1 files changed, 71 insertions, 0 deletions
diff --git a/www/wiki/extensions/Scribunto/includes/engines/LuaCommon/lualib/libraryUtil.lua b/www/wiki/extensions/Scribunto/includes/engines/LuaCommon/lualib/libraryUtil.lua
new file mode 100644
index 00000000..f14a7950
--- /dev/null
+++ b/www/wiki/extensions/Scribunto/includes/engines/LuaCommon/lualib/libraryUtil.lua
@@ -0,0 +1,71 @@
+local libraryUtil = {}
+
+function libraryUtil.checkType( name, argIdx, arg, expectType, nilOk )
+	if arg == nil and nilOk then
+		return
+	end
+	if type( arg ) ~= expectType then
+		local msg = string.format( "bad argument #%d to '%s' (%s expected, got %s)",
+			argIdx, name, expectType, type( arg )
+		)
+		error( msg, 3 )
+	end
+end
+
+function libraryUtil.checkTypeMulti( name, argIdx, arg, expectTypes )
+	local argType = type( arg )
+	for _, expectType in ipairs( expectTypes ) do
+		if argType == expectType then
+			return
+		end
+	end
+	local n = #expectTypes
+	local typeList
+	if n > 1 then
+		typeList = table.concat( expectTypes, ', ', 1, n - 1 ) .. ' or ' .. expectTypes[n]
+	else
+		typeList = expectTypes[1]
+	end
+	local msg = string.format( "bad argument #%d to '%s' (%s expected, got %s)",
+		argIdx,
+		name,
+		typeList,
+		type( arg )
+	)
+	error( msg, 3 )
+end
+
+function libraryUtil.checkTypeForIndex( index, value, expectType )
+	if type( value ) ~= expectType then
+		local msg = string.format( "value for index '%s' must be %s, %s given",
+			index, expectType, type( value )
+		)
+		error( msg, 3 )
+	end
+end
+
+function libraryUtil.checkTypeForNamedArg( name, argName, arg, expectType, nilOk )
+	if arg == nil and nilOk then
+		return
+	end
+	if type( arg ) ~= expectType then
+		local msg = string.format( "bad named argument %s to '%s' (%s expected, got %s)",
+			argName, name, expectType, type( arg )
+		)
+		error( msg, 3 )
+	end
+end
+
+function libraryUtil.makeCheckSelfFunction( libraryName, varName, selfObj, selfObjDesc )
+	return function ( self, method )
+		if self ~= selfObj then
+			error( string.format(
+				"%s: invalid %s. Did you call %s with a dot instead of a colon, i.e. " ..
+				"%s.%s() instead of %s:%s()?",
+				libraryName, selfObjDesc, method, varName, method, varName, method
+			), 3 )
+		end
+	end
+end
+
+return libraryUtil