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334 lines
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<!DOCTYPE html>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="theme-color" content="#375EAB">
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<title>iotest - The Go Programming Language</title>
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<link type="text/css" rel="stylesheet" href="../../../lib/godoc/style.css">
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<link rel="stylesheet" href="../../../lib/godoc/jquery.treeview.css">
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<script type="text/javascript">window.initFuncs = [];</script>
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<body>
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<div id='lowframe' style="position: fixed; bottom: 0; left: 0; height: 0; width: 100%; border-top: thin solid grey; background-color: white; overflow: auto;">
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...
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</div><!-- #lowframe -->
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<div id="topbar" class="wide"><div class="container">
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<div class="top-heading" id="heading-wide"><a href="http://localhost:6060/">The Go Programming Language</a></div>
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<div class="top-heading" id="heading-narrow"><a href="http://localhost:6060/">Go</a></div>
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<a href="index.html#" id="menu-button"><span id="menu-button-arrow">▽</span></a>
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<form method="GET" action="http://localhost:6060/search">
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<a href="http://localhost:6060/doc/">Documents</a>
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<a href="http://localhost:6060/pkg/">Packages</a>
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<a href="http://localhost:6060/project/">The Project</a>
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<div id="page" class="wide">
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<div class="container">
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<h1>Package iotest</h1>
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<div id="nav"></div>
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<!--
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file.
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-->
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<!--
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Note: Static (i.e., not template-generated) href and id
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attributes start with "pkg-" to make it impossible for
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them to conflict with generated attributes (some of which
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correspond to Go identifiers).
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-->
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<script type='text/javascript'>
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document.ANALYSIS_DATA = null;
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document.CALLGRAPH = null;
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</script>
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<div id="short-nav">
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<dl>
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<dd><code>import "testing/iotest"</code></dd>
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</dl>
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<dl>
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<dd><a href="index.html#pkg-overview" class="overviewLink">Overview</a></dd>
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<dd><a href="index.html#pkg-index" class="indexLink">Index</a></dd>
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</dl>
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</div>
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<!-- The package's Name is printed as title by the top-level template -->
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<div id="pkg-overview" class="toggleVisible">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Overview section">Overview ▹</h2>
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</div>
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Overview section">Overview ▾</h2>
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<p>
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Package iotest implements Readers and Writers useful mainly for testing.
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</p>
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</div>
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</div>
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<div id="pkg-index" class="toggleVisible">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Index section">Index ▹</h2>
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</div>
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Index section">Index ▾</h2>
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<!-- Table of contents for API; must be named manual-nav to turn off auto nav. -->
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<div id="manual-nav">
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<dl>
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<dd><a href="index.html#pkg-variables">Variables</a></dd>
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<dd><a href="index.html#DataErrReader">func DataErrReader(r io.Reader) io.Reader</a></dd>
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<dd><a href="index.html#HalfReader">func HalfReader(r io.Reader) io.Reader</a></dd>
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<dd><a href="index.html#NewReadLogger">func NewReadLogger(prefix string, r io.Reader) io.Reader</a></dd>
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<dd><a href="index.html#NewWriteLogger">func NewWriteLogger(prefix string, w io.Writer) io.Writer</a></dd>
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<dd><a href="index.html#OneByteReader">func OneByteReader(r io.Reader) io.Reader</a></dd>
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<dd><a href="index.html#TimeoutReader">func TimeoutReader(r io.Reader) io.Reader</a></dd>
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<dd><a href="index.html#TruncateWriter">func TruncateWriter(w io.Writer, n int64) io.Writer</a></dd>
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</dl>
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</div><!-- #manual-nav -->
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<h4>Package files</h4>
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<p>
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<span style="font-size:90%">
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<a href="http://localhost:6060/src/testing/iotest/logger.go">logger.go</a>
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<a href="http://localhost:6060/src/testing/iotest/reader.go">reader.go</a>
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<a href="http://localhost:6060/src/testing/iotest/writer.go">writer.go</a>
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</span>
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</p>
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</div><!-- .expanded -->
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</div><!-- #pkg-index -->
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<div id="pkg-callgraph" class="toggle" style="display: none">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Internal Call Graph section">Internal call graph ▹</h2>
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</div> <!-- .expanded -->
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Internal Call Graph section">Internal call graph ▾</h2>
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<p>
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In the call graph viewer below, each node
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is a function belonging to this package
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and its children are the functions it
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calls—perhaps dynamically.
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</p>
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<p>
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The root nodes are the entry points of the
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package: functions that may be called from
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outside the package.
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There may be non-exported or anonymous
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functions among them if they are called
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dynamically from another package.
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</p>
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<p>
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Click a node to visit that function's source code.
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From there you can visit its callers by
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clicking its declaring <code>func</code>
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token.
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</p>
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<p>
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Functions may be omitted if they were
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determined to be unreachable in the
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particular programs or tests that were
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analyzed.
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</p>
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<!-- Zero means show all package entry points. -->
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<ul style="margin-left: 0.5in" id="callgraph-0" class="treeview"></ul>
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</div>
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</div> <!-- #pkg-callgraph -->
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<h2 id="pkg-variables">Variables</h2>
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<pre>var <span id="ErrTimeout">ErrTimeout</span> = <a href="../../errors/index.html">errors</a>.<a href="../../errors/index.html#New">New</a>("timeout")</pre>
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<h2 id="DataErrReader">func <a href="http://localhost:6060/src/testing/iotest/reader.go?s=1273:1314#L35">DataErrReader</a></h2>
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<pre>func DataErrReader(r <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a></pre>
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<p>
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DataErrReader changes the way errors are handled by a Reader. Normally, a
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Reader returns an error (typically EOF) from the first Read call after the
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last piece of data is read. DataErrReader wraps a Reader and changes its
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behavior so the final error is returned along with the final data, instead
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of in the first call after the final data.
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</p>
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<h2 id="HalfReader">func <a href="http://localhost:6060/src/testing/iotest/reader.go?s=719:757#L20">HalfReader</a></h2>
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<pre>func HalfReader(r <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a></pre>
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<p>
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HalfReader returns a Reader that implements Read
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by reading half as many requested bytes from r.
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</p>
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<h2 id="NewReadLogger">func <a href="http://localhost:6060/src/testing/iotest/logger.go?s=1202:1258#L42">NewReadLogger</a></h2>
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<pre>func NewReadLogger(prefix <a href="../../builtin/index.html#string">string</a>, r <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a></pre>
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<p>
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NewReadLogger returns a reader that behaves like r except
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that it logs (using log.Print) each read to standard error,
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printing the prefix and the hexadecimal data read.
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</p>
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<h2 id="NewWriteLogger">func <a href="http://localhost:6060/src/testing/iotest/logger.go?s=659:716#L20">NewWriteLogger</a></h2>
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<pre>func NewWriteLogger(prefix <a href="../../builtin/index.html#string">string</a>, w <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Writer">Writer</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Writer">Writer</a></pre>
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<p>
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NewWriteLogger returns a writer that behaves like w except
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that it logs (using log.Printf) each write to standard error,
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printing the prefix and the hexadecimal data written.
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</p>
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<h2 id="OneByteReader">func <a href="http://localhost:6060/src/testing/iotest/reader.go?s=381:422#L5">OneByteReader</a></h2>
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<pre>func OneByteReader(r <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a></pre>
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<p>
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OneByteReader returns a Reader that implements
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each non-empty Read by reading one byte from r.
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</p>
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<h2 id="TimeoutReader">func <a href="http://localhost:6060/src/testing/iotest/reader.go?s=1970:2011#L65">TimeoutReader</a></h2>
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<pre>func TimeoutReader(r <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Reader">Reader</a></pre>
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<p>
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TimeoutReader returns ErrTimeout on the second read
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with no data. Subsequent calls to read succeed.
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</p>
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<h2 id="TruncateWriter">func <a href="http://localhost:6060/src/testing/iotest/writer.go?s=278:329#L1">TruncateWriter</a></h2>
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<pre>func TruncateWriter(w <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Writer">Writer</a>, n <a href="../../builtin/index.html#int64">int64</a>) <a href="../../io/index.html">io</a>.<a href="../../io/index.html#Writer">Writer</a></pre>
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<p>
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TruncateWriter returns a Writer that writes to w
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but stops silently after n bytes.
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</p>
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<div id="footer">
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Build version go1.6.<br>
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Except as <a href="https://developers.google.com/site-policies#restrictions">noted</a>,
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the content of this page is licensed under the
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Creative Commons Attribution 3.0 License,
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and code is licensed under a <a href="http://localhost:6060/LICENSE">BSD license</a>.<br>
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