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% File src/library/base/man/Foreign.Rd
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% File src/library/base/man/Foreign.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 1995-2013 R Core Team
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% Copyright 1995-2018 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{CallExternal}
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\name{CallExternal}
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\alias{.Call}
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\alias{.Call}
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\alias{.External}
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\alias{.External}
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\details{
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\details{
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  The functions are used to call compiled code which makes use of
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  The functions are used to call compiled code which makes use of
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  internal \R objects, passing the arguments to the code as a sequence
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  internal \R objects, passing the arguments to the code as a sequence
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  of \R objects.  They assume C calling conventions, so can usually
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  of \R objects.  They assume C calling conventions, so can usually
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  also be used of C++ code.
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  also be used for C++ code.
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  For details about how to write code to use with these functions see
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  For details about how to write code to use with these functions see
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  the chapter on \sQuote{System and foreign language interfaces} in
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  the chapter on \sQuote{System and foreign language interfaces} in
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  the \sQuote{Writing \R Extensions} manual.  They differ in the way the
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  the \sQuote{Writing \R Extensions} manual.  They differ in the way the
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  arguments are passed to the C code:  \code{.External} allows for a
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  arguments are passed to the C code:  \code{.External} allows for a
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  variable number of arguments.
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  variable or unlimited number of arguments.
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  These functions are \link{primitive}, and \code{.NAME} is always
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  These functions are \link{primitive}, and \code{.NAME} is always
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  matched to the first argument supplied (which should not be named).
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  matched to the first argument supplied (which should not be named).
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  For clarity, avoid using names in the arguments passed to \code{\dots}
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  For clarity, avoid using names in the arguments passed to \code{\dots}
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  that match or partially match \code{.NAME}.
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  that match or partially match \code{.NAME}.