From 552556357ea9833996b01b6265ba834babcd6569 Mon Sep 17 00:00:00 2001
From: DarkWiiPlayer <darkwiiplayer@hotmail.com>
Date: Sun, 25 Dec 2022 11:52:08 +0100
Subject: [PATCH] Add error pseudo-loader

---
 glass-dev-1.rockspec | 1 +
 glass/error.lua      | 3 +++
 readme.md            | 2 ++
 3 files changed, 6 insertions(+)
 create mode 100644 glass/error.lua

diff --git a/glass-dev-1.rockspec b/glass-dev-1.rockspec
index d613b9e..d0251f2 100644
--- a/glass-dev-1.rockspec
+++ b/glass-dev-1.rockspec
@@ -17,6 +17,7 @@ build = {
       ["glass.cosmo"] = "glass/cosmo.lua",
       ["glass.discount"] = "glass/discount.lua",
       ["glass.environment"] = "glass/environment.lua",
+      ["glass.error"] = "glass/error.lua",
       ["glass.json"] = "glass/json.lua",
       ["glass.lua"] = "glass/lua.lua",
       ["glass.moonhtml"] = "glass/moonhtml.lua",
diff --git a/glass/error.lua b/glass/error.lua
new file mode 100644
index 0000000..3834846
--- /dev/null
+++ b/glass/error.lua
@@ -0,0 +1,3 @@
+return function(name)
+	error("Could not load config "..name.." with any loader", 2)
+end
diff --git a/readme.md b/readme.md
index c50a48b..6bcfc8e 100644
--- a/readme.md
+++ b/readme.md
@@ -17,6 +17,7 @@ Assume the file `app/config/settings.json` exists in your project directory with
 local glass = require 'glass'
 local config = glass.bind('app/config', {
    (require 'glass.json');
+   (require 'glass.error'); -- Throw error if nothing matches
 })
 print(config.settings.user.name) -- prints "User"
 ```
@@ -36,6 +37,7 @@ Glass offers the following loaders out of the box:
 * `skooma` loads a skooma template and returns it as a function.
 * `table` looks up values in a Lua table
 * `yaml` loads a YAML file as a Lua table. (requires `lyaml`)
+* `error` pseudo-loader that throws an error.
 
 \* For easier interoperability with other template loaders, the `discount` loader returns a static function which can be called to return the generated HTML. The markdown file is only parsed the first time.