} +impl Copy for u32 {} + +#[lang = "receiver"] +trait Receiver { +} + +#[lang = "freeze"] +pub(crate) unsafe auto trait Freeze {} + +mod libc { + #[link(name = "c")] + extern "C" { + pub fn printf(format: *const i8, ...) -> i32; + } +} + +#[lang = "index"] +pub trait Index<Idx: ?Sized> { + type Output: ?Sized; + fn index(&self, index: Idx) -> &Self::Output; +} + +impl<T> Index<usize> for [T; 3] { + type Output = T; + + fn index(&self, index: usize) -> &Self::Output { + &self[index] + } +} + +impl<T> Index<usize> for [T] { + type Output = T; + + fn index(&self, index: usize) -> &Self::Output { + &self[index] + } +} + +#[lang = "unsize"] +pub trait Unsize<T: ?Sized> {} + +#[lang = "coerce_unsized"] +pub trait CoerceUnsized<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<&'a mut U> for &'a mut T {} +impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {} +impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for *mut T {} + +#[lang = "drop_in_place"] +#[allow(unconditional_recursion)] +pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) { + // Code here does not matter - this is replaced by the + // real drop glue by the compiler. + drop_in_place(to_drop); +} + +#[lang = "panic_location"] +struct PanicLocation { + file: &'static str, + line: u32, + column: u32, +} + +#[lang = "panic_bounds_check"] +#[track_caller] +#[no_mangle] +fn panic_bounds_check(index: usize, len: usize) -> ! { + unsafe { + libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index); + intrinsics::abort(); + } +} + +mod intrinsics { + use super::Sized; + + extern "rust-intrinsic" { + pub fn abort() -> !; + } +} + +/* + * Code + */ + +static mut TWO: usize = 2; + +fn index_slice(s: &[u32]) -> u32 { + unsafe { + s[TWO] + } +} + +#[start] +fn main(mut argc: isize, _argv: *const *const u8) -> isize { + let array = [42, 7, 5]; + unsafe { + libc::printf(b"%ld\n\0" as *const u8 as *const i8, index_slice(&array)); + } + 0 +} |