Added expression unary

src/Parser/Expression/ExpressionUnary.h

@@ -0,0 +1,23 @@
+#ifndef EXPRESSION_UNARY_H
+#define EXPRESSION_UNARY_H
+
+#include "Expression.h"
+
+enum class ExpressionUnaryOperation {
+    PLUS,
+    MINUS,
+    INVALID
+};
+
+class ExpressionUnary: public Expression {
+private:
+    ExpressionUnaryOperation operation;
+    shared_ptr<Expression> expression;
+
+public:
+    ExpressionUnary(shared_ptr<Token> token, shared_ptr<Expression> expression);
+    ExpressionUnaryOperation getOperation();
+    shared_ptr<Expression> getExpression();
+};
+
+#endif