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authorEelco Dolstra <edolstra@gmail.com>2021-09-14 19:05:28 +0200
committerEelco Dolstra <edolstra@gmail.com>2021-09-14 19:32:33 +0200
commit817562e6946fa44c253beb76a36d85b55fd9c14d (patch)
tree9259231b8a4eebd81344a8f323d8737ef2c7f0f9 /src/libutil
parent1fbaf367292a8eb57a120f74daacabccce622f2f (diff)
Add "nix profile rollback" command
Diffstat (limited to 'src/libutil')
-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. */