[trafficserver] 01/08: IntrusiveDList: Add user conversion from iterator to pointer to value_type.

[am...@apache.org]

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amc pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/trafficserver.git

commit 1e2ef5c8281531a7797f735011e27748a98ec801
Author: Alan M. Carroll <am...@apache.org>
AuthorDate: Fri Jul 20 08:36:21 2018 -0500

    IntrusiveDList: Add user conversion from iterator to pointer to value_type.
---
 lib/ts/IntrusiveDList.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/lib/ts/IntrusiveDList.h b/lib/ts/IntrusiveDList.h
index 320be15..98f92d4 100644
--- a/lib/ts/IntrusiveDList.h
+++ b/lib/ts/IntrusiveDList.h
@@ -142,6 +142,11 @@ public:
     /// @return A pointer to the referent.
     value_type *operator->() const;
 
+    /// Convenience conversion to pointer type
+    /// Because of how this list is normally used, being able to pass an iterator as a pointer is quite convienent.
+    /// If the iterator isn't valid, it converts to @c nullptr.
+    operator value_type *() const;
+
     /// Equality
     bool operator==(self_type const &that) const;
 
@@ -206,6 +211,11 @@ public:
     /// @return A pointer to the referent.
     value_type *operator->() const;
 
+    /// Convenience conversion to pointer type
+    /// Because of how this list is normally used, being able to pass an iterator as a pointer is quite convienent.
+    /// If the iterator isn't valid, it converts to @c nullptr.
+    operator value_type *() const;
+
   protected:
     /// Internal constructor for containers.
     iterator(list_type *list, value_type *v);
@@ -395,6 +405,11 @@ template <typename L> auto IntrusiveDList<L>::iterator::operator-> () const -> v
   return super_type::_v;
 }
 
+template <typename L> IntrusiveDList<L>::const_iterator::operator value_type *() const
+{
+  return _v;
+}
+
 template <typename L> auto IntrusiveDList<L>::const_iterator::operator*() const -> value_type &
 {
   return *_v;
@@ -405,6 +420,11 @@ template <typename L> auto IntrusiveDList<L>::iterator::operator*() const -> val
   return *super_type::_v;
 }
 
+template <typename L> IntrusiveDList<L>::iterator::operator value_type *() const
+{
+  return super_type::_v;
+}
+
 template <typename L>
 bool
 IntrusiveDList<L>::empty() const