awesome/lib/gears/debug.lua.in

---------------------------------------------------------------------------
-- @author Uli Schlachter
-- @copyright 2010 Uli Schlachter
-- @release @AWESOME_VERSION@
---------------------------------------------------------------------------

local error = error
local tostring = tostring
local traceback = debug.traceback

module("gears.debug")

--- Check that the given condition holds true, else throw an error
-- @param cond If this is false, throw a lua error with a backtrace.
-- @param message Message to print in the error (optional).
function assert(cond, message)
    local message = message or cond
    if not cond then
        error(traceback("Assertion failed: '" .. tostring(message) .. "'"))
    end
end

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