Merge #4877

4877: Fix syntax highlighting of recursive macros r=matklad a=ltentrup

Add syntax highlighting for the BANG (`!`) token if the parent is `MACRO_CALL`.

Before:
<img width="514" alt="before" src="https://user-images.githubusercontent.com/201808/84595030-11f65c00-ae56-11ea-9bb2-b1abe2236990.png">

After:
<img width="516" alt="recursive-macro" src="https://user-images.githubusercontent.com/201808/84594981-d196de00-ae55-11ea-8636-f877d5d795ff.png">


Fixes #4694.

Co-authored-by: Leander Tentrup <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/crates/ra_ide/src/syntax_highlighting/tests.rs b/crates/ra_ide/src/syntax_highlighting/tests.rs
index 949bf59a0..070b24f45 100644
--- a/crates/ra_ide/src/syntax_highlighting/tests.rs
+++ b/crates/ra_ide/src/syntax_highlighting/tests.rs
@@ -43,6 +43,12 @@ def_fn! {
     }
 }
 
+macro_rules! noop {
+    ($expr:expr) => {
+        $expr
+    }
+}
+
 // comment
 fn main() {
     println!("Hello, {}!", 92);
@@ -61,6 +67,8 @@ fn main() {
         // Do nothing
     }
 
+    noop!(noop!(1));
+
     let mut x = 42;
     let y = &mut x;
     let z = &y;