# File src/library/methods/R/substituteDirect.R # Part of the R package, https://www.R-project.org # # Copyright (C) 1995-2014 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/ substituteDirect <- ## subsitute the for the variables named in the second argument the corresponding ## objects, substituting into `object'. ## ## This function differs from the ordinary `substitute' in that it treats its first argument ## in the standard S way, by evaluating it. In contrast, `substitute' does ## not evaluate its first argument. function(object, frame = parent.frame(), cleanFunction = TRUE) { value <- .Call(C_do_substitute_direct, object, frame) if(cleanFunction && is.function(value)) { ## unset any local environment environment(value) <- .GlobalEnv } value }