lib: add value_name to OptionEnum to get the selected name

Signed-off-by: Jean-Sebastien Gelinas <calestar@gmail.com>
Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/lib/opts.nit b/lib/opts.nit
index 1673215..2850507 100644 (file)
--- a/lib/opts.nit
+++ b/lib/opts.nit
@@ -151,6 +151,8 @@ special OptionParameter
                return id
        end
 
+       fun value_name: String = _enum[value]
+
        redef fun pretty_default
        do
                if default_value != null then