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<RefEntry id="repl-substringX3F">
<!-- This file is generated automatically from the DSSSL source. -->
<!-- Do not edit this file! -->
<?html-filename repl-substring-p.html>
<RefMeta>
<RefEntryTitle>repl-substring?</RefEntryTitle>
<RefMiscInfo Role="file">dblib.dsl</RefMiscInfo>
</RefMeta>
<RefNameDiv>
<RefName>repl-substring?</RefName>
<RefPurpose>Returns true if the specified substring can be replaced</RefPurpose>
</RefNameDiv>
<RefSynopsisDiv><Title>Synopsis</Title>
<Synopsis>
(repl-substring? string target pos)
</Synopsis>
</RefSynopsisDiv>
<RefSect1><Title>Description</Title>
<para>
Returns <literal>#t</literal> if <literal>target</literal> occurs at <literal>pos</literal> in <literal>string</literal>.</para>
</RefSect1>
<RefSect1><Title>Author</Title>
<para>
Norman Walsh, <ndw@nwalsh.com>
</para>
</RefSect1>
<RefSect1><Title>Source Code</Title>
<ProgramListing>
(define (repl-substring? string target pos)
;; Returns true if the specified substring can be replaced
(let* ((could-match (<= (+ pos (string-length target))
(string-length string)))
(match (if could-match
(substring string pos (+ pos (string-length target))) "")))
(and could-match (string=? match target))))
</ProgramListing>
</RefSect1>
</RefEntry>
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