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/snapshots/highlighting.html b/crates/ra_ide/src/snapshots/highlighting.html
index 33548d43c..5c2ff6ab5 100644
--- a/crates/ra_ide/src/snapshots/highlighting.html
+++ b/crates/ra_ide/src/snapshots/highlighting.html
@@ -62,6 +62,12 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     }
 }
 
+<span class="macro">macro_rules!</span> <span class="macro declaration">noop</span> {
+    ($expr:expr) =&gt; {
+        $expr
+    }
+}
+
 <span class="comment">// comment</span>
 <span class="keyword">fn</span> <span class="function declaration">main</span>() {
     <span class="macro">println!</span>(<span class="string_literal">"Hello, {}!"</span>, <span class="numeric_literal">92</span>);
@@ -80,6 +86,8 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
         <span class="comment">// Do nothing</span>
     }
 
+    <span class="macro">noop!</span>(<span class="macro">noop</span><span class="macro">!</span>(<span class="numeric_literal">1</span>));
+
     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">x</span> = <span class="numeric_literal">42</span>;
     <span class="keyword">let</span> <span class="variable declaration mutable">y</span> = &<span class="keyword">mut</span> <span class="variable mutable">x</span>;
     <span class="keyword">let</span> <span class="variable declaration">z</span> = &<span class="variable mutable">y</span>;