Nothing
#' Read additional concept tables
#'
#' @param filename RDS-file name without extension to read from
#' @param ... passed to [subset]
#'
#' @return a data frame
util_get_concept_info <- function(filename, ...) {
if (exists(filename, .concept_chache, mode = "list")) {
dfr <- get(filename, .concept_chache, mode = "list")
} else {
f <- system.file(paste0(filename, ".rds"), package = "dataquieR")
if (0 != file.access(f, 4)) {
util_error("Cannot read file %s. Internal error.", dQuote(filename))
}
dfr <- readRDS(f)
assign(filename, dfr, .concept_chache)
}
cl <- sys.call()
cl[[1]] <- as.symbol("subset")
cl[[2]] <- NULL
cl$x <- dfr
r <- eval(cl,
envir = parent.frame(),
enclos = environment())
r
}
.concept_chache <- new.env(parent = emptyenv())
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