From 2970a9240f7a2451c9cd5f038a6637597ea2416c Mon Sep 17 00:00:00 2001
From: Bernard Duggan <bernardd@users.noreply.github.com>
Date: Mon, 26 Oct 2020 14:07:37 +1100
Subject: [PATCH] Loosen type for adapter key (#52)

---
 lib/confex.ex         | 16 ++++++++--------
 lib/confex/adapter.ex |  4 ++--
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/lib/confex.ex b/lib/confex.ex
index 0ec1e4a..7c887a9 100644
--- a/lib/confex.ex
+++ b/lib/confex.ex
@@ -8,10 +8,10 @@ defmodule Confex do
   by Confex configuration type. Common structure:
 
     ```elixir
-    @type fetch_statement :: {adapter :: atom() | module(), value_type :: value_type, key :: String.t, default :: any()}
-                           | {value_type :: value_type, key :: String.t}
-                           | {key :: String.t, default :: any()}
-                           | {key :: String.t}
+    @type fetch_statement :: {adapter :: atom() | module(), value_type :: value_type, key :: any(), default :: any()}
+                           | {value_type :: value_type, key :: any()}
+                           | {key :: any(), default :: any()}
+                           | {key :: any()}
     ```
 
   If `value_type` is set, Confex will automatically cast its value. Otherwise, default type of `:string` is used.
@@ -63,10 +63,10 @@ defmodule Confex do
   @typep value :: Application.value()
 
   @type configuration_tuple ::
-          {value_type :: Confex.Type.t(), key :: String.t(), default :: any()}
-          | {value_type :: Confex.Type.t(), key :: String.t()}
-          | {key :: String.t(), default :: any()}
-          | {key :: String.t()}
+          {value_type :: Confex.Type.t(), key :: any(), default :: any()}
+          | {value_type :: Confex.Type.t(), key :: any()}
+          | {key :: any(), default :: any()}
+          | {key :: any()}
 
   @doc """
   Returns the value for key in app’s environment in a tuple.
diff --git a/lib/confex/adapter.ex b/lib/confex/adapter.ex
index c460f1b..b2cb608 100644
--- a/lib/confex/adapter.ex
+++ b/lib/confex/adapter.ex
@@ -9,13 +9,13 @@ defmodule Confex.Adapter do
     * `:system_file` - read file path from system environment and \
     read configuration from this file (`Confex.Adapters.FileFromSystemEnvironment`).
 
-  To simplify configuration syntax, Confex allows to have an alias for adapter names.
+  To simplify configuration syntax, Confex allows an alias for adapter names.
   """
 
   @doc """
   Fetch raw configuration value.
   """
-  @callback fetch_value(key :: String.t()) :: {:ok, String.t()} | :error
+  @callback fetch_value(key :: any()) :: {:ok, String.t()} | :error
 
   @doc false
   # Resolve adapter with shorthand for built-in's.