Difference between revisions of "Module:No globals"
From D&D 5e
(don't bother saving old __index or __newindex) |
m (9 revisions imported: Export Template:Quote from mediawiki.org) |
||
| (7 intermediate revisions by 6 users not shown) | |||
| Line 1: | Line 1: | ||
local mt = getmetatable(_G) or {} | local mt = getmetatable(_G) or {} | ||
function mt.__index (t, k) | function mt.__index (t, k) | ||
| − | if | + | if k ~= 'arg' then |
error('Tried to read nil global ' .. tostring(k), 2) | error('Tried to read nil global ' .. tostring(k), 2) | ||
end | end | ||
| Line 7: | Line 7: | ||
end | end | ||
function mt.__newindex(t, k, v) | function mt.__newindex(t, k, v) | ||
| − | if | + | if k ~= 'arg' then |
error('Tried to write global ' .. tostring(k), 2) | error('Tried to write global ' .. tostring(k), 2) | ||
end | end | ||
Latest revision as of 21:41, 28 January 2018
Documentation for this module may be created at Module:No globals/doc
local mt = getmetatable(_G) or {}
function mt.__index (t, k)
if k ~= 'arg' then
error('Tried to read nil global ' .. tostring(k), 2)
end
return nil
end
function mt.__newindex(t, k, v)
if k ~= 'arg' then
error('Tried to write global ' .. tostring(k), 2)
end
rawset(t, k, v)
end
setmetatable(_G, mt)
