diff options
Diffstat (limited to 'src/test/ui/generic-associated-types/issue-70303.rs')
-rw-r--r-- | src/test/ui/generic-associated-types/issue-70303.rs | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/issue-70303.rs b/src/test/ui/generic-associated-types/issue-70303.rs new file mode 100644 index 000000000..568996e1a --- /dev/null +++ b/src/test/ui/generic-associated-types/issue-70303.rs @@ -0,0 +1,59 @@ +// check-pass + +#![feature(generic_associated_types)] + +trait Document { + type Cursor<'a>: DocCursor<'a> where Self: 'a; + + fn cursor(&self) -> Self::Cursor<'_>; +} + +struct DocumentImpl {} + +impl Document for DocumentImpl { + type Cursor<'a> = DocCursorImpl<'a>; + + fn cursor(&self) -> Self::Cursor<'_> { + DocCursorImpl { + document: &self, + } + } +} + + +trait DocCursor<'a> {} + +struct DocCursorImpl<'a> { + document: &'a DocumentImpl, +} + +impl<'a> DocCursor<'a> for DocCursorImpl<'a> {} + +struct Lexer<'d, Cursor> +where + Cursor: DocCursor<'d>, +{ + cursor: Cursor, + _phantom: std::marker::PhantomData<&'d ()>, +} + + +impl<'d, Cursor> Lexer<'d, Cursor> +where + Cursor: DocCursor<'d>, +{ + pub fn from<Doc>(document: &'d Doc) -> Lexer<'d, Cursor> + where + Doc: Document<Cursor<'d> = Cursor>, + { + Lexer { + cursor: document.cursor(), + _phantom: std::marker::PhantomData, + } + } +} + +pub fn main() { + let doc = DocumentImpl {}; + let lexer: Lexer<'_, DocCursorImpl<'_>> = Lexer::from(&doc); +} |