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| author | Ian Lynagh <igloo@earth.li> | 2011-01-17 21:46:32 +0000 |
|---|---|---|
| committer | Ian Lynagh <igloo@earth.li> | 2011-01-17 21:46:32 +0000 |
| commit | 94e6670fcc1242f7f153022f90a1ab1e3c5ff0ab (patch) | |
| tree | a6b192f2663de1ff169857558e5abe566462ccdf /docs | |
| parent | 843b4bb61822eab5c3649da61c3417d0ec6caf52 (diff) | |
| download | haskell-94e6670fcc1242f7f153022f90a1ab1e3c5ff0ab.tar.gz | |
Update the generics docs; pointed out by Christian Maeder
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/glasgow_exts.xml | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml index ddbd2ec0aa..f7b66d9735 100644 --- a/docs/users_guide/glasgow_exts.xml +++ b/docs/users_guide/glasgow_exts.xml @@ -8920,7 +8920,7 @@ An example will give the idea: </para> <programlisting> - import Generics + import Data.Generics class Bin a where toBin :: a -> [Int] @@ -8940,7 +8940,7 @@ An example will give the idea: <para> This class declaration explains how <literal>toBin</literal> and <literal>fromBin</literal> work for arbitrary data types. They do so by giving cases for unit, product, and sum, -which are defined thus in the library module <literal>Generics</literal>: +which are defined thus in the library module <literal>Data.Generics</literal>: </para> <programlisting> data Unit = Unit @@ -8962,14 +8962,16 @@ where clause and over-ride whichever methods you please. <para>To use generics you need to</para> <itemizedlist> <listitem> - <para>Use the flags <option>-fglasgow-exts</option> (to enable the extra syntax), - <option>-XGenerics</option> (to generate extra per-data-type code), - and <option>-package lang</option> (to make the <literal>Generics</literal> library - available. </para> + <para> + Use the flags <option>-XGenerics</option> (to enable the + extra syntax and generate extra per-data-type code), + and <option>-package syb</option> (to make the + <literal>Data.Generics</literal> module available. + </para> </listitem> <listitem> - <para>Import the module <literal>Generics</literal> from the - <literal>lang</literal> package. This import brings into + <para>Import the module <literal>Data.Generics</literal> from the + <literal>syb</literal> package. This import brings into scope the data types <literal>Unit</literal>, <literal>:*:</literal>, and <literal>:+:</literal>. (You don't need this import if you don't mention these types |