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lua-5.4.7 2024-06-13
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‎Makefile

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@@ -46,7 +46,7 @@ TO_MAN= lua.1 luac.1
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# Lua version and release.
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V= 5.4
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R= $V.6
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R= $V.7
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# Targets start here.
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all: $(PLAT)

‎README

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This is Lua 5.4.6, released on 02 May 2023.
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This is Lua 5.4.7, released on 13 Jun 2024.
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For installation instructions, license details, and
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further information about Lua, see doc/readme.html.

‎doc/OSIApproved_100X125.png

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‎doc/contents.html

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<BODY>
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<H1>
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<A HREF="http://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
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<A HREF="https://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
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Lua 5.4 Reference Manual
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</H1>
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<P>
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The reference manual is the official definition of the Lua language.
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<BR>
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For a complete introduction to Lua programming, see the book
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<A HREF="http://www.lua.org/pil/">Programming in Lua</A>.
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<A HREF="https://www.lua.org/pil/">Programming in Lua</A>.
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<DIV CLASS="menubar">
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<A HREF="manual.html">start</A>
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&middot;
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<A HREF="#index">index</A>
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&middot;
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<A HREF="http://www.lua.org/manual/">other versions</A>
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<A HREF="https://www.lua.org/manual/">other versions</A>
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</DIV>
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<P>
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<SMALL>
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Copyright &copy; 2020&ndash;2023 Lua.org, PUC-Rio.
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Copyright &copy; 2020&ndash;2024 Lua.org, PUC-Rio.
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Freely available under the terms of the
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<A HREF="http://www.lua.org/license.html">Lua license</A>.
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<A HREF="https://www.lua.org/license.html">Lua license</A>.
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</SMALL>
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<H2><A NAME="contents">Contents</A></H2>
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<P CLASS="footer">
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Last update:
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Sat Apr 1 17:57:05 UTC 2023
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Thu May 9 14:47:09 UTC 2024
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</P>
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<!--
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Last change: revised for Lua 5.4.5
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Last change: revised for Lua 5.4.7
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-->
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</BODY>

‎doc/lua.1

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.\" $Id: lua.man,v 1.14 2022/09/23 09:06:36 lhf Exp $
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.TH LUA 1 "$Date: 2022/09/23 09:06:36 $"
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.\" $Id: lua.man,v 1.14 2024/05/08 18:48:27 lhf Exp $
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.TH LUA 1 "$Date: 2024/05/08 18:48:27 $"
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.SH NAME
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lua \- Lua interpreter
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.SH SYNOPSIS
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Code to be executed before command line options and scripts.
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.TP
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.B LUA_PATH, LUA_PATH_5_4
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Initial value of package.cpath,
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Initial value of package.path,
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the path used by require to search for Lua loaders.
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.TP
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.B LUA_CPATH, LUA_CPATH_5_4

‎doc/lua.css

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table.book img {
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border: solid #000080 1px ;
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border-radius: 2px ;
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}
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table.book span {

‎doc/manual.html

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<BODY>
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<H1>
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<A HREF="http://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
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<A HREF="https://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
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Lua 5.4 Reference Manual
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</H1>
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<P>
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<SMALL>
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Copyright &copy; 2020&ndash;2023 Lua.org, PUC-Rio.
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Copyright &copy; 2020&ndash;2024 Lua.org, PUC-Rio.
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Freely available under the terms of the
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<a href="http://www.lua.org/license.html">Lua license</a>.
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<a href="https://www.lua.org/license.html">Lua license</a>.
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</SMALL>
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<DIV CLASS="menubar">
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<A HREF="contents.html#contents">contents</A>
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&middot;
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<A HREF="contents.html#index">index</A>
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&middot;
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<A HREF="http://www.lua.org/manual/">other versions</A>
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<A HREF="https://www.lua.org/manual/">other versions</A>
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</DIV>
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<!-- ====================================================================== -->
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an <em>error object</em>
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is propagated with information about the error.
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Lua itself only generates errors whose error object is a string,
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but programs may generate errors with
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but programs can generate errors with
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any value as the error object.
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It is up to the Lua program or its host to handle such error objects.
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For historical reasons,
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<p>
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When you use <a href="#pdf-xpcall"><code>xpcall</code></a> (or <a href="#lua_pcall"><code>lua_pcall</code></a>, in C)
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you may give a <em>message handler</em>
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you can give a <em>message handler</em>
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to be called in case of errors.
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This function is called with the original error object
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and returns a new error object.
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In the previous example, the key is the string "<code>__add</code>"
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and the metamethod is the function that performs the addition.
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Unless stated otherwise,
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a metamethod may in fact be any callable value,
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a metamethod can in fact be any callable value,
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which is either a function or a value with a <code>__call</code> metamethod.
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<p>
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A label is visible in the entire block where it is defined,
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except inside nested functions.
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A goto may jump to any visible label as long as it does not
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A goto can jump to any visible label as long as it does not
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enter into the scope of a local variable.
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A label should not be declared
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where a label with the same name is visible,
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<hr><h3><a name="lua_toclose"><code>lua_toclose</code></a></h3><p>
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<span class="apii">[-0, +0, <em>m</em>]</span>
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<span class="apii">[-0, +0, <em>v</em>]</span>
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<pre>void lua_toclose (lua_State *L, int index);</pre>
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<p>
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unless previously deactivated by <a href="#lua_closeslot"><code>lua_closeslot</code></a>.
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<p>
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This function raises an error if the value at the given slot
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neither has a <code>__close</code> metamethod nor is a false value.
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This function should not be called for an index
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that is equal to or below an active to-be-closed slot.
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but can contain other zeros in its body.
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<p>
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This function can raise memory errors only
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when converting a number to a string
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(as then it may create a new string).
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with the string <code>what</code> describing which fields to fill in.
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The default for <code>what</code> is to get all information available,
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except the table of valid lines.
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If present,
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the option '<code>f</code>'
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The option '<code>f</code>'
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adds a field named <code>func</code> with the function itself.
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If present,
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the option '<code>L</code>'
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adds a field named <code>activelines</code> with the table of
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valid lines.
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The option '<code>L</code>' adds a field named <code>activelines</code>
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with the table of valid lines,
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provided the function is a Lua function.
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If the function has no debug information,
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the table is empty.
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<p>
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In particular,
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the values of <a href="#pdf-package.path"><code>package.path</code></a> and <a href="#pdf-package.cpath"><code>package.cpath</code></a>
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are set with the default paths defined in <code>luaconf.h</code>.
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To signal to the libraries that this option is on,
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the stand-alone interpreter sets the field
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<code>"LUA_NOENV"</code> in the registry to a true value.
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Other libraries may consult this field for the same purpose.
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<p>
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<P CLASS="footer">
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Last update:
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Tue May 2 20:09:38 UTC 2023
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Thu Jun 13 22:15:52 UTC 2024
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</P>
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<!--
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Last change: revised for Lua 5.4.6
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Last change: revised for Lua 5.4.7
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-->
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</body></html>

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‎doc/readme.html

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<BODY>
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<H1>
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<A HREF="http://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
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<A HREF="https://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
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Welcome to Lua 5.4
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</H1>
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<P>
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Lua is a powerful, efficient, lightweight, embeddable scripting language
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developed by a
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<A HREF="http://www.lua.org/authors.html">team</A>
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<A HREF="https://www.lua.org/authors.html">team</A>
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at
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<A HREF="http://www.puc-rio.br/">PUC-Rio</A>,
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<A HREF="https://www.puc-rio.br/">PUC-Rio</A>,
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the Pontifical Catholic University of Rio de Janeiro in Brazil.
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Lua is
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<A HREF="#license">free software</A>
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used in
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<A HREF="https://www.lua.org/uses.html">many products and projects</A>
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around the world.
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<P>
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Lua's
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<A HREF="http://www.lua.org/">official web site</A>
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<A HREF="https://www.lua.org/">official website</A>
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provides complete information
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about Lua,
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including
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an
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<A HREF="http://www.lua.org/about.html">executive summary</A>
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<A HREF="https://www.lua.org/about.html">executive summary</A>,
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tips on
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<A HREF="https://www.lua.org/start.html">getting started</A>,
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and
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updated
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<A HREF="http://www.lua.org/docs.html">documentation</A>,
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<A HREF="https://www.lua.org/docs.html">documentation</A>,
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especially the
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<A HREF="https://www.lua.org/manual/5.4/">reference manual</A>,
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which may differ slightly from the
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distributed in this package.
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<H2><A NAME="install">Installing Lua</A></H2>
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Lua is distributed in
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<A HREF="http://www.lua.org/ftp/">source</A>
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<A HREF="https://www.lua.org/ftp/">source</A>
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form.
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You need to build it before using it.
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Building Lua should be straightforward
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platforms that have an ANSI C compiler.
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Lua also compiles unmodified as C++.
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The instructions given below for building Lua are for Unix-like platforms,
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such as Linux and macOS.
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See also
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and
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<P>
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If you don't have the time or the inclination to compile Lua yourself,
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get a binary from
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<A HREF="http://lua-users.org/wiki/LuaBinaries">LuaBinaries</A>.
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<A HREF="https://luabinaries.sourceforge.net">LuaBinaries</A>.
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<H3>Building Lua</H3>
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<P>
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<OL>
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<LI>
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Open a terminal window and move to
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the top-level directory, which is named <TT>lua-5.4.7</TT>.
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The <TT>Makefile</TT> there controls both the build process and the installation process.
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<P>
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<LI>
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record the changes you've made.
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<P>
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On the other hand, if you need to customize some Lua features, you'll need
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to edit <TT>src/luaconf.h</TT> before building and installing Lua.
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edit <TT>src/luaconf.h</TT> before building and installing Lua.
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The edited file will be the one installed, and
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it will be used by any Lua clients that you build, to ensure consistency.
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Further customization is available to experts by editing the Lua sources.
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</DL>
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<P>
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To use Lua as a library in your own programs, you'll need to know how to
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To use Lua as a library in your own programs, you need to know how to
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create and use libraries with your compiler. Moreover, to dynamically load
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C libraries for Lua, you'll need to know how to create dynamic libraries
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and you'll need to make sure that the Lua API functions are accessible to
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<H2><A NAME="license">License</A></H2>
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<P>
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<A HREF="http://www.opensource.org/docs/definition.php">
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<IMG SRC="osi-certified-72x60.png" ALIGN="right" ALT="[osi certified]" STYLE="padding-left: 30px ;">
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<A HREF="https://opensource.org/osd">
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<IMG SRC="OSIApproved_100X125.png" ALIGN="right" ALT="[Open Source Initiative Approved License]" STYLE="padding-left: 1em" WIDTH=50>
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</A>
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Lua is free software distributed under the terms of the
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<A HREF="http://www.opensource.org/licenses/mit-license.html">MIT license</A>
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<A HREF="https://opensource.org/license/mit">MIT license</A>
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reproduced below;
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it may be used for any purpose, including commercial purposes,
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at absolutely no cost without having to ask us.
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The only requirement is that if you do use Lua,
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then you should give us credit by including the appropriate copyright notice somewhere in your product or its documentation.
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For details, see
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<A HREF="http://www.lua.org/license.html">this</A>.
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For details, see the
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<A HREF="https://www.lua.org/license.html">license page</A>.
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<BLOCKQUOTE STYLE="padding-bottom: 0em">
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Copyright &copy; 1994&ndash;2023 Lua.org, PUC-Rio.
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Copyright &copy; 1994&ndash;2024 Lua.org, PUC-Rio.
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<P>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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<P CLASS="footer">
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Last update:
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Tue May 2 20:08:55 UTC 2023
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Wed May 8 21:56:16 UTC 2024
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</P>
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<!--
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Last change: revised for Lua 5.4.6
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Last change: revised for Lua 5.4.7
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-->
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</BODY>

‎src/lapi.c

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o = index2value(L, idx); /* previous call may reallocate the stack */
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}
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if (len != NULL)
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*len = vslen(o);
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*len = tsslen(tsvalue(o));
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lua_unlock(L);
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return svalue(o);
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return getstr(tsvalue(o));
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}
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