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Merge pull request #36 from jessevanherk/master

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add assertions to catch incorrect colon-calls to gamestate
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vrld 2014-08-22 13:57:47 +02:00
commit 526ca620c9
1 changed files with 2 additions and 0 deletions
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gamestate.lua
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@ -36,6 +36,7 @@ function GS.new(t) return t or {} end -- constructor - deprecated!
function GS.switch(to, ...)
assert(to, "Missing argument: Gamestate to switch to")
assert(to ~= GS, "Can't call switch with colon operator")
local pre = stack[#stack]
;(pre.leave or __NULL__)(pre)
;(to.init or __NULL__)(to)
@ -46,6 +47,7 @@ end
function GS.push(to, ...)
assert(to, "Missing argument: Gamestate to switch to")
assert(to ~= GS, "Can't call push with colon operator")
local pre = stack[#stack]
;(to.init or __NULL__)(to)
to.init = nil