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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">ghc-7.4.2: The GHC API</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Safe Haskell</th><td>None</td></tr></table><p class="caption">Vectorise.Generic.PADict</p></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><a href="#v:buildPADict">buildPADict</a> :: <a href="TyCon.html#t:TyCon">TyCon</a> -&gt; <a href="TyCon.html#t:TyCon">TyCon</a> -&gt; <a href="TyCon.html#t:TyCon">TyCon</a> -&gt; <a href="TyCon.html#t:TyCon">TyCon</a> -&gt; <a href="Vectorise-Generic-Description.html#t:SumRepr">SumRepr</a> -&gt; <a href="Vectorise-Monad-Base.html#t:VM">VM</a> <a href="Var.html#t:Var">Var</a></li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><a name="v:buildPADict" class="def">buildPADict</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="TyCon.html#t:TyCon">TyCon</a></td><td class="doc"><p>tycon of the type being vectorised.
</p></td></tr><tr><td class="src">-&gt; <a href="TyCon.html#t:TyCon">TyCon</a></td><td class="doc"><p>tycon of the type used for the vectorised representation.
</p></td></tr><tr><td class="src">-&gt; <a href="TyCon.html#t:TyCon">TyCon</a></td><td class="doc"><p>PData  instance tycon
</p></td></tr><tr><td class="src">-&gt; <a href="TyCon.html#t:TyCon">TyCon</a></td><td class="doc"><p>PDatas instance tycon
</p></td></tr><tr><td class="src">-&gt; <a href="Vectorise-Generic-Description.html#t:SumRepr">SumRepr</a></td><td class="doc"><p>representation used for the type being vectorised.
</p></td></tr><tr><td class="src">-&gt; <a href="Vectorise-Monad-Base.html#t:VM">VM</a> <a href="Var.html#t:Var">Var</a></td><td class="doc"><p>name of the top-level dictionary function.
</p></td></tr></table></div><div class="doc"><p>Build the PA dictionary function for some type and hoist it to top level.
</p><p>The PA dictionary holds fns that convert values to and from their vectorised representations.
</p><pre>Recall the definition:
    class class PR (PRepr a) =&gt; PA a where
      toPRepr      :: a -&gt; PRepr a
      fromPRepr    :: PRepr a -&gt; a
      toArrPRepr   :: PData a -&gt; PData (PRepr a)
      fromArrPRepr :: PData (PRepr a) -&gt; PData a

Example:
    df :: forall a. PA a -&gt; PA (T a)
    df = /a. (d:PA a). MkPA ($PR_df a d) ($toPRepr a d) ... 
    $dPR_df :: forall a. PA a -&gt; PR (PRepr (T a))
    $dPR_df = ....   
    $toRepr :: forall a. PA a -&gt; T a -&gt; PRepr (T a)
    $toPRepr = ...
 The <a href="---.html">...</a> stuff is filled in by buildPAScAndMethods
</pre></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.11.0</p></div></body></html>