/*
 *  Created on: Nov 28, 2017
 *      Author: naopross
 */

#ifndef SRC_DIAGRAM_SCOPE_HPP_
#define SRC_DIAGRAM_SCOPE_HPP_

#include "Statement.hpp"

namespace samb {

/* The Scope is a forward-iterable object that contains statements.
 * A scope is also a valid type of statement.
 *
 * The Scope object is used inside other complex types of statements such as
 * BranchStatement or a IteratorStatement, to hold the statements within their
 * scope.
 */
class Scope : public Statement {
public:
	class iterator {
	public:
		iterator(pointer statement);
		~iterator();

		iterator& operator++();
		iterator& operator++(int);

		Statement& operator*() const;
		Statement::pointer operator->() const;

	private:
		Statement::pointer m_current;
	};

	Scope(std::string label);
	Scope(std::string label, Statement::pointer first);
	~Scope();

	iterator insert_after(iterator it, Statement::pointer statement);
	iterator erase_after(iterator it);

	/* accessors */
	std::size_t size() const { return m_size; }

	/* iterator */
	iterator begin() { return iterator(m_head); }
	iterator end() { return iterator(m_tail); }

private:
	Statement::pointer m_head;
	Statement::pointer m_tail;
	std::size_t m_size = 0;
};

} /* namespace samb */

#endif /* SRC_DIAGRAM_SCOPE_HPP_ */