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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>MzScheme: Legacy Language</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_0");">▼</a></td><td></td><td><a href="" class="tocviewselflink" data-pltdoc="x">Mz<span class="mywbr"> </span>Scheme:<span class="mywbr"> </span> Legacy Language</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="Old_Syntactic_Forms.html" class="tocviewlink" data-pltdoc="x">Old Syntactic Forms</a></td></tr><tr><td align="right">2 </td><td><a href="Old_Functions.html" class="tocviewlink" data-pltdoc="x">Old Functions</a></td></tr><tr><td align="right">3 </td><td><a href="Extra_Libraries.html" class="tocviewlink" data-pltdoc="x">Extra Libraries</a></td></tr><tr><td align="right">4 </td><td><a href="Omitted_Forms_and_Functions.html" class="tocviewlink" data-pltdoc="x">Omitted Forms and Functions</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><span class="tocsublinknumber"></span><a href="#%28part._top%29" class="tocsubseclink" data-pltdoc="x">Mz<span class="mywbr"> </span>Scheme:<span class="mywbr"> </span> Legacy Language</a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.1</span></div><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.1", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">top</a></span><span class="navright"> <span class="nonavigation">← prev</span> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">up</a> <a href="Old_Syntactic_Forms.html" title="forward to "1 Old Syntactic Forms"" data-pltdoc="x">next →</a></span> </div><h2 x-source-module="(lib "mzscheme/mzscheme.scrbl")" x-part-tag=""top""><a name="(part._top)"></a><a name="(part._.Mz.Scheme__.Legacy_.Language)"></a><a name="(mod-path._mzscheme)"></a>MzScheme: Legacy Language</h2><p><div class="SIntrapara"><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">compatibility-lib</span></span></td></tr></table></div><div class="SIntrapara">The <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a> language provides nearly the same
bindings as the <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a> module of PLT Scheme
version 372 and earlier.</div></p><p>Unlike version 372, the <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a> language does not
include <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=r5rs&rel=r5rs-std%2Fr5rs-Z-H-9.html%23%2525_idx_416&version=6.1" class="RktValLink Sq" data-pltdoc="x">set-car!</a></span> or <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=r5rs&rel=r5rs-std%2Fr5rs-Z-H-9.html%23%2525_idx_418&version=6.1" class="RktValLink Sq" data-pltdoc="x">set-cdr!</a></span>, and <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=pairs.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._cons%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">cons</a></span>
makes immutable pairs, as in <span class="RktSym">scheme/base</span>; those changes make
modules built on <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a> reasonably compatible with
modules built on <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=scheme&rel=scheme_base.html&version=6.1" class="RktModLink Sq" data-pltdoc="x"><span class="RktSym">scheme/base</span></a>.</p><p>Otherwise, the <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a> language shares many bindings
with <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=scheme&rel=scheme_base.html&version=6.1" class="RktModLink Sq" data-pltdoc="x"><span class="RktSym">scheme/base</span></a>. It renames a few bindings, such as
<span class="RktSym"><a href="Old_Functions.html#%28def._%28%28lib._mzscheme%2Fmain..rkt%29._syntax-object-~3edatum%29%29" class="RktValLink" data-pltdoc="x">syntax-object->datum</a></span> instead of <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=stxops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._syntax-%7E3edatum%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">syntax->datum</a></span>, and
it provides old versions of some syntactic forms, such as
<span class="RktSym"><a href="Old_Syntactic_Forms.html#%28form._%28%28lib._mzscheme%2Fmain..rkt%29._lambda%29%29" class="RktStxLink" data-pltdoc="x">lambda</a></span> without support for keyword and optional arguments.
In addition, <a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">mzscheme</span></a> includes all of the exports of
<a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=tcp.html&version=6.1" class="RktModLink Sq" data-pltdoc="x"><span class="RktSym">racket/tcp</span></a> and <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=udp.html&version=6.1" class="RktModLink Sq" data-pltdoc="x"><span class="RktSym">racket/udp</span></a>.</p><table cellspacing="0" cellpadding="0"><tr><td><p><span class="hspace"> </span><a href="Old_Syntactic_Forms.html" class="toptoclink" data-pltdoc="x">1<span class="hspace"> </span>Old Syntactic Forms</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Old_Functions.html" class="toptoclink" data-pltdoc="x">2<span class="hspace"> </span>Old Functions</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Extra_Libraries.html" class="toptoclink" data-pltdoc="x">3<span class="hspace"> </span>Extra Libraries</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Omitted_Forms_and_Functions.html" class="toptoclink" data-pltdoc="x">4<span class="hspace"> </span>Omitted Forms and Functions</a></p></td></tr></table><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.1", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">top</a></span><span class="navright"> <span class="nonavigation">← prev</span> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">up</a> <a href="Old_Syntactic_Forms.html" title="forward to "1 Old Syntactic Forms"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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