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# 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
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
`recreate` <- function(x, snames = NULL) {
if (is.null(x) | is.logical(x) | is.character(x)) return(x)
withinobj <- function(x) {
x <- gsub("\"|[[:space:]]", "", x)
for (i in seq(length(x))) {
if (!grepl("<=|<-|->|=>", x[i])) {
x[i] <- gsub(">", "->", gsub("<", "<-", x[i]))
}
arrows <- c("<=", "<-", "=>", "->")
for (j in seq(length(arrows))) {
xs <- unlist(strsplit(x, split = arrows[j]))
if (length(xs) == 2) {
if (all(grepl("\\*|\\+", xs))) {
stopError("The outcome should be a single condition.")
}
if (j < 3) {
if (grepl("\\*|\\+", xs[2])) {
x[i] <- paste(xs[2], arrows[j + 2], xs[1], sep = "")
break
}
}
else {
if (grepl("\\*|\\+", xs[1])) {
x[i] <- paste(xs[2], arrows[j - 2], xs[1], sep = "")
break
}
}
}
}
}
return(x)
}
typev <- typel <- FALSE
callx <- identical(class(x), "call")
dx <- deparse(x)
if (callx) {
typev <- is.name(x[[1]]) & identical(as.character(x[[1]]), "c")
typel <- is.name(x[[1]]) & identical(as.character(x[[1]]), "list")
}
if (callx & (typev | typel)) {
result <- dxlist <- vector(mode = "list", length = max(1, length(x) - 1))
if (length(x) == 1) {
if (typev) return(NULL)
if (typel) return(list())
}
if (typev) {
if (length(snames) > 0) {
dx <- as.character(x)[-1]
if (all(is.element(dx, snames))) {
return(dx)
}
}
}
for (i in seq(length(result))) {
dxlist[[i]] <- dx <- deparse(x[[i + 1]])
result[[i]] <- tryCatch(eval(x[[i + 1]], envir = parent.frame(n = 2)), error = function(e) {
withinobj(dx)
})
if (length(snames) > 0) {
if (all(is.element(dx, snames))) {
result[[i]] <- dx
}
}
}
classes <- unlist(lapply(result, class))
if (length(unique(classes)) > 1) {
for (i in seq(length(result))) {
if (identical(classes[i], "formula") | (identical(classes[i], "function") & typev)) {
result[[i]] <- withinobj(dxlist[[i]])
}
if (identical(classes[i], "logical") & typev & nchar(dxlist[[i]] == 1)) {
result[[i]] <- withinobj(dxlist[[i]])
}
if (identical(classes[i], "list")) {
if (is.element("function", unlist(lapply(result[[i]], class)))) {
result[[i]] <- dxlist[[i]]
}
}
}
}
if (typev) {
return(unlist(result))
}
else if (typel) {
names(result) <- names(x[-1])
return(result)
}
}
if (length(snames) > 0 & all(!grepl("[[:punct:]]", notilde(dx)))) {
if (all(is.element(notilde(dx), snames))) {
return(dx)
}
}
if (identical(class(x), "<-")) {
return(withinobj(dx))
}
x <- tryCatch(eval(x, envir = parent.frame(n = 2)), error = function(e) withinobj(dx))
if (identical(class(x), "formula")) {
return(withinobj(dx))
}
return(x)
}
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