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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>GHC.SYB.Utils</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
window.onload = function () {pageLoad();setSynopsis("mini_GHC-SYB-Utils.html");};
//]]>
</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/GHC-SYB-Utils.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">ghc-syb-utils-0.2.1.1: Scrap Your Boilerplate utilities for 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">GHC.SYB.Utils</p></div><div id="description"><p class="caption">Description</p><div class="doc"><p><a href="GHC-Syb-Utils.html">GHC.Syb.Utils</a> provides common utilities for the Ghc Api,
     either based on Data/Typeable or for use with Data.Generics
     over Ghc Api types.
</p><p>example output of <code><a href="GHC-SYB-Utils.html#v:showData">showData</a></code> on <code><a href="/usr/share/doc/ghc-doc/html/libraries/ghc-7.6.3/GHC.html#v:parsedSource">parsedSource</a></code>, <code><a href="/usr/share/doc/ghc-doc/html/libraries/ghc-7.6.3/GHC.html#v:renamedSource">renamedSource</a></code>, and
<code><a href="/usr/share/doc/ghc-doc/html/libraries/ghc-7.6.3/GHC.html#v:typecheckedSource">typecheckedSource</a></code> for a trivial <code>HelloWorld</code> module, compared with
<code><a href="/usr/share/doc/ghc-doc/html/libraries/ghc-7.6.3/Outputable.html#v:ppr">ppr</a></code> output:
</p><pre>
------------------------- pretty-printed parsedSource
module HelloWorld where
main = putStrLn <a href="Hello, World!.html">Hello, World!</a>
------------------------- pretty-printed renamedSource
Just (HelloWorld.main = System.IO.putStrLn <a href="Hello, World!.html">Hello, World!</a>,
      [import Prelude],
      Nothing,
      Nothing,

(HaddockModInfo
 (Nothing)
 (Nothing)
 (Nothing)
 (Nothing)))
------------------------- pretty-printed typecheckedSource
Just &lt;AbsBinds [] [] [HelloWorld.main &lt;= [] main]
        HelloWorld.main :: GHC.IOBase.IO ()
        []
        { main = System.IO.putStrLn <a href="Hello, World!.html">Hello, World!</a> }&gt;
------------------------- shown parsedSource

(L {HelloWorld.hs:1:0}
 (HsModule
  (Just
   (L {HelloWorld.hs:1:7-16} {ModuleName: HelloWorld}))
  (Nothing)
  []
  [
   (L {HelloWorld.hs:2:0-30}
    (ValD
     (FunBind
      (L {HelloWorld.hs:2:0-3}
       (Unqual {OccName: main}))
      (False)
      (MatchGroup
       [
        (L {HelloWorld.hs:2:0-30}
         (Match
          []
          (Nothing)
          (GRHSs
           [
            (L {HelloWorld.hs:2:7-30}
             (GRHS
              []
              (L {HelloWorld.hs:2:7-30}
               (HsApp
                (L {HelloWorld.hs:2:7-14}
                 (HsVar
                  (Unqual {OccName: putStrLn})))
                (L {HelloWorld.hs:2:16-30}
                 (HsLit
                  (HsString {FastString: <a href="Hello, World!.html">Hello, World!</a>})))))))]
           (EmptyLocalBinds))))] {!type placeholder here?!})
      (WpHole) {!NameSet placeholder here!}
      (Nothing))))]
  (Nothing)
  (HaddockModInfo
   (Nothing)
   (Nothing)
   (Nothing)
   (Nothing))
  (Nothing)))
------------------------- shown renamedSource

((,,,,)
 (HsGroup
  (ValBindsOut
   [
    ((,)
     (NonRecursive) {Bag(Located (HsBind Name)):
     [
      (L {HelloWorld.hs:2:0-30}
       (FunBind
        (L {HelloWorld.hs:2:0-3} {Name: HelloWorld.main})
        (False)
        (MatchGroup
         [
          (L {HelloWorld.hs:2:0-30}
           (Match
            []
            (Nothing)
            (GRHSs
             [
              (L {HelloWorld.hs:2:7-30}
               (GRHS
                []
                (L {HelloWorld.hs:2:7-30}
                 (HsApp
                  (L {HelloWorld.hs:2:7-14}
                   (HsVar {Name: System.IO.putStrLn}))
                  (L {HelloWorld.hs:2:16-30}
                   (HsLit
                    (HsString {FastString: <a href="Hello, World!.html">Hello, World!</a>})))))))]
             (EmptyLocalBinds))))] {!type placeholder here?!})
        (WpHole) {NameSet:
        [{Name: System.IO.putStrLn}]}
        (Nothing)))]})]
   [])
  []
  []
  []
  []
  []
  []
  []
  []
  [])
 [
  (L {Implicit import declaration}
   (ImportDecl
    (L {Implicit import declaration} {ModuleName: Prelude})
    (False)
    (False)
    (Nothing)
    (Nothing)))]
 (Nothing)
 (Nothing)
 (HaddockModInfo
  (Nothing)
  (Nothing)
  (Nothing)
  (Nothing)))
------------------------- shown typecheckedSource
{Bag(Located (HsBind Var)):
[
 (L {HelloWorld.hs:2:0-30}
  (AbsBinds
   []
   []
   [
    ((,,,)
     [] {Var: HelloWorld.main} {Var: main}
     [])] {Bag(Located (HsBind Var)):
   [
    (L {HelloWorld.hs:2:0-30}
     (FunBind
      (L {HelloWorld.hs:2:0-3} {Var: main})
      (False)
      (MatchGroup
       [
        (L {HelloWorld.hs:2:0-30}
         (Match
          []
          (Nothing)
          (GRHSs
           [
            (L {HelloWorld.hs:2:7-30}
             (GRHS
              []
              (L {HelloWorld.hs:2:7-30}
               (HsApp
                (L {HelloWorld.hs:2:7-14}
                 (HsVar {Var: System.IO.putStrLn}))
                (L {HelloWorld.hs:2:16-30}
                 (HsLit
                  (HsString {FastString: <a href="Hello, World!.html">Hello, World!</a>})))))))]
           (EmptyLocalBinds))))] GHC.IOBase.IO ())
      (WpHole) {!NameSet placeholder here!}
      (Nothing)))]}))]}
</pre></div></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:showSDoc_">showSDoc_</a> :: <a href="/usr/share/doc/ghc-doc/html/libraries/ghc-7.6.3/Outputable.html#t:SDoc">SDoc</a> -&gt; <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-String.html#t:String">String</a></li><li class="src short"><span class="keyword">data</span>  <a href="#t:Stage">Stage</a> <ul class="subs"><li>= <a href="#v:Parser">Parser</a>  </li><li>| <a href="#v:Renamer">Renamer</a>  </li><li>| <a href="#v:TypeChecker">TypeChecker</a>  </li></ul></li><li class="src short"><a href="#v:showData">showData</a> :: <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Data.html#t:Data">Data</a> a =&gt; <a href="GHC-SYB-Utils.html#t:Stage">Stage</a> -&gt; <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Int.html#t:Int">Int</a> -&gt; a -&gt; <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-String.html#t:String">String</a></li><li class="src short"><a href="#v:everythingStaged">everythingStaged</a> ::  <a href="GHC-SYB-Utils.html#t:Stage">Stage</a> -&gt; (r -&gt; r -&gt; r) -&gt; r -&gt; <a href="/usr/share/doc/libghc-syb-doc/html/Data-Generics-Aliases.html#t:GenericQ">GenericQ</a> r -&gt; <a href="/usr/share/doc/libghc-syb-doc/html/Data-Generics-Aliases.html#t:GenericQ">GenericQ</a> r</li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><a name="v:showSDoc_" class="def">showSDoc_</a> :: <a href="/usr/share/doc/ghc-doc/html/libraries/ghc-7.6.3/Outputable.html#t:SDoc">SDoc</a> -&gt; <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-String.html#t:String">String</a><a href="src/GHC-SYB-Utils.html#showSDoc_" class="link">Source</a></p></div><div class="top"><p class="src"><span class="keyword">data</span>  <a name="t:Stage" class="def">Stage</a>  <a href="src/GHC-SYB-Utils.html#Stage" class="link">Source</a></p><div class="doc"><p>Ghc Ast types tend to have undefined holes, to be filled
   by later compiler phases. We tag Asts with their source,
   so that we can avoid such holes based on who generated the Asts.
</p></div><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a name="v:Parser" class="def">Parser</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a name="v:Renamer" class="def">Renamer</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a name="v:TypeChecker" class="def">TypeChecker</a></td><td class="doc empty">&nbsp;</td></tr></table></div><div class="subs instances"><p id="control.i:Stage" class="caption collapser" onclick="toggleSection('i:Stage')">Instances</p><div id="section.i:Stage" class="show"><table><tr><td class="src"><a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Eq.html#t:Eq">Eq</a> <a href="GHC-SYB-Utils.html#t:Stage">Stage</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Ord.html#t:Ord">Ord</a> <a href="GHC-SYB-Utils.html#t:Stage">Stage</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Text-Show.html#t:Show">Show</a> <a href="GHC-SYB-Utils.html#t:Stage">Stage</a></td><td class="doc empty">&nbsp;</td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:showData" class="def">showData</a> :: <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Data.html#t:Data">Data</a> a =&gt; <a href="GHC-SYB-Utils.html#t:Stage">Stage</a> -&gt; <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Int.html#t:Int">Int</a> -&gt; a -&gt; <a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-String.html#t:String">String</a><a href="src/GHC-SYB-Utils.html#showData" class="link">Source</a></p><div class="doc"><p>Generic Data-based show, with special cases for GHC Ast types,
   and simplistic indentation-based layout (the <code><a href="/usr/share/doc/ghc-doc/html/libraries/base-4.6.0.1/Data-Int.html#t:Int">Int</a></code> parameter); 
   showing abstract types abstractly and avoiding known potholes 
   (based on the <code><a href="GHC-SYB-Utils.html#t:Stage">Stage</a></code> that generated the Ast)
</p></div></div><div class="top"><p class="src"><a name="v:everythingStaged" class="def">everythingStaged</a> ::  <a href="GHC-SYB-Utils.html#t:Stage">Stage</a> -&gt; (r -&gt; r -&gt; r) -&gt; r -&gt; <a href="/usr/share/doc/libghc-syb-doc/html/Data-Generics-Aliases.html#t:GenericQ">GenericQ</a> r -&gt; <a href="/usr/share/doc/libghc-syb-doc/html/Data-Generics-Aliases.html#t:GenericQ">GenericQ</a> r<a href="src/GHC-SYB-Utils.html#everythingStaged" class="link">Source</a></p><div class="doc"><p>Like <code><a href="/usr/share/doc/libghc-syb-doc/html/Data-Generics-Schemes.html#v:everything">everything</a></code>, but avoid known potholes, based on the <code><a href="GHC-SYB-Utils.html#t:Stage">Stage</a></code> that
   generated the Ast.
</p></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.13.2</p></div></body></html>

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