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<title>Stream</title>
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<h1>Module <a href="type_Stream.html">Stream</a></h1>
<pre><span id="MODULEStream"><span class="keyword">module</span> Stream</span>: <code class="code"><span class="keyword">sig</span></code> <a href="Stream.html">..</a> <code class="code"><span class="keyword">end</span></code></pre><div class="info module top">
<div class="info-desc">
<p>Streams and parsers.</p>
</div>
</div>
<hr width="100%">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type">'a</code> t</span> </pre>
<div class="info ">
<div class="info-desc">
<p>The type of streams holding values of type <code class="code"><span class="keywordsign">'</span>a</code>.</p>
</div>
</div>
<pre><span id="EXCEPTIONFailure"><span class="keyword">exception</span> Failure</span></pre>
<div class="info ">
<div class="info-desc">
<p>Raised by parsers when none of the first components of the stream
patterns is accepted.</p>
</div>
</div>
<pre><span id="EXCEPTIONError"><span class="keyword">exception</span> Error</span> <span class="keyword">of</span> <code class="type">string</code></pre>
<div class="info ">
<div class="info-desc">
<p>Raised by parsers when the first component of a stream pattern is
accepted, but one of the following components is rejected.</p>
</div>
</div>
<h2 id="1_Streambuilders">Stream builders</h2>
<pre><span id="VALfrom"><span class="keyword">val</span> from</span> : <code class="type">(int -> 'a option) -> 'a <a href="Stream.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p><code class="code"><span class="constructor">Stream</span>.from f</code> returns a stream built from the function <code class="code">f</code>.
To create a new stream element, the function <code class="code">f</code> is called with
the current stream count. The user function <code class="code">f</code> must return either
<code class="code"><span class="constructor">Some</span> <value></code> for a value or <code class="code"><span class="constructor">None</span></code> to specify the end of the
stream.</p>
<p>Do note that the indices passed to <code class="code">f</code> may not start at <code class="code">0</code> in the
general case. For example, <code class="code">[< <span class="keywordsign">'</span>0; <span class="keywordsign">'</span>1; <span class="constructor">Stream</span>.from f >]</code> would call
<code class="code">f</code> the first time with count <code class="code">2</code>.</p>
</div>
</div>
<pre><span id="VALof_list"><span class="keyword">val</span> of_list</span> : <code class="type">'a list -> 'a <a href="Stream.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Return the stream holding the elements of the list in the same
order.</p>
</div>
</div>
<pre><span id="VALof_string"><span class="keyword">val</span> of_string</span> : <code class="type">string -> char <a href="Stream.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Return the stream of the characters of the string parameter.</p>
</div>
</div>
<pre><span id="VALof_bytes"><span class="keyword">val</span> of_bytes</span> : <code class="type">bytes -> char <a href="Stream.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Return the stream of the characters of the bytes parameter.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.02.0</li>
</ul>
</div>
<pre><span id="VALof_channel"><span class="keyword">val</span> of_channel</span> : <code class="type"><a href="Pervasives.html#TYPEin_channel">in_channel</a> -> char <a href="Stream.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p>Return the stream of the characters read from the input channel.</p>
</div>
</div>
<h2 id="1_Streamiterator">Stream iterator</h2>
<pre><span id="VALiter"><span class="keyword">val</span> iter</span> : <code class="type">('a -> unit) -> 'a <a href="Stream.html#TYPEt">t</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code"><span class="constructor">Stream</span>.iter f s</code> scans the whole stream s, applying function <code class="code">f</code>
in turn to each stream element encountered.</p>
</div>
</div>
<h2 id="1_Predefinedparsers">Predefined parsers</h2>
<pre><span id="VALnext"><span class="keyword">val</span> next</span> : <code class="type">'a <a href="Stream.html#TYPEt">t</a> -> 'a</code></pre><div class="info ">
<div class="info-desc">
<p>Return the first element of the stream and remove it from the
stream. Raise <a href="Stream.html#EXCEPTIONFailure"><code class="code"><span class="constructor">Stream</span>.<span class="constructor">Failure</span></code></a> if the stream is empty.</p>
</div>
</div>
<pre><span id="VALempty"><span class="keyword">val</span> empty</span> : <code class="type">'a <a href="Stream.html#TYPEt">t</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p>Return <code class="code">()</code> if the stream is empty, else raise <a href="Stream.html#EXCEPTIONFailure"><code class="code"><span class="constructor">Stream</span>.<span class="constructor">Failure</span></code></a>.</p>
</div>
</div>
<h2 id="1_Usefulfunctions">Useful functions</h2>
<pre><span id="VALpeek"><span class="keyword">val</span> peek</span> : <code class="type">'a <a href="Stream.html#TYPEt">t</a> -> 'a option</code></pre><div class="info ">
<div class="info-desc">
<p>Return <code class="code"><span class="constructor">Some</span></code> of "the first element" of the stream, or <code class="code"><span class="constructor">None</span></code> if
the stream is empty.</p>
</div>
</div>
<pre><span id="VALjunk"><span class="keyword">val</span> junk</span> : <code class="type">'a <a href="Stream.html#TYPEt">t</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p>Remove the first element of the stream, possibly unfreezing
it before.</p>
</div>
</div>
<pre><span id="VALcount"><span class="keyword">val</span> count</span> : <code class="type">'a <a href="Stream.html#TYPEt">t</a> -> int</code></pre><div class="info ">
<div class="info-desc">
<p>Return the current count of the stream elements, i.e. the number
of the stream elements discarded.</p>
</div>
</div>
<pre><span id="VALnpeek"><span class="keyword">val</span> npeek</span> : <code class="type">int -> 'a <a href="Stream.html#TYPEt">t</a> -> 'a list</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">npeek n</code> returns the list of the <code class="code">n</code> first elements of
the stream, or all its remaining elements if less than <code class="code">n</code>
elements are available.</p>
</div>
</div>
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