Use pattern_single instead of pattern in mbe pat

2020-12-20 17:13:40 +08:00
parent f3125555a8
commit f942d10e80
3 changed files with 14 additions and 2 deletions
--- a/crates/mbe/src/tests.rs
+++ b/crates/mbe/src/tests.rs
@@ -1003,6 +1003,18 @@ fn test_underscore() {
    .assert_expand_items(r#"foo! { => }"#, r#"0"#);
 }

+#[test]
+fn test_vertical_bar_with_pat() {
+    parse_macro(
+        r#"
+            macro_rules! foo {
+                 (| $pat:pat | ) => { 0 }
+            }
+    "#,
+    )
+    .assert_expand_items(r#"foo! { | x | }"#, r#"0"#);
+}
+
 #[test]
 fn test_lifetime() {
    parse_macro(