Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Make Algae.Maybe.new(nil) return a Nothing #27

Merged
merged 2 commits into from
Jul 4, 2018
Merged

Make Algae.Maybe.new(nil) return a Nothing #27

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
453d351
Allow Algae.Maybe.new to return a Nothing based on option
icidasset Jun 13, 2018
e033535
Add Maybe.from_nillable
icidasset Jun 27, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
35 changes: 33 additions & 2 deletions lib/algae/maybe.ex
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -54,9 +54,40 @@ defmodule Algae.Maybe do
iex> new(9)
%Algae.Maybe.Just{just: 9}

iex> new(nil)
%Algae.Maybe.Just{just: nil}

iex> new(nil, nothing: nil)
%Algae.Maybe.Nothing{}

iex> new(9, nothing: 9)
%Algae.Maybe.Nothing{}

iex> new(9, nothing: 1)
%Algae.Maybe.Just{just: 9}

"""
@spec new(any(), [nothing: any()]) :: Just.t() | Nothing.t()
def new(nothing_value, [nothing: nothing_value]), do: Nothing.new()
def new(value, _), do: Just.new(value)

@spec new(any()) :: Just.t()
def new(value), do: Just.new(value)

@doc """
Alias for `new(value, nothing: nil)`.

## Examples

iex> from_nillable(9)
%Algae.Maybe.Just{just: 9}

iex> from_nillable(nil)
%Algae.Maybe.Nothing{}

"""
@spec new(any) :: Just.t()
defdelegate new(value), to: Just, as: :new
@spec from_nillable(any()) :: Just.t()
def from_nillable(value), do: new(value, nothing: nil)

@doc """
Extract a value from a `Maybe`, falling back to a set value in the `Nothing` case.
Expand Down