Methods for creating and testing for tokens_xptr objects, which are
tokens objects containing pointers to memory locations that can be passed
by reference for efficient processing in tokens_*() functions that modify
them, or for constructing a document-feature matrix without requiring a deep
copy to be passed to dfm().
is.tokens_xptr() tests whether an object is of class
tokens_xtpr.
as.tokens_xptr() coerces a tokens object to an external
pointer-based tokens object, or returns a deep copy of a tokens_xtpr when
x is already a tokens_xtpr object.
is.tokens_xptr(x)as.tokens_xptr(x)
# S3 method for tokens
as.tokens_xptr(x)
# S3 method for tokens_xptr
as.tokens_xptr(x)
is.tokens_xptr() returns TRUE if the object is a external
pointer-based tokens object, FALSE otherwise.
as.tokens_xptr() returns a (deep copy of a) tokens_xtpr class
object.
a tokens object to convert or a tokens_xptr class object to deep
copy.