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authorDomen Kožar <domen@dev.si>2016-05-30T22·40+0100
committerDomen Kožar <domen@dev.si>2016-05-30T22·40+0100
commit5339ae4437549296836a16fcc52040762404b403 (patch)
tree19109c086cd4f5fd81e37891ed7fdfa73e7782c7 /doc/manual/expressions/language-constructs.xml
parentf7be7324b433b0ac6385d5981054030524c92c4e (diff)
parent6766041b84f5bad6e489087521c3bdaabd750f01 (diff)
Merge pull request #576 from qknight/args_explanation
extended args@ explanation
Diffstat (limited to 'doc/manual/expressions/language-constructs.xml')
-rw-r--r--doc/manual/expressions/language-constructs.xml16
1 files changed, 11 insertions, 5 deletions
diff --git a/doc/manual/expressions/language-constructs.xml b/doc/manual/expressions/language-constructs.xml
index 74809bb412d3..7535e64ea9a5 100644
--- a/doc/manual/expressions/language-constructs.xml
+++ b/doc/manual/expressions/language-constructs.xml
@@ -177,13 +177,19 @@ map (concat "foo") [ "bar" "bla" "abc" ]</programlisting>
   <listitem><para>An <literal>@</literal>-pattern provides a means of referring
   to the whole value being matched:
 
-<programlisting>
-args@{ x, y, z, ... }: z + y + x + args.a</programlisting>
+<programlisting> args@{ x, y, z, ... }: z + y + x + args.a</programlisting>
+
+but can also be written as:
+
+<programlisting> { x, y, z, ... } @ args: z + y + x + args.a</programlisting>
 
   Here <varname>args</varname> is bound to the entire argument, which
   is further matched against the pattern <literal>{ x, y, z,
-  ... }</literal>.</para></listitem>
-
+  ... }</literal>. <literal>@</literal>-pattern makes mainly sense with an 
+  ellipsis(<literal>...</literal>) as you can access attribute names as 
+  <literal>a</literal>, using <literal>args.a</literal>, which was given as an
+  additional attribute to the function.
+  </para></listitem>
 
 </itemizedlist>
 
@@ -359,4 +365,4 @@ character, or inline/multi-line, enclosed within <literal>/*
 </simplesect>
 
 
-</section>
\ No newline at end of file
+</section>