Is object a call?Source:
These functions are deprecated, please use
is_call() and its
An object to test. Formulas and quosures are treated literally.
An optional name that the call should match. It is passed to
sym()before matching. This argument is vectorised and you can supply a vector of names to match. In this case,
TRUEif at least one name matches.
An optional number of arguments that the call should match.
The namespace of the call. If
NULL, the namespace doesn't participate in the pattern-matching. If an empty string
xis a namespaced call,
FALSE. If any other string,
xis namespaced within
Can be a character vector of namespaces, in which case the call has to match at least one of them, otherwise