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>TypeFamilies</title
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><div id="package-header"
><ul class="links" id="page-menu"
><li
><a href=""
>Contents</a
></li
><li
><a href=""
>Index</a
></li
></ul
><p class="caption empty"
> </p
></div
><div id="content"
><div id="module-header"
><table class="info"
><tr
><th
>Safe Haskell</th
><td
>Safe-Inferred</td
></tr
></table
><p class="caption"
>TypeFamilies</p
></div
><div id="description"
><p class="caption"
>Description</p
><div class="doc"
><p
>Doc for: module TypeFamilies</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"
>data</span
> <a href=""
>X</a
><ul class="subs"
><li
>= <a href=""
>X</a
></li
><li
>| <a href=""
>XX</a
></li
><li
>| <a href=""
>XXX</a
></li
></ul
></li
><li class="src short"
><span class="keyword"
>data</span
> <a href=""
>Y</a
></li
><li class="src short"
><span class="keyword"
>data</span
> <a href=""
>Z</a
><ul class="subs"
><li
>= <a href=""
>ZA</a
></li
><li
>| <a href=""
>ZB</a
></li
></ul
></li
><li class="src short"
><span class="keyword"
>class</span
> <a href=""
>Test</a
> a</li
><li class="src short"
><span class="keyword"
>type family</span
> <a href=""
>Foo</a
> a :: k</li
><li class="src short"
><span class="keyword"
>data family</span
> <a href=""
>Bat</a
> a :: *</li
><li class="src short"
><span class="keyword"
>class</span
> <a href=""
>Assoc</a
> a <span class="keyword"
>where</span
><ul class="subs"
><li
><span class="keyword"
>data</span
> <a href=""
>AssocD</a
> a :: *</li
><li
><span class="keyword"
>type</span
> <a href=""
>AssocT</a
> a :: *</li
></ul
></li
><li class="src short"
><span class="keyword"
>type family</span
> <a href=""
>Bar</a
> b</li
><li class="src short"
><span class="keyword"
>type family</span
> a <a href=""
><></a
> b :: k</li
><li class="src short"
><span class="keyword"
>class</span
> a <a href=""
>><</a
> b</li
></ul
></div
><div id="interface"
><h1
>Documentation</h1
><div class="top"
><p class="src"
><span class="keyword"
>data</span
> <a name="t:X" class="def"
>X</a
></p
><div class="doc"
><p
>Doc for: data X</p
></div
><div class="subs constructors"
><p class="caption"
>Constructors</p
><table
><tr
><td class="src"
><a name="v:X" class="def"
>X</a
></td
><td class="doc"
><p
>Doc for: X</p
></td
></tr
><tr
><td class="src"
><a name="v:XX" class="def"
>XX</a
></td
><td class="doc"
><p
>Doc for: XX</p
></td
></tr
><tr
><td class="src"
><a name="v:XXX" class="def"
>XXX</a
></td
><td class="doc"
><p
>Doc for: XXX</p
></td
></tr
></table
></div
><div class="subs instances"
><p id="control.i:X" class="caption collapser" onclick="toggleSection('i:X')"
>Instances</p
><div id="section.i:X" class="show"
><table
><tr
><td class="src"
><a href=""
>Assoc</a
> * <a href=""
>X</a
></td
><td class="doc"
><p
>Doc for: instance Assoc X</p
></td
></tr
><tr
><td class="src"
><a href=""
>Test</a
> * <a href=""
>X</a
></td
><td class="doc"
><p
>Doc for: instance Test X</p
></td
></tr
><tr
><td class="src"
><a href=""
>(><)</a
> <a href=""
>X</a
> <a href=""
>XX</a
> <a href=""
>XXX</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>Foo</a
> <a href=""
>X</a
> = <a href=""
>Y</a
></td
><td class="doc"
><p
>External instance</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>AssocD</a
> * <a href=""
>X</a
> = <a name="v:AssocX" class="def"
>AssocX</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>AssocT</a
> * <a href=""
>X</a
> = <a href=""
>Foo</a
> * <a href=""
>X</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bat</a
> * <a href=""
>X</a
> <ul class="inst"
><li class="inst"
>= <a name="v:BatX" class="def"
>BatX</a
> <a href=""
>X</a
></li
><li class="inst"
>| <a name="v:BatXX" class="def"
>BatXX</a
> { <ul class="subs"
><li
><a name="v:aaa" class="def"
>aaa</a
> :: <a href=""
>X</a
></li
><li
><a name="v:bbb" class="def"
>bbb</a
> :: <a href=""
>Y</a
></li
></ul
> }</li
></ul
></td
><td class="doc"
><p
>Doc for: data instance Bat X</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>Foo</a
> * <a href=""
>X</a
> = <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: type instance Foo X = Y</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>(<>)</a
> * <a href=""
>X</a
> a = <a href=""
>X</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>(<>)</a
> <a href=""
>X</a
> <a href=""
>XXX</a
> <a href=""
>XX</a
> = <a href=""
>X</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:Y" class="def"
>Y</a
></p
><div class="doc"
><p
>Doc for: data Y</p
></div
><div class="subs instances"
><p id="control.i:Y" class="caption collapser" onclick="toggleSection('i:Y')"
>Instances</p
><div id="section.i:Y" class="show"
><table
><tr
><td class="src"
><a href=""
>Assoc</a
> * <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: instance Assoc Y</p
></td
></tr
><tr
><td class="src"
><a href=""
>Test</a
> * <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: instance Test Y</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bar</a
> <a href=""
>Y</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>AssocD</a
> * <a href=""
>Y</a
> = <a name="v:AssocY" class="def"
>AssocY</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>AssocT</a
> * <a href=""
>Y</a
> = <a href=""
>Bat</a
> * <a href=""
>Y</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bat</a
> * <a href=""
>Y</a
> = <a name="v:BatY" class="def"
>BatY</a
> <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: data instance Bat Y</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>Foo</a
> * <a href=""
>Y</a
> = <a href=""
>X</a
></td
><td class="doc"
><p
>Doc for: type instance Foo Y = X</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>(<>)</a
> * <a href=""
>Y</a
> a = 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:Z" class="def"
>Z</a
></p
><div class="doc"
><p
>Doc for: data Z</p
></div
><div class="subs constructors"
><p class="caption"
>Constructors</p
><table
><tr
><td class="src"
><a name="v:ZA" class="def"
>ZA</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><a name="v:ZB" class="def"
>ZB</a
></td
><td class="doc empty"
> </td
></tr
></table
></div
><div class="subs instances"
><p id="control.i:Z" class="caption collapser" onclick="toggleSection('i:Z')"
>Instances</p
><div id="section.i:Z" class="show"
><table
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bat</a
> <a href=""
>Z</a
> <span class="keyword"
>where</span
><ul class="inst"
><li class="inst"
><a name="v:BatZ1" class="def"
>BatZ1</a
> :: <a href=""
>Z</a
> -> <a href=""
>Bat</a
> <a href=""
>Z</a
> <a href=""
>ZA</a
></li
><li class="inst"
><a name="v:BatZ2" class="def"
>BatZ2</a
> :: { <ul class="subs"
><li
><a name="v:batx" class="def"
>batx</a
> :: <a href=""
>X</a
></li
><li
><a name="v:baty" class="def"
>baty</a
> :: <a href=""
>Y</a
></li
></ul
> } -> <a href=""
>Bat</a
> <a href=""
>Z</a
> <a href=""
>ZB</a
></li
></ul
></td
><td class="doc"
><p
>Doc for: data instance Bat Z</p
></td
></tr
></table
></div
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>class</span
> <a name="t:Test" class="def"
>Test</a
> a</p
><div class="doc"
><p
>Doc for: class Test a</p
></div
><div class="subs instances"
><p id="control.i:Test" class="caption collapser" onclick="toggleSection('i:Test')"
>Instances</p
><div id="section.i:Test" class="show"
><table
><tr
><td class="src"
><a href=""
>Test</a
> * <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: instance Test Y</p
></td
></tr
><tr
><td class="src"
><a href=""
>Test</a
> * <a href=""
>X</a
></td
><td class="doc"
><p
>Doc for: instance Test X</p
></td
></tr
></table
></div
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>type family</span
> <a name="t:Foo" class="def"
>Foo</a
> a :: k</p
><div class="doc"
><p
>Doc for: type family Foo a</p
></div
><div class="subs instances"
><p id="control.i:Foo" class="caption collapser" onclick="toggleSection('i:Foo')"
>Instances</p
><div id="section.i:Foo" class="show"
><table
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>Foo</a
> * <a href=""
>Y</a
> = <a href=""
>X</a
></td
><td class="doc"
><p
>Doc for: type instance Foo Y = X</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>Foo</a
> * <a href=""
>X</a
> = <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: type instance Foo X = Y</p
></td
></tr
></table
></div
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>data family</span
> <a name="t:Bat" class="def"
>Bat</a
> a :: *</p
><div class="doc"
><p
>Doc for: data family Bat a</p
></div
><div class="subs instances"
><p id="control.i:Bat" class="caption collapser" onclick="toggleSection('i:Bat')"
>Instances</p
><div id="section.i:Bat" class="show"
><table
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bat</a
> <a href=""
>Z</a
> <span class="keyword"
>where</span
><ul class="inst"
><li class="inst"
><a name="v:BatZ1" class="def"
>BatZ1</a
> :: <a href=""
>Z</a
> -> <a href=""
>Bat</a
> <a href=""
>Z</a
> <a href=""
>ZA</a
></li
><li class="inst"
><a name="v:BatZ2" class="def"
>BatZ2</a
> :: { <ul class="subs"
><li
><a name="v:batx" class="def"
>batx</a
> :: <a href=""
>X</a
></li
><li
><a name="v:baty" class="def"
>baty</a
> :: <a href=""
>Y</a
></li
></ul
> } -> <a href=""
>Bat</a
> <a href=""
>Z</a
> <a href=""
>ZB</a
></li
></ul
></td
><td class="doc"
><p
>Doc for: data instance Bat Z</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bat</a
> * <a href=""
>Y</a
> = <a name="v:BatY" class="def"
>BatY</a
> <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: data instance Bat Y</p
></td
></tr
><tr
><td class="src"
><span class="keyword"
>data</span
> <a href=""
>Bat</a
> * <a href=""
>X</a
> <ul class="inst"
><li class="inst"
>= <a name="v:BatX" class="def"
>BatX</a
> <a href=""
>X</a
></li
><li class="inst"
>| <a name="v:BatXX" class="def"
>BatXX</a
> { <ul class="subs"
><li
><a name="v:aaa" class="def"
>aaa</a
> :: <a href=""
>X</a
></li
><li
><a name="v:bbb" class="def"
>bbb</a
> :: <a href=""
>Y</a
></li
></ul
> }</li
></ul
></td
><td class="doc"
><p
>Doc for: data instance Bat X</p
></td
></tr
></table
></div
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>class</span
> <a name="t:Assoc" class="def"
>Assoc</a
> a</p
><div class="doc"
><p
>Doc for: class Assoc a</p
></div
><div class="subs associated-types"
><p class="caption"
>Associated Types</p
><p class="src"
><span class="keyword"
>data</span
> <a name="t:AssocD" class="def"
>AssocD</a
> a :: *</p
><div class="doc"
><p
>Doc for: data AssocD a</p
></div
><p class="src"
><span class="keyword"
>type</span
> <a name="t:AssocT" class="def"
>AssocT</a
> a :: *</p
><div class="doc"
><p
>Doc for: type AssocT a</p
></div
></div
><div class="subs instances"
><p id="control.i:Assoc" class="caption collapser" onclick="toggleSection('i:Assoc')"
>Instances</p
><div id="section.i:Assoc" class="show"
><table
><tr
><td class="src"
><a href=""
>Assoc</a
> * <a href=""
>Y</a
></td
><td class="doc"
><p
>Doc for: instance Assoc Y</p
></td
></tr
><tr
><td class="src"
><a href=""
>Assoc</a
> * <a href=""
>X</a
></td
><td class="doc"
><p
>Doc for: instance Assoc X</p
></td
></tr
></table
></div
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>type family</span
> <a name="t:Bar" class="def"
>Bar</a
> b</p
><div class="doc"
><p
>Doc for: type family Bar b</p
></div
><div class="subs equations"
><p class="caption"
>Equations</p
><table
><tr
><td class="src"
><a href=""
>Bar</a
> <a href=""
>X</a
> = <a href=""
>X</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><a href=""
>Bar</a
> y = <a href=""
>Y</a
></td
><td class="doc empty"
> </td
></tr
></table
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>type family</span
> a <a name="t:-60--62-" class="def"
><></a
> b :: k</p
><div class="subs instances"
><p id="control.i:-60--62-" class="caption collapser" onclick="toggleSection('i:-60--62-')"
>Instances</p
><div id="section.i:-60--62-" class="show"
><table
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>(<>)</a
> * <a href=""
>Y</a
> a = a</td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>(<>)</a
> * <a href=""
>X</a
> a = <a href=""
>X</a
></td
><td class="doc empty"
> </td
></tr
><tr
><td class="src"
><span class="keyword"
>type</span
> <a href=""
>(<>)</a
> <a href=""
>X</a
> <a href=""
>XXX</a
> <a href=""
>XX</a
> = <a href=""
>X</a
></td
><td class="doc empty"
> </td
></tr
></table
></div
></div
></div
><div class="top"
><p class="src"
><span class="keyword"
>class</span
> a <a name="t:-62--60-" class="def"
>><</a
> b</p
><div class="subs instances"
><p id="control.i:-62--60-" class="caption collapser" onclick="toggleSection('i:-62--60-')"
>Instances</p
><div id="section.i:-62--60-" class="show"
><table
><tr
><td class="src"
><a href=""
>(><)</a
> <a href=""
>X</a
> <a href=""
>XX</a
> <a href=""
>XXX</a
></td
><td class="doc empty"
> </td
></tr
></table
></div
></div
></div
></div
></div
><div id="footer"
><p
>Produced by <a href=""
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> version 2.15.0</p
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