[PATCH setup 4/9] Add Option::isPresent() method

[Jon Turney <jon.turney@dronecode.org.uk>]

Add Option::isPresent() method, so we can distinguish between the cases of
an option which is present with the default value, and an option which is
absent.
---
 libgetopt++/include/getopt++/Option.h | 4 ++++
 libgetopt++/src/Option.cc             | 2 +-
 libgetopt++/src/OptionSet.cc          | 3 ++-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/libgetopt++/include/getopt++/Option.h b/libgetopt++/include/getopt++/Option.h
index 7ea0786..a32f949 100644
--- a/libgetopt++/include/getopt++/Option.h
+++ b/libgetopt++/include/getopt++/Option.h
@@ -46,8 +46,12 @@ public:
   };
   virtual Argument argument () const = 0;
 
+  void setPresent(bool _present) { present = _present; }
+  bool isPresent() { return present; }
+
 protected:
     Option ();
+    bool present;
 };
 
 #endif // _OPTION_H_
diff --git a/libgetopt++/src/Option.cc b/libgetopt++/src/Option.cc
index ac13ab9..7c61eba 100644
--- a/libgetopt++/src/Option.cc
+++ b/libgetopt++/src/Option.cc
@@ -15,7 +15,7 @@
 
 #include "getopt++/Option.h"
 
-Option::Option ()
+Option::Option () : present(false)
 {
 }
 
diff --git a/libgetopt++/src/OptionSet.cc b/libgetopt++/src/OptionSet.cc
index 82e1253..f57b89a 100644
--- a/libgetopt++/src/OptionSet.cc
+++ b/libgetopt++/src/OptionSet.cc
@@ -229,7 +229,8 @@ OptionSet::doOption(string &option, string::size_type const &pos)
 	    optionValue = value.c_str();
         }
 	break;
-    } 
+    }
+    theOption->setPresent(true);
     lastResult = theOption->Process(optionValue);
 }
 
-- 
2.12.3