Implements indexing with period identifier style (`foo.bar`)

src/Parser/ParsedExpressions/ParsedExpression.hpp

@@ -25,6 +25,7 @@ enum class ParsedExpressionKind{
     Parenthesized,
     FunctionCall,
     Indexer,
+    PeriodIndexer,
     NumericalTable,
     Table,
 };
@@ -287,6 +288,34 @@ public:
     }
 };
 
+class PeriodIndexExpression : public ParsedExpression{
+    const ParsedExpression* _indexerExpression;
+    const HashedString _index;
+public:
+    PeriodIndexExpression(ParsedExpression* indexer, HashedString index, unsigned int start, unsigned int length)
+            :ParsedExpression(start, length),
+             _indexerExpression(indexer), _index(index)
+    {
+    }
+
+    ~PeriodIndexExpression() final{
+        delete _indexerExpression;
+    }
+
+    const ParsedExpressionKind GetKind() const final{
+        return ParsedExpressionKind::PeriodIndexer;
+    }
+
+    const ParsedExpression* GetIndexer() const{
+        return _indexerExpression;
+    }
+
+    const HashedString& GetIndex() const{
+        return _index;
+    }
+};
+
+
 class ParsedNumericalTableExpression : public ParsedExpression{
     vector<const ParsedExpression*> _expressions;
 public: