CapturePipe
CapturePipe exposes an extended pipe-operator that allows the usage of bare function captures.
This is useful to insert the pipe's results into a datastructure such as a tuple.
What this macro does, is if it encounters a &
capture,
it wraps the whole operand in (...).()
which is the
anonymous-function-call syntax that Elixir's normal pipe accepts,
that (argubably) is less easy on the eyes.
For instance, 10 |> &{:ok, &1}
is turned into 10 |> (&{:ok, &1}).()
Examples
Still works as normal:
iex> [1,2,3] |> Enum.map(fn x -> x + 1 end)
[2,3,4]
Insert the result of an operation into a tuple
iex> 42 |> &{:ok, &1}
{:ok, 42}
It also works multiple times in a row.
iex> 20 |> &{:ok, &1} |> &[&1, 2, 3]
[{:ok, 20}, 2, 3]
Even if the pipes are nested deeply and interspersed with 'normal' pipe calls:
iex> (10
iex> |> &Kernel.div(20, &1)
iex> |> Kernel.-()
iex> |> to_string()
iex> |> &"The answer is: \#{&1}!"
iex> |> String.upcase()
iex> |> &{:ok, &1}
iex> )
{:ok, "THE ANSWER IS: -2!"}
Installation
Capturepipe can be installed
by adding capture_pipe
to your list of dependencies in mix.exs
:
def deps do
[
{:capture_pipe, "~> 0.1.0"}
]
end
Documentation can be found at https://hexdocs.pm/capture_pipe.