Support let...else

2021-10-07 17:05:50 +02:00
parent 4675410f07
commit f8acae7895
13 changed files with 162 additions and 8 deletions
--- a/crates/parser/src/grammar/expressions.rs
+++ b/crates/parser/src/grammar/expressions.rs
@@ -102,6 +102,16 @@ pub(super) fn stmt(p: &mut Parser, with_semi: StmtWithSemi, prefer_expr: bool) {
            expressions::expr(p);
        }

+        if p.at(T![else]) {
+            // test let_else
+            // fn f() { let Some(x) = opt else { return }; }
+
+            let m = p.start();
+            p.bump(T![else]);
+            block_expr(p);
+            m.complete(p, LET_ELSE);
+        }
+
        match with_semi {
            StmtWithSemi::No => (),
            StmtWithSemi::Optional => {