3 files changed, 28 insertions, 1 deletions

diff --git a/crates/ra_parser/src/grammar/expressions/atom.rs b/crates/ra_parser/src/grammar/expressions/atom.rs
index 0d277a586..166dfc472 100644
--- a/crates/ra_parser/src/grammar/expressions/atom.rs
+++ b/crates/ra_parser/src/grammar/expressions/atom.rs
@@ -535,6 +535,22 @@ fn break_expr(p: &mut Parser, r: Restrictions) -> CompletedMarker {
 fn try_block_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
     assert!(p.at(T![try]));
     let m = m.unwrap_or_else(|| p.start());
+    // Special-case `try!` as macro.
+    // This is a hack until we do proper edition support
+    if p.nth_at(1, T![!]) {
+        // test try_macro_fallback
+        // fn foo() { try!(Ok(())); }
+        let path = p.start();
+        let path_segment = p.start();
+        let name_ref = p.start();
+        p.bump_remap(IDENT);
+        name_ref.complete(p, NAME_REF);
+        path_segment.complete(p, PATH_SEGMENT);
+        path.complete(p, PATH);
+        let _block_like = items::macro_call_after_excl(p);
+        return m.complete(p, MACRO_CALL);
+    }
+
     p.bump(T![try]);
     block(p);
     m.complete(p, TRY_EXPR)
diff --git a/crates/ra_parser/src/grammar/items.rs b/crates/ra_parser/src/grammar/items.rs
index 433ed6812..1503a8730 100644
--- a/crates/ra_parser/src/grammar/items.rs
+++ b/crates/ra_parser/src/grammar/items.rs
@@ -415,6 +415,17 @@ pub(super) fn macro_call_after_excl(p: &mut Parser) -> BlockLike {
     if p.at(IDENT) {
         name(p);
     }
+    // Special-case `macro_rules! try`.
+    // This is a hack until we do proper edition support
+
+    // test try_macro_rules
+    // macro_rules! try { () => {} }
+    if p.at(T![try]) {
+        let m = p.start();
+        p.bump_remap(IDENT);
+        m.complete(p, NAME);
+    }
+
     match p.current() {
         T!['{'] => {
             token_tree(p);
diff --git a/crates/ra_parser/src/grammar/items/use_item.rs b/crates/ra_parser/src/grammar/items/use_item.rs
index e3b991c8c..3a0c7a31a 100644
--- a/crates/ra_parser/src/grammar/items/use_item.rs
+++ b/crates/ra_parser/src/grammar/items/use_item.rs
@@ -47,7 +47,7 @@ fn use_tree(p: &mut Parser, top_level: bool) {
         // use {crate::path::from::root, or::path::from::crate_name}; // Rust 2018 (with a crate named `or`)
         // use {path::from::root}; // Rust 2015
         // use ::{some::arbritrary::path}; // Rust 2015
-        // use ::{{{crate::export}}}; // Nonsensical but perfectly legal nestnig
+        // use ::{{{root::export}}}; // Nonsensical but perfectly legal nesting
         T!['{'] => {
             use_tree_list(p);
         }