lib/opt: add OptionCount

An option count works like a OptionBool except it counts the number of
occurrences of the flag.

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/lib/opts.nit b/lib/opts.nit
index 81b9a98..b4da3f5 100644 (file)
--- a/lib/opts.nit
+++ b/lib/opts.nit
@@ -97,6 +97,15 @@ special Option
        redef meth read_param(it) do value = true
 end
 
+class OptionCount
+special Option
+       redef type VALUE: Int
+
+       init(help: String, names: String...) do init_opt(help, 0, names)
+
+       redef meth read_param(it) do value += 1
+end
+
 # Option with one mandatory parameter
 class OptionParameter
 special Option