R/options.R

Defines functions options getOption

Documented in getOption options

#  File src/library/base/R/options.R
#  Part of the R package, https://www.R-project.org
#
#  Copyright (C) 1995-2015 The R Core Team
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  A copy of the GNU General Public License is available at
#  https://www.R-project.org/Licenses/

options <- function(...)
    .Internal(options(...))

getOption <- function(x, default = NULL)
{
    ## To avoid always performing the %in%,
    ## we use the original code if default is not specified.
    ## if(missing(default)) return(options(x)[[1L]])
    if(missing(default) || x %in% names(options()))
	.Internal(getOption(x))
    else
	default
}
robertzk/monadicbase documentation built on May 27, 2019, 10:35 a.m.