Railway (Railway v1.1.0)
View SourceRailway pipe operator.
Summary
Functions
The ~>> operator introduces the value of an {:ok, value} tuple on the left-hand side as the first argument to the function call on the right-hand side.
Functions
The ~>> operator introduces the value of an {:ok, value} tuple on the left-hand side as the first argument to the function call on the right-hand side.
If the tuple on the left-hand side is anything different from {:ok, value} like {:error, reason} the ~>> operator will just return the left-hand side and not execute the function call on the right.
If the expression on the left-hand side is not a tuple, the ~>> operator will behave just like |> does.
Examples
iex> use Railway
iex> {:ok, "some string"} ~>> String.upcase()
"SOME STRING"
iex> use Railway
iex> {:error, "some string"} ~>> String.upcase()
{:error, "some string"}