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Auto merge of #100719 - CohenArthur:rust-safe-intrinsic-attribute, r=wesleywiser

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Add `#[rustc_safe_intrinsic]`

This PR adds the `#[rustc_safe_intrinsic]` attribute as mentionned on Zulip. The goal of this attribute is to avoid keeping a list of symbols as the source for stable intrinsics, and instead rely on an attribute. This is similar to `#[rustc_const_stable]` and `#[rustc_const_unstable]`, which among other things, are used to mark the constness of intrinsic functions.
This commit is contained in:
bors 2022-09-28 19:07:50 +00:00
commit ce7f0f1aa0
21 changed files with 113 additions and 10 deletions
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2
compiler/rustc_error_codes/src/error_codes/E0094.md
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@ -6,6 +6,7 @@ Erroneous code example:
#![feature(intrinsics)]
extern "rust-intrinsic" {
#[rustc_safe_intrinsic]
fn size_of<T, U>() -> usize; // error: intrinsic has wrong number
// of type parameters
}
@ -19,6 +20,7 @@ Example:
#![feature(intrinsics)]
extern "rust-intrinsic" {
#[rustc_safe_intrinsic]
fn size_of<T>() -> usize; // ok!
}
```

2
compiler/rustc_error_codes/src/error_codes/E0211.md
View file

@ -7,6 +7,7 @@ used. Erroneous code examples:
#![feature(intrinsics)]
extern "rust-intrinsic" {
#[rustc_safe_intrinsic]
fn size_of<T>(); // error: intrinsic has wrong type
}
@ -42,6 +43,7 @@ For the first code example, please check the function definition. Example:
#![feature(intrinsics)]
extern "rust-intrinsic" {
#[rustc_safe_intrinsic]
fn size_of<T>() -> usize; // ok!
}
```