lib/machete/matchers/reference_matcher.ex
defmodule Machete.ReferenceMatcher do
@moduledoc """
Defines a matcher that matches reference values
"""
import Machete.Mismatch
defstruct []
@typedoc """
Describes an instance of this matcher
"""
@opaque t :: %__MODULE__{}
@typedoc """
Describes the arguments that can be passed to this matcher
"""
@type opts :: []
@doc """
Matches against reference values
Takes no arguments
Examples:
iex> assert make_ref() ~> reference()
true
iex> refute "a" ~> reference()
false
"""
@spec reference(opts()) :: t()
def reference(opts \\ []), do: struct!(__MODULE__, opts)
defimpl Machete.Matchable do
def mismatches(%@for{}, b) do
unless is_reference(b), do: mismatch("#{inspect(b)} is not a reference")
end
end
end