Skip to content

Clean up E0743 explanation #75007

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 1 commit into from
Aug 1, 2020
Merged

Clean up E0743 explanation #75007

Changes from all commits
Commits
Show all changes
1 commit
Select commit
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
11 changes: 5 additions & 6 deletions src/librustc_error_codes/error_codes/E0743.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,10 +8,9 @@ Erroneous code example:
fn foo2(x: u8, y: &...) {} // error!
```

Only foreign functions can use the C-variadic type (`...`).
In such functions, `...` may only occur non-nested.
That is, `y: &'a ...` is not allowed.
Only foreign functions can use the C-variadic type (`...`). In such functions,
`...` may only occur non-nested. That is, `y: &'a ...` is not allowed.

A C-variadic type is used to give an undefined number
of parameters to a given function (like `printf` in C).
The equivalent in Rust would be to use macros directly.
A C-variadic type is used to give an undefined number of parameters to a given
function (like `printf` in C). The equivalent in Rust would be to use macros
directly (like `println!` for example).