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use "core"
# TODO: make codegen less verbose
lua> "CLASSES = {}"
immediately
compile [@, me] to: Lua value "self"
action [new %classname %inst]
=lua "setmetatable(\%inst, CLASSES[\%classname])"
immediately
parse [new %classname] as: new %classname {}
compile [as %instance %body] to
Lua ".."
do
local self = \(%instance as lua expr)
local old_self = self.class:set_self(self)
old_actions, ACTIONS = ACTIONS, self.class.ACTIONS
old_compile_actions, COMPILE_ACTIONS = COMPILE_ACTIONS, self.class.COMPILE_ACTIONS
old_arg_orders, ARG_ORDERS = ARG_ORDERS, self.class.ARG_ORDERS
local fell_through = false
local ok, ret = pcall(function()
\(%body as lua statements)
fell_through = true
end)
self.class:set_self(old_self)
ACTIONS = old_actions
COMPILE_ACTIONS = old_compile_actions
ARG_ORDERS = old_arg_orders
if not ok then error(ret) end
if not fell_through then return ret end
end
parse [object %classname %class_body] as
using
%cls <- {..}
name:%classname
ACTIONS:=lua "ACTIONS", COMPILE_ACTIONS:=lua "COMPILE_ACTIONS"
ARG_ORDERS:=lua "ARG_ORDERS"
(=lua "CLASSES").%classname <- %cls
lua> ".."
setmetatable(\%cls, {__tostring=function() return \%classname end})
local self = nil
\%cls.set_self = function(_, inst)
local old_self = self
self = inst
return old_self
end
\%cls.__index = \%cls
\%cls.class = \%cls
%class_body
run ".."
action [new \%classname %inst]
say "NEWING"
return: =lua "setmetatable(\\%inst, \\%cls)"
lua> ".."
if ACTIONS["as text"] then
\%cls.__tostring = ACTIONS["as text"]
end
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