adding ExpressionStatement

src/AST/ExpressionStatement.cpp

@@ -0,0 +1,19 @@
+#include "AST/ExpressionStatement.h"
+#include "AST/ASTVisitor.h"
+
+ExpressionStatement::ExpressionStatement(Expression *expr) : expr_(expr)
+{
+	//
+}
+
+ExpressionStatement::~ExpressionStatement() {
+
+}
+
+void ExpressionStatement::accept(ASTVisitor *visitor) {
+	visitor->visit(this);
+}
+
+Expression* ExpressionStatement::getExpr() {
+	return expr_;
+}