levovix
/
Nim
дзеркало https://github.com/nim-lang/Nim


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435
							<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!--  This file is generated by Nim. -->
<html xmlns="https://www.w3.org/1999/xhtml" xml:lang="en" lang="en" data-theme="auto">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>std/sharedtables</title>

<!-- Google fonts -->
<link href='https://fonts.googleapis.com/css?family=Lato:400,600,900' rel='stylesheet' type='text/css'/>
<link href='https://fonts.googleapis.com/css?family=Source+Code+Pro:400,500,600' rel='stylesheet' type='text/css'/>

<!-- Favicon -->
<link rel="shortcut icon" href="data:image/x-icon;base64,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"/>
<link rel="icon" type="image/png" sizes="32x32" href="data:image/png;base64,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">

<!-- CSS -->
<link rel="stylesheet" type="text/css" href="nimdoc.out.css?v=2.3.1">

<!-- JS -->
<script type="text/javascript" src="dochack.js?v=2.3.1"></script>
</head>
<body>
  <div class="document" id="documentId">
    <div class="container">
      <h1 class="title">std/sharedtables</h1>
      <div class="row">
  <div class="three columns">
    <div class="theme-select-wrapper">
      <label for="theme-select">Theme:&nbsp;</label>
      <select id="theme-select" onchange="setTheme(this.value)">
        <option value="auto">🌗 Match OS</option>
        <option value="dark">🌑 Dark</option>
        <option value="light">🌕 Light</option>
      </select>
    </div>
    <div id="global-links">
      <ul class="simple-boot">
        <li><a href="manual.html">Manual</a></li>
        <li><a href="lib.html">Standard library</a></li>
        <li> <a id="indexLink" href="theindex.html">Index</a></li>
        <li><a href="compiler/theindex.html">Compiler docs</a></li>
        <li><a href="https://nim-lang.github.io/fusion/theindex.html">Fusion docs</a></li>
        <li><a href="https://nim-lang.github.io/Nim/">devel</a>, <a href="https://nim-lang.org/documentation.html">stable</a></li>
      </ul>
    </div>
    <div id="searchInputDiv">
      Search: <input type="search" id="searchInput"
        oninput="search()" />
    </div>
    
    <ul class="simple simple-toc" id="toc-list">
  <li>
  <a class="reference reference-toplevel" href="#6" id="56">Imports</a>
</li>
<li>
  <details open>
    <summary><a class="reference reference-toplevel" href="#7" id="57">Types</a></summary>
    <ul class="simple simple-toc-section">
      <li><a class="reference" href="#SharedTable" title="SharedTable[A; B] = object">SharedTable</a></li>

    </ul>
  </details>
</li>
<li>
  <details open>
    <summary><a class="reference reference-toplevel" href="#10" id="60">Consts</a></summary>
    <ul class="simple simple-toc-section">
      <li><a class="reference" href="#defaultInitialSize" title="defaultInitialSize = 32">defaultInitialSize</a></li>

    </ul>
  </details>
</li>
<li>
  <details open>
    <summary><a class="reference reference-toplevel" href="#12" id="62">Procs</a></summary>
    <ul class="simple simple-toc-section">
      <ul class="simple nested-toc-section">[]=
  <li><a class="reference" href="#%5B%5D%3D%2CSharedTable%5BA%2CB%5D%2CA%2CB" title="`[]=`[A, B](t: var SharedTable[A, B]; key: A; val: B)">`[]=`[A, B](t: var SharedTable[A, B]; key: A; val: B)</a></li>

</ul>
<ul class="simple nested-toc-section">add
  <li><a class="reference" href="#add%2CSharedTable%5BA%2CB%5D%2CA%2CB" title="add[A, B](t: var SharedTable[A, B]; key: A; val: B)">add[A, B](t: var SharedTable[A, B]; key: A; val: B)</a></li>

</ul>
<ul class="simple nested-toc-section">deinitSharedTable
  <li><a class="reference" href="#deinitSharedTable%2CSharedTable%5BA%2CB%5D" title="deinitSharedTable[A, B](t: var SharedTable[A, B])">deinitSharedTable[A, B](t: var SharedTable[A, B])</a></li>

</ul>
<ul class="simple nested-toc-section">del
  <li><a class="reference" href="#del%2CSharedTable%5BA%2CB%5D%2CA" title="del[A, B](t: var SharedTable[A, B]; key: A)">del[A, B](t: var SharedTable[A, B]; key: A)</a></li>

</ul>
<ul class="simple nested-toc-section">hasKeyOrPut
  <li><a class="reference" href="#hasKeyOrPut%2CSharedTable%5BA%2CB%5D%2CA%2CB" title="hasKeyOrPut[A, B](t: var SharedTable[A, B]; key: A; val: B): bool">hasKeyOrPut[A, B](t: var SharedTable[A, B]; key: A; val: B): bool</a></li>

</ul>
<ul class="simple nested-toc-section">init
  <li><a class="reference" href="#init%2CSharedTable%5BA%2CB%5D%2Cint" title="init[A, B](t: var SharedTable[A, B]; initialSize = 32)">init[A, B](t: var SharedTable[A, B]; initialSize = 32)</a></li>

</ul>
<ul class="simple nested-toc-section">len
  <li><a class="reference" href="#len%2CSharedTable%5BA%2CB%5D" title="len[A, B](t: var SharedTable[A, B]): int">len[A, B](t: var SharedTable[A, B]): int</a></li>

</ul>
<ul class="simple nested-toc-section">mget
  <li><a class="reference" href="#mget%2CSharedTable%5BA%2CB%5D%2CA" title="mget[A, B](t: var SharedTable[A, B]; key: A): var B">mget[A, B](t: var SharedTable[A, B]; key: A): var B</a></li>

</ul>
<ul class="simple nested-toc-section">mgetOrPut
  <li><a class="reference" href="#mgetOrPut%2CSharedTable%5BA%2CB%5D%2CA%2CB" title="mgetOrPut[A, B](t: var SharedTable[A, B]; key: A; val: B): var B">mgetOrPut[A, B](t: var SharedTable[A, B]; key: A; val: B): var B</a></li>

</ul>
<ul class="simple nested-toc-section">withKey
  <li><a class="reference" href="#withKey%2CSharedTable%5BA%2CB%5D%2CA%2Cproc%28A%2CB%2Cbool%29" title="withKey[A, B](t: var SharedTable[A, B]; key: A;
              mapper: proc (key: A; val: var B; pairExists: var bool))">withKey[A, B](t: var SharedTable[A, B]; key: A;
              mapper: proc (key: A; val: var B; pairExists: var bool))</a></li>

</ul>

    </ul>
  </details>
</li>
<li>
  <details open>
    <summary><a class="reference reference-toplevel" href="#18" id="68">Templates</a></summary>
    <ul class="simple simple-toc-section">
      <ul class="simple nested-toc-section">withValue
  <li><a class="reference" href="#withValue.t%2CSharedTable%5BA%2CB%5D%2CA%2Cuntyped%2Cuntyped%2Cuntyped" title="withValue[A, B](t: var SharedTable[A, B]; key: A; value, body1, body2: untyped)">withValue[A, B](t: var SharedTable[A, B]; key: A; value, body1, body2: untyped)</a></li>
<li><a class="reference" href="#withValue.t%2CSharedTable%5BA%2CB%5D%2CA%2Cuntyped%2Cuntyped" title="withValue[A, B](t: var SharedTable[A, B]; key: A; value, body: untyped)">withValue[A, B](t: var SharedTable[A, B]; key: A; value, body: untyped)</a></li>

</ul>

    </ul>
  </details>
</li>

</ul>

  </div>
  <div class="nine columns" id="content">
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L1" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L1" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

    <div id="tocRoot"></div>
    <div class="deprecation-message">
  <b>Deprecated</b> 
</div>

    <p class="module-desc"><p>Shared table support for Nim. Use plain old non GC'ed keys and values or you'll be in trouble. Uses a single lock to protect the table, lockfree implementations welcome but if lock contention is so high that you need a lockfree hash table, you're doing it wrong.</p>
<p>Unstable API.</p>
</p>
    <div class="section" id="6">
  <h1><a class="toc-backref" href="#6">Imports</a></h1>
  <dl class="item">
    <a class="reference external" href="hashes.html">hashes</a>, <a class="reference external" href="math.html">math</a>, <a class="reference external" href="locks.html">locks</a>, <a class="reference external" href="assertions.html">assertions</a>, <a class="reference external" href="outparams.html">outparams</a>
  </dl>
</div>
<div class="section" id="7">
  <h1><a class="toc-backref" href="#7">Types</a></h1>
  <dl class="item">
    <div id="SharedTable">
  <dt><pre><a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">B</span><span class="Other">]</span> <span class="Other">=</span> <span class="Keyword">object</span></pre></dt>
  <dd>
    
    generic hash SharedTable
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L25" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L25" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

  </dl>
</div>
<div class="section" id="10">
  <h1><a class="toc-backref" href="#10">Consts</a></h1>
  <dl class="item">
    <div id="defaultInitialSize">
  <dt><pre><a href="sharedtables.html#defaultInitialSize"><span class="Identifier">defaultInitialSize</span></a> <span class="Other">=</span> <span class="DecNumber">32</span></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/tableimpl.nim#L15" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/tableimpl.nim#L15" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

  </dl>
</div>
<div class="section" id="12">
  <h1><a class="toc-backref" href="#12">Procs</a></h1>
  <dl class="item">
    <div id="[]=-procs-all">
  <div id="[]=,SharedTable[A,B],A,B">
  <dt><pre><span class="Keyword">proc</span> <a href="#%5B%5D%3D%2CSharedTable%5BA%2CB%5D%2CA%2CB"><span class="Identifier">`[]=`</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <span class="Identifier">B</span><span class="Other">)</span></pre></dt>
  <dd>
    
    Puts a (key, value)-pair into <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L221" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L221" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="add-procs-all">
  <div id="add,SharedTable[A,B],A,B">
  <dt><pre><span class="Keyword">proc</span> <a href="#add%2CSharedTable%5BA%2CB%5D%2CA%2CB"><span class="Identifier">add</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <span class="Identifier">B</span><span class="Other">)</span></pre></dt>
  <dd>
    
    Puts a new (key, value)-pair into <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span></span></tt> even if <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span><span class="Punctuation">[</span><span class="Identifier">key</span><span class="Punctuation">]</span></span></tt> already exists. This can introduce duplicate keys into the table!
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L226" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L226" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="deinitSharedTable-procs-all">
  <div id="deinitSharedTable,SharedTable[A,B]">
  <dt><pre><span class="Keyword">proc</span> <a href="#deinitSharedTable%2CSharedTable%5BA%2CB%5D"><span class="Identifier">deinitSharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L253" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L253" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="del-procs-all">
  <div id="del,SharedTable[A,B],A">
  <dt><pre><span class="Keyword">proc</span> <a href="#del%2CSharedTable%5BA%2CB%5D%2CA"><span class="Identifier">del</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">)</span></pre></dt>
  <dd>
    
    Deletes <tt class="docutils literal"><span class="pre"><span class="Identifier">key</span></span></tt> from hash table <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L232" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L232" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="hasKeyOrPut-procs-all">
  <div id="hasKeyOrPut,SharedTable[A,B],A,B">
  <dt><pre><span class="Keyword">proc</span> <a href="#hasKeyOrPut%2CSharedTable%5BA%2CB%5D%2CA%2CB"><span class="Identifier">hasKeyOrPut</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <span class="Identifier">B</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#bool"><span class="Identifier">bool</span></a></pre></dt>
  <dd>
    
    Returns true if <tt class="docutils literal"><span class="pre"><span class="Identifier">key</span></span></tt> is in the table, otherwise inserts <tt class="docutils literal"><span class="pre"><span class="Identifier">value</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L164" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L164" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="init-procs-all">
  <div id="init,SharedTable[A,B],int">
  <dt><pre><span class="Keyword">proc</span> <a href="#init%2CSharedTable%5BA%2CB%5D%2Cint"><span class="Identifier">init</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">initialSize</span> <span class="Other">=</span> <span class="DecNumber">32</span><span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Creates a new hash table that is empty.</p>
<p>This proc must be called before any other usage of <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span></span></tt>.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L242" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L242" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="len-procs-all">
  <div id="len,SharedTable[A,B]">
  <dt><pre><span class="Keyword">proc</span> <a href="#len%2CSharedTable%5BA%2CB%5D"><span class="Identifier">len</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#int"><span class="Identifier">int</span></a></pre></dt>
  <dd>
    
    Number of elements in <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L237" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L237" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="mget-procs-all">
  <div id="mget,SharedTable[A,B],A">
  <dt><pre><span class="Keyword">proc</span> <a href="#mget%2CSharedTable%5BA%2CB%5D%2CA"><span class="Identifier">mget</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">)</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">B</span></pre></dt>
  <dd>
    
    Retrieves the value at <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span><span class="Punctuation">[</span><span class="Identifier">key</span><span class="Punctuation">]</span></span></tt>. The value can be modified. If <tt class="docutils literal"><span class="pre"><span class="Identifier">key</span></span></tt> is not in <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span></span></tt>, the <tt class="docutils literal"><span class="pre"><span class="Identifier">KeyError</span></span></tt> exception is raised.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L139" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L139" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="mgetOrPut-procs-all">
  <div id="mgetOrPut,SharedTable[A,B],A,B">
  <dt><pre><span class="Keyword">proc</span> <a href="#mgetOrPut%2CSharedTable%5BA%2CB%5D%2CA%2CB"><span class="Identifier">mgetOrPut</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <span class="Identifier">B</span><span class="Other">)</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">B</span></pre></dt>
  <dd>
    
    Retrieves value at <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span><span class="Punctuation">[</span><span class="Identifier">key</span><span class="Punctuation">]</span></span></tt> or puts <tt class="docutils literal"><span class="pre"><span class="Identifier">val</span></span></tt> if not present, either way returning a value which can be modified. <strong>Note</strong>: This is inherently unsafe in the context of multi-threading since it returns a pointer to <tt class="docutils literal"><span class="pre"><span class="Identifier">B</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L156" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L156" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="withKey-procs-all">
  <div id="withKey,SharedTable[A,B],A,proc(A,B,bool)">
  <dt><pre><span class="Keyword">proc</span> <a href="#withKey%2CSharedTable%5BA%2CB%5D%2CA%2Cproc%28A%2CB%2Cbool%29"><span class="Identifier">withKey</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span>
                   <span class="Identifier">mapper</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">B</span><span class="Other">;</span> <span class="Identifier">pairExists</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#bool"><span class="Identifier">bool</span></a><span class="Other">)</span><span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Computes a new mapping for the <tt class="docutils literal"><span class="pre"><span class="Identifier">key</span></span></tt> with the specified <tt class="docutils literal"><span class="pre"><span class="Identifier">mapper</span></span></tt> procedure.</p>
<p>The <tt class="docutils literal"><span class="pre"><span class="Identifier">mapper</span></span></tt> takes 3 arguments:</p>
<ol class="simple"><li><tt class="docutils literal"><span class="pre"><span class="Identifier">key</span></span></tt> - the current key, if it exists, or the key passed to <tt class="docutils literal"><span class="pre"><span class="Identifier">withKey</span></span></tt> otherwise;</li>
<li><tt class="docutils literal"><span class="pre"><span class="Identifier">val</span></span></tt> - the current value, if the key exists, or default value of the type otherwise;</li>
<li><tt class="docutils literal"><span class="pre"><span class="Identifier">pairExists</span></span></tt> - <tt class="docutils literal"><span class="pre"><span class="Identifier">true</span></span></tt> if the key exists, <tt class="docutils literal"><span class="pre"><span class="Identifier">false</span></span></tt> otherwise.</li>
</ol>
<p>The <tt class="docutils literal"><span class="pre"><span class="Identifier">mapper</span></span></tt> can can modify <tt class="docutils literal"><span class="pre"><span class="Identifier">val</span></span></tt> and <tt class="docutils literal"><span class="pre"><span class="Identifier">pairExists</span></span></tt> values to change the mapping of the key or delete it from the table. When adding a value, make sure to set <tt class="docutils literal"><span class="pre"><span class="Identifier">pairExists</span></span></tt> to <tt class="docutils literal"><span class="pre"><span class="Identifier">true</span></span></tt> along with modifying the <tt class="docutils literal"><span class="pre"><span class="Identifier">val</span></span></tt>.</p>
<p>The operation is performed atomically and other operations on the table will be blocked while the <tt class="docutils literal"><span class="pre"><span class="Identifier">mapper</span></span></tt> is invoked, so it should be short and simple.</p>
<p>Example usage:</p>
<p><pre class="listing"><span class="Comment"># If value exists, decrement it.</span>
<span class="Comment"># If it becomes zero or less, delete the key</span>
<span class="Identifier">t</span><span class="Operator">.</span><span class="Identifier">withKey</span><span class="Punctuation">(</span><span class="DecNumber">1'i64</span><span class="Punctuation">)</span> <span class="Keyword">do</span> <span class="Punctuation">(</span><span class="Identifier">k</span><span class="Punctuation">:</span> <span class="Identifier">int64</span><span class="Punctuation">,</span> <span class="Identifier">v</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">int</span><span class="Punctuation">,</span> <span class="Identifier">pairExists</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">bool</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Keyword">if</span> <span class="Identifier">pairExists</span><span class="Punctuation">:</span>
    <span class="Identifier">dec</span> <span class="Identifier">v</span>
    <span class="Keyword">if</span> <span class="Identifier">v</span> <span class="Operator">&lt;=</span> <span class="DecNumber">0</span><span class="Punctuation">:</span>
      <span class="Identifier">pairExists</span> <span class="Operator">=</span> <span class="Identifier">false</span></pre></p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L173" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L173" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>

  </dl>
</div>
<div class="section" id="18">
  <h1><a class="toc-backref" href="#18">Templates</a></h1>
  <dl class="item">
    <div id="withValue-templates-all">
  <div id="withValue.t,SharedTable[A,B],A,untyped,untyped,untyped">
  <dt><pre><span class="Keyword">template</span> <a href="#withValue.t%2CSharedTable%5BA%2CB%5D%2CA%2Cuntyped%2Cuntyped%2Cuntyped"><span class="Identifier">withValue</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span>
                         <span class="Identifier">value</span><span class="Other">,</span> <span class="Identifier">body1</span><span class="Other">,</span> <span class="Identifier">body2</span><span class="Other">:</span> <a href="system.html#untyped"><span class="Identifier">untyped</span></a><span class="Other">)</span></pre></dt>
  <dd>
    
    Retrieves the value at <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span><span class="Punctuation">[</span><span class="Identifier">key</span><span class="Punctuation">]</span></span></tt>. <tt class="docutils literal"><span class="pre"><span class="Identifier">value</span></span></tt> can be modified in the scope of the <tt class="docutils literal"><span class="pre"><span class="Identifier">withValue</span></span></tt> call.
<p><strong class="examples_text">Example:</strong></p>
<pre class="listing"><span class="Keyword">var</span> <span class="Identifier">table</span><span class="Punctuation">:</span> <span class="Identifier">SharedTable</span><span class="Punctuation">[</span><span class="Identifier">string</span><span class="Punctuation">,</span> <span class="Identifier">string</span><span class="Punctuation">]</span>
<span class="Identifier">init</span><span class="Punctuation">(</span><span class="Identifier">table</span><span class="Punctuation">)</span>

<span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;a&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;x&quot;</span>
<span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;b&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;y&quot;</span>
<span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;c&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;z&quot;</span>


<span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">withValue</span><span class="Punctuation">(</span><span class="StringLit">&quot;a&quot;</span><span class="Punctuation">,</span> <span class="Identifier">value</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Identifier">value</span><span class="Punctuation">[</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;m&quot;</span>

<span class="Keyword">var</span> <span class="Identifier">flag</span> <span class="Operator">=</span> <span class="Identifier">false</span>
<span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">withValue</span><span class="Punctuation">(</span><span class="StringLit">&quot;d&quot;</span><span class="Punctuation">,</span> <span class="Identifier">value</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Keyword">discard</span> <span class="Identifier">value</span>
  <span class="Identifier">doAssert</span> <span class="Identifier">false</span>
<span class="Keyword">do</span><span class="Punctuation">:</span> <span class="Comment"># if &quot;d&quot; notin table</span>
  <span class="Identifier">flag</span> <span class="Operator">=</span> <span class="Identifier">true</span>

<span class="Keyword">if</span> <span class="Identifier">flag</span><span class="Punctuation">:</span>
  <span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;d&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;n&quot;</span>

<span class="Identifier">assert</span> <span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">mget</span><span class="Punctuation">(</span><span class="StringLit">&quot;a&quot;</span><span class="Punctuation">)</span> <span class="Operator">==</span> <span class="StringLit">&quot;m&quot;</span>
<span class="Identifier">assert</span> <span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">mget</span><span class="Punctuation">(</span><span class="StringLit">&quot;d&quot;</span><span class="Punctuation">)</span> <span class="Operator">==</span> <span class="StringLit">&quot;n&quot;</span></pre>
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L97" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L97" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="withValue.t,SharedTable[A,B],A,untyped,untyped">
  <dt><pre><span class="Keyword">template</span> <a href="#withValue.t%2CSharedTable%5BA%2CB%5D%2CA%2Cuntyped%2Cuntyped"><span class="Identifier">withValue</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">t</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="sharedtables.html#SharedTable"><span class="Identifier">SharedTable</span></a><span class="Other">[</span><span class="Identifier">A</span><span class="Other">,</span> <span class="Identifier">B</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">:</span> <span class="Identifier">A</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">,</span> <span class="Identifier">body</span><span class="Other">:</span> <a href="system.html#untyped"><span class="Identifier">untyped</span></a><span class="Other">)</span></pre></dt>
  <dd>
    
    Retrieves the value at <tt class="docutils literal"><span class="pre"><span class="Identifier">t</span><span class="Punctuation">[</span><span class="Identifier">key</span><span class="Punctuation">]</span></span></tt>. <tt class="docutils literal"><span class="pre"><span class="Identifier">value</span></span></tt> can be modified in the scope of the <tt class="docutils literal"><span class="pre"><span class="Identifier">withValue</span></span></tt> call.
<p><strong class="examples_text">Example:</strong></p>
<pre class="listing"><span class="Keyword">var</span> <span class="Identifier">table</span><span class="Punctuation">:</span> <span class="Identifier">SharedTable</span><span class="Punctuation">[</span><span class="Identifier">string</span><span class="Punctuation">,</span> <span class="Identifier">string</span><span class="Punctuation">]</span>
<span class="Identifier">init</span><span class="Punctuation">(</span><span class="Identifier">table</span><span class="Punctuation">)</span>

<span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;a&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;x&quot;</span>
<span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;b&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;y&quot;</span>
<span class="Identifier">table</span><span class="Punctuation">[</span><span class="StringLit">&quot;c&quot;</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;z&quot;</span>

<span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">withValue</span><span class="Punctuation">(</span><span class="StringLit">&quot;a&quot;</span><span class="Punctuation">,</span> <span class="Identifier">value</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Identifier">assert</span> <span class="Identifier">value</span><span class="Punctuation">[</span><span class="Punctuation">]</span> <span class="Operator">==</span> <span class="StringLit">&quot;x&quot;</span>

<span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">withValue</span><span class="Punctuation">(</span><span class="StringLit">&quot;b&quot;</span><span class="Punctuation">,</span> <span class="Identifier">value</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Identifier">value</span><span class="Punctuation">[</span><span class="Punctuation">]</span> <span class="Operator">=</span> <span class="StringLit">&quot;modified&quot;</span>

<span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">withValue</span><span class="Punctuation">(</span><span class="StringLit">&quot;b&quot;</span><span class="Punctuation">,</span> <span class="Identifier">value</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Identifier">assert</span> <span class="Identifier">value</span><span class="Punctuation">[</span><span class="Punctuation">]</span> <span class="Operator">==</span> <span class="StringLit">&quot;modified&quot;</span>

<span class="Identifier">table</span><span class="Operator">.</span><span class="Identifier">withValue</span><span class="Punctuation">(</span><span class="StringLit">&quot;nonexistent&quot;</span><span class="Punctuation">,</span> <span class="Identifier">value</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Identifier">assert</span> <span class="Identifier">false</span> <span class="Comment"># not called</span></pre>
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/collections/sharedtables.nim#L63" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/collections/sharedtables.nim#L63" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>

  </dl>
</div>

  </div>
</div>

      <div class="twelve-columns footer">
        <span class="nim-sprite"></span>
        <br>
        <small style="color: var(--hint);">Made with Nim. Generated: 2025-02-03 14:57:17 UTC</small>
      </div>
    </div>
  </div>
      <script defer data-domain="nim-lang.org" src="https://plausible.io/js/plausible.js"></script>
    
</body>
</html>