Allow combining circuits with different unique registers#389

Merged

ajavadia merged 2 commits intoQiskit:masterfrom chriseclectic:combine-circuits-patch

Apr 10, 2018

+136-30

Commits on Apr 6, 2018

modify circuit addition rules to allow combining circuits with different but unique registers
chriseclectic
committed

Commits on Apr 9, 2018

fixed bug in extend circuit, added unit tests for extend
chriseclectic
committed