A metatable in Lua defines various extraneous behaviors for a table when indexed, modified, interacted with, etc. They are Lua's core metaprogramming feature; most well known for being useful to emulate classes much like an OOP language.
Any table (and userdata) may be assigned a metatable. You can define a metatable for a table as such:
-- Our sample table
local tab = {}
-- Our metatable
local metatable = {
-- This table is then what holds the metamethods or metafields
Install Qt5 with homebrew and link it to the system (potentially destructive operation):
$ brew install qt5
$ brew unlink qt # may fail if no Qt4 was installed previously with homebrew
$ brew link --force qt5
Additionally, it might be worth to activate the appropriate target virtualenv with:
| /* ijlat.h - v0.1a - (Simple) Lua Allocation Tracker -- public domain -- @incrediblejr, May 2016 | |
| ABOUT | |
| A simple Lua allocation tracker. | |
| USAGE | |
| The memory tracker is implemented as a [stb-style header-file library][1] which means that | |
| in *ONE* source file, put: |
| --[[ | |
| The MIT License (MIT) | |
| Copyright (c) 2015 Jakub (Kubuxu) Sztandera | |
| Permission is hereby granted, free of charge, to any person obtaining a copy | |
| of this software and associated documentation files (the "Software"), to deal | |
| in the Software without restriction, including without limitation the rights | |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| copies of the Software, and to permit persons to whom the Software is |