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-rw-r--r--src/libutil/args.hh8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/libutil/args.hh b/src/libutil/args.hh
index 22c94b501..7521b3065 100644
--- a/src/libutil/args.hh
+++ b/src/libutil/args.hh
@@ -91,6 +91,14 @@ protected:
})
, arity(1)
{ }
+
+ template<class I>
+ Handler(std::optional<I> * dest)
+ : fun([=](std::vector<std::string> ss) {
+ *dest = string2IntWithUnitPrefix<I>(ss[0]);
+ })
+ , arity(1)
+ { }
};
/* Options. */