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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>Servant.Utils.Links</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[
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window.onload = function () {pageLoad();setSynopsis("mini_Servant-Utils-Links.html");};
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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Servant-Utils-Links.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">servant-0.2: A family of combinators for defining webservices APIs and serving them</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Safe Haskell</th><td>None</td></tr><tr><th>Language</th><td>Haskell2010</td></tr></table><p class="caption">Servant.Utils.Links</p></div><div id="description"><p class="caption">Description</p><div class="doc"><p>Type safe internal links.</p><p>Provides the function <code><a href="Servant-Utils-Links.html#v:mkLink">mkLink</a></code>:</p><pre> type API = Proxy ("hello" :> Get Int
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:<a href="|">|</a> "bye" :> QueryParam "name" String :> Post Bool)
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api :: API
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api = proxy
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link1 :: Proxy ("hello" :> Get Int)
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link1 = proxy
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link2 :: Proxy ("hello" :> Delete)
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link2 = proxy
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mkLink link1 API -- typechecks, returns 'Link "/hello"'
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mkLink link2 API -- doesn't typecheck
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</pre><p>That is, <code><a href="Servant-Utils-Links.html#v:mkLink">mkLink</a></code> takes two arguments, a link proxy and a sitemap, and
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returns a <code><a href="Servant-Utils-Links.html#t:Link">Link</a></code>, but only typechecks if the link proxy is a valid link,
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and part of the sitemap.</p><p><strong>N.B.:</strong> <code><a href="Servant-Utils-Links.html#v:mkLink">mkLink</a></code> assumes a capture matches any string (without slashes).</p></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">type family</span> <a href="#t:Or">Or</a> a b</li><li class="src short"><span class="keyword">type family</span> <a href="#t:And">And</a> a b</li><li class="src short"><span class="keyword">type family</span> <a href="#t:IsElem">IsElem</a> a s</li><li class="src short"><span class="keyword">type family</span> <a href="#t:IsLink-39--39-">IsLink''</a> l</li><li class="src short"><span class="keyword">type family</span> <a href="#t:IsLink-39-">IsLink'</a> e</li><li class="src short"><span class="keyword">type family</span> <a href="#t:IsLink">IsLink</a> e</li><li class="src short"><span class="keyword">class</span> <a href="#t:ValidLinkIn">ValidLinkIn</a> f s <span class="keyword">where</span><ul class="subs"><li><a href="#v:mkLink">mkLink</a> :: f -> s -> <a href="Servant-Utils-Links.html#t:Link">Link</a></li></ul></li><li class="src short"><span class="keyword">data</span> <a href="#t:Link">Link</a> = <a href="#v:Link">Link</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-String.html#t:String">String</a></li><li class="src short"><span class="keyword">class</span> <a href="#t:VLinkHelper">VLinkHelper</a> f <span class="keyword">where</span><ul class="subs"><li><a href="#v:vlh">vlh</a> :: <span class="keyword">forall</span> proxy. proxy f -> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-String.html#t:String">String</a></li></ul></li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><span class="keyword">type family</span> <a name="t:Or" class="def">Or</a> a b <a href="src/Servant-Utils-Links.html#Or" class="link">Source</a></p><div class="subs equations"><p class="caption">Equations</p><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:Or">Or</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a> = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:Or">Or</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a> b = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:Or">Or</a> a <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a> = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a></td><td class="doc empty"> </td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">type family</span> <a name="t:And" class="def">And</a> a b <a href="src/Servant-Utils-Links.html#And" class="link">Source</a></p><div class="subs equations"><p class="caption">Equations</p><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:And">And</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a> = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:And">And</a> a <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a> = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:And">And</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a> b = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a></td><td class="doc empty"> </td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">type family</span> <a name="t:IsElem" class="def">IsElem</a> a s <a href="src/Servant-Utils-Links.html#IsElem" class="link">Source</a></p><div class="subs equations"><p class="caption">Equations</p><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> e (sa <a href="Servant-API-Alternative.html#t::-60--124--62-">:<|></a> sb) = <a href="Servant-Utils-Links.html#t:Or">Or</a> (<a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> e sa) (<a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> e sb)</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> (e <a href="Servant-API-Sub.html#t::-62-">:></a> sa) (e <a href="Servant-API-Sub.html#t::-62-">:></a> sb) = <a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> sa sb</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> (e <a href="Servant-API-Sub.html#t::-62-">:></a> sa) (<a href="Servant-API-Capture.html#t:Capture">Capture</a> x y <a href="Servant-API-Sub.html#t::-62-">:></a> sb) = <a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> sa sb</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> sa (<a href="Servant-API-ReqBody.html#t:ReqBody">ReqBody</a> x <a href="Servant-API-Sub.html#t::-62-">:></a> sb) = <a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> sa sb</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> sa (<a href="Servant-API-QueryParam.html#t:QueryParam">QueryParam</a> x y <a href="Servant-API-Sub.html#t::-62-">:></a> sb) = <a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> sa sb</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> e e = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> e a = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a></td><td class="doc empty"> </td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">type family</span> <a name="t:IsLink-39--39-" class="def">IsLink''</a> l <a href="src/Servant-Utils-Links.html#IsLink%27%27" class="link">Source</a></p><div class="subs equations"><p class="caption">Equations</p><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> (e <a href="Servant-API-Sub.html#t::-62-">:></a> <a href="Servant-API-Get.html#t:Get">Get</a> x) = <a href="Servant-Utils-Links.html#t:IsLink-39-">IsLink'</a> e</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> (e <a href="Servant-API-Sub.html#t::-62-">:></a> <a href="Servant-API-Post.html#t:Post">Post</a> x) = <a href="Servant-Utils-Links.html#t:IsLink-39-">IsLink'</a> e</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> (e <a href="Servant-API-Sub.html#t::-62-">:></a> <a href="Servant-API-Put.html#t:Put">Put</a> x) = <a href="Servant-Utils-Links.html#t:IsLink-39-">IsLink'</a> e</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> (e <a href="Servant-API-Sub.html#t::-62-">:></a> <a href="Servant-API-Delete.html#t:Delete">Delete</a>) = <a href="Servant-Utils-Links.html#t:IsLink-39-">IsLink'</a> e</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> a = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:False">False</a></td><td class="doc empty"> </td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">type family</span> <a name="t:IsLink-39-" class="def">IsLink'</a> e <a href="src/Servant-Utils-Links.html#IsLink%27" class="link">Source</a></p><div class="subs equations"><p class="caption">Equations</p><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink-39-">IsLink'</a> (f :: <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/GHC-TypeLits.html#t:Symbol">Symbol</a>) = <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a></td><td class="doc empty"> </td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">type family</span> <a name="t:IsLink" class="def">IsLink</a> e <a href="src/Servant-Utils-Links.html#IsLink" class="link">Source</a></p><div class="subs equations"><p class="caption">Equations</p><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:IsLink">IsLink</a> (a <a href="Servant-API-Sub.html#t::-62-">:></a> b) = <a href="Servant-Utils-Links.html#t:Or">Or</a> (<a href="Servant-Utils-Links.html#t:And">And</a> (<a href="Servant-Utils-Links.html#t:IsLink-39-">IsLink'</a> a) (<a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> b)) (<a href="Servant-Utils-Links.html#t:IsLink-39--39-">IsLink''</a> (a <a href="Servant-API-Sub.html#t::-62-">:></a> b))</td><td class="doc empty"> </td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:ValidLinkIn" class="def">ValidLinkIn</a> f s <span class="keyword">where</span> <a href="src/Servant-Utils-Links.html#ValidLinkIn" class="link">Source</a></p><div class="doc"><p>The 'ValidLinkIn f s' constraint holds when <code>s</code> is an API that
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contains <code>f</code>, and <code>f</code> is a link.</p></div><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:mkLink" class="def">mkLink</a> <a href="src/Servant-Utils-Links.html#mkLink" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: f</td><td class="doc empty"> </td></tr><tr><td class="src">-> s</td><td class="doc empty"> </td></tr><tr><td class="src">-> <a href="Servant-Utils-Links.html#t:Link">Link</a></td><td class="doc"><p>This function will only typecheck if <code>f</code>
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is an URI within <code>s</code></p></td></tr></table></div></div><div class="subs instances"><p id="control.i:ValidLinkIn" class="caption collapser" onclick="toggleSection('i:ValidLinkIn')">Instances</p><div id="section.i:ValidLinkIn" class="show"><table><tr><td class="src">((~) <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#t:Bool">Bool</a> (<a href="Servant-Utils-Links.html#t:IsElem">IsElem</a> f s) <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a>, (~) <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#t:Bool">Bool</a> (<a href="Servant-Utils-Links.html#t:IsLink">IsLink</a> f) <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Bool.html#v:True">True</a>, <a href="Servant-Utils-Links.html#t:VLinkHelper">VLinkHelper</a> * f) => <a href="Servant-Utils-Links.html#t:ValidLinkIn">ValidLinkIn</a> f s</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:Link" class="def">Link</a> <a href="src/Servant-Utils-Links.html#Link" class="link">Source</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a name="v:Link" class="def">Link</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-String.html#t:String">String</a></td><td class="doc empty"> </td></tr></table></div><div class="subs instances"><p id="control.i:Link" class="caption collapser" onclick="toggleSection('i:Link')">Instances</p><div id="section.i:Link" class="show"><table><tr><td class="src"><a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Text-Show.html#t:Show">Show</a> <a href="Servant-Utils-Links.html#t:Link">Link</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:VLinkHelper" class="def">VLinkHelper</a> f <span class="keyword">where</span> <a href="src/Servant-Utils-Links.html#VLinkHelper" class="link">Source</a></p><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:vlh" class="def">vlh</a> :: <span class="keyword">forall</span> proxy. proxy f -> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-String.html#t:String">String</a> <a href="src/Servant-Utils-Links.html#vlh" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:VLinkHelper" class="caption collapser" onclick="toggleSection('i:VLinkHelper')">Instances</p><div id="section.i:VLinkHelper" class="show"><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:VLinkHelper">VLinkHelper</a> * (<a href="Servant-API-Get.html#t:Get">Get</a> x)</td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Servant-Utils-Links.html#t:VLinkHelper">VLinkHelper</a> * (<a href="Servant-API-Post.html#t:Post">Post</a> x)</td><td class="doc empty"> </td></tr><tr><td class="src">(<a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/GHC-TypeLits.html#t:KnownSymbol">KnownSymbol</a> s, <a href="Servant-Utils-Links.html#t:VLinkHelper">VLinkHelper</a> * e) => <a href="Servant-Utils-Links.html#t:VLinkHelper">VLinkHelper</a> * (<a href="Servant-API-Sub.html#t::-62-">(:>)</a> <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/GHC-TypeLits.html#t:Symbol">Symbol</a> s e)</td><td class="doc empty"> </td></tr></table></div></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.15.0</p></div></body></html> |