execute an expression vs a function

[schloerke]

With the rise of rlang, does it make sense to add quosure evaluation functionality?

Ex:

safe <- function(expr, ...) {
  expr <- rlang::enquo(expr)
  callr::r(function(e) rlang::eval_tidy(e), list(e = expr), ...)
}

# Direct usage
safe(cat("1", file = "test.txt"))

# Programmatic usage
exp <- quote(cat("2", file = "test.txt"))
safe(!!exp)

x <- "3"
safe(cat(!!x, file = "test.txt"))

[schloerke]

Talked with Gabor. Keeping this function out of callr for the time being.