add clarifying comment

Andrin Meier · Andrin Meier · commit eedcb8429261 · 2016-05-30T21:30:58.000+02:00
diff --git a/Rubberduck.Parsing/Grammar/VBAParser.g4 b/Rubberduck.Parsing/Grammar/VBAParser.g4
@@ -520,6 +520,7 @@ visibility : PRIVATE | PUBLIC | FRIEND | GLOBAL;
 
 // 5.6 Expressions
 expression :
+    // Literal Expression has to come before lExpression, otherwise it'll be classified as simple name expression instead.
     literalExpression                                                                               # literalExpr
     | lExpression                                                                                   # lExpr
     | builtInType                                                                                   # builtInTypeExpr
