163 lines
9.6 KiB
HTML
163 lines
9.6 KiB
HTML
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<!DOCTYPE html>
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<html>
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<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
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<head>
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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>String Constructors (Guile Reference Manual)</title>
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<meta name="description" content="String Constructors (Guile Reference Manual)">
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<link href="index.html" rel="start" title="Top">
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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="Strings.html" rel="up" title="Strings">
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<link href="List_002fString-Conversion.html" rel="next" title="List/String Conversion">
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<link href="String-Predicates.html" rel="prev" title="String Predicates">
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<link rel="stylesheet" type="text/css" href="https://www.gnu.org/software/gnulib/manual.css">
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</head>
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<body lang="en">
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<div class="subsubsection-level-extent" id="String-Constructors">
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<div class="nav-panel">
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<p>
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Next: <a href="List_002fString-Conversion.html" accesskey="n" rel="next">List/String conversion</a>, Previous: <a href="String-Predicates.html" accesskey="p" rel="prev">String Predicates</a>, Up: <a href="Strings.html" accesskey="u" rel="up">Strings</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="String-Constructors-1"><span>6.6.5.3 String Constructors<a class="copiable-link" href="#String-Constructors-1"> ¶</a></span></h4>
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<p>The string constructor procedures create new string objects, possibly
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initializing them with some specified character data. See also
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See <a class="xref" href="String-Selection.html">String Selection</a>, for ways to create strings from existing
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strings.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string</strong> <var class="def-var-arguments">char…</var><a class="copiable-link" href="#index-string"> ¶</a></span></dt>
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<dd><a class="index-entry-id" id="index-string-2"></a>
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<p>Return a newly allocated string made from the given character
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arguments.
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</p>
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<div class="example">
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<pre class="example-preformatted">(string #\x #\y #\z) ⇒ "xyz"
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(string) ⇒ ""
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</pre></div>
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</dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-list_002d_003estring"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list->string</strong> <var class="def-var-arguments">lst</var><a class="copiable-link" href="#index-list_002d_003estring"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string</strong> <var class="def-var-arguments">(lst)</var><a class="copiable-link" href="#index-scm_005fstring"> ¶</a></span></dt>
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<dd><a class="index-entry-id" id="index-list_002d_003estring-2"></a>
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<p>Return a newly allocated string made from a list of characters.
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</p>
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<div class="example">
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<pre class="example-preformatted">(list->string '(#\a #\b #\c)) ⇒ "abc"
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</pre></div>
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</dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-reverse_002dlist_002d_003estring"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">reverse-list->string</strong> <var class="def-var-arguments">lst</var><a class="copiable-link" href="#index-reverse_002dlist_002d_003estring"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005freverse_005flist_005fto_005fstring"><span class="category-def">C Function: </span><span><strong class="def-name">scm_reverse_list_to_string</strong> <var class="def-var-arguments">(lst)</var><a class="copiable-link" href="#index-scm_005freverse_005flist_005fto_005fstring"> ¶</a></span></dt>
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<dd><p>Return a newly allocated string made from a list of characters, in
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reverse order.
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</p>
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<div class="example">
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<pre class="example-preformatted">(reverse-list->string '(#\a #\B #\c)) ⇒ "cBa"
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</pre></div>
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</dd></dl>
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<a class="index-entry-id" id="index-make_002dstring-2"></a>
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<dl class="first-deffn">
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<dt class="deffn" id="index-make_002dstring"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-string</strong> <var class="def-var-arguments">k [chr]</var><a class="copiable-link" href="#index-make_002dstring"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fmake_005fstring"><span class="category-def">C Function: </span><span><strong class="def-name">scm_make_string</strong> <var class="def-var-arguments">(k, chr)</var><a class="copiable-link" href="#index-scm_005fmake_005fstring"> ¶</a></span></dt>
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<dd><p>Return a newly allocated string of
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length <var class="var">k</var>. If <var class="var">chr</var> is given, then all elements of
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the string are initialized to <var class="var">chr</var>, otherwise the contents
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of the string are unspecified.
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</p></dd></dl>
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<dl class="first-deftypefn">
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<dt class="deftypefn" id="index-scm_005fc_005fmake_005fstring"><span class="category-def">C Function: </span><span><code class="def-type">SCM</code> <strong class="def-name">scm_c_make_string</strong> <code class="def-code-arguments">(size_t len, SCM chr)</code><a class="copiable-link" href="#index-scm_005fc_005fmake_005fstring"> ¶</a></span></dt>
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<dd><p>Like <code class="code">scm_make_string</code>, but expects the length as a
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<code class="code">size_t</code>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dtabulate"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-tabulate</strong> <var class="def-var-arguments">proc len</var><a class="copiable-link" href="#index-string_002dtabulate"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005ftabulate"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_tabulate</strong> <var class="def-var-arguments">(proc, len)</var><a class="copiable-link" href="#index-scm_005fstring_005ftabulate"> ¶</a></span></dt>
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<dd><p><var class="var">proc</var> is an integer->char procedure. Construct a string
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of size <var class="var">len</var> by applying <var class="var">proc</var> to each index to
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produce the corresponding string element. The order in which
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<var class="var">proc</var> is applied to the indices is not specified.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002djoin"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-join</strong> <var class="def-var-arguments">ls [delimiter [grammar]]</var><a class="copiable-link" href="#index-string_002djoin"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fjoin"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_join</strong> <var class="def-var-arguments">(ls, delimiter, grammar)</var><a class="copiable-link" href="#index-scm_005fstring_005fjoin"> ¶</a></span></dt>
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<dd><p>Append the string in the string list <var class="var">ls</var>, using the string
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<var class="var">delimiter</var> as a delimiter between the elements of <var class="var">ls</var>.
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<var class="var">delimiter</var> defaults to ‘<samp class="samp"> </samp>’<!-- /@w -->, that is, strings in <var class="var">ls</var>
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are appended with the space character in between them. <var class="var">grammar</var> is
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a symbol which specifies how the delimiter is placed between the
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strings, and defaults to the symbol <code class="code">infix</code>.
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</p>
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<dl class="table">
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<dt><code class="code">infix</code></dt>
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<dd><p>Insert the separator between list elements. An empty string
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will produce an empty list.
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</p></dd>
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<dt><code class="code">strict-infix</code></dt>
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<dd><p>Like <code class="code">infix</code>, but will raise an error if given the empty
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list.
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</p></dd>
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<dt><code class="code">suffix</code></dt>
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<dd><p>Insert the separator after every list element.
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</p></dd>
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<dt><code class="code">prefix</code></dt>
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<dd><p>Insert the separator before each list element.
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</p></dd>
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</dl>
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</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="List_002fString-Conversion.html">List/String conversion</a>, Previous: <a href="String-Predicates.html">String Predicates</a>, Up: <a href="Strings.html">Strings</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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