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      <h1 class="title">std/asyncfutures</h1>
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  <li>
  <a class="reference reference-toplevel" href="#6" id="56">Imports</a>
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<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="#Future" title="Future[T] = ref object of FutureBase
  ## Stored value">Future</a></li>
<li><a class="reference" href="#FutureBase" title="FutureBase = ref object of RootObj
  error*: ref Exception      ## Stored exception
  errorStackTrace*: string
  when not defined(release) or defined(futureLogging):
    ## For debugging purposes only.">FutureBase</a></li>
<li><a class="reference" href="#FutureError" title="FutureError = object of Defect
  cause*: FutureBase">FutureError</a></li>
<li><a class="reference" href="#FutureVar" title="FutureVar[T] = distinct Future[T]">FutureVar</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="#isFutureLoggingEnabled" title="isFutureLoggingEnabled = false">isFutureLoggingEnabled</a></li>
<li><a class="reference" href="#NimAsyncContinueSuffix" title="NimAsyncContinueSuffix = &quot;NimAsyncContinue&quot;">NimAsyncContinueSuffix</a></li>

    </ul>
  </details>
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<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="#%24%2Cseq%5BStackTraceEntry%5D" title="`$`(stackTraceEntries: seq[StackTraceEntry]): string">`$`(stackTraceEntries: seq[StackTraceEntry]): string</a></li>

</ul>
<ul class="simple nested-toc-section">addCallback
  <li><a class="reference" href="#addCallback%2CFutureBase%2Cproc%29" title="addCallback(future: FutureBase; cb: proc () {.closure, gcsafe.})">addCallback(future: FutureBase; cb: proc () {.closure, gcsafe.})</a></li>
<li><a class="reference" href="#addCallback%2CFuture%5BT%5D%2Cproc%28Future%5BT%5D%29" title="addCallback[T](future: Future[T];
               cb: proc (future: Future[T]) {.closure, gcsafe.})">addCallback[T](future: Future[T];
               cb: proc (future: Future[T]) {.closure, gcsafe.})</a></li>

</ul>
<ul class="simple nested-toc-section">all
  <li><a class="reference" href="#all%2Cvarargs%5BFuture%5BT%5D%5D" title="all[T](futs: varargs[Future[T]]): auto">all[T](futs: varargs[Future[T]]): auto</a></li>

</ul>
<ul class="simple nested-toc-section">and
  <li><a class="reference" href="#and%2CFuture%5BT%5D%2CFuture%5BY%5D" title="`and`[T, Y](fut1: Future[T]; fut2: Future[Y]): Future[void]">`and`[T, Y](fut1: Future[T]; fut2: Future[Y]): Future[void]</a></li>

</ul>
<ul class="simple nested-toc-section">asyncCheck
  <li><a class="reference" href="#asyncCheck%2CFuture%5BT%5D" title="asyncCheck[T](future: Future[T])">asyncCheck[T](future: Future[T])</a></li>

</ul>
<ul class="simple nested-toc-section">callback=
  <li><a class="reference" href="#callback%3D%2CFutureBase%2Cproc%29" title="callback=(future: FutureBase; cb: proc () {.closure, gcsafe.})">callback=(future: FutureBase; cb: proc () {.closure, gcsafe.})</a></li>
<li><a class="reference" href="#callback%3D%2CFuture%5BT%5D%2Cproc%28Future%5BT%5D%29" title="callback=[T](future: Future[T]; cb: proc (future: Future[T]) {.closure, gcsafe.})">callback=[T](future: Future[T]; cb: proc (future: Future[T]) {.closure, gcsafe.})</a></li>

</ul>
<ul class="simple nested-toc-section">callSoon
  <li><a class="reference" href="#callSoon%2Cproc%29" title="callSoon(cbproc: proc () {.gcsafe.})">callSoon(cbproc: proc () {.gcsafe.})</a></li>

</ul>
<ul class="simple nested-toc-section">clean
  <li><a class="reference" href="#clean%2CFutureVar%5BT%5D" title="clean[T](future: FutureVar[T])">clean[T](future: FutureVar[T])</a></li>

</ul>
<ul class="simple nested-toc-section">clearCallbacks
  <li><a class="reference" href="#clearCallbacks%2CFutureBase" title="clearCallbacks(future: FutureBase)">clearCallbacks(future: FutureBase)</a></li>

</ul>
<ul class="simple nested-toc-section">complete
  <li><a class="reference" href="#complete%2CFuture%5Bvoid%5D" title="complete(future: Future[void]; val = Future[void].default)">complete(future: Future[void]; val = Future[void].default)</a></li>
<li><a class="reference" href="#complete%2CFuture%5BT%5D%2CsinkT" title="complete[T](future: Future[T]; val: sink T)">complete[T](future: Future[T]; val: sink T)</a></li>
<li><a class="reference" href="#complete%2CFutureVar%5BT%5D" title="complete[T](future: FutureVar[T])">complete[T](future: FutureVar[T])</a></li>
<li><a class="reference" href="#complete%2CFutureVar%5BT%5D%2CsinkT" title="complete[T](future: FutureVar[T]; val: sink T)">complete[T](future: FutureVar[T]; val: sink T)</a></li>

</ul>
<ul class="simple nested-toc-section">fail
  <li><a class="reference" href="#fail%2CFuture%5BT%5D%2Cref.Exception" title="fail[T](future: Future[T]; error: ref Exception)">fail[T](future: Future[T]; error: ref Exception)</a></li>

</ul>
<ul class="simple nested-toc-section">failed
  <li><a class="reference" href="#failed%2CFutureBase" title="failed(future: FutureBase): bool">failed(future: FutureBase): bool</a></li>

</ul>
<ul class="simple nested-toc-section">finished
  <li><a class="reference" href="#finished" title="finished(future: FutureBase | FutureVar): bool">finished(future: FutureBase | FutureVar): bool</a></li>

</ul>
<ul class="simple nested-toc-section">getCallSoonProc
  <li><a class="reference" href="#getCallSoonProc" title="getCallSoonProc(): (proc (cbproc: proc ()) {.gcsafe.})">getCallSoonProc(): (proc (cbproc: proc ()) {.gcsafe.})</a></li>

</ul>
<ul class="simple nested-toc-section">mget
  <li><a class="reference" href="#mget%2CFutureVar%5BT%5D" title="mget[T](future: FutureVar[T]): var T">mget[T](future: FutureVar[T]): var T</a></li>

</ul>
<ul class="simple nested-toc-section">newFuture
  <li><a class="reference" href="#newFuture%2Cstring" title="newFuture[T](fromProc: string = &quot;unspecified&quot;): owned(Future[T])">newFuture[T](fromProc: string = &quot;unspecified&quot;): owned(Future[T])</a></li>

</ul>
<ul class="simple nested-toc-section">newFutureVar
  <li><a class="reference" href="#newFutureVar%2Cstring" title="newFutureVar[T](fromProc = &quot;unspecified&quot;): owned(FutureVar[T])">newFutureVar[T](fromProc = &quot;unspecified&quot;): owned(FutureVar[T])</a></li>

</ul>
<ul class="simple nested-toc-section">or
  <li><a class="reference" href="#or%2CFuture%5BT%5D%2CFuture%5BY%5D" title="`or`[T, Y](fut1: Future[T]; fut2: Future[Y]): Future[void]">`or`[T, Y](fut1: Future[T]; fut2: Future[Y]): Future[void]</a></li>

</ul>
<ul class="simple nested-toc-section">read
  <li><a class="reference" href="#read_2" title="read(future: Future[void] | FutureVar[void])">read(future: Future[void] | FutureVar[void])</a></li>
<li><a class="reference" href="#read" title="read[T](future: Future[T] | FutureVar[T]): lent T">read[T](future: Future[T] | FutureVar[T]): lent T</a></li>

</ul>
<ul class="simple nested-toc-section">readError
  <li><a class="reference" href="#readError%2CFuture%5BT%5D" title="readError[T](future: Future[T]): ref Exception">readError[T](future: Future[T]): ref Exception</a></li>

</ul>
<ul class="simple nested-toc-section">setCallSoonProc
  <li><a class="reference" href="#setCallSoonProc" title="setCallSoonProc(p: (proc (cbproc: proc ()) {.gcsafe.}))">setCallSoonProc(p: (proc (cbproc: proc ()) {.gcsafe.}))</a></li>

</ul>

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

</ul>

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  <div class="nine columns" id="content">
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L1" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
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  <h1><a class="toc-backref" href="#6">Imports</a></h1>
  <dl class="item">
    <a class="reference external" href="os.html">os</a>, <a class="reference external" href="sets.html">sets</a>, <a class="reference external" href="tables.html">tables</a>, <a class="reference external" href="strutils.html">strutils</a>, <a class="reference external" href="times.html">times</a>, <a class="reference external" href="heapqueue.html">heapqueue</a>, <a class="reference external" href="options.html">options</a>, <a class="reference external" href="deques.html">deques</a>, <a class="reference external" href="cstrutils.html">cstrutils</a>, <a class="reference external" href="typetraits.html">typetraits</a>, <a class="reference external" href="stacktraces.html">stacktraces</a>, <a class="reference external" href="objectdollar.html">objectdollar</a>, <a class="reference external" href="assertions.html">assertions</a>
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<div class="section" id="7">
  <h1><a class="toc-backref" href="#7">Types</a></h1>
  <dl class="item">
    <div id="Future">
  <dt><pre><a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span> <span class="Other">=</span> <span class="Keyword">ref</span> <span class="Keyword">object</span> <span class="Keyword">of</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a>
  <span class="Comment">## Stored value</span></pre></dt>
  <dd>
    
    Typed future.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L37" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
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  </dd>
</div>
<div id="FutureBase">
  <dt><pre><a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a> <span class="Other">=</span> <span class="Keyword">ref</span> <span class="Keyword">object</span> <span class="Keyword">of</span> <a href="system.html#RootObj"><span class="Identifier">RootObj</span></a>
  <span class="Identifier">error</span><span class="Operator">*</span><span class="Other">:</span> <span class="Keyword">ref</span> <a href="system.html#Exception"><span class="Identifier">Exception</span></a>      <span class="Comment">## Stored exception</span>
  <span class="Identifier">errorStackTrace</span><span class="Operator">*</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a>
  <span class="Keyword">when</span> <span class="Keyword">not</span> <span class="Identifier">defined</span><span class="Other">(</span><span class="Identifier">release</span><span class="Other">)</span> <span class="Keyword">or</span> <span class="Identifier">defined</span><span class="Other">(</span><span class="Identifier">futureLogging</span><span class="Other">)</span><span class="Other">:</span>
    <span class="Comment">## For debugging purposes only.</span></pre></dt>
  <dd>
    
    Untyped future.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L26" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
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<div id="FutureError">
  <dt><pre><a href="asyncfutures.html#FutureError"><span class="Identifier">FutureError</span></a> <span class="Other">=</span> <span class="Keyword">object</span> <span class="Keyword">of</span> <a href="system.html#Defect"><span class="Identifier">Defect</span></a>
  <span class="Identifier">cause</span><span class="Operator">*</span><span class="Other">:</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L42" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
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  </dd>
</div>
<div id="FutureVar">
  <dt><pre><a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span> <span class="Other">=</span> <span class="Keyword">distinct</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L40" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L40" 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="isFutureLoggingEnabled">
  <dt><pre><a href="asyncfutures.html#isFutureLoggingEnabled"><span class="Identifier">isFutureLoggingEnabled</span></a> <span class="Other">=</span> <span class="DecNumber">false</span></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L48" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
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  </dd>
</div>
<div id="NimAsyncContinueSuffix">
  <dt><pre><a href="asyncfutures.html#NimAsyncContinueSuffix"><span class="Identifier">NimAsyncContinueSuffix</span></a> <span class="Other">=</span> <span class="StringLit">&quot;NimAsyncContinue&quot;</span></pre></dt>
  <dd>
    
    For internal usage. Do not use.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L51" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L51" 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="$-procs-all">
  <div id="$,seq[StackTraceEntry]">
  <dt><pre><span class="Keyword">proc</span> <a href="#%24%2Cseq%5BStackTraceEntry%5D"><span class="Identifier">`$`</span></a><span class="Other">(</span><span class="Identifier">stackTraceEntries</span><span class="Other">:</span> <a href="system.html#seq"><span class="Identifier">seq</span></a><span class="Other">[</span><a href="system.html#StackTraceEntry"><span class="Identifier">StackTraceEntry</span></a><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">ValueError</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L314" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L314" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="addCallback-procs-all">
  <div id="addCallback,FutureBase,proc)">
  <dt><pre><span class="Keyword">proc</span> <a href="#addCallback%2CFutureBase%2Cproc%29"><span class="Identifier">addCallback</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a><span class="Other">;</span> <span class="Identifier">cb</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Other">)</span> {.<span class="Identifier">closure</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    <p>Adds the callbacks proc to be called when the future completes.</p>
<p>If future has already completed then <tt class="docutils literal"><span class="pre"><span class="Identifier">cb</span></span></tt> will be called immediately.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L249" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L249" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="addCallback,Future[T],proc(Future[T])">
  <dt><pre><span class="Keyword">proc</span> <a href="#addCallback%2CFuture%5BT%5D%2Cproc%28Future%5BT%5D%29"><span class="Identifier">addCallback</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span>
                    <span class="Identifier">cb</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span> {.<span class="Identifier">closure</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Adds the callbacks proc to be called when the future completes.</p>
<p>If future has already completed then <tt class="docutils literal"><span class="pre"><span class="Identifier">cb</span></span></tt> will be called immediately.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L259" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L259" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="all-procs-all">
  <div id="all,varargs[Future[T]]">
  <dt><pre><span class="Keyword">proc</span> <a href="#all%2Cvarargs%5BFuture%5BT%5D%5D"><span class="Identifier">all</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">futs</span><span class="Other">:</span> <a href="system.html#varargs"><span class="Identifier">varargs</span></a><span class="Other">[</span><a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#auto"><span class="Identifier">auto</span></a></pre></dt>
  <dd>
    
    <p>Returns a future which will complete once all futures in <tt class="docutils literal"><span class="pre"><span class="Identifier">futs</span></span></tt> complete. If the argument is empty, the returned future completes immediately.</p>
<p>If the awaited futures are not <tt class="docutils literal"><span class="pre"><span class="Identifier">Future</span><span class="Punctuation">[</span><span class="Identifier">void</span><span class="Punctuation">]</span></span></tt>, the returned future will hold the values of all awaited futures in a sequence.</p>
<p>If the awaited futures <em>are</em> <tt class="docutils literal"><span class="pre"><span class="Identifier">Future</span><span class="Punctuation">[</span><span class="Identifier">void</span><span class="Punctuation">]</span></span></tt>, this proc returns <tt class="docutils literal"><span class="pre"><span class="Identifier">Future</span><span class="Punctuation">[</span><span class="Identifier">void</span><span class="Punctuation">]</span></span></tt>.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L459" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L459" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="and-procs-all">
  <div id="and,Future[T],Future[Y]">
  <dt><pre><span class="Keyword">proc</span> <a href="#and%2CFuture%5BT%5D%2CFuture%5BY%5D"><span class="Identifier">`and`</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">,</span> <span class="Identifier">Y</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">fut1</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">fut2</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">Y</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span></pre></dt>
  <dd>
    
    Returns a future which will complete once both <tt class="docutils literal"><span class="pre"><span class="Identifier">fut1</span></span></tt> and <tt class="docutils literal"><span class="pre"><span class="Identifier">fut2</span></span></tt> complete.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L431" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L431" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="asyncCheck-procs-all">
  <div id="asyncCheck,Future[T]">
  <dt><pre><span class="Keyword">proc</span> <a href="#asyncCheck%2CFuture%5BT%5D"><span class="Identifier">asyncCheck</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Sets a callback on <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt> which raises an exception if the future finished with an error.</p>
<p>This should be used instead of <tt class="docutils literal"><span class="pre"><span class="Keyword">discard</span></span></tt> to discard void futures, or use <tt class="docutils literal"><span class="pre"><span class="Identifier">waitFor</span></span></tt> if you need to wait for the future's completion.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L416" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L416" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="callback=-procs-all">
  <div id="callback=,FutureBase,proc)">
  <dt><pre><span class="Keyword">proc</span> <a href="#callback%3D%2CFutureBase%2Cproc%29"><span class="Identifier">callback=</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a><span class="Other">;</span> <span class="Identifier">cb</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Other">)</span> {.<span class="Identifier">closure</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    <p>Clears the list of callbacks and sets the callback proc to be called when the future completes.</p>
<p>If future has already completed then <tt class="docutils literal"><span class="pre"><span class="Identifier">cb</span></span></tt> will be called immediately.</p>
<p>It's recommended to use <tt class="docutils literal"><span class="pre"><span class="Identifier">addCallback</span></span></tt> or <tt class="docutils literal"><span class="pre"><span class="Identifier">then</span></span></tt> instead.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L269" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L269" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="callback=,Future[T],proc(Future[T])">
  <dt><pre><span class="Keyword">proc</span> <a href="#callback%3D%2CFuture%5BT%5D%2Cproc%28Future%5BT%5D%29"><span class="Identifier">callback=</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span>
                  <span class="Identifier">cb</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span> {.<span class="Identifier">closure</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Sets the callback proc to be called when the future completes.</p>
<p>If future has already completed then <tt class="docutils literal"><span class="pre"><span class="Identifier">cb</span></span></tt> will be called immediately.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L278" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L278" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="callSoon-procs-all">
  <div id="callSoon,proc)">
  <dt><pre><span class="Keyword">proc</span> <a href="#callSoon%2Cproc%29"><span class="Identifier">callSoon</span></a><span class="Other">(</span><span class="Identifier">cbproc</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">]</span><span class="Other">,</span>
    <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    <p>Call <tt class="docutils literal"><span class="pre"><span class="Identifier">cbproc</span></span></tt> &quot;soon&quot;.</p>
<p>If async dispatcher is running, <tt class="docutils literal"><span class="pre"><span class="Identifier">cbproc</span></span></tt> will be executed during next dispatcher tick.</p>
<p>If async dispatcher is not running, <tt class="docutils literal"><span class="pre"><span class="Identifier">cbproc</span></span></tt> will be executed immediately.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L100" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L100" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="clean-procs-all">
  <div id="clean,FutureVar[T]">
  <dt><pre><span class="Keyword">proc</span> <a href="#clean%2CFutureVar%5BT%5D"><span class="Identifier">clean</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    Resets the <tt class="docutils literal"><span class="pre"><span class="Identifier">finished</span></span></tt> status of <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L139" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L139" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="clearCallbacks-procs-all">
  <div id="clearCallbacks,FutureBase">
  <dt><pre><span class="Keyword">proc</span> <a href="#clearCallbacks%2CFutureBase"><span class="Identifier">clearCallbacks</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L245" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L245" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="complete-procs-all">
  <div id="complete,Future[void]">
  <dt><pre><span class="Keyword">proc</span> <a href="#complete%2CFuture%5Bvoid%5D"><span class="Identifier">complete</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">val</span> <span class="Other">=</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span><span class="Other">.</span><span class="Identifier">default</span><span class="Other">)</span> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L210" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L210" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="complete,Future[T],sinkT">
  <dt><pre><span class="Keyword">proc</span> <a href="#complete%2CFuture%5BT%5D%2CsinkT"><span class="Identifier">complete</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <a href="system.html#sink"><span class="Identifier">sink</span></a> <span class="Identifier">T</span><span class="Other">)</span></pre></dt>
  <dd>
    
    Completes <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt> with value <tt class="docutils literal"><span class="pre"><span class="Identifier">val</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L206" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L206" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="complete,FutureVar[T]">
  <dt><pre><span class="Keyword">proc</span> <a href="#complete%2CFutureVar%5BT%5D"><span class="Identifier">complete</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    Completes a <tt class="docutils literal"><span class="pre"><span class="Identifier">FutureVar</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L213" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L213" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="complete,FutureVar[T],sinkT">
  <dt><pre><span class="Keyword">proc</span> <a href="#complete%2CFutureVar%5BT%5D%2CsinkT"><span class="Identifier">complete</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">val</span><span class="Other">:</span> <a href="system.html#sink"><span class="Identifier">sink</span></a> <span class="Identifier">T</span><span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Completes a <tt class="docutils literal"><span class="pre"><span class="Identifier">FutureVar</span></span></tt> with value <tt class="docutils literal"><span class="pre"><span class="Identifier">val</span></span></tt>.</p>
<p>Any previously stored value will be overwritten.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L222" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L222" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="fail-procs-all">
  <div id="fail,Future[T],ref.Exception">
  <dt><pre><span class="Keyword">proc</span> <a href="#fail%2CFuture%5BT%5D%2Cref.Exception"><span class="Identifier">fail</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">error</span><span class="Other">:</span> <span class="Keyword">ref</span> <a href="system.html#Exception"><span class="Identifier">Exception</span></a><span class="Other">)</span></pre></dt>
  <dd>
    
    Completes <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt> with <tt class="docutils literal"><span class="pre"><span class="Identifier">error</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L234" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L234" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="failed-procs-all">
  <div id="failed,FutureBase">
  <dt><pre><span class="Keyword">proc</span> <a href="#failed%2CFutureBase"><span class="Identifier">failed</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#bool"><span class="Identifier">bool</span></a> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Determines whether <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt> completed with an error.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L412" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L412" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="finished-procs-all">
  <div id="finished">
  <dt><pre><span class="Keyword">proc</span> <a href="#finished"><span class="Identifier">finished</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureBase"><span class="Identifier">FutureBase</span></a> <span class="Operator">|</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#bool"><span class="Identifier">bool</span></a></pre></dt>
  <dd>
    
    <p>Determines whether <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt> has completed.</p>
<p><tt class="docutils literal"><span class="pre"><span class="Identifier">True</span></span></tt> may indicate an error or a value. Use <tt class="docutils literal"><span class="pre"><span class="Identifier">failed</span></span></tt> to distinguish.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L403" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L403" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="getCallSoonProc-procs-all">
  <div id="getCallSoonProc">
  <dt><pre><span class="Keyword">proc</span> <a href="#getCallSoonProc"><span class="Identifier">getCallSoonProc</span></a><span class="Other">(</span><span class="Other">)</span><span class="Other">:</span> <span class="Other">(</span><span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">cbproc</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Other">)</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span>
    <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Get current implementation of <tt class="docutils literal"><span class="pre"><span class="Identifier">callSoon</span></span></tt>.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L92" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L92" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="mget-procs-all">
  <div id="mget,FutureVar[T]">
  <dt><pre><span class="Keyword">proc</span> <a href="#mget%2CFutureVar%5BT%5D"><span class="Identifier">mget</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <span class="Keyword">var</span> <span class="Identifier">T</span></pre></dt>
  <dd>
    
    <p>Returns a mutable value stored in <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt>.</p>
<p>Unlike <tt class="docutils literal"><span class="pre"><span class="Identifier">read</span></span></tt>, this function will not raise an exception if the Future has not been finished.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L396" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L396" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="newFuture-procs-all">
  <div id="newFuture,string">
  <dt><pre><span class="Keyword">proc</span> <a href="#newFuture%2Cstring"><span class="Identifier">newFuture</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">fromProc</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a> <span class="Other">=</span> <span class="StringLit">&quot;unspecified&quot;</span><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">owned</span><span class="Other">(</span><a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Creates a new future.</p>
<p>Specifying <tt class="docutils literal"><span class="pre"><span class="Identifier">fromProc</span></span></tt>, which is a string specifying the name of the proc that this future belongs to, is a good habit as it helps with debugging.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L121" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L121" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="newFutureVar-procs-all">
  <div id="newFutureVar,string">
  <dt><pre><span class="Keyword">proc</span> <a href="#newFutureVar%2Cstring"><span class="Identifier">newFutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">fromProc</span> <span class="Other">=</span> <span class="StringLit">&quot;unspecified&quot;</span><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">owned</span><span class="Other">(</span><a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    <p>Create a new <tt class="docutils literal"><span class="pre"><span class="Identifier">FutureVar</span></span></tt>. This Future type is ideally suited for situations where you want to avoid unnecessary allocations of Futures.</p>
<p>Specifying <tt class="docutils literal"><span class="pre"><span class="Identifier">fromProc</span></span></tt>, which is a string specifying the name of the proc that this future belongs to, is a good habit as it helps with debugging.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L129" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L129" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="or-procs-all">
  <div id="or,Future[T],Future[Y]">
  <dt><pre><span class="Keyword">proc</span> <a href="#or%2CFuture%5BT%5D%2CFuture%5BY%5D"><span class="Identifier">`or`</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">,</span> <span class="Identifier">Y</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">fut1</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">fut2</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">Y</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span></pre></dt>
  <dd>
    
    Returns a future which will complete once either <tt class="docutils literal"><span class="pre"><span class="Identifier">fut1</span></span></tt> or <tt class="docutils literal"><span class="pre"><span class="Identifier">fut2</span></span></tt> complete.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L447" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L447" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="read-procs-all">
  <div id="read_2">
  <dt><pre><span class="Keyword">proc</span> <a href="#read_2"><span class="Identifier">read</span></a><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span> <span class="Operator">|</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span><span class="Other">)</span></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L384" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L384" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="read">
  <dt><pre><span class="Keyword">proc</span> <a href="#read"><span class="Identifier">read</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span> <span class="Operator">|</span> <a href="asyncfutures.html#FutureVar"><span class="Identifier">FutureVar</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#lent"><span class="Identifier">lent</span></a> <span class="Identifier">T</span></pre></dt>
  <dd>
    
    <p>Retrieves the value of <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt>. Future must be finished otherwise this function will fail with a <tt class="docutils literal"><span class="pre"><span class="Identifier">ValueError</span></span></tt> exception.</p>
<p>If the result of the future is an error then that error will be raised.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L377" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L377" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="readError-procs-all">
  <div id="readError,Future[T]">
  <dt><pre><span class="Keyword">proc</span> <a href="#readError%2CFuture%5BT%5D"><span class="Identifier">readError</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">(</span><span class="Identifier">future</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><span class="Identifier">T</span><span class="Other">]</span><span class="Other">)</span><span class="Other">:</span> <span class="Keyword">ref</span> <a href="system.html#Exception"><span class="Identifier">Exception</span></a></pre></dt>
  <dd>
    
    <p>Retrieves the exception stored in <tt class="docutils literal"><span class="pre"><span class="Identifier">future</span></span></tt>.</p>
<p>An <tt class="docutils literal"><span class="pre"><span class="Identifier">ValueError</span></span></tt> exception will be thrown if no exception exists in the specified Future.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L387" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L387" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="setCallSoonProc-procs-all">
  <div id="setCallSoonProc">
  <dt><pre><span class="Keyword">proc</span> <a href="#setCallSoonProc"><span class="Identifier">setCallSoonProc</span></a><span class="Other">(</span><span class="Identifier">p</span><span class="Other">:</span> <span class="Other">(</span><span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">cbproc</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Other">)</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span>
    <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Change current implementation of <tt class="docutils literal"><span class="pre"><span class="Identifier">callSoon</span></span></tt>. This is normally called when dispatcher from <tt class="docutils literal"><span class="pre"><span class="Identifier">asyncdispatcher</span></span></tt> is initialized.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asyncfutures.nim#L96" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asyncfutures.nim#L96" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>

  </dl>
</div>

  </div>
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