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set.ex
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set.ex
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defmodule Set do
@moduledoc ~S"""
Generic API for sets.
This module is deprecated, use the `MapSet` module instead.
"""
@moduledoc deprecated: "Use MapSet instead"
@type value :: any
@type values :: [value]
@type t :: map
# TODO: Remove by 2.0
message = "Use the MapSet module for working with sets"
defmacrop target(set) do
quote do
case unquote(set) do
%module{} -> module
set -> unsupported_set(set)
end
end
end
@deprecated message
def delete(set, value) do
target(set).delete(set, value)
end
@deprecated message
def difference(set1, set2) do
target1 = target(set1)
target2 = target(set2)
if target1 == target2 do
target1.difference(set1, set2)
else
Enumerable.reduce(set2, {:cont, set1}, fn v, acc ->
{:cont, target1.delete(acc, v)}
end)
|> elem(1)
end
end
@deprecated message
def disjoint?(set1, set2) do
target1 = target(set1)
target2 = target(set2)
if target1 == target2 do
target1.disjoint?(set1, set2)
else
Enumerable.reduce(set2, {:cont, true}, fn member, acc ->
case target1.member?(set1, member) do
false -> {:cont, acc}
_ -> {:halt, false}
end
end)
|> elem(1)
end
end
@deprecated message
def empty(set) do
target(set).empty(set)
end
@deprecated message
def equal?(set1, set2) do
target1 = target(set1)
target2 = target(set2)
cond do
target1 == target2 ->
target1.equal?(set1, set2)
target1.size(set1) == target2.size(set2) ->
do_subset?(target1, target2, set1, set2)
true ->
false
end
end
@deprecated message
def intersection(set1, set2) do
target1 = target(set1)
target2 = target(set2)
if target1 == target2 do
target1.intersection(set1, set2)
else
Enumerable.reduce(set1, {:cont, target1.new}, fn v, acc ->
{:cont, if(target2.member?(set2, v), do: target1.put(acc, v), else: acc)}
end)
|> elem(1)
end
end
@deprecated message
def member?(set, value) do
target(set).member?(set, value)
end
@deprecated message
def put(set, value) do
target(set).put(set, value)
end
@deprecated message
def size(set) do
target(set).size(set)
end
@deprecated message
def subset?(set1, set2) do
target1 = target(set1)
target2 = target(set2)
if target1 == target2 do
target1.subset?(set1, set2)
else
do_subset?(target1, target2, set1, set2)
end
end
@deprecated message
def to_list(set) do
target(set).to_list(set)
end
@deprecated message
def union(set1, set2) do
target1 = target(set1)
target2 = target(set2)
if target1 == target2 do
target1.union(set1, set2)
else
Enumerable.reduce(set2, {:cont, set1}, fn v, acc ->
{:cont, target1.put(acc, v)}
end)
|> elem(1)
end
end
defp do_subset?(_target1, target2, set1, set2) do
Enumerable.reduce(set1, {:cont, true}, fn member, acc ->
case target2.member?(set2, member) do
true -> {:cont, acc}
_ -> {:halt, false}
end
end)
|> elem(1)
end
defp unsupported_set(set) do
raise ArgumentError, "unsupported set: #{inspect(set)}"
end
end