## = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
## This is a self-contained R script generated from an RSP document.
## It may be evaluated using source() as is.
## = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

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## Local RSP utility functions
## - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
## RSP metadata function
.rmeta <- list(
)

rmeta <- function(...) {
  args <- list(...)
  if (length(args) == 0) return(.rmeta)
  names <- names(args)
  if (length(names) > 0) {
    for (name in names) .rmeta[[name]] <<- args[[name]]
  } else {
    names <- unlist(args, use.names=FALSE)
    if (length(names) == 1) .rmeta[[names]] else .rmeta[names]
  }
}

## Look up 'base' function once (faster)
if (getRversion() < "2.15.0") {
  .base_paste <- base::paste
  .base_paste0 <- function(...) .base_paste(..., sep="")
} else {
  .base_paste0 <- base::paste0
}
.base_cat <- base::cat

## RSP output function
.rout <- function(x) .base_cat(.base_paste0(x))

## RSP output function for inline RSP constructs
.rout0 <- function(x) .base_cat(rpaste(x))

## The output of inline RSP constructs is controlled by
## generic function rpaste().
rpaste <- function(...) UseMethod("rpaste")

setInlineRsp <- function(class, fun, envir=parent.frame()) {
  name <- sprintf("rpaste.%s", class)
  assign(name, fun, envir=envir)
  ## FIXME: How to register an S3 method at run-time? /HB 2018-04-06
  ## registerS3method("rpaste", class = class, method = name, envir = envir)
}

## The default is to coerce to character and collapse without
## a separator.  It is possible to override the default in an
## RSP code expression.
setInlineRsp("default", function(x, ...) .base_paste0(x, collapse=""))

## - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
## RSP source code script [BEGIN]
## - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
.rout("Line #1\nLine #2\n")
a <- 2
b <- 3
.rout("Line #3\n")
## - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
## RSP source code script [END]
## - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -