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Merge remote-tracking branch 'explicit_globals/master'

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This commit is contained in:
Connor Olding 2018-10-11 16:45:31 +02:00
parent 130989789a 8d44432e0f
commit b7924de0c4
1 changed files with 25 additions and 0 deletions
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25
corepatchlua.lua Normal file
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@ -0,0 +1,25 @@
local mt = getmetatable(_G)
if mt == nil then
mt = {}
setmetatable(_G, mt)
end
mt.__declared = {}
function mt.__newindex(t, n, v)
if not mt.__declared[n] then
local info = debug.getinfo(2, "S")
if info and info.what ~= "main" and info.what ~= "C" then
error("cannot assign undeclared global '" .. tostring(n) .. "'", 2)
end
mt.__declared[n] = true
end
rawset(t, n, v)
end
function mt.__index(t, n)
if not mt.__declared[n] then
local info = debug.getinfo(2, "S")
if info and info.what ~= "main" and info.what ~= "C" then
error("cannot use undeclared global '" .. tostring(n) .. "'", 2)
end
end
end