Change QPDFObjectHandle == to isSameObjectAs

Replace operator== and operator!=, which were testing for the same
underlying object, with isSameObjectAs. This change was motivated by
the fact that pikepdf internally had its own operator== method for
QPDFObjectHandle that did structural comparison. I backed out qpdf's
operator== as a courtesy to pikepdf (in my own testing) but also
because I think people might naturally assume that operator== does a
structural comparison, and isSameObjectAs is clearer in its intent.

1 files changed, 3 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index db589d34..2ffd53cb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2022-09-09  Jay Berkenbilt  <ejb@ql.org>
 
+        * Add QPDFObjectHandle::isSameObjectAs to test whether two
+        QPDFObjectHandle objects point to the same underlying object.
+
         * Expose ability to create custom loggers and to get and set the
         logger for QPDF and QPDFJob through the C API.
 
@@ -29,10 +32,6 @@
         * Add new methods getArtBox and getBleedBox to
         QPDFPageObjectHelper, completing the set of bounding box methods.
 
-        * Add == equality for QPDFObjectHandle. Two QPDFObjectHandle
-        objects are equal if they point to the same underlying object,
-        meaning changes to one will be reflected in the other.
-
         * The --show-encryption option now works even if a correct
         password is not supplied. If you were using --show-encryption to
         test whether you have the right password, use --requires-password