# `Dialyxir.Warnings.UnmatchedReturn`
[🔗](https://github.com/jeremyjh/dialyxir/blob/1.4.8/lib/dialyxir/warnings/unmatched_return.ex#L1)

The invoked expression returns a union of types and the call does
not match on its return types using e.g. a case or wildcard.

## Example

    defmodule Example do
      require Integer

      def ok() do
        n = :rand.uniform(100)

        multiple_returns(n)

        :ok
      end

      defp multiple_returns(n) do
        if Integer.is_even(n) do
          :ok
        else
          {:error, "error"}
        end
      end
    end

  This would NOT result in a warning:

    defmodule Example do
      require Integer

      def ok() do
        n = :rand.uniform(100)

        multiple_returns(n)

        :ok
      end

      defp multiple_returns(n) do
        if Integer.is_even(n) do
          :ok
        else
          :error
        end
      end
    end

---

*Consult [api-reference.md](api-reference.md) for complete listing*