137 lines
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HTML
137 lines
15 KiB
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- This manual documents Guile version 3.0.10.
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Inc.
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with no
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Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
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copy of the license is included in the section entitled "GNU Free
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Documentation License." -->
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<title>Building CPS (Guile Reference Manual)</title>
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<meta name="description" content="Building CPS (Guile Reference Manual)">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Continuation_002dPassing-Style.html" rel="up" title="Continuation-Passing Style">
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<link href="CPS-Soup.html" rel="next" title="CPS Soup">
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</head>
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<body lang="en">
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<div class="subsubsection-level-extent" id="Building-CPS">
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<div class="nav-panel">
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<p>
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Next: <a href="CPS-Soup.html" accesskey="n" rel="next">CPS Soup</a>, Previous: <a href="CPS-in-Guile.html" accesskey="p" rel="prev">CPS in Guile</a>, Up: <a href="Continuation_002dPassing-Style.html" accesskey="u" rel="up">Continuation-Passing Style</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<h4 class="subsubsection" id="Building-CPS-1"><span>9.4.4.3 Building CPS<a class="copiable-link" href="#Building-CPS-1"> ¶</a></span></h4>
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<p>Unlike Tree-IL, the CPS language is built to be constructed and
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deconstructed with abstract macros instead of via procedural
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constructors or accessors, or instead of S-expression matching.
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</p>
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<p>Deconstruction and matching is handled adequately by the <code class="code">match</code>
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form from <code class="code">(ice-9 match)</code>. See <a class="xref" href="Pattern-Matching.html">Pattern Matching</a>. Construction
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is handled by a set of mutually builder macros:
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<code class="code">build-term</code>, <code class="code">build-cont</code>, and <code class="code">build-exp</code>.
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</p>
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<p>In the following interface definitions, consider <code class="code">term</code> and
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<code class="code">exp</code> to be built by <code class="code">build-term</code> or <code class="code">build-exp</code>,
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respectively. Consider any other name to be evaluated as a Scheme
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expression. Many of these forms recognize <code class="code">unquote</code> in some
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contexts, to splice in a previously-built value; see the specifications
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below for full details.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-build_002dterm"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">,val</var><a class="copiable-link" href="#index-build_002dterm"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($continue k src exp)</var><a class="copiable-link" href="#index-build_002dterm-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">,val</var><a class="copiable-link" href="#index-build_002dexp"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($const val)</var><a class="copiable-link" href="#index-build_002dexp-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($prim name)</var><a class="copiable-link" href="#index-build_002dexp-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-3"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($fun kentry)</var><a class="copiable-link" href="#index-build_002dexp-3"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-4"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($const-fun kentry)</var><a class="copiable-link" href="#index-build_002dexp-4"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-5"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($code kentry)</var><a class="copiable-link" href="#index-build_002dexp-5"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-6"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($rec names syms funs)</var><a class="copiable-link" href="#index-build_002dexp-6"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-7"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($call proc (arg ...))</var><a class="copiable-link" href="#index-build_002dexp-7"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-8"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($call proc args)</var><a class="copiable-link" href="#index-build_002dexp-8"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-9"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($callk k proc (arg ...))</var><a class="copiable-link" href="#index-build_002dexp-9"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-10"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($callk k proc args)</var><a class="copiable-link" href="#index-build_002dexp-10"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-11"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($primcall name param (arg ...))</var><a class="copiable-link" href="#index-build_002dexp-11"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-12"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($primcall name param args)</var><a class="copiable-link" href="#index-build_002dexp-12"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-13"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($values (arg ...))</var><a class="copiable-link" href="#index-build_002dexp-13"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-14"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($values args)</var><a class="copiable-link" href="#index-build_002dexp-14"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dexp-15"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-exp</strong> <var class="def-var-arguments">($prompt escape? tag handler)</var><a class="copiable-link" href="#index-build_002dexp-15"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($branch kf kt src op param (arg ...))</var><a class="copiable-link" href="#index-build_002dterm-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-3"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($branch kf kt src op param args)</var><a class="copiable-link" href="#index-build_002dterm-3"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-4"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($switch kf kt* src arg)</var><a class="copiable-link" href="#index-build_002dterm-4"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-5"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($throw src op param (arg ...))</var><a class="copiable-link" href="#index-build_002dterm-5"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-6"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($throw src op param args)</var><a class="copiable-link" href="#index-build_002dterm-6"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dterm-7"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-term</strong> <var class="def-var-arguments">($prompt k kh src escape? tag)</var><a class="copiable-link" href="#index-build_002dterm-7"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">,val</var><a class="copiable-link" href="#index-build_002dcont"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">($kargs (name ...) (sym ...) term)</var><a class="copiable-link" href="#index-build_002dcont-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">($kargs names syms term)</var><a class="copiable-link" href="#index-build_002dcont-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont-3"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">($kreceive req rest kargs)</var><a class="copiable-link" href="#index-build_002dcont-3"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont-4"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">($kfun src meta self ktail kclause)</var><a class="copiable-link" href="#index-build_002dcont-4"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont-5"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">($kclause ,arity kbody kalt)</var><a class="copiable-link" href="#index-build_002dcont-5"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-build_002dcont-6"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">build-cont</strong> <var class="def-var-arguments">($kclause (req opt rest kw aok?) kbody)</var><a class="copiable-link" href="#index-build_002dcont-6"> ¶</a></span></dt>
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<dd><p>Construct a CPS term, expression, or continuation.
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</p></dd></dl>
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<p>There are a few more miscellaneous interfaces as well.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-make_002darity"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-arity</strong> <var class="def-var-arguments">req opt rest kw allow-other-keywords?</var><a class="copiable-link" href="#index-make_002darity"> ¶</a></span></dt>
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<dd><p>A procedural constructor for <code class="code">$arity</code> objects.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-rewrite_002dterm"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">rewrite-term</strong> <var class="def-var-arguments">val (pat term) ...</var><a class="copiable-link" href="#index-rewrite_002dterm"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-rewrite_002dexp"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">rewrite-exp</strong> <var class="def-var-arguments">val (pat exp) ...</var><a class="copiable-link" href="#index-rewrite_002dexp"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-rewrite_002dcont"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">rewrite-cont</strong> <var class="def-var-arguments">val (pat cont) ...</var><a class="copiable-link" href="#index-rewrite_002dcont"> ¶</a></span></dt>
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<dd><p>Match <var class="var">val</var> against the series of patterns <var class="var">pat...</var>, using
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<code class="code">match</code>. The body of the matching clause should be a template in
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the syntax of <code class="code">build-term</code>, <code class="code">build-exp</code>, or <code class="code">build-cont</code>,
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respectively.
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</p></dd></dl>
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</div>
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<hr>
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<div class="nav-panel">
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<p>
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Next: <a href="CPS-Soup.html">CPS Soup</a>, Previous: <a href="CPS-in-Guile.html">CPS in Guile</a>, Up: <a href="Continuation_002dPassing-Style.html">Continuation-Passing Style</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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