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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.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">OpenGL-2.2.3.0: A binding for the OpenGL graphics system</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Portability</th><td>portable</td></tr><tr><th>Stability</th><td>stable</td></tr><tr><th>Maintainer</th><td>sven.panne@aedion.de</td></tr></table><p class="caption">Graphics.Rendering.OpenGL.GL.StateVar</p></div><div id="description"><p class="caption">Description</p><div class="doc empty"> </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"><span class="keyword">class</span> <a href="#t:HasGetter">HasGetter</a> g <span class="keyword">where</span><ul class="subs"><li><a href="#v:get">get</a> :: g a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a</li></ul></li><li class="src short"><span class="keyword">data</span> <a href="#t:GettableStateVar">GettableStateVar</a> a</li><li class="src short"><a href="#v:makeGettableStateVar">makeGettableStateVar</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a -> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:GettableStateVar">GettableStateVar</a> a</li><li class="src short"><span class="keyword">class</span> <a href="#t:HasSetter">HasSetter</a> s <span class="keyword">where</span><ul class="subs"><li><a href="#v:-36--61-">($=)</a> :: s a -> a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li></ul></li><li class="src short"><a href="#v:set">set</a> :: [<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>] -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:SettableStateVar">SettableStateVar</a> a</li><li class="src short"><a href="#v:makeSettableStateVar">makeSettableStateVar</a> :: (a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:SettableStateVar">SettableStateVar</a> a</li><li class="src short"><span class="keyword">data</span> <a href="#t:StateVar">StateVar</a> a</li><li class="src short"><a href="#v:makeStateVar">makeStateVar</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a -> (a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> a</li><li class="src short"><a href="#v:-36--126-">($~)</a> :: (<a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> v, <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> v) => v a -> (a -> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:-36--61--33-">($=!)</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> s => s a -> a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:-36--126--33-">($~!)</a> :: (<a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> v, <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> v) => v a -> (a -> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:HasGetter" class="def">HasGetter</a> g <span class="keyword">where</span><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#HasGetter" class="link">Source</a></p><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:get" class="def">get</a> :: g a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a<a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#get" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:HasGetter" class="caption collapser" onclick="toggleSection('i:HasGetter')">Instances</p><div id="section.i:HasGetter" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-IORef.html#t:IORef">IORef</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:GettableStateVar">GettableStateVar</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:GettableStateVar" class="def">GettableStateVar</a> a <a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#GettableStateVar" class="link">Source</a></p><div class="subs instances"><p id="control.i:GettableStateVar" class="caption collapser" onclick="toggleSection('i:GettableStateVar')">Instances</p><div id="section.i:GettableStateVar" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:GettableStateVar">GettableStateVar</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:makeGettableStateVar" class="def">makeGettableStateVar</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a -> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:GettableStateVar">GettableStateVar</a> a<a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#makeGettableStateVar" class="link">Source</a></p></div><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:HasSetter" class="def">HasSetter</a> s <span class="keyword">where</span><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#HasSetter" class="link">Source</a></p><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:-36--61-" class="def">($=)</a> :: s a -> a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#%24%3D" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:HasSetter" class="caption collapser" onclick="toggleSection('i:HasSetter')">Instances</p><div id="section.i:HasSetter" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-IORef.html#t:IORef">IORef</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:SettableStateVar">SettableStateVar</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:set" class="def">set</a> :: [<a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>] -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#set" class="link">Source</a></p></div><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:SettableStateVar" class="def">SettableStateVar</a> a <a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#SettableStateVar" class="link">Source</a></p><div class="subs instances"><p id="control.i:SettableStateVar" class="caption collapser" onclick="toggleSection('i:SettableStateVar')">Instances</p><div id="section.i:SettableStateVar" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:SettableStateVar">SettableStateVar</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:makeSettableStateVar" class="def">makeSettableStateVar</a> :: (a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:SettableStateVar">SettableStateVar</a> a<a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#makeSettableStateVar" class="link">Source</a></p></div><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:StateVar" class="def">StateVar</a> a <a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#StateVar" class="link">Source</a></p><div class="subs instances"><p id="control.i:StateVar" class="caption collapser" onclick="toggleSection('i:StateVar')">Instances</p><div id="section.i:StateVar" class="show"><table><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:makeStateVar" class="def">makeStateVar</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> a -> (a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a>) -> <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> a<a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#makeStateVar" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:-36--126-" class="def">($~)</a> :: (<a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> v, <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> v) => v a -> (a -> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#%24~" class="link">Source</a></p><div class="doc"><p>A modificator convenience function.
</p></div></div><div class="top"><p class="src"><a name="v:-36--61--33-" class="def">($=!)</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> s => s a -> a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#%24%3D%21" class="link">Source</a></p><div class="doc"><p>A strict variant of <code><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#v:-36--61-">$=</a></code>.
</p></div></div><div class="top"><p class="src"><a name="v:-36--126--33-" class="def">($~!)</a> :: (<a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasGetter">HasGetter</a> v, <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:HasSetter">HasSetter</a> v) => v a -> (a -> a) -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-StateVar.html#%24~%21" class="link">Source</a></p><div class="doc"><p>A strict variant of <code><a href="Graphics-Rendering-OpenGL-GL-StateVar.html#v:-36--126-">$~</a></code>.
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