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

[detail level 12]

Crds2cpp::Attribute	Attribute name and value
Crds2cpp::Environment	An R environment
Crds2cpp::EnvironmentVariable	Variable in an `Environment`
Crds2cpp::ExternalPointer	An R external pointer
Crds2cpp::LanguageArgument	Function argument in a `LanguageObject`
Crds2cpp::PairListElement	Element of a `PairList`
Crds2cpp::ParseRdaOptions	Options for `parse_rda()`
Crds2cpp::ParseRdsOptions	Options for `parse_rds()`
Crds2cpp::RdaFile	Contents of the parsed RDA file
Crds2cpp::RdaObject	R object saved in a `RdaFile`
Crds2cpp::RdsFile	Contents of the parsed RDS file
▼Crds2cpp::RObject	Virtual class for all unserialized R objects
Crds2cpp::AtomicVector< ElementType, stype >	Vector of some atomic type
Crds2cpp::BuiltInFunction	Built-in function
Crds2cpp::EnvironmentIndex	Reference to an environment
Crds2cpp::ExpressionVector	Expression vector
Crds2cpp::ExternalPointerIndex	Reference to an external pointer
Crds2cpp::GenericVector	Generic vector, i.e., an ordinary R list
Crds2cpp::LanguageObject	Language object, i.e., a function call
Crds2cpp::Null	R's `NULL` value
Crds2cpp::PairList	Pairlist, i.e., a linked list
Crds2cpp::S4Object	S4 object
Crds2cpp::StringVector	String vector
Crds2cpp::SymbolIndex	Reference to a language symbol
Crds2cpp::String	Single string in a `StringVector`
Crds2cpp::Symbol	An R symbol
Crds2cpp::Version	Major-minor-patch version number, usually of R itself
Crds2cpp::WriteRdaOptions	Options for `write_rda()`
Crds2cpp::WriteRdsOptions	Options for `write_rds()`