Thanks to visit codestin.com
Credit goes to github.com

Skip to content

Custom MIR: Allow optional RET type annotation #109392

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Mar 23, 2023
Merged

Custom MIR: Allow optional RET type annotation #109392

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
9da1da9
Allow optional RET type annotation
cbeuw Mar 20, 2023
9dc275b
Add documentation for `type RET = ...`
cbeuw Mar 20, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Prev Previous commit
Add documentation for type RET = ...
  • Loading branch information
@cbeuw
cbeuw committed Mar 20, 2023
commit 9dc275bb54ab088ac85a08dc807984afd57a78c7
14 changes: 14 additions & 0 deletions library/core/src/intrinsics/mir.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,8 @@
//!
//! The input to the [`mir!`] macro is:
//!
//! - An optional return type annotation in the form of `type RET = ...;`. This may be required
//! if the compiler cannot infer the type of RET.
//! - A possibly empty list of local declarations. Locals can also be declared inline on
//! assignments via `let`. Type inference generally works. Shadowing does not.
//! - A list of basic blocks. The first of these is the start block and is where execution begins.
Expand Down Expand Up @@ -124,6 +126,18 @@
//! }
//! )
//! }
//!
//! #[custom_mir(dialect = "runtime", phase = "optimized")]
//! fn annotated_return_type() -> (i32, bool) {
//! mir!(
//! type RET = (i32, bool);
//! {
//! RET.0 = 1;
//! RET.1 = true;
//! Return()
//! }
//! )
//! }
//! ```
//!
//! We can also set off compilation failures that happen in sufficiently late stages of the
Expand Down