From 1d7735fbc6795c3ea5f02950b47413e0b35d6677 Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Sat, 6 Apr 2019 12:12:32 +0800
Subject: Add path test and empty eat_path handling

---
 crates/ra_mbe/src/lib.rs          | 22 ++++++++++++++++++++++
 crates/ra_mbe/src/mbe_expander.rs |  5 +++++
 crates/ra_mbe/src/tt_cursor.rs    |  4 ++++
 3 files changed, 31 insertions(+)

diff --git a/crates/ra_mbe/src/lib.rs b/crates/ra_mbe/src/lib.rs
index 4203929d4..a5b7fab52 100644
--- a/crates/ra_mbe/src/lib.rs
+++ b/crates/ra_mbe/src/lib.rs
@@ -379,4 +379,26 @@ SOURCE_FILE@[0; 40)
         // [let] [s] [=] ["rust1"] [;]
         assert_eq!(to_literal(&stm_tokens[15 + 3]).text, "\"rust1\"");
     }
+
+    /// The following tests are port from intellij-rust directly
+    /// https://github.com/intellij-rust/intellij-rust/blob/c4e9feee4ad46e7953b1948c112533360b6087bb/src/test/kotlin/org/rust/lang/core/macros/RsMacroExpansionTest.kt
+
+    #[test]
+    fn test_path() {
+        let rules = create_rules(
+            r#"
+        macro_rules! foo {
+            ($ i:path) => {
+                fn foo() { let a = $ i; }
+            }
+        }
+"#,
+        );
+        assert_expansion(&rules, "foo! { foo }", "fn foo () {let a = foo ;}");
+        assert_expansion(
+            &rules,
+            "foo! { bar::<u8>::baz::<u8> }",
+            "fn foo () {let a = bar :: < u8 > :: baz :: < u8 > ;}",
+        );
+    }
 }
diff --git a/crates/ra_mbe/src/mbe_expander.rs b/crates/ra_mbe/src/mbe_expander.rs
index 2dafd68f6..ce41d7225 100644
--- a/crates/ra_mbe/src/mbe_expander.rs
+++ b/crates/ra_mbe/src/mbe_expander.rs
@@ -139,6 +139,11 @@ fn match_lhs(pattern: &crate::Subtree, input: &mut TtCursor) -> Result<Bindings,
                                 Binding::Simple(tt::Leaf::from(ident).into()),
                             );
                         }
+                        "path" => {
+                            let path =
+                                input.eat_path().ok_or(ExpandError::UnexpectedToken)?.clone();
+                            res.inner.insert(text.clone(), Binding::Simple(path.into()));
+                        }
                         _ => return Err(ExpandError::UnexpectedToken),
                     }
                 }
diff --git a/crates/ra_mbe/src/tt_cursor.rs b/crates/ra_mbe/src/tt_cursor.rs
index 3128cb9ae..6f619621a 100644
--- a/crates/ra_mbe/src/tt_cursor.rs
+++ b/crates/ra_mbe/src/tt_cursor.rs
@@ -78,6 +78,10 @@ impl<'a> TtCursor<'a> {
         })
     }
 
+    pub(crate) fn eat_path(&mut self) -> Option<tt::Subtree> {        
+        None
+    }
+
     pub(crate) fn expect_char(&mut self, char: char) -> Result<(), ParseError> {
         if self.at_char(char) {
             self.bump();
-- 
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