| method.skeleton {methods} | R Documentation |
This function writes a source file containing a call to
setMethod to define a method for the generic function
and signature supplied. By default the method definition is in line
in the call, but can be made an external (previously assigned) function.
method.skeleton(generic, signature, file, external = FALSE, where)
generic |
the character string name of the generic function, or
the generic function itself. In the first case, the function
need not currently be a generic, as it would not for the
resulting call to |
signature |
the method signature, as it would be given to |
file |
a character string name for the output file, or a
writable connection. By default the generic function name and
the classes in the signature are concatenated, with separating
underscore characters. The file name should normally end in |
To write multiple method skeletons to one file, open the file
connection first and then pass it to method.skeleton() in
multiple calls.
external |
flag to control whether the function definition for
the method should be a separate external object assigned in the
source file, or included in line in the call to
|
where |
The environment in which to look for the function; by default,
the top-level environment of the call to |
The file argument, invisibly, but the function is used for its side effect.
setClass("track", slots = c(x ="numeric", y="numeric"))
method.skeleton("show", "track") ## writes show_track.R
method.skeleton("Ops", c("track", "track")) ## writes "Ops_track_track.R"
## write multiple method skeletons to one file
con <- file("./Math_track.R", "w")
method.skeleton("Math", "track", con)
method.skeleton("exp", "track", con)
method.skeleton("log", "track", con)
close(con)