add copy constructor for PBD::ID

git-svn-id: svn://localhost/ardour2/branches/3.0@6650 d708f5d6-7413-0410-9779-e7cbd77b26cf

2 files changed, 17 insertions, 1 deletions

diff --git a/libs/pbd/id.cc b/libs/pbd/id.cc
index 25c96c305e..b96863b0fa 100644
--- a/libs/pbd/id.cc
+++ b/libs/pbd/id.cc
@@ -48,6 +48,11 @@ ID::ID ()
 	_id = _counter++;
 }
 
+ID::ID (const ID& other)
+{
+	_id = other._id;
+}
+
 ID::ID (string str)
 {
 	string_assign (str);
@@ -85,6 +90,15 @@ ID::operator= (string str)
 	return *this;
 }
 
+ID&
+ID::operator= (const ID& other)
+{
+	if (&other != this) {
+		_id = other._id;
+	}
+	return *this;
+}
+
 ostream&
 operator<< (ostream& ostr, const ID& _id)
 {
diff --git a/libs/pbd/pbd/id.h b/libs/pbd/pbd/id.h
index d25ca81ef0..7a32a29002 100644
--- a/libs/pbd/pbd/id.h
+++ b/libs/pbd/pbd/id.h
@@ -31,7 +31,8 @@ class ID {
   public:
 	ID ();
 	ID (std::string);
-	
+	ID (const ID&);
+
 	bool operator== (const ID& other) const {
 		return _id == other._id; 
 	}
@@ -43,6 +44,7 @@ class ID {
 	bool operator== (const std::string&) const;
 
 	ID& operator= (std::string); 
+	ID& operator= (const ID&); 
 
 	bool operator< (const ID& other) const {
 		return _id < other._id;