Re: Exit one Lua state from a (C) API function
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- Subject: Re: Exit one Lua state from a (C) API function
- From: Mimmo Mane <pocomane_7a@...>
- Date: 2021年2月28日 11:18:00 +0100
On Thu, Feb 25, 2021 at 9:58 PM bel wrote:
> It cannot be just a luaL_error call, since this will be caught by a pcall in the Lua code.
Could a pcall wrapper be a good solution for you? Something like (not tested):
```
local propagate = {}
local oldpcall = pcall
pcall = function(f)
local res = table.pack(oldpcall(f)) -- [1]
-- If the "Propagate" request is found, it will forward the error to
the upper level
if not res[1] and res[2] == propagate then
error(res[2])
end
-- Otherwise, it behaves like the standard pcall
return table.unpack(res)
end
```
then, a exit_to_c function can be defined as
```
local function exit_to_c()
error(propagate)
end
```
(probably you need to wrap xpcall too)
Mimmo Mane
[1] Pack/unpack can be avoided with something like
local function result_check(f, ...)
return (function(a, ...)
if a == 'default' then
return 'default', 1, 2, 3
end
return a, ...
end)(f(...))
end
print(result_check(function() return 'foo','bar' end))
print(result_check(function() return 'default','bar' end))