arg                     Capture lazy variables as quotations.
arg_env                 Get information about currently bound
                        arguments.
as.dots                 Convert items into quotations or dots.
as.lazy_dots            Compatibility conversions.
caller                  Find the caller of a given environment.
do                      Making function calls, with full control of
                        argument scope.
dots                    Dots objects: lists of quotations.
dots2env                Make or update an environment with bindings
                        from a dots list.
env2dots                Copy bindings from an environment into a dots
                        object, or vice versa.
forced                  Forcing and forcedness of arguments and
                        quotations.
format.dots             Formatting methods for dots and quotations.
function_               Explicitly create closures.
get_call                Get information about currently executing
                        calls.
get_dots                Set or get the contents of '...'.
locate                  Find the environment which defines a name.
missing_value           R's missing value.
quo                     Quotation objects.
unwrap                  Unwrap variable references.
