Added 'strict tables', that throw very informative errors, when indexing an non-existant key.

errors.lua

@@ -139,5 +139,17 @@ return function (module_name)
         end
     end
 
+    function err_hdl.strict_table (...)
+        local args = {...}
+        if args[1] == err_hdl then  table.remove(args, 1)  end
+        return setmetatable(args[1] or {}, {
+            __index = function (t, k)
+                local keys = {}
+                for k in pairs(t) do  keys[#keys+1] = k  end
+                correct_error(err_hdl, '', 'Attempting to index unknown key %s, maybe you meant %s?', k, keys)
+            end
+        })
+    end
+
     return err_hdl
 end

test/test_errors.lua

@@ -92,6 +92,23 @@ SUITE:addTest('Correct errors has nice default string', function()
 	assert_equal(expected_error, err_msg)
 end)
 
+--------------------------------------------------------------------------------
+-- Strict table
+
+SUITE:addTest('Strict tables can be accessed normally', function()
+	local t   =  error.strict_table { a = 1, b = 2, c = 3 }
+	assert(t.a, 1)
+	assert(t.b, 2)
+	assert(t.c, 3)
+end)
+
+SUITE:addTest('Strict tables throw errors on unknown indices', function()
+	local t   =  error.strict_table { a = 1, b = 2, c = 3 }
+	bad_call(function() return t.hello end)
+end)
+
+
+
 --------------------------------------------------------------------------------
 
 return SUITE

test/tests.lua

@@ -2,6 +2,7 @@
 package.path = package.path .. ';./test/?.lua;./src/?.lua'
 
 local TEST_SUITE = require 'TestSuite' 'errors'
+      --TEST_SUITE:enableStrictGlobal()
       TEST_SUITE:addModules 'test/test_*'
       TEST_SUITE:setOptions(...)
       TEST_SUITE:runTests()