implement non-member operator+ for iterators

all of these iterator classes already have a member operator+, which allows iter+int.
This commits addes non-member operator+, which allows int+iter, and forwards to the member
QList and QArrayData iterators now satisfy RandomAccessIterator concept

Change-Id: I25c1dd8cea299e735d5a5e288dbe23dc1d7a1933
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/corelib/tools/qarraydata.h b/src/corelib/tools/qarraydata.h
index f0cc56e899..a642fb9b39 100644
--- a/src/corelib/tools/qarraydata.h
+++ b/src/corelib/tools/qarraydata.h
@@ -159,6 +159,7 @@ struct QTypedArrayData
         inline iterator &operator-=(int j) { i-=j; return *this; }
         inline iterator operator+(int j) const { return iterator(i+j); }
         inline iterator operator-(int j) const { return iterator(i-j); }
+        friend inline iterator operator+(int j, iterator k) { return k + j; }
         inline int operator-(iterator j) const { return i - j.i; }
         inline operator T*() const { return i; }
     };
@@ -194,6 +195,7 @@ struct QTypedArrayData
         inline const_iterator &operator-=(int j) { i-=j; return *this; }
         inline const_iterator operator+(int j) const { return const_iterator(i+j); }
         inline const_iterator operator-(int j) const { return const_iterator(i-j); }
+        friend inline const_iterator operator+(int j, const_iterator k) { return k + j; }
         inline int operator-(const_iterator j) const { return i - j.i; }
         inline operator const T*() const { return i; }
     };