我有以下代码：
boost::system::error_code errcode; return (boost::filesystem::create_directories(widePath,errcode));
当出现问题时,我认为errcode会指出错误的性质.但是,我发现当我知道有问题出现时,errcode保持0,这是没有帮助的.
boost::system::error_code errcode;
boost::filesystem::create_directories(widePath,errcode);
if (errcode == 0)
return true;
else
{
std::cout << errcode;
return false;
}
解决方法
只需访问：
http://www.boost.org/doc/libs/1_55_0/libs/system/doc/reference.html#Header-error_code
enum errc_t {
success = 0,address_family_not_supported,//EAFNOSUPPORT
address_in_use,//EADDRINUSE
address_not_available,//EADDRNOTAVAIL
already_connected,//EISCONN
argument_list_too_long,//E2BIG
argument_out_of_domain,//EDOM
bad_address,//EFAULT
bad_file_descriptor,//EBADF
bad_message,//EBADMSG
broken_pipe,//EPIPE
connection_aborted,//ECONNABORTED
connection_already_in_progress,//EALREADY
connection_refused,//ECONNREFUSED
connection_reset,//ECONNRESET
cross_device_link,//EXDEV
destination_address_required,//EDESTADDRREQ
device_or_resource_busy,//EBUSY
directory_not_empty,//ENOTEMPTY
executable_format_error,//ENOEXEC
file_exists,//EEXIST
file_too_large,//EFBIG
filename_too_long,//ENAMETOOLONG
function_not_supported,//ENOSYS
host_unreachable,//EHOSTUNREACH
identifier_removed,//EIDRM
illegal_byte_sequence,//EILSEQ
inappropriate_io_control_operation,//ENOTTY
interrupted,//EINTR
invalid_argument,//EINVAL
invalid_seek,//ESPIPE
io_error,//EIO
is_a_directory,//EISDIR
message_size,//EMSGSIZE
network_down,//ENETDOWN
network_reset,//ENETRESET
network_unreachable,//ENETUNREACH
no_buffer_space,//ENOBUFS
no_child_process,//ECHILD
no_link,//ENOLINK
no_lock_available,//ENOLCK
no_message_available,//ENODATA
no_message,//ENOMSG
no_protocol_option,//ENOPROTOOPT
no_space_on_device,//ENOSPC
no_stream_resources,//ENOSR
no_such_device_or_address,//ENXIO
no_such_device,//ENODEV
no_such_file_or_directory,//ENOENT
no_such_process,//ESRCH
not_a_directory,//ENOTDIR
not_a_socket,//ENOTSOCK
not_a_stream,//ENOSTR
not_connected,//ENOTCONN
not_enough_memory,//ENOMEM
not_supported,//ENOTSUP
operation_canceled,//ECANCELED
operation_in_progress,//EINPROGRESS
operation_not_permitted,//EPERM
operation_not_supported,//EOPNOTSUPP
operation_would_block,//EWOULDBLOCK
owner_dead,//EOWNERDEAD
permission_denied,//EACCES
protocol_error,//EPROTO
protocol_not_supported,//EPROTONOSUPPORT
read_only_file_system,//EROFS
resource_deadlock_would_occur,//EDEADLK
resource_unavailable_try_again,//EAGAIN
result_out_of_range,//ERANGE
state_not_recoverable,//ENOTRECOVERABLE
stream_timeout,//ETIME
text_file_busy,//ETXTBSY
timed_out,//ETIMEDOUT
too_many_files_open_in_system,//ENFILE
too_many_files_open,//EMFILE
too_many_links,//EMLINK
too_many_synbolic_link_levels,//ELOOP
value_too_large,//EOVERFLOW
wrong_protocol_type //EPROTOTYPE
};
此外：
switch( errcode.value() ) {
case boost::system::errc::success: {
// fine
}
break;
case boost::system::errc::operation_canceled: {
// Timer cancelled
}
break;
default: {
// Assert unexpected case
}
break;
}
