R/inside.R

In admisc: Adrian Dusa's Miscellaneous

# Copyright (c) 2019 - 2023, Adrian Dusa
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, in whole or in part, are permitted provided that the
# following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * The names of its contributors may NOT be used to endorse or promote products
#       derived from this software without specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL ADRIAN DUSA BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

`inside` <- function(data, expr, ...) {
    UseMethod("inside")
}
`inside.data.frame` <- function(data, expr, ...) {
    dataname <- deparse(substitute(data))
    parent <- parent.frame()
    e <- evalq(environment(), data, parent)
    eval(substitute(expr), e)
    l <- as.list(e, all.names = TRUE)
    l <- l[!vapply(l, is.null, NA, USE.NAMES = FALSE)]
    nl <- names(l)
    del <- setdiff(names(data), nl)
    data[nl] <- l
    data[del] <- NULL
    parent[[dataname]] <- data
}
`inside.list` <- function(data, expr, keepAttrs = TRUE, ...) {
    parent <- parent.frame()
    dataname <- deparse(substitute(data))
    e <- evalq(environment(), data, parent)
    eval(substitute(expr), e)
    if (keepAttrs) { 
        l <- as.list(e, all.names=TRUE)
        nl <- names(l)
        del <- setdiff(names(data), nl) 
        data[nl] <- l
        data[del] <- NULL
        parent[[dataname]] <- data
    } else { 
	    parent[[dataname]] <- as.list(e, all.names=TRUE)
    }
}