R/call_standardise.R

In Tplyr: A Traceability Focused Grammar of Clinical Data Summary

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#' rlang deprecated call_standardise, but this is necessary for
#' the `modify_nested_call()` function. The capability isn't
#' matched by the `call_match()` function.
#'
#' In modify nested call, this is used to restructure the function call
#' to have all named arguments. Since all the functions called inside
#' `call_standardise()` are exported and currently stable within rlang,
#' I'm porting the function here.
#'
#' @param call
#'
#' @return call
#' @noRd
tplyr_call_standardise <- function(call, env= rlang::caller_env()) {

  expr <- rlang::get_expr(call)

  if (!rlang::is_call(expr)) {
    stop("call_standardise error")
  }

  # The call name might be a literal, not necessarily a symbol
  env <- rlang::get_env(call, env)
  fn <- rlang::eval_bare(rlang::node_car(expr), env)

  if (rlang::is_primitive(fn)) {
    call
  } else {
    matched <- match.call(fn, expr)
    rlang::set_expr(call, matched)
  }

}