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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>2 plt-r5rs</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="index.html" class="tocviewlink" data-pltdoc="x">R5RS:<span class="mywbr"> </span> Legacy Scheme</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="running.html" class="tocviewlink" data-pltdoc="x">Running R<span style="vertical-align: super; font-size: 80%">5</span>RS Programs</a></td></tr><tr><td align="right">2 </td><td><a href="" class="tocviewselflink" data-pltdoc="x"><span class="stt">plt-<wbr></wbr>r5rs</span></a></td></tr><tr><td align="right">3 </td><td><a href="r5rs-mod.html" class="tocviewlink" data-pltdoc="x">R<span style="vertical-align: super; font-size: 80%">5</span>RS Module Language</a></td></tr><tr><td align="right">4 </td><td><a href="r5rs_init-mod.html" class="tocviewlink" data-pltdoc="x">R<span style="vertical-align: super; font-size: 80%">5</span>RS Initialization Library</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><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, "6.7", "../");" 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("6.7");">top</a></span><span class="navright"> <a href="running.html" title="backward to "1 Running R5RS Programs"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "R5RS: Legacy Scheme"" data-pltdoc="x">up</a> <a href="r5rs-mod.html" title="forward to "3 R5RS Module Language"" data-pltdoc="x">next →</a></span> </div><h3 x-source-module="(lib "r5rs/r5rs.scrbl")" x-source-pkg="r5rs-doc" x-part-tag=""plt-r5rs"">2<tt> </tt><a name="(part._plt-r5rs)"></a><span class="stt">plt-r5rs</span></h3><p>The <span class="stt">plt-r5rs</span> executable runs an R<span style="vertical-align: super; font-size: 80%">5</span>RS program from a file
that is supplied on the command line. If no program file is provided
as a command-line argument, then a read-eval-print loop is started.</p><p>Before starting a read-eval-print loop, an initialization file is
loaded, if it exists. The file is the same as the file reported by
<span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=Filesystem.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._find-system-path%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">find-system-path</a></span><span class="stt"> </span><span class="RktVal">'</span><span class="RktVal">init-file</span><span class="RktPn">)</span>, but with the characters
<span class="RktInBG"><span class="hspace"></span><span class="RktIn">racket</span><span class="hspace"></span></span> in the filename replaced by <span class="RktInBG"><span class="hspace"></span><span class="RktIn">pltr5rs</span><span class="hspace"></span></span>. For
example, on Unix, the file is <span class="stt">"~/.pltr5rsrc"</span>.</p><p>By default, <span class="stt">plt-r5rs</span> departs from R<span style="vertical-align: super; font-size: 80%">5</span>RS conformance in one
crucial way: the names of pre-defined functions cannot be redefined at
the top level. This restriction enables better run-time
performance. Use the <a name="(idx._(gentag._0._(lib._r5rs/r5rs..scrbl)))"></a><span class="nobreak"><span class="stt">--no-prim</span></span> command-line
flag—<wbr></wbr>before a file to load, if any—<wbr></wbr>to obtain the standard behavior
for primitive bindings (at the cost of performance).</p><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, "6.7", "../");" 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("6.7");">top</a></span><span class="navright"> <a href="running.html" title="backward to "1 Running R5RS Programs"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "R5RS: Legacy Scheme"" data-pltdoc="x">up</a> <a href="r5rs-mod.html" title="forward to "3 R5RS Module Language"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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