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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><meta name="viewport" content="width=device-width, initial-scale=0.8"/><title>12 Macros</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="extras.css" title="default"/><link rel="stylesheet" type="text/css" href="icons.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">The Racket Reference</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="model.html" class="tocviewlink" data-pltdoc="x">Language Model</a></td></tr><tr><td align="right">2 </td><td><a href="notation.html" class="tocviewlink" data-pltdoc="x">Notation for Documentation</a></td></tr><tr><td align="right">3 </td><td><a href="syntax.html" class="tocviewlink" data-pltdoc="x">Syntactic Forms</a></td></tr><tr><td align="right">4 </td><td><a href="data.html" class="tocviewlink" data-pltdoc="x">Datatypes</a></td></tr><tr><td align="right">5 </td><td><a href="structures.html" class="tocviewlink" data-pltdoc="x">Structures</a></td></tr><tr><td align="right">6 </td><td><a href="mzlib_class.html" class="tocviewlink" data-pltdoc="x">Classes and Objects</a></td></tr><tr><td align="right">7 </td><td><a href="mzlib_unit.html" class="tocviewlink" data-pltdoc="x">Units</a></td></tr><tr><td align="right">8 </td><td><a href="contracts.html" class="tocviewlink" data-pltdoc="x">Contracts</a></td></tr><tr><td align="right">9 </td><td><a href="match.html" class="tocviewlink" data-pltdoc="x">Pattern Matching</a></td></tr><tr><td align="right">10 </td><td><a href="control.html" class="tocviewlink" data-pltdoc="x">Control Flow</a></td></tr><tr><td align="right">11 </td><td><a href="concurrency.html" class="tocviewlink" data-pltdoc="x">Concurrency and Parallelism</a></td></tr><tr><td align="right">12 </td><td><a href="Macros.html" class="tocviewselflink" data-pltdoc="x">Macros</a></td></tr><tr><td align="right">13 </td><td><a href="input-and-output.html" class="tocviewlink" data-pltdoc="x">Input and Output</a></td></tr><tr><td align="right">14 </td><td><a href="security.html" class="tocviewlink" data-pltdoc="x">Reflection and Security</a></td></tr><tr><td align="right">15 </td><td><a href="os.html" class="tocviewlink" data-pltdoc="x">Operating System</a></td></tr><tr><td align="right">16 </td><td><a href="memory.html" class="tocviewlink" data-pltdoc="x">Memory Management</a></td></tr><tr><td align="right">17 </td><td><a href="unsafe.html" class="tocviewlink" data-pltdoc="x">Unsafe Operations</a></td></tr><tr><td
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are parsed. In particular, the subsection <a href="syntax-model.html#%28part._expand-steps%29" data-pltdoc="x">Expansion Steps</a>
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describes how parsing triggers macros, and
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<a href="syntax-model.html#%28part._transformer-model%29" data-pltdoc="x">Transformer Bindings</a> describes how macro transformers are
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called.</p><table cellspacing="0" cellpadding="0"><tr><td><p><span class="hspace"> </span><a href="stx-patterns.html" class="toclink" data-pltdoc="x">12.1<span class="hspace"> </span>Pattern-Based Syntax Matching</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxops.html" class="toclink" data-pltdoc="x">12.2<span class="hspace"> </span>Syntax Object Content</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxops.html#%28part._.Syntax_.Object_.Source_.Locations%29" class="toclink" data-pltdoc="x">12.2.1<span class="hspace"> </span>Syntax Object Source Locations</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxcmp.html" class="toclink" data-pltdoc="x">12.3<span class="hspace"> </span>Syntax Object Bindings</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxtrans.html" class="toclink" data-pltdoc="x">12.4<span class="hspace"> </span>Syntax Transformers</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxtrans.html#%28part._require-trans%29" class="toclink" data-pltdoc="x">12.4.1<span class="hspace"> </span><span class="RktSym"><span class="RktStxLink">require</span></span> Transformers</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxtrans.html#%28part._provide-trans%29" class="toclink" data-pltdoc="x">12.4.2<span class="hspace"> </span><span class="RktSym"><span class="RktStxLink">provide</span></span> Transformers</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxtrans.html#%28part._keyword-trans%29" class="toclink" data-pltdoc="x">12.4.3<span class="hspace"> </span>Keyword-Argument Conversion Introspection</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxtrans.html#%28part._portal-syntax%29" class="toclink" data-pltdoc="x">12.4.4<span class="hspace"> </span>Portal Syntax Bindings</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxparam.html" class="toclink" data-pltdoc="x">12.5<span class="hspace"> </span>Syntax Parameters</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxparam.html#%28part._.Syntax_.Parameter_.Inspection%29" class="toclink" data-pltdoc="x">12.5.1<span class="hspace"> </span>Syntax Parameter Inspection</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="splicing.html" class="toclink" data-pltdoc="x">12.6<span class="hspace"> </span>Local Binding with Splicing Body</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxprops.html" class="toclink" data-pltdoc="x">12.7<span class="hspace"> </span>Syntax Object Properties</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="stxcerts.html" class="toclink" data-pltdoc="x">12.8<span class="hspace"> </span>Syntax Taints</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Expanding_Top-Level_Forms.html" class="toclink" data-pltdoc="x">12.9<span class="hspace"> </span>Expanding Top-Level Forms</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Expanding_Top-Level_Forms.html#%28part._modinfo%29" class="toclink" data-pltdoc="x">12.9.1<span class="hspace"> </span>Information on Expanded Modules</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Serializing_Syntax.html" class="toclink" data-pltdoc="x">12.10<span class="hspace"> </span>Serializing Syntax</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="include.html" class="toclink" data-pltdoc="x">12.11<span class="hspace"> </span>File Inclusion</a></p></td>
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