environment 成员列表

成员的完整列表，这些成员属于 environment,包括所有继承而来的类成员

add_to_path(const string &path, int position=1)	environment	static
all_envs()	environment	static
current_directory()	environment	static
current_user()	environment	static
delimiter	environment	static
exists(const string &name)	environment	static
get(const string &name)	environment	static
home_directory()	environment	static
path_list()	environment	static
set(const string &name, const string &value, bool overwrite=true)	environment	static
temp_directory()	environment	static
unset(const string &name)	environment	static