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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head><meta http-equiv="content-type" content="text-html; charset=utf-8" /><title>2&nbsp;Our plan of attack</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="scribble-style.css" title="default" /><link rel="stylesheet" type="text/css" href="gh.css" title="default" /><script type="text/javascript" src="scribble-common.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--><meta name="keywords" content="Racket,macros,Scheme"><meta name="description" content="Practical Racket macros"><meta name="author" content="Greg Hendershott"><meta name="charset" content="utf-8"><link href='http://fonts.googleapis.com/css?family=Fenix' rel='stylesheet' type='text/css'><script type="text/javascript">var _gaq = _gaq || [];_gaq.push(['_setAccount', 'UA-29709446-1']);_gaq.push(['_setDomainName', 'greghendershott.com']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist" style="margin-bottom: 1em;"><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,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" pltdoc="x">Fear of Macros</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="Preface.html" class="tocviewlink" pltdoc="x">Preface</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="" class="tocviewselflink" pltdoc="x">Our plan of attack</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Transform_.html" class="tocviewlink" pltdoc="x">Transform!</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="pattern-matching.html" class="tocviewlink" pltdoc="x">Pattern matching:<span class="mywbr"> </span> syntax-<wbr></wbr>case and syntax-<wbr></wbr>rules</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="Syntax_parameters.html" class="tocviewlink" pltdoc="x">Syntax parameters</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="What_s_the_point_of_splicing-let_.html" class="tocviewlink" pltdoc="x">What&rsquo;s the point of <span class="RktSym"><span class="RktStxLink">splicing-<wbr></wbr>let</span></span>?</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="Robust_macros__syntax-parse.html" class="tocviewlink" pltdoc="x">Robust macros:<span class="mywbr"> </span> syntax-<wbr></wbr>parse</a></td></tr><tr><td align="right">8&nbsp;</td><td><a href="References_and_Acknowledgments.html" class="tocviewlink" pltdoc="x">References and Acknowledgments</a></td></tr><tr><td align="right">9&nbsp;</td><td><a href="Epilogue.html" class="tocviewlink" pltdoc="x">Epilogue</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft">&nbsp;&nbsp;</span><span class="navright"><a href="Preface.html" title="backward to &quot;1 Preface&quot;" pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" pltdoc="x">up</a>&nbsp;&nbsp;<a href="Transform_.html" title="forward to &quot;3 Transform!&quot;" pltdoc="x">next &rarr;</a></span>&nbsp;</div><h3>2<tt>&nbsp;</tt><a name="(part._.Our_plan_of_attack)"></a>Our plan of attack</h3><p>The macro system you will mostly want to use for production-quality <html><head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>2&nbsp;Our plan of attack</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="scribble-style.css" title="default" /><link rel="stylesheet" type="text/css" href="gh.css" title="default" /><script type="text/javascript" src="scribble-common.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--><meta name="keywords" content="Racket,macros,Scheme"><meta name="description" content="Practical Racket macros"><meta name="author" content="Greg Hendershott"><meta name="charset" content="utf-8"><link href='http://fonts.googleapis.com/css?family=Fenix' rel='stylesheet' type='text/css'><script type="text/javascript">var _gaq = _gaq || [];_gaq.push(['_setAccount', 'UA-29709446-1']);_gaq.push(['_setDomainName', 'greghendershott.com']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist" style="margin-bottom: 1em;"><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,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Fear of Macros</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="Preface.html" class="tocviewlink" data-pltdoc="x">Preface</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="" class="tocviewselflink" data-pltdoc="x">Our plan of attack</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Transform_.html" class="tocviewlink" data-pltdoc="x">Transform!</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="pattern-matching.html" class="tocviewlink" data-pltdoc="x">Pattern matching:<span class="mywbr"> </span> syntax-<wbr></wbr>case and syntax-<wbr></wbr>rules</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="Syntax_parameters.html" class="tocviewlink" data-pltdoc="x">Syntax parameters</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="What_s_the_point_of_splicing-let_.html" class="tocviewlink" data-pltdoc="x">What&rsquo;s the point of <span class="RktSym"><span class="RktStxLink">splicing-<wbr></wbr>let</span></span>?</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="Robust_macros__syntax-parse.html" class="tocviewlink" data-pltdoc="x">Robust macros:<span class="mywbr"> </span> syntax-<wbr></wbr>parse</a></td></tr><tr><td align="right">8&nbsp;</td><td><a href="References_and_Acknowledgments.html" class="tocviewlink" data-pltdoc="x">References and Acknowledgments</a></td></tr><tr><td align="right">9&nbsp;</td><td><a href="Epilogue.html" class="tocviewlink" data-pltdoc="x">Epilogue</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft">&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<a href="Preface.html" title="backward to &quot;1 Preface&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="Transform_.html" title="forward to &quot;3 Transform!&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div><h3>2<tt>&nbsp;</tt><a name="(part._.Our_plan_of_attack)"></a>Our plan of attack</h3><p>The macro system you will mostly want to use for production-quality
macros is called <span class="RktSym"><a href="http://docs.racket-lang.org/syntax/Parsing_Syntax.html#(form._((lib._syntax%2Fparse..rkt)._syntax-parse))" class="RktStxLink" pltdoc="x">syntax-parse</a></span>. And don&rsquo;t worry, we&rsquo;ll get to macros is called <span class="RktSym"><a href="http://docs.racket-lang.org/syntax/Parsing_Syntax.html#%28form._%28%28lib._syntax%2Fparse..rkt%29._syntax-parse%29%29" class="RktStxLink" data-pltdoc="x">syntax-parse</a></span>. And don&rsquo;t worry, we&rsquo;ll get to
that soon.</p><p>But if we start there, you&rsquo;re likely to feel overwhelmed by concepts that soon.</p><p>But if we start there, you&rsquo;re likely to feel overwhelmed by concepts
and terminology, and get very confused. I did.</p><p>1. Instead let&rsquo;s start with the basics: A syntax object and a function and terminology, and get very confused. I did.</p><p>1. Instead let&rsquo;s start with the basics: A syntax object and a function
to change it&#8212;<wbr></wbr>a "transformer". We&rsquo;ll work at that level for awhile to to change it&#8212;<wbr></wbr>a "transformer". We&rsquo;ll work at that level for awhile to
get comfortable and to de-mythologize this whole macro business.</p><p>2. Soon we&rsquo;ll realize that pattern-matching would make life get comfortable and to de-mythologize this whole macro business.</p><p>2. Soon we&rsquo;ll realize that pattern-matching would make life
easier. We&rsquo;ll learn about <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#(form._((lib._racket%2Fprivate%2Fstxcase-scheme..rkt)._syntax-case))" class="RktStxLink" pltdoc="x">syntax-case</a></span> and its shorthand easier. We&rsquo;ll learn about <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#%28form._%28%28lib._racket%2Fprivate%2Fstxcase-scheme..rkt%29._syntax-case%29%29" class="RktStxLink" data-pltdoc="x">syntax-case</a></span> and its shorthand
cousin, <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#(form._((lib._racket%2Fprivate%2Fmisc..rkt)._define-syntax-rule))" class="RktStxLink" pltdoc="x">define-syntax-rule</a></span>. We&rsquo;ll discover we can get cousin, <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#%28form._%28%28lib._racket%2Fprivate%2Fmisc..rkt%29._define-syntax-rule%29%29" class="RktStxLink" data-pltdoc="x">define-syntax-rule</a></span>. We&rsquo;ll discover we can get
confused if we want to munge pattern variables before sticking them confused if we want to munge pattern variables before sticking them
back in the template, and learn how to do that.</p><p>3. At this point we&rsquo;ll be able to write many useful macros. But, what back in the template, and learn how to do that.</p><p>3. At this point we&rsquo;ll be able to write many useful macros. But, what
if we want to write the ever-popular anaphoric if, with a "magic if we want to write the ever-popular anaphoric if, with a "magic
@ -19,4 +19,4 @@ they&rsquo;re used in error. Normal Racket functions optionally can have
contracts and types. These catch usage mistakes and provide clear, contracts and types. These catch usage mistakes and provide clear,
useful error messages. It would be great if there were something useful error messages. It would be great if there were something
similar for macro. There is. One of the more-recent Racket macro similar for macro. There is. One of the more-recent Racket macro
enhancements is <span class="RktSym"><a href="http://docs.racket-lang.org/syntax/Parsing_Syntax.html#(form._((lib._syntax%2Fparse..rkt)._syntax-parse))" class="RktStxLink" pltdoc="x">syntax-parse</a></span>.</p><div class="navsetbottom"><span class="navleft">&nbsp;&nbsp;</span><span class="navright"><a href="Preface.html" title="backward to &quot;1 Preface&quot;" pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" pltdoc="x">up</a>&nbsp;&nbsp;<a href="Transform_.html" title="forward to &quot;3 Transform!&quot;" pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html> enhancements is <span class="RktSym"><a href="http://docs.racket-lang.org/syntax/Parsing_Syntax.html#%28form._%28%28lib._syntax%2Fparse..rkt%29._syntax-parse%29%29" class="RktStxLink" data-pltdoc="x">syntax-parse</a></span>.</p><div class="navsetbottom"><span class="navleft">&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<a href="Preface.html" title="backward to &quot;1 Preface&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="Transform_.html" title="forward to &quot;3 Transform!&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head><meta http-equiv="content-type" content="text-html; charset=utf-8" /><title>1&nbsp;Preface</title><link rel="stylesheet" type="text/css" href="scribble.css" title="default" /><link rel="stylesheet" type="text/css" href="scribble-style.css" title="default" /><link rel="stylesheet" type="text/css" href="gh.css" title="default" /><script type="text/javascript" src="scribble-common.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--><meta name="keywords" content="Racket,macros,Scheme"><meta name="description" content="Practical Racket macros"><meta name="author" content="Greg Hendershott"><meta name="charset" content="utf-8"><link href='http://fonts.googleapis.com/css?family=Fenix' rel='stylesheet' type='text/css'><script type="text/javascript">var _gaq = _gaq || [];_gaq.push(['_setAccount', 'UA-29709446-1']);_gaq.push(['_setDomainName', 'greghendershott.com']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist" style="margin-bottom: 1em;"><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,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" pltdoc="x">Fear of Macros</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="" class="tocviewselflink" pltdoc="x">Preface</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="Our_plan_of_attack.html" class="tocviewlink" pltdoc="x">Our plan of attack</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Transform_.html" class="tocviewlink" pltdoc="x">Transform!</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="pattern-matching.html" class="tocviewlink" pltdoc="x">Pattern matching:<span class="mywbr"> </span> syntax-<wbr></wbr>case and syntax-<wbr></wbr>rules</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="Syntax_parameters.html" class="tocviewlink" pltdoc="x">Syntax parameters</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="What_s_the_point_of_splicing-let_.html" class="tocviewlink" pltdoc="x">What&rsquo;s the point of <span class="RktSym"><span class="RktStxLink">splicing-<wbr></wbr>let</span></span>?</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="Robust_macros__syntax-parse.html" class="tocviewlink" pltdoc="x">Robust macros:<span class="mywbr"> </span> syntax-<wbr></wbr>parse</a></td></tr><tr><td align="right">8&nbsp;</td><td><a href="References_and_Acknowledgments.html" class="tocviewlink" pltdoc="x">References and Acknowledgments</a></td></tr><tr><td align="right">9&nbsp;</td><td><a href="Epilogue.html" class="tocviewlink" pltdoc="x">Epilogue</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft">&nbsp;&nbsp;</span><span class="navright"><a href="index.html" title="backward to &quot;Fear of Macros&quot;" pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" pltdoc="x">up</a>&nbsp;&nbsp;<a href="Our_plan_of_attack.html" title="forward to &quot;2 Our plan of attack&quot;" pltdoc="x">next &rarr;</a></span>&nbsp;</div><h3>1<tt>&nbsp;</tt><a name="(part._.Preface)"></a>Preface</h3><p>I learned Racket after 25 years of mostly using C and C++.</p><p>Some psychic whiplash resulted.</p><p>"All the parentheses" was actually not a big deal. Instead, the first <html><head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>1&nbsp;Preface</title><link rel="stylesheet" type="text/css" href="scribble.css" title="default" /><link rel="stylesheet" type="text/css" href="scribble-style.css" title="default" /><link rel="stylesheet" type="text/css" href="gh.css" title="default" /><script type="text/javascript" src="scribble-common.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--><meta name="keywords" content="Racket,macros,Scheme"><meta name="description" content="Practical Racket macros"><meta name="author" content="Greg Hendershott"><meta name="charset" content="utf-8"><link href='http://fonts.googleapis.com/css?family=Fenix' rel='stylesheet' type='text/css'><script type="text/javascript">var _gaq = _gaq || [];_gaq.push(['_setAccount', 'UA-29709446-1']);_gaq.push(['_setDomainName', 'greghendershott.com']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist" style="margin-bottom: 1em;"><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,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Fear of Macros</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="" class="tocviewselflink" data-pltdoc="x">Preface</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="Our_plan_of_attack.html" class="tocviewlink" data-pltdoc="x">Our plan of attack</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Transform_.html" class="tocviewlink" data-pltdoc="x">Transform!</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="pattern-matching.html" class="tocviewlink" data-pltdoc="x">Pattern matching:<span class="mywbr"> </span> syntax-<wbr></wbr>case and syntax-<wbr></wbr>rules</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="Syntax_parameters.html" class="tocviewlink" data-pltdoc="x">Syntax parameters</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="What_s_the_point_of_splicing-let_.html" class="tocviewlink" data-pltdoc="x">What&rsquo;s the point of <span class="RktSym"><span class="RktStxLink">splicing-<wbr></wbr>let</span></span>?</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="Robust_macros__syntax-parse.html" class="tocviewlink" data-pltdoc="x">Robust macros:<span class="mywbr"> </span> syntax-<wbr></wbr>parse</a></td></tr><tr><td align="right">8&nbsp;</td><td><a href="References_and_Acknowledgments.html" class="tocviewlink" data-pltdoc="x">References and Acknowledgments</a></td></tr><tr><td align="right">9&nbsp;</td><td><a href="Epilogue.html" class="tocviewlink" data-pltdoc="x">Epilogue</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft">&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<a href="index.html" title="backward to &quot;Fear of Macros&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="Our_plan_of_attack.html" title="forward to &quot;2 Our plan of attack&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div><h3>1<tt>&nbsp;</tt><a name="(part._.Preface)"></a>Preface</h3><p>I learned Racket after 25 years of mostly using C and C++.</p><p>Some psychic whiplash resulted.</p><p>"All the parentheses" was actually not a big deal. Instead, the first
mind warp was functional programming. Before long I wrapped my brain mind warp was functional programming. Before long I wrapped my brain
around it, and went on to become comfortable and effective with many around it, and went on to become comfortable and effective with many
other aspects and features of Racket.</p><p>But two final frontiers remained: Macros and continuations.</p><p>I found that simple macros were easy and understandable, plus there other aspects and features of Racket.</p><p>But two final frontiers remained: Macros and continuations.</p><p>I found that simple macros were easy and understandable, plus there
@ -21,4 +21,4 @@ problems or annoyances. I learn more quickly and deeply when I
discover the answer to a question I already have, or find the solution discover the answer to a question I already have, or find the solution
to a problem whose pain I already feel. Therefore I&rsquo;ll give you the to a problem whose pain I already feel. Therefore I&rsquo;ll give you the
questions and problems first, so that you can better appreciate and questions and problems first, so that you can better appreciate and
understand the answers and solutions.</p><div class="navsetbottom"><span class="navleft">&nbsp;&nbsp;</span><span class="navright"><a href="index.html" title="backward to &quot;Fear of Macros&quot;" pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" pltdoc="x">up</a>&nbsp;&nbsp;<a href="Our_plan_of_attack.html" title="forward to &quot;2 Our plan of attack&quot;" pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html> understand the answers and solutions.</p><div class="navsetbottom"><span class="navleft">&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<a href="index.html" title="backward to &quot;Fear of Macros&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="Our_plan_of_attack.html" title="forward to &quot;2 Our plan of attack&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head><meta http-equiv="content-type" content="text-html; charset=utf-8" /><title>8&nbsp;References and Acknowledgments</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="scribble-style.css" title="default" /><link rel="stylesheet" type="text/css" href="gh.css" title="default" /><script type="text/javascript" src="scribble-common.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--><meta name="keywords" content="Racket,macros,Scheme"><meta name="description" content="Practical Racket macros"><meta name="author" content="Greg Hendershott"><meta name="charset" content="utf-8"><link href='http://fonts.googleapis.com/css?family=Fenix' rel='stylesheet' type='text/css'><script type="text/javascript">var _gaq = _gaq || [];_gaq.push(['_setAccount', 'UA-29709446-1']);_gaq.push(['_setDomainName', 'greghendershott.com']);_gaq.push(['_trackPageview']);(function() {var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;ga.src = ('https:' == document.location.protocol ? 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'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist" style="margin-bottom: 1em;"><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,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Fear of Macros</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="Preface.html" class="tocviewlink" data-pltdoc="x">Preface</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="Our_plan_of_attack.html" class="tocviewlink" data-pltdoc="x">Our plan of attack</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Transform_.html" class="tocviewlink" data-pltdoc="x">Transform!</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="pattern-matching.html" class="tocviewlink" data-pltdoc="x">Pattern matching:<span class="mywbr"> </span> syntax-<wbr></wbr>case and syntax-<wbr></wbr>rules</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="Syntax_parameters.html" class="tocviewlink" data-pltdoc="x">Syntax parameters</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="What_s_the_point_of_splicing-let_.html" class="tocviewlink" data-pltdoc="x">What&rsquo;s the point of <span class="RktSym"><span class="RktStxLink">splicing-<wbr></wbr>let</span></span>?</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="Robust_macros__syntax-parse.html" class="tocviewlink" data-pltdoc="x">Robust macros:<span class="mywbr"> </span> syntax-<wbr></wbr>parse</a></td></tr><tr><td align="right">8&nbsp;</td><td><a href="" class="tocviewselflink" data-pltdoc="x">References and Acknowledgments</a></td></tr><tr><td align="right">9&nbsp;</td><td><a href="Epilogue.html" class="tocviewlink" data-pltdoc="x">Epilogue</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft">&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<a href="Robust_macros__syntax-parse.html" title="backward to &quot;7 Robust macros: syntax-parse&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="Epilogue.html" title="forward to &quot;9 Epilogue&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div><h3>8<tt>&nbsp;</tt><a name="(part._.References_and_.Acknowledgments)"></a>References and Acknowledgments</h3><p>Eli Barzliay&rsquo;s blog post,
<a href="http://blog.racket-lang.org/2011/04/writing-syntax-case-macros.html">Writing <a href="http://blog.racket-lang.org/2011/04/writing-syntax-case-macros.html">Writing
&#8216;syntax-case&#8217; Macros</a>, helped me understand many key details and &#8216;syntax-case&#8217; Macros</a>, helped me understand many key details and
concepts, and inspired me to use a "bottom-up" approach.</p><p>Eli wrote another blog post, concepts, and inspired me to use a "bottom-up" approach.</p><p>Eli wrote another blog post,
<a href="http://blog.racket-lang.org/2008/02/dirty-looking-hygiene.html">Dirty <a href="http://blog.racket-lang.org/2008/02/dirty-looking-hygiene.html">Dirty
Looking Hygiene</a>, which explains <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stxparam.html#(form._((lib._racket%2Fstxparam..rkt)._syntax-parameterize))" class="RktStxLink" pltdoc="x">syntax-parameterize</a></span>. I Looking Hygiene</a>, which explains <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stxparam.html#%28form._%28%28lib._racket%2Fstxparam..rkt%29._syntax-parameterize%29%29" class="RktStxLink" data-pltdoc="x">syntax-parameterize</a></span>. I
relied heavily on that, mostly just updating it since his post was relied heavily on that, mostly just updating it since his post was
written before PLT Scheme was renamed to Racket.</p><p>Matthew Flatt&rsquo;s written before PLT Scheme was renamed to Racket.</p><p>Matthew Flatt&rsquo;s
<a href="http://www.cs.utah.edu/plt/publications/macromod.pdf">Composable <a href="http://www.cs.utah.edu/plt/publications/macromod.pdf">Composable
and Compilable Macros: You Want it When? (PDF)</a> explains how Racket and Compilable Macros: You Want it When? (PDF)</a> explains how Racket
handles compile time vs. run time.</p><p><a href="http://www.scheme.com/tspl4/syntax.html#./syntax:h0">Chapter handles compile time vs. run time.</p><p><a href="http://www.scheme.com/tspl4/syntax.html#./syntax:h0">Chapter
8</a> of <span style="font-style: italic">The Scheme Programming Language</span> by Kent Dybvig 8</a> of <span style="font-style: italic">The Scheme Programming Language</span> by Kent Dybvig
explains <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#(form._((lib._racket%2Fprivate%2Fstxcase-scheme..rkt)._syntax-rules))" class="RktStxLink" pltdoc="x">syntax-rules</a></span> and <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#(form._((lib._racket%2Fprivate%2Fstxcase-scheme..rkt)._syntax-case))" class="RktStxLink" pltdoc="x">syntax-case</a></span>.</p><p><a href="http://www.ccs.neu.edu/racket/pubs/icfp10-cf.pdf">Fortifying explains <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#%28form._%28%28lib._racket%2Fprivate%2Fstxcase-scheme..rkt%29._syntax-rules%29%29" class="RktStxLink" data-pltdoc="x">syntax-rules</a></span> and <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#%28form._%28%28lib._racket%2Fprivate%2Fstxcase-scheme..rkt%29._syntax-case%29%29" class="RktStxLink" data-pltdoc="x">syntax-case</a></span>.</p><p><a href="http://www.ccs.neu.edu/racket/pubs/icfp10-cf.pdf">Fortifying
Macros (PDF)</a> is the paper by Ryan Culpepper and Matthias Felleisen Macros (PDF)</a> is the paper by Ryan Culpepper and Matthias Felleisen
introducing <span class="RktSym"><a href="http://docs.racket-lang.org/syntax/Parsing_Syntax.html#(form._((lib._syntax%2Fparse..rkt)._syntax-parse))" class="RktStxLink" pltdoc="x">syntax-parse</a></span>.</p><p>Shriram Krishnamurthi looked at a very early draft and encouraged me introducing <span class="RktSym"><a href="http://docs.racket-lang.org/syntax/Parsing_Syntax.html#%28form._%28%28lib._syntax%2Fparse..rkt%29._syntax-parse%29%29" class="RktStxLink" data-pltdoc="x">syntax-parse</a></span>.</p><p>Shriram Krishnamurthi looked at a very early draft and encouraged me
to keep going. Sam Tobin-Hochstadt and Robby Findler also encouraged to keep going. Sam Tobin-Hochstadt and Robby Findler also encouraged
me. Matthew Flatt showed me how to make a Scribble me. Matthew Flatt showed me how to make a Scribble
<span class="RktSym">interaction</span> print <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#(form._((lib._racket%2Fprivate%2Fstxcase-scheme..rkt)._syntax))" class="RktStxLink" pltdoc="x">syntax</a></span> as <span class="RktVal">"syntax"</span> rather <span class="RktSym">interaction</span> print <span class="RktSym"><a href="http://docs.racket-lang.org/reference/stx-patterns.html#%28form._%28%28lib._racket%2Fprivate%2Fstxcase-scheme..rkt%29._syntax%29%29" class="RktStxLink" data-pltdoc="x">syntax</a></span> as <span class="RktVal">"syntax"</span> rather
than as <span class="RktVal">"#'"</span>. Jay McCarthy helped me catch some mistakes and than as <span class="RktVal">"#'"</span>. Jay McCarthy helped me catch some mistakes and
confusions. Jon Rafkind provided suggestions. Kieron Hardy reported a confusions. Jon Rafkind provided suggestions. Kieron Hardy reported a
font issue and some typos.</p><p>Finally, I noticed something strange. After writing much of this, when font issue and some typos.</p><p>Finally, I noticed something strange. After writing much of this, when
@ -25,4 +25,4 @@ improved since I last read it. Of course, it was the same; I&rsquo;d
changed. It&rsquo;s interesting how much of what we already know is changed. It&rsquo;s interesting how much of what we already know is
projected between the lines. My point is, the Racket documentation is projected between the lines. My point is, the Racket documentation is
very good. The <span style="font-style: italic">Guide</span> provides helpful examples and very good. The <span style="font-style: italic">Guide</span> provides helpful examples and
tutorials. The <span style="font-style: italic">Reference</span> is very clear and precise.</p><div class="navsetbottom"><span class="navleft">&nbsp;&nbsp;</span><span class="navright"><a href="Robust_macros__syntax-parse.html" title="backward to &quot;7 Robust macros: syntax-parse&quot;" pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" pltdoc="x">up</a>&nbsp;&nbsp;<a href="Epilogue.html" title="forward to &quot;9 Epilogue&quot;" pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html> tutorials. The <span style="font-style: italic">Reference</span> is very clear and precise.</p><div class="navsetbottom"><span class="navleft">&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<a href="Robust_macros__syntax-parse.html" title="backward to &quot;7 Robust macros: syntax-parse&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Fear of Macros&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="Epilogue.html" title="forward to &quot;9 Epilogue&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html>

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@ -4,7 +4,8 @@
/* Monospace: */ /* Monospace: */
.RktIn, .RktRdr, .RktPn, .RktMeta, .RktIn, .RktRdr, .RktPn, .RktMeta,
.RktMod, .RktKw, .RktVar, .RktSym, .RktMod, .RktKw, .RktVar, .RktSym,
.RktRes, .RktOut, .RktCmt, .RktVal { .RktRes, .RktOut, .RktCmt, .RktVal,
.RktBlk {
font-family: monospace; font-family: monospace;
white-space: inherit; white-space: inherit;
} }

4
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@ -26,7 +26,7 @@ function GetPageArg(key, def) {
function MergePageArgsIntoLink(a) { function MergePageArgsIntoLink(a) {
if (page_args.length == 0 || if (page_args.length == 0 ||
(!a.attributes["pltdoc"]) || (a.attributes["pltdoc"].value == "")) (!a.attributes["data-pltdoc"]) || (a.attributes["data-pltdoc"].value == ""))
return; return;
a.href.search(/^([^?#]*)(?:\?([^#]*))?(#.*)?$/); a.href.search(/^([^?#]*)(?:\?([^#]*))?(#.*)?$/);
if (RegExp.$2.length == 0) { if (RegExp.$2.length == 0) {
@ -96,7 +96,7 @@ function GotoPLTRoot(ver, relative) {
// Utilities ------------------------------------------------------------------ // Utilities ------------------------------------------------------------------
normalize_rxs = [/\/\/+/g, /\/\.(\/|$)/, /\/[^\/]*\/\.\.(\/|$)/]; var normalize_rxs = [/\/\/+/g, /\/\.(\/|$)/, /\/[^\/]*\/\.\.(\/|$)/];
function NormalizePath(path) { function NormalizePath(path) {
var tmp, i; var tmp, i;
for (i = 0; i < normalize_rxs.length; i++) for (i = 0; i < normalize_rxs.length; i++)

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@ -154,6 +154,10 @@ table td {
font-size: xx-small; /* avoid overlap with author */ font-size: xx-small; /* avoid overlap with author */
} }
.version:before, .versionNoNav:before {
content: "Version ";
}
/* ---------------------------------------- */ /* ---------------------------------------- */
/* Margin notes */ /* Margin notes */
@ -469,3 +473,15 @@ i {
display: inline; display: inline;
white-space: nowrap; white-space: nowrap;
} }
/* print styles : hide the navigation elements */
@media print {
.tocset,
.navsettop,
.navsetbottom { display: none; }
.maincolumn {
width: auto;
margin-right: 13em;
margin-left: 0;
}
}