first commit

Author: gvatn

.gitignore

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+/build/

AstNode.cpp

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+#include "AstNode.hpp"
+
+// Operator overloading on Expression
+Expression * Expression::operator+(Expression *expr) {
+	return new PlusExpr(this, expr);
+}
+Expression * Expression::operator-(Expression *expr) {
+	return new MinusExpr(this, expr);
+}
+Expression * Expression::operator*(Expression *expr) {
+	return new MultiplyExpr(this, expr);
+}
+Expression * Expression::operator/(Expression *expr) {
+	return new DivideExpr(this, expr);
+}