result (version 0.1.0)

bind: Binds a result with another result or function to return a result

Description

If the second object is a function, its return value will be wrapped in a result object of subclass success or failure depending on whether the function produces an error or warning. Bind is aliased with then_try.

If the second object is a function, its return value will be wrapped in a result object of subclass success or failure depending on whether the function produces an error or warning. then_try is aliased with bind.

Usage

bind(last_result, next_obj, ...)
then_try(last_result, next_obj, ...)

Value

result object of subclass success or failure

result object of subclass success or failure

Arguments

last_result

result object of subclass success or failure

next_obj

result monad or plain function to bind with

...

additional arguments to pass to next_obj

See Also

then_try

bind

Examples

times3 <- function(x, succeeds = TRUE) {
  if (succeeds) success(x * 3)
  else failure("func1 failed")
}

success(5) |> bind(times3) |> value()
success(5) |> bind(times3, succeeds = FALSE) |> is_failure()
failure("failed from the start") |> bind(times3) |> is_failure()
failure("failed from the start") |> bind(times3) |> value()
times3 <- function(x, succeeds = TRUE) {
  if (succeeds) success(x * 3)
  else failure("func1 failed")
}

success(5) |> then_try(times3) |> value()
success(5) |> then_try(times3, succeeds = FALSE) |> is_failure()
failure("failed from the start") |> then_try(times3) |> is_failure()
failure("failed from the start") |> then_try(times3) |> value()