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use "core/metaprogramming.nom"
use "core/text.nom"
use "core/operators.nom"
use "core/collections.nom"
use "core/control_flow.nom"
compile [using %definitions %body, using %definitions do %body] to
%setup_lua <-
Lua ".."
local fell_through = false
local ok, ret = pcall(function()
\(%definitions as lua statements)
fell_through = true
end)
%body_lua <-
Lua ".."
local fell_through = false
local ok, ret = pcall(function()
\(%body as lua statements)
fell_through = true
end)
remove free vars (declare locals in %setup_lua) from %body_lua
%lua <-
Lua ".."
do
local old_actions, old_compile_actions, old_arg_orders = ACTIONS, COMPILE_ACTIONS, ARG_ORDERS
ACTIONS = setmetatable({}, {__index=old_actions})
COMPILE_ACTIONS = setmetatable({}, {__index=old_compile_actions})
ARG_ORDERS = setmetatable({}, {__index=old_arg_orders})
\%setup_lua
if not ok then
ACTIONS, COMPILE_ACTIONS, ARG_ORDERS = old_actions, old_compile_actions, old_arg_orders
error(ret, 0)
end
if not fell_through then
ACTIONS, COMPILE_ACTIONS, ARG_ORDERS = old_actions, old_compile_actions, old_arg_orders
return ret
end
getmetatable(ACTIONS).__newindex = old_actions
getmetatable(COMPILE_ACTIONS).__newindex = old_compile_actions
getmetatable(ARG_ORDERS).__newindex = old_arg_orders
\%body_lua
ACTIONS, COMPILE_ACTIONS, ARG_ORDERS = old_actions, old_compile_actions, old_arg_orders
if not ok then
error(ret, 0)
end
if not fell_through then
return ret
end
end
declare locals in %lua
return %lua
parse [using %] as: using % (do nothing)
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