Writes chain to an output stream or a file.

Write a sparse chain to an output stream or a file using the .osm file format.

Output a sparse chain (the chain can be reloaded using read_chain).

Friends
template<typename _CT , int _SF>
std::ostream &	write_chain (const Sparse_chain< _CT, _SF > &chain, std::ostream &out)
	Writes a sparse chain to a stream.
template<typename _CT , int _SF>
void	write_chain (const Sparse_chain< _CT, _SF > &chain, std::string filename)
	Writes a sparse chain to a file.
template<typename _CT , int _SF>
std::istream &	read_chain (Sparse_chain< _CT, _SF > &chain, std::istream &in)
	Reads a sparse chain from a stream.
template<typename _CT , int _SF>
void	read_chain (Sparse_chain< _CT, _SF > &chain, std::string filename)
	Reads a sparse chain from a file.