The R Project SVN R

\name{MethodSupport}
\alias{.conflicts.OK}
\alias{OldEvalSelectedMethod}
\alias{getMethodsForDispatch}
\alias{cacheMethod}
\alias{hasMethod}
\alias{resetGeneric}
\title{Additional (Support) Functions for Methods}
\usage{

getMethodsForDispatch(f)

cacheMethod(f, sig, def, args = names(sig))

hasMethod(f, signature=character())

resetGeneric(f)
}
\description{
  These are support routines for computations on formal methods.
}

\section{Summary of Functions}{
  
\describe{

\item{\code{hasMethod}:}{ 
  returns \code{TRUE} if \code{f} is the name of a generic function with an (explicit) method for
this signature.

  
  }
\item{\code{resetGeneric}:}{ 
  reset the currently defined methods for this generic by removing the
  corresponding definition from the methods metadata (to be remerged
  when the function is next called).  Returns \code{TRUE} or
  \code{FALSE} according to whether information for the function was
  found in the metadata.

  You \emph{must} call this function when you change relevant inheritance information during a
session, to guarantee that the new information is used if this generic has already been
called.
}

\item{\code{cacheMethod}:}{Store the definition for this function and
  signature in the method metadata for the function.  Used to store
  extensions of coerce methods found through inheritance.

  No persistent effect, since the method metadata is session-scope only.
}

\item{\code{getMethodsForDispatch}:}{Get the current methods list object
  representing the methods for function f, merged from the various
  libraries and with any additional caching information stored in the
  \code{allMethods} slot.

  If methods have not yet been merged, calling
  \code{getMethodsForDispatch} will cause the merge to take place.
  }
  
}
}
\keyword{internal}