Skip to content

feat(lean): Raise error when function parameters contain patterns #1792

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
abentkamp merged 1 commit into from
Dec 2, 2025
Merged

feat(lean): Raise error when function parameters contain patterns #1792

Show file tree
Hide file tree
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
1 change: 1 addition & 0 deletions CHANGELOG.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ Changes to the Lean backend:
- Add support for default methods of traits (#1777)
- Add support for pattern matching on constant literals (#1789)
- Add support for binding subpatterns in match constructs (#1790)
- Add error when using patterns in function parameters (#1792)

Miscellaneous:
- Reserve extraction folder for auto-generated files in Lean examples (#1754)
Expand Down
9 changes: 8 additions & 1 deletion rust-engine/src/backends/lean.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -850,7 +850,14 @@ set_option linter.unusedVariables false
}

fn param(&self, param: &Param) -> DocBuilder<A> {
self.pat_typed(&param.pat)
if matches!(
*param.pat.kind,
PatKind::Wild | PatKind::Ascription { .. } | PatKind::Binding { sub_pat: None, .. }
) {
self.pat_typed(&param.pat)
} else {
emit_error!(issue 1791, "Function parameters must not contain patterns")
}
}

fn item(&self, Item { ident, kind, meta }: &Item) -> DocBuilder<A> {
Expand Down
Loading