Difference between revisions of "Debug.settypemt"
From GiderosMobile
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Revision as of 22:07, 11 February 2020
Available since: Gideros 2016.08
Class: debug
Description
Set meta table type
From http://lua-users.org/wiki/LuaPowerPatches Useful to extend Lua syntax and for some tricks.
Adds new method to debug library: debug.settypemt(type, metatable) Supported types: "nil","boolean","lightuserdata","number","string","table","function","userdata","thread".
For example:
<code>
-- enable string indexing (s[n]) to get character at utf8 position
string.__index = function(s, n) return utf8.sub(s, n, n) end
debug.settypemt("string", string)
local s = "Hello, world!"
print(s[8]) --> w
</code>
Also sets table library as default type metatable for all tables without user defined metatables i.e. enables following syntax: t:insert(3); t:remove(2); t:sort(func); etc.
debug.settypemt()
