Skip to content

Change "must" to "may only" in macro future proofing rules. #25661

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
bors merged 1 commit into from
May 21, 2015
Merged

Change "must" to "may only" in macro future proofing rules. #25661

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
6 changes: 3 additions & 3 deletions src/doc/trpl/macros.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -476,9 +476,9 @@ which syntactic form it matches.

There are additional rules regarding the next token after a metavariable:

* `expr` variables must be followed by one of: `=> , ;`
* `ty` and `path` variables must be followed by one of: `=> , : = > as`
* `pat` variables must be followed by one of: `=> , =`
* `expr` variables may only be followed by one of: `=> , ;`
* `ty` and `path` variables may only be followed by one of: `=> , : = > as`
* `pat` variables may only be followed by one of: `=> , =`
* Other variables may be followed by any token.

These rules provide some flexibility for Rust’s syntax to evolve without
Expand Down