cmArgumentParser: Model non-empty strings with wrapper type

Some clients have been explicitly checking whether the string specified
after a keyword is empty.  Offer them a way to specify that the string
must be non-empty as part of the binding type.

1 files changed, 1 insertions, 0 deletions

diff --git a/Source/cmArgumentParser.h b/Source/cmArgumentParser.h
index c25e2f6..ac78872 100644
--- a/Source/cmArgumentParser.h
+++ b/Source/cmArgumentParser.h
@@ -171,6 +171,7 @@ public:
   void Bind(std::function<Continue(cm::string_view)> f, ExpectAtLeast expect);
   void Bind(bool& val);
   void Bind(std::string& val);
+  void Bind(NonEmpty<std::string>& val);
   void Bind(Maybe<std::string>& val);
   void Bind(MaybeEmpty<std::vector<std::string>>& val);
   void Bind(NonEmpty<std::vector<std::string>>& val);