All functions
any_is_substring_of	Whether or not any substring of a string is any of a set of strings.
apply_pattern	Apply a pattern filter to a character vector.
check_if_parser_and_preprocessor_are_identical	If the parser and preprocessor for a path is the same, the user has probably made a mistake.
complete_extension	Complete the extension of a file (.r or .R).
dependency_tracker	Track the dependencies of a resource.
director_exists	Determine whether a resource exists relative to a director object.
director_filename	Convert a resource to a filename.
director_find	Find resources within a director project.
director	Management and Tracking of Files in R Projects.
drop_idempotence	Convert an idempotent resource name to a non-idempotent resource name.
duplicate	Duplicate a function object.
enforce_type	Enforce parameter types (logical, character, etc.).
extensionless_exists	Determine whether an R file exists regardless of case of extension.
get_helpers	Get all helper files associated with an idempotent resource directory.
%<<%	Append to a list or environment, overwriting if necessary.
has_preprocessor	Whether there exists a preprocessor for a resource.
initialize	Initialize a director object.
is.director	Whether or not an object is a director.
is.idempotent_directory	Whether or not a directory is an idempotent resource.
modification_tracker	Detect modifications to a resource.
parser	Apply the parser to a resource.
preprocessor	Apply the preprocessor to a resource.
register_parser	Register a resource parser.
register_preprocessor	Register a resource preprocessor
registry	A persistent on-disk cache of R objects associated with a directory.
resource_name	Convert a filename to a resource name.
caching_layer	Cache a resource's parsed value.
resource	Fetch a resource relative to a director object.
search_pattern	Define a search pattern for use with the find method on a director.
simple_cache	A simple caching structure.
sized_queue	Queue with size limit.
strip_r_extension	Strip R extension.
strip_root	Strip a root file path from an absolute filename.
tower	Create a tower of functions.
virtual_check	Mark a resource as virtual.