shiboken6: Fix duplicate indexes for template instantiations

For a typedef "using Foo=QList<int>", shiboken generates SBK_QLIST_INT
besides SBK_FOO which is then matched by function arguments. The code
was however missing a check to restrict this to typedefs, so it
triggered for

class Alternative : public QVariantList,
class Sequence : public QVariantList

producing duplicate indexes.

Restrict this to real typedefs (which are also represented as classes.
Split out the function creating the special alternate index for
clarity and add a check for potential equivalent typedefs which would
also produce clashes.

Task-number: PYSIDE-1571
Change-Id: I9275963c4ddb8fc589e414ee1fa19282f6004793
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
(cherry picked from commit 42c0854f077d004dba43b713ec2cabb76747a270)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

0 files changed, 0 insertions, 0 deletions