54 lines
2.0 KiB
Plaintext
54 lines
2.0 KiB
Plaintext
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);
|
|
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);
|
|
end
|
|
if not fell_through then
|
|
return ret;
|
|
end
|
|
end
|
|
declare locals in %lua
|
|
return %lua
|
|
|