Module:No globals: Difference between revisions
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Latest revision as of 18:20, 12 November 2022
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 | <translate> This module is rated as [[<tvar name=1>Special:MyLanguage/Category:Modules for general use</tvar>|ready for general use]].</translate> <translate> It has reached a mature form and is thought to be bug-free and ready for use wherever appropriate.</translate> <translate> It is ready to mention on help pages and other resources as an option for new users to learn.</translate> <translate> To reduce server load and bad output, it should be improved by sandbox testing rather than repeated trial-and-error editing.</translate> |
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Usage
Include this module at the top of your code. An error will be raised any time your code tries to read or write to a non-local (undeclared) variable.
Tests
| Module:No globals | success: 1, error: 0, skipped: 0 |
| Module:No globals/sandbox | success: 1, error: 0, skipped: 0 |
- See test cases
- Diff sandbox code
local mt = getmetatable(_G) or {}
function mt.__index (t, k)
if k ~= 'arg' then
-- perf optimization here and below: do not load Module:TNT unless there is an error
error(require('Module:TNT').format('I18n/No globals', 'err-read', tostring(k)), 2)
end
return nil
end
function mt.__newindex(t, k, v)
if k ~= 'arg' then
error(require('Module:TNT').format('I18n/No globals', 'err-write', tostring(k)), 2)
end
rawset(t, k, v)
end
setmetatable(_G, mt)
