Expand reraise/2 without code injection similar to raise/1

Author: José Valim

lib/elixir/lib/kernel.ex

@@ -1743,26 +1743,7 @@ defmodule Kernel do
 
       message ->
         quote do
-          stacktrace = unquote(stacktrace)
-
-          case unquote(message) do
-            message when is_binary(message) ->
-              :erlang.raise(:error, RuntimeError.exception(message), stacktrace)
-
-            atom when is_atom(atom) ->
-              :erlang.raise(:error, atom.exception([]), stacktrace)
-
-            %_{__exception__: true} = other ->
-              :erlang.raise(:error, other, stacktrace)
-
-            other ->
-              message = <<
-                "reraise/2 expects a module name, string or exception",
-                "as the first argument, got: #{inspect(other)}"
-              >>
-
-              :erlang.error(ArgumentError.exception(message))
-          end
+          :erlang.raise(:error, Kernel.Utils.raise(unquote(message)), unquote(stacktrace))
         end
     end
   end

lib/elixir/lib/kernel/utils.ex

@@ -135,8 +135,8 @@ defmodule Kernel.Utils do
 
   def raise(other) do
     ArgumentError.exception(
-      "raise/1 expects a module name, string or exception as " <>
-        "the first argument, got: #{inspect(other)}"
+      "raise/1 and reraise/2 expect a module name, string or exception " <>
+        "as the first argument, got: #{inspect(other)}"
     )
   end