Add support for diagnostics to parser

src/Parser/ParsedExpressions/ParsedExpression.hpp

@@ -7,6 +7,8 @@
 #include "../BinaryOperatorKind.hpp"
 
 enum class ParsedExpressionKind{
+    Bad,
+
     LiteralInteger,
     LiteralFloat,
     LiteralString,
@@ -40,6 +42,15 @@ public:
     }
 };
 
+class BadExpression : public ParsedExpression{
+public:
+    BadExpression(unsigned int position, unsigned int length) : ParsedExpression(position, length){}
+
+    ParsedExpressionKind GetKind() final{
+        return ParsedExpressionKind::Bad;
+    }
+};
+
 class LiteralIntegerExpression : public ParsedExpression{
     long _value;
 public: