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% File src/library/methods/man/EmptyMethodsList-class.Rd
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% File src/library/methods/man/EmptyMethodsList-class.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 1995-2015 R Core Team
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% Copyright 1995-2015 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{EmptyMethodsList-class}
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\name{EmptyMethodsList-class}
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\docType{class}
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\docType{class}
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\title{S4 Classes Used Internally During Method Selection}
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\alias{EmptyMethodsList-class}
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\alias{EmptyMethodsList-class}
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\alias{optionalMethod-class}
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\alias{PossibleMethod-class}
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\alias{standardGeneric-class}
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\alias{standardGenericWithTrace-class}
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\alias{nonstandardGeneric-class}
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\alias{nonstandardGenericFunction-class}
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\alias{nonstandardGroupGenericFunction-class}
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\alias{OptionalFunction-class}
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\alias{derivedDefaultMethod-class}
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\title{Internal Class representing Empty Methods List }
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\alias{internalDispatchMethod-class}
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\description{
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\description{
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  Objects from class \code{"EmptyMethodsList"} are generated during
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  Objects from class \code{"EmptyMethodsList"} are generated during
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  method selection to indicate failed search (forcing backtracking).
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  method selection to indicate failed search (forcing backtracking).
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  Other classes described here are used internally in method dispatch.
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  Other classes described here are used internally in method dispatch.
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  All these are for internal use.}
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  All these are for internal use.}
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\usage{
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\usage{
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## class described below
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## class described below
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"EmptyMethodsList"
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"EmptyMethodsList" # deprecated, since \R 3.2.0; rather "defunct" from 4.5.0
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### Other, virtual classes used in method dispatch
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### Other, virtual classes used in method dispatch
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"standardGeneric"
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"standardGenericWithTrace"
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"nonstandardGeneric"
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"nonstandardGenericFunction"
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"nonstandardGroupGenericFunction"
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"OptionalFunction"
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"OptionalMethods"
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"optionalMethod"
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"PossibleMethod"
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"PossibleMethod"
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"derivedDefaultMethod"
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"internalDispatchMethod"
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}
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}
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\section{Slots}{
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\section{Extends / Slots}{
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  \code{"EmptyMethodsList"}:
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  \describe{
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  \describe{
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    \item{\code{argument}:}{Object of class \code{"name"} the argument
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    \item{\code{argument}:}{Object of class \code{"name"} the argument
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      names being selected on.}
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      names being selected on.}
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    \item{\code{sublist}:}{Object of class \code{"list"} (unused, and
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    \item{\code{sublist}:}{Object of class \code{"list"} (unused, and
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      perhaps to be dropped in a later version.) }
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      perhaps to be dropped in a later version.) }
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  }
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  }
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  \code{"optionalMethod"} and
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  \code{"PossibleMethod"} have \emph{no} slots and extend S4 class \code{"\linkS4class{function}"}.
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}
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}
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\section{Methods}{
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\section{Methods}{
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  No methods defined with class \code{"EmptyMethodsList"} in the
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  No methods defined with class \code{"EmptyMethodsList"} in the signature.
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  signature.
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}
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}
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\seealso{
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\seealso{
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  Function \code{\link{MethodsListSelect}} (deprecated since \R version
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  Function \code{\link{MethodsListSelect}} (deprecated since \R version
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  3.2.0) uses the objects;
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  3.2.0) uses the objects;
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  class \code{\linkS4class{MethodsList}} is formally defunct since \R 3.2.0.
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  class \code{\linkS4class{MethodsList}} is formally defunct since \R 3.2.0.