allow new lines and comments in lambda parameters (#307)

Author: dten

RustEnhanced.sublime-syntax

@@ -376,9 +376,10 @@ contexts:
     # scope as soon as we hit something that it not a
     # valid part so the whole rest of the document isn't
     # highlighted using the params scope
+    - include: comments
     - match: '(?=\()'
       push: group
-    - match: '(?=[};)\]\n])'
+    - match: '(?=[};)\]])'
       pop: true
     - match: '\|'
       scope: punctuation.definition.parameters.end.rust

syntax_test_rust.rs

@@ -1558,3 +1558,19 @@ type A3 = dyn<<dyn as dyn>::dyn>;
 //             ^^^ meta.generic storage.type.trait
 //                    ^^^ meta.generic -storage.type.trait
 //                          ^^^ meta.generic -storage.type.trait
+
+fn lambdas() {
+    let c = |foo,
+//          ^ meta.function.closure meta.function.parameters punctuation.definition.parameters.begin
+//           ^^^ meta.function.parameters variable.parameter
+             bar| {};
+//           ^^^ meta.function.parameters variable.parameter
+//              ^ meta.function.closure meta.function.parameters punctuation.definition.parameters.end
+    let c = |foo,  // weird, but should work
+//          ^ meta.function.closure meta.function.parameters punctuation.definition.parameters.begin
+//           ^^^ meta.function.parameters variable.parameter
+//                 ^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line
+             bar| {};
+//           ^^^ meta.function.parameters variable.parameter
+//              ^ meta.function.closure meta.function.parameters punctuation.definition.parameters.end
+}