Merge #1161

1161: Add mbe 'item' matcher r=matklad a=edwin0cheng

Add `item` matcher in `ra_mbe` , and added corresponding `item()` parser in `ra_syntax`. 
This PR also help PR #1148 for `Items` parsing.

And hopefully fix #1149 ?!




Co-authored-by: Edwin Cheng <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/crates/ra_mbe/src/tt_cursor.rs b/crates/ra_mbe/src/tt_cursor.rs
index adfe5520d..484437b0e 100644
--- a/crates/ra_mbe/src/tt_cursor.rs
+++ b/crates/ra_mbe/src/tt_cursor.rs
@@ -104,6 +104,11 @@ impl<'a> TtCursor<'a> {
         parser.parse_stmt()
     }
 
+    pub(crate) fn eat_item(&mut self) -> Option<tt::TokenTree> {
+        let parser = Parser::new(&mut self.pos, self.subtree);
+        parser.parse_item()
+    }
+
     pub(crate) fn expect_char(&mut self, char: char) -> Result<(), ParseError> {
         if self.at_char(char) {
             self.bump();