[glib] docs: code example for enumeration types

[Sébastien Wilmet <swilmet src gnome org>]

commit 3f6d233e872e5d8a520486a644fb118d358a9be8
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Sep 18 17:16:59 2014 +0200

    docs: code example for enumeration types
    
    I had to read the GTK+ code recently to have an example.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736914

 gobject/genums.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/gobject/genums.c b/gobject/genums.c
index d6dc559..a4f22c9 100644
--- a/gobject/genums.c
+++ b/gobject/genums.c
@@ -50,6 +50,19 @@
  * GObject ships with a utility called [glib-mkenums][glib-mkenums],
  * that can construct suitable type registration functions from C enumeration
  * definitions.
+ *
+ * Example of how to get a string representation of an enum value:
+ * |[<!-- language="C" -->
+ * GEnumClass *enum_class;
+ * GEnumValue *enum_value;
+ *
+ * enum_class = g_type_class_ref (MAMAN_TYPE_MY_ENUM);
+ * enum_value = g_enum_get_value (enum_class, MAMAN_MY_ENUM_FOO);
+ *
+ * g_print ("Name: %s\n", enum_value->value_name);
+ *
+ * g_type_class_unref (enum_class);
+ * ]|
  */