This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 12]

Cgpiod::chip	Represents a GPIO chip
Cgpiod::chip_info	Represents an immutable snapshot of GPIO chip information
Cgpiod::edge_event	Immutable object containing data about a single edge event
Cgpiod::edge_event_buffer	Object into which edge events are read for better performance
Cgpiod_chip
Cgpiod_chip_info
Cgpiod_edge_event
Cgpiod_edge_event_buffer
Cgpiod_info_event
Cgpiod_line_config
Cgpiod_line_info
Cgpiod_line_request
Cgpiod_line_settings
Cgpiod_request_config
Cgpiod::info_event	Immutable object containing data about a single line info event
Cgpiod::line_config	Contains a set of line config options used in line requests and reconfiguration
Cgpiod::line_info	Contains an immutable snapshot of the line's state at the time when the object of this class was instantiated
Cgpiod::line_request	Stores the context of a set of requested GPIO lines
Cgpiod::line_settings	Stores GPIO line settings
Cstd::logic_error
Cgpiod::chip_closed	Exception thrown when an already closed chip is used
Cgpiod::request_released	Exception thrown when an already released line request is used
Cgpiod::line::offset	Wrapper around unsigned int for representing line offsets
Cgpiod::request_builder	Intermediate object storing the configuration for a line request
Cgpiod::request_config	Stores a set of options passed to the kernel when making a line request
Cstd::runtime_error
Cgpiod::bad_mapping	Exception thrown when the core C library returns an invalid value for any of the line_info properties
Cgpiod::timestamp	Stores the edge and info event timestamps as returned by the kernel and allows to convert them to std::chrono::time_point