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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>4.5 Evaluation and Examples</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="../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="../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">Scribble:<span class="mywbr"> </span> The Racket Documentation Tool</a></td></tr></table></div><div class="tocviewsublisttop" style="display: none;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="getting-started.html" class="tocviewlink" data-pltdoc="x">Getting Started</a></td></tr><tr><td align="right">2 </td><td><a href="reader.html" class="tocviewlink" data-pltdoc="x">@ Syntax</a></td></tr><tr><td align="right">3 </td><td><a href="generic-prose.html" class="tocviewlink" data-pltdoc="x">High-<wbr></wbr>Level Scribble API</a></td></tr><tr><td align="right">4 </td><td><a href="plt-manuals.html" class="tocviewselflink" data-pltdoc="x">Scribbling Documentation</a></td></tr><tr><td align="right">5 </td><td><a href="lp.html" class="tocviewlink" data-pltdoc="x">Literate Programming</a></td></tr><tr><td align="right">6 </td><td><a href="internals.html" class="tocviewlink" data-pltdoc="x">Low-<wbr></wbr>Level Scribble API</a></td></tr><tr><td align="right">7 </td><td><a href="running.html" class="tocviewlink" data-pltdoc="x">Running <span class="stt">scribble</span></a></td></tr><tr><td align="right"></td><td><a href="doc-index.html" class="tocviewlink" data-pltdoc="x">Index</a></td></tr></table></div></div><div class="tocviewlist"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_1");">▼</a></td><td>4 </td><td><a href="plt-manuals.html" class="tocviewlink" data-pltdoc="x">Scribbling Documentation</a></td></tr></table><div class="tocviewsublistbottom" style="display: block;" id="tocview_1"><table cellspacing="0" cellpadding="0"><tr><td align="right">4.1 </td><td><a href="how-to-doc.html" class="tocviewlink" data-pltdoc="x">Getting Started with Documentation</a></td></tr><tr><td align="right">4.2 </td><td><a href="reference-style.html" class="tocviewlink" data-pltdoc="x">Style Guide</a></td></tr><tr><td align="right">4.3 </td><td><a href="manual.html" class="tocviewlink" data-pltdoc="x">Manual Forms</a></td></tr><tr><td align="right">4.4 </td><td><a href="scheme.html" class="tocviewlink" data-pltdoc="x">Racket</a></td></tr><tr><td align="right">4.5 </td><td><a href="" class="tocviewselflink" data-pltdoc="x">Evaluation and Examples</a></td></tr><tr><td align="right">4.6 </td><td><a href="srcdoc.html" class="tocviewlink" data-pltdoc="x">In-<wbr></wbr>Source Documentation</a></td></tr><tr><td align="right">4.7 </td><td><a href="bnf.html" class="tocviewlink" data-pltdoc="x">BNF Grammars</a></td></tr><tr><td align="right">4.8 </td><td><a href="Compatibility_Libraries.html" class="tocviewlink" data-pltdoc="x">Compatibility Libraries</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">interaction</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction0%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">interaction0</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%2Fno-prompt%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">interaction/<span class="mywbr"> </span>no-<wbr></wbr>prompt</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">interaction-<wbr></wbr>eval</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval-show%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">interaction-<wbr></wbr>eval-<wbr></wbr>show</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._racketblock%2Beval%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">racketblock+<span class="mywbr"> </span>eval</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._racketblock0%2Beval%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">racketblock0+<span class="mywbr"> </span>eval</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._racketmod%2Beval%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">racketmod+<span class="mywbr"> </span>eval</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._def%2Bint%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">def+<span class="mywbr"> </span>int</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._defs%2Bint%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">defs+<span class="mywbr"> </span>int</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._examples%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">examples</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._defexamples%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">defexamples</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">make-<wbr></wbr>base-<wbr></wbr>eval</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval-factory%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">make-<wbr></wbr>base-<wbr></wbr>eval-<wbr></wbr>factory</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-eval-factory%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">make-<wbr></wbr>eval-<wbr></wbr>factory</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._close-eval%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">close-<wbr></wbr>eval</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._scribble-eval-handler%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">scribble-<wbr></wbr>eval-<wbr></wbr>handler</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._scribble-exn-~3estring%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">scribble-<wbr></wbr>exn-<wbr></wbr>>string</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._with-eval-preserve-source-locations%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">with-<wbr></wbr>eval-<wbr></wbr>preserve-<wbr></wbr>source-<wbr></wbr>locations</span></span></a></td></tr></table></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, "6.1", "../");" 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"> <a href="scheme.html" title="backward to "4.4 Racket"" data-pltdoc="x">← prev</a> <a href="plt-manuals.html" title="up to "4 Scribbling Documentation"" data-pltdoc="x">up</a> <a href="srcdoc.html" title="forward to "4.6 In-Source Documentation"" data-pltdoc="x">next →</a></span> </div><h4 x-source-module="(lib "scribblings/scribble/scribble.scrbl")" x-part-tag=""eval"">4.5<tt> </tt><a name="(part._eval)"></a><a name="(mod-path._scribble/eval)"></a>Evaluation and Examples</h4><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">scribble/eval</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">scribble-lib</span></span></td></tr></table></div><div class="SIntrapara">The <span class="RktSym">scribble/eval</span> library provides
utilities for evaluating code at document-build time and incorporating
the results in the document, especially to show example uses of
defined procedures and syntax.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._interaction))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">interaction</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="stt"> </span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="specgrammar"><tr><td align="right" valign="baseline"><span class="RktVar">maybe-eval</span></td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="center" valign="baseline">=</td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td></td></tr></table></td></tr><tr><td align="right" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="center" valign="baseline">|</td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="RktPn">#:eval</span><span class="hspace"> </span><span class="RktVar">eval-expr</span></td></tr><tr><td align="right" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="center" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="stt"> </span></td></tr><tr><td align="right" valign="baseline"><span class="RktVar">maybe-escape</span></td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="center" valign="baseline">=</td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td></td></tr></table></td></tr><tr><td align="right" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="center" valign="baseline">|</td><td align="left" valign="baseline"><span class="stt"> </span></td><td align="left" valign="baseline"><span class="RktPn">#:escape</span><span class="hspace"> </span><span class="RktVar">escape-id</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="scribble_manual_code.html#%28form._%28%28lib._scribble%2Fmanual..rkt%29._racketinput%29%29" class="RktStxLink" data-pltdoc="x">racketinput</a></span>, except that the result for each input
<span class="RktVar">datum</span> is shown on the next line. The result is determined by
evaluating the <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=quote.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._quote%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">quote</a></span>d form of the <span class="RktVar">datum</span> using the
evaluator produced by <span class="RktVar">eval-expr</span>, if provided.</div></p><p>The <span class="RktVar">eval-expr</span> must produce a sandbox evaluator via
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._make-evaluator%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">make-evaluator</a></span> or <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._make-module-evaluator%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">make-module-evaluator</a></span> with the
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._sandbox-output%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">sandbox-output</a></span> and <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._sandbox-error-output%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">sandbox-error-output</a></span> parameters
set to <span class="RktVal">'</span><span class="RktVal">string</span>. If <span class="RktVar">eval-expr</span> is not provided, an
evaluator is created using <span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval%29%29" class="RktValLink" data-pltdoc="x">make-base-eval</a></span>. See also
<span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-eval-factory%29%29" class="RktValLink" data-pltdoc="x">make-eval-factory</a></span>.</p><p>If the value of <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=eval.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._current-print%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">current-print</a></span> in the sandbox is changed from
its default value, or if <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Writing.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._print-as-expression%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">print-as-expression</a></span> in the sandbox
is set to <span class="RktVal">#f</span>, then each evaluation result is formatted to a
port by applying <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=eval.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._current-print%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">current-print</a></span><span class="RktPn">)</span> to the value; the output
port is set to a pipe that supports specials in the sense of
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Byte_and_String_Output.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._write-special%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">write-special</a></span>, and non-character values written to the port
are used as <a href="core.html#%28tech._content%29" class="techoutside" data-pltdoc="x"><span class="techinside">content</span></a>. Otherwise, when the default
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=eval.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._current-print%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">current-print</a></span> is in place, result values are typeset using
<span class="RktSym"><a href="scheme.html#%28def._%28%28lib._scribble%2Fracket..rkt%29._to-element%2Fno-color%29%29" class="RktValLink" data-pltdoc="x">to-element/no-color</a></span>.</p><p>Certain patterns in <span class="RktVar">datum</span> are treated specially:</p><ul><li><p>A <span class="RktVar">datum</span> of the form
<span class="RktPn">(</span><a name="(idx._(gentag._6._(lib._scribblings/scribble/scribble..scrbl)))"></a><span class="RktSym">code:line</span><span class="stt"> </span><span class="RktVar">code-datum</span><span class="stt"> </span><span class="RktPn">(</span><span class="RktSym">code:comment</span><span class="stt"> </span><span class="RktVar">comment-datum</span><span class="stt"> </span><span class="RktMeta"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=stx-patterns.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fstxcase-scheme..rkt%2529._......%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">...</a></span><span class="RktPn">)</span><span class="RktPn">)</span>
is treated as <span class="RktVar">code-datum</span> for evaluation.</p></li><li><p>Other uses of <span class="RktSym">code:comment</span> and
<span class="RktSym">code:blank</span> are stripped from each <span class="RktVar">datum</span>
before evaluation.</p></li><li><p>A <span class="RktVar">datum</span> of the form
<span class="RktPn">(</span><a name="(idx._(gentag._7._(lib._scribblings/scribble/scribble..scrbl)))"></a><span class="RktSym">eval:alts</span><span class="stt"> </span><span class="RktVar">show-datum</span><span class="stt"> </span><span class="RktVar">eval-datum</span><span class="RktPn">)</span>
is treated as <span class="RktVar">show-datum</span> for typesetting and <span class="RktVar">eval-datum</span> for evaluation.</p></li><li><p>A <span class="RktVar">datum</span> of the form
<span class="RktPn">(</span><a name="(idx._(gentag._8._(lib._scribblings/scribble/scribble..scrbl)))"></a><span class="RktSym">eval:check</span><span class="stt"> </span><span class="RktVar">eval-datum</span><span class="stt"> </span><span class="RktVar">expect-datum</span><span class="RktPn">)</span>
is treated like <span class="RktVar">eval-datum</span>, but <span class="RktVar">check-datum</span> is also
evaluated, and an error is raised if they are not <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._equal%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">equal?</a></span>.</p></li><li><p>A <span class="RktVar">datum</span> of the form
<span class="RktPn">(</span><a name="(idx._(gentag._9._(lib._scribblings/scribble/scribble..scrbl)))"></a><span class="RktSym">eval:result</span><span class="stt"> </span><span class="RktVar">content-expr</span><span class="stt"> </span><span class="RktVar">out-expr</span><span class="stt"> </span><span class="RktVar">err-expr</span><span class="RktPn">)</span>
involves no sandboxed evaluation; instead, the <a href="core.html#%28tech._content%29" class="techoutside" data-pltdoc="x"><span class="techinside">content</span></a> result of <span class="RktVar">content-expr</span> is used as the
typeset form of the result, <span class="RktVar">out-expr</span> is treated as output printed
by the expression, and <span class="RktVar">err-expr</span> is error output printed by the
expression. The <span class="RktVar">out-expr</span> and/or <span class="RktVar">err-expr</span> can be omitted,
in which case they default to empty strings.</p><p>Normally, <span class="RktSym">eval:result</span>
is used in the second part of an <span class="RktSym">eval:alts</span> combination.</p></li><li><p>A <span class="RktVar">datum</span> of the form
<span class="RktPn">(</span><a name="(idx._(gentag._10._(lib._scribblings/scribble/scribble..scrbl)))"></a><span class="RktSym">eval:results</span><span class="stt"> </span><span class="RktVar">content-list-expr</span><span class="stt"> </span><span class="RktVar">out-expr</span><span class="stt"> </span><span class="RktVar">err-expr</span><span class="RktPn">)</span>
is treated like an <span class="RktSym">eval:result</span> form, except that <span class="RktVar">content-list-expr</span>
should produce a list of <a href="core.html#%28tech._content%29" class="techoutside" data-pltdoc="x"><span class="techinside">content</span></a> for multiple results of evaluation. As
with <span class="RktSym">eval:result</span>, <span class="RktVar">out-expr</span> and <span class="RktVar">err-expr</span> are optional.</p></li></ul><p>As an example,</p><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="RktMeta">#lang</span><span class="hspace"> </span><span class="RktMeta"></span><a href="manual.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">scribble/manual</span></a><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="RktPn">@</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="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">racket/sandbox</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">scribble/eval</span><span class="RktPn">)</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="RktPn">@</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=define.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._define%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">define</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">my-evaluator</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></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=parameters.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fmore-scheme..rkt%2529._parameterize%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">parameterize</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktPn">(</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=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._sandbox-output%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">sandbox-output</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=quote.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._quote%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">'</a></span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string</a></span><span class="RktPn">]</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></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=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._sandbox-error-output%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">sandbox-error-output</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=quote.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._quote%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">'</a></span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string</a></span><span class="RktPn">]</span><span class="RktPn">)</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></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=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._make-evaluator%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">make-evaluator</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=quote.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._quote%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">'</a></span><span class="RktSym">typed/racket/base</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="RktPn">@</span><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span><span class="RktPn">[</span><span class="RktPn">#:eval</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">my-evaluator</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"> </span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktPn">(</span><span class="RktSym">:</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">my-sqr</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktPn">(</span><span class="RktSym">Real</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">Real</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></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=define.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._define%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">define</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktPn">(</span><span class="RktSym">my-sqr</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">x</span><span class="RktPn">)</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></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=generic-numbers.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._%252A%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">*</a></span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">x</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktSym">x</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktMeta"></span></td></tr><tr><td><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktPn">(</span><span class="RktSym">my-sqr</span><span class="RktMeta"></span><span class="hspace"> </span><span class="RktMeta"></span><span class="RktVal">42</span><span class="RktPn">)</span><span class="RktPn">]</span><span class="RktMeta"></span></td></tr></table></blockquote><p>uses an evaluator whose language is <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=ts-reference&rel=index.html&version=6.1" class="RktModLink Sq" data-pltdoc="x"><span class="RktSym">typed/racket/base</span></a>.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._interaction0))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction0%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">interaction0</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span>, but without insetting the code via
<span class="RktSym"><a href="base.html#%28def._%28%28lib._scribble%2Fbase..rkt%29._nested%29%29" class="RktValLink" data-pltdoc="x">nested</a></span>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._interaction/no-prompt))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%2Fno-prompt%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">interaction/no-prompt</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span>, but does not render the output with a prompt.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._interaction-eval))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">interaction-eval</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span>, evaluates the <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=quote.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._quote%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">quote</a></span>d form of
<span class="RktVar">datum</span>, but returns the empty string and does not catch errors.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._interaction-eval-show))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval-show%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">interaction-eval-show</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval%29%29" class="RktStxLink" data-pltdoc="x">interaction-eval</a></span>, but produces an element representing
the printed form of the evaluation result.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._racketblock+eval))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._racketblock%2Beval%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">racketblock+eval</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Combines <span class="RktSym"><a href="scribble_manual_code.html#%28form._%28%28lib._scribble%2Fmanual..rkt%29._racketblock%29%29" class="RktStxLink" data-pltdoc="x">racketblock</a></span> and <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval%29%29" class="RktStxLink" data-pltdoc="x">interaction-eval</a></span>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._racketblock0+eval))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._racketblock0%2Beval%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">racketblock0+eval</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Combines <span class="RktSym"><a href="scribble_manual_code.html#%28form._%28%28lib._scribble%2Fmanual..rkt%29._racketblock0%29%29" class="RktStxLink" data-pltdoc="x">racketblock0</a></span> and <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval%29%29" class="RktStxLink" data-pltdoc="x">interaction-eval</a></span>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._racketmod+eval))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._racketmod%2Beval%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">racketmod+eval</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">name</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Combines <span class="RktSym"><a href="scribble_manual_code.html#%28form._%28%28lib._scribble%2Fmanual..rkt%29._racketmod%29%29" class="RktStxLink" data-pltdoc="x">racketmod</a></span> and <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction-eval%29%29" class="RktStxLink" data-pltdoc="x">interaction-eval</a></span>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._def+int))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._def%2Bint%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">def+int</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">defn-datum</span><span class="hspace"> </span><span class="RktVar">expr-datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span>, except the <span class="RktVar">defn-datum</span> is
typeset as for <span class="RktSym"><a href="scribble_manual_code.html#%28form._%28%28lib._scribble%2Fmanual..rkt%29._racketblock%29%29" class="RktStxLink" data-pltdoc="x">racketblock</a></span> (i.e., no prompt) and a line of
space is inserted before the <span class="RktVar">expr-datum</span>s.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._defs+int))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._defs%2Bint%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">defs+int</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktVar">defn-datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktVar">expr-datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._def%2Bint%29%29" class="RktStxLink" data-pltdoc="x">def+int</a></span>, but for multiple leading definitions.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._examples))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._examples%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">examples</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span>, but with an “Examples:” label prefixed.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._defexamples))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._defexamples%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">defexamples</a></span></span><span class="hspace"> </span><span class="RktVar">maybe-eval</span><span class="hspace"> </span><span class="RktVar">maybe-escape</span><span class="hspace"> </span><span class="RktVar">datum</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._examples%29%29" class="RktStxLink" data-pltdoc="x">examples</a></span>, but each definition using <span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=define.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._define%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">define</a></span> or
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=define-struct.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._define-struct%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">define-struct</a></span> among the <span class="RktVar">datum</span>s is typeset without a
prompt, and with line of space after it.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td><span class="RktPn">(</span><a name="(def._((lib._scribble/eval..rkt)._make-base-eval))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval%29%29" class="RktValDef RktValLink" data-pltdoc="x">make-base-eval</a></span></span></td><td><span class="hspace"> </span>[</td><td><span class="RktPn">#:pretty-print?</span><span class="hspace"> </span><span class="RktVar">pretty-print?</span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:lang</span><span class="hspace"> </span><span class="RktVar">lang</span>]</td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktVar">input-program</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></td><td><span class="hspace"> </span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span>→<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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">pretty-print?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">#t</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">lang</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Module_Names_and_Loading.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._module-path%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">module-path?</a></span></td></tr><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._list%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">list/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">special</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=symbols.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._symbol%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">symbol?</a></span><span class="RktPn">)</span></td></tr><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._cons%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">cons/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">begin</span><span class="hspace"> </span><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._list%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">list?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td><td><span class="hspace"> </span></td><td>=</td><td><span class="hspace"> </span></td><td><span class="RktVal">'</span><span class="RktVal">(</span><span class="RktVal">begin</span><span class="RktVal">)</span></td></tr></table></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">input-program</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span></td></tr></table></blockquote></div><div class="SIntrapara">Creates an evaluator using <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=Sandboxed_Evaluation.html%23%2528def._%2528%2528lib._racket%252Fsandbox..rkt%2529._make-evaluator%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">make-evaluator</a></span><span class="stt"> </span><span class="RktVal">'</span><span class="RktVal">racket/base</span><span class="stt"> </span><span class="RktPn">#:lang</span><span class="stt"> </span><span class="RktVar">lang</span><span class="stt"> </span><span class="RktVar">input-program</span><span class="stt"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=stx-patterns.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fstxcase-scheme..rkt%2529._......%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">...</a></span><span class="RktPn">)</span>,
setting sandbox parameters to disable limits, setting the outputs to
<span class="RktVal">'</span><span class="RktVal">string</span>, and not adding extra security guards.</div></p><p>If <span class="RktVar">pretty-print?</span> is true, the sandbox’s printer is set to
<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=pretty-print.html%23%2528def._%2528%2528lib._racket%252Fpretty..rkt%2529._pretty-print-handler%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">pretty-print-handler</a></span>.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td><span class="RktPn">(</span><a name="(def._((lib._scribble/eval..rkt)._make-base-eval-factory))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval-factory%29%29" class="RktValDef RktValLink" data-pltdoc="x">make-base-eval-factory</a></span></span></td><td><span class="hspace"> </span></td><td><span class="RktVar">mod-paths</span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span>[</td><td><span class="RktPn">#:pretty-print?</span><span class="hspace"> </span><span class="RktVar">pretty-print?</span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:lang</span><span class="hspace"> </span><span class="RktVar">lang</span>]<span class="RktPn">)</span></td><td><span class="hspace"> </span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span>→<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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">mod-paths</span><span class="hspace"> </span>:<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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._listof%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">listof</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Module_Names_and_Loading.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._module-path%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">module-path?</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">pretty-print?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">#t</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">lang</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Module_Names_and_Loading.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._module-path%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">module-path?</a></span></td></tr><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._list%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">list/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">special</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=symbols.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._symbol%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">symbol?</a></span><span class="RktPn">)</span></td></tr><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._cons%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">cons/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">begin</span><span class="hspace"> </span><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._list%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">list?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td><td><span class="hspace"> </span></td><td>=</td><td><span class="hspace"> </span></td><td><span class="RktVal">'</span><span class="RktVal">(</span><span class="RktVal">begin</span><span class="RktVal">)</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Produces a function that is like <span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval%29%29" class="RktValLink" data-pltdoc="x">make-base-eval</a></span>, except that
each module in <span class="RktVar">mod-paths</span> is attached to the evaluator’s
namespace. The modules are loaded and instantiated once (when the
returned <span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval%29%29" class="RktValLink" data-pltdoc="x">make-base-eval</a></span>-like function is called the first
time) and then attached to each evaluator that is created.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td><span class="RktPn">(</span><a name="(def._((lib._scribble/eval..rkt)._make-eval-factory))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-eval-factory%29%29" class="RktValDef RktValLink" data-pltdoc="x">make-eval-factory</a></span></span></td><td><span class="hspace"> </span></td><td><span class="RktVar">mod-paths</span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span>[</td><td><span class="RktPn">#:pretty-print?</span><span class="hspace"> </span><span class="RktVar">pretty-print?</span></td><td><span class="hspace"> </span></td></tr><tr><td><span class="hspace"> </span></td><td><span class="hspace"> </span></td><td><span class="RktPn">#:lang</span><span class="hspace"> </span><span class="RktVar">lang</span>]<span class="RktPn">)</span></td><td><span class="hspace"> </span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span>→<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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">mod-paths</span><span class="hspace"> </span>:<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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._listof%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">listof</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Module_Names_and_Loading.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._module-path%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">module-path?</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">pretty-print?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">#t</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">lang</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Module_Names_and_Loading.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._module-path%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">module-path?</a></span></td></tr><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._list%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">list/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">special</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=symbols.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._symbol%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">symbol?</a></span><span class="RktPn">)</span></td></tr><tr><td><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._cons%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">cons/c</a></span><span class="hspace"> </span><span class="RktVal">'</span><span class="RktVal">begin</span><span class="hspace"> </span><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._list%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">list?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td><td><span class="hspace"> </span></td><td>=</td><td><span class="hspace"> </span></td><td><span class="RktVal">'</span><span class="RktVal">(</span><span class="RktVal">begin</span><span class="RktVal">)</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval-factory%29%29" class="RktValLink" data-pltdoc="x">make-base-eval-factory</a></span>, but each module in <span class="RktVar">mod-paths</span> is
also required into the top-level environment for each generated evaluator.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._scribble/eval..rkt)._close-eval))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._close-eval%29%29" class="RktValDef RktValLink" data-pltdoc="x">close-eval</a></span></span><span class="hspace"> </span><span class="RktVar">eval</span><span class="RktPn">)</span><span class="hspace"> </span>→<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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._one-of%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">one-of/c</a></span><span class="hspace"> </span><span class="RktVal">""</span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">eval</span><span class="hspace"> </span>:<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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span></td></tr></table></blockquote></div><div class="SIntrapara">Shuts down an evaluator produced by <span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._make-base-eval%29%29" class="RktValLink" data-pltdoc="x">make-base-eval</a></span>. Use
<span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._close-eval%29%29" class="RktValLink" data-pltdoc="x">close-eval</a></span> when garbage collection cannot otherwise reclaim
an evaluator (e.g., because it is defined in a module body).</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>parameter</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._scribble/eval..rkt)._scribble-eval-handler))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._scribble-eval-handler%29%29" class="RktValDef RktValLink" data-pltdoc="x">scribble-eval-handler</a></span></span><span class="RktPn"></span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktPn">(</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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._boolean%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">boolean?</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="RktPn">(</span><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._scribble-eval-handler%29%29" class="RktValDef RktValLink" data-pltdoc="x">scribble-eval-handler</a></span></span><span class="hspace"> </span><span class="RktVar">handler</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">handler</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._boolean%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">boolean?</a></span><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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><span class="RktPn"> .</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">any</a></span><span class="RktPn">)</span></td></tr></table></blockquote></div><div class="SIntrapara">A parameter that serves as a hook for evaluation. The evaluator to use
is supplied as the first argument to the parameter’s value, and the
second argument is the form to evaluate. The last argument is
<span class="RktVal">#t</span> if exceptions are being captured (to display exception
results), <span class="RktVal">#f</span> otherwise.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>parameter</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._scribble/eval..rkt)._scribble-exn-~3estring))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._scribble-exn-~3estring%29%29" class="RktValDef RktValLink" data-pltdoc="x">scribble-exn->string</a></span></span><span class="RktPn"></span><span class="RktPn">)</span><span class="hspace"> </span>→<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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=exns.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._exn%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">exn?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="RktPn">(</span><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28def._%28%28lib._scribble%2Feval..rkt%29._scribble-exn-~3estring%29%29" class="RktValDef RktValLink" data-pltdoc="x">scribble-exn->string</a></span></span><span class="hspace"> </span><span class="RktVar">handler</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">handler</span><span class="hspace"> </span>:<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=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-></span></a></span><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=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._or%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=exns.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._exn%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">exn?</a></span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="RktPn">)</span></td></tr></table></blockquote></div><div class="SIntrapara">A parameter that controls how exceptions are rendered by
<span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span>. Defaults to
</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><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=lambda.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._%7Ece%7Ebb%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">λ</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">e</span><span class="RktPn">)</span></td></tr><tr><td><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=if.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._if%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">if</a></span><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=exns.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._exn%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">exn?</a></span><span class="hspace"> </span><span class="RktSym">e</span><span class="RktPn">)</span></td></tr><tr><td><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=exns.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._exn-message%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">exn-message</a></span><span class="hspace"> </span><span class="RktSym">e</span><span class="RktPn">)</span></td></tr><tr><td><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=Writing.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._format%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">format</a></span><span class="hspace"> </span><span class="RktVal">"uncaught exception: ~s"</span><span class="hspace"> </span><span class="RktSym">e</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></blockquote></div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._scribble/eval..rkt)._with-eval-preserve-source-locations))"></a><span title="Provided from: scribble/eval | Package: scribble-lib"><span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._with-eval-preserve-source-locations%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">with-eval-preserve-source-locations</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">By default, the evaluation forms provided by this module, such as
<span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._interaction%29%29" class="RktStxLink" data-pltdoc="x">interaction</a></span> and <span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._examples%29%29" class="RktStxLink" data-pltdoc="x">examples</a></span>, discard the source
locations from the expressions they evaluate. Within a
<span class="RktSym"><a href="#%28form._%28%28lib._scribble%2Feval..rkt%29._with-eval-preserve-source-locations%29%29" class="RktStxLink" data-pltdoc="x">with-eval-preserve-source-locations</a></span> form, the source
locations are preserved. This can be useful for documenting forms that
depend on source locations, such as Redex’s typesetting macros.</div></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, "6.1", "../");" 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"> <a href="scheme.html" title="backward to "4.4 Racket"" data-pltdoc="x">← prev</a> <a href="plt-manuals.html" title="up to "4 Scribbling Documentation"" data-pltdoc="x">up</a> <a href="srcdoc.html" title="forward to "4.6 In-Source Documentation"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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