[QECGatesCost] Port everything to QECGatesCost #1359
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fdmalone
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This changes the default implementation of
t_complexityto go viaQECGatesCost. This builds on the prior changes #1313 #1323 #1333 and the even longer history of bloq-ifying the t_complexity protocolSpecifically in this PR there are
QECGatesCostthat can toggle "legacy" behavior for exact matching of counts. You can read the code to see exactly what this isTComplexityobject.With these changes: all bloq examples match their T complexities. All tests pass.
Next steps will be to remove all
_t_complexity_overrides. This should be seamless, as I did most of the testing without the legacy shim to priorities_t_complexity_override and fixed most of the issues (usually by moving the costs tomy_static_costs).Pending resolution of #1318, we can change the way MultiTargetCNOT is handled. In this PR: the legacy flag makes it count as multiple cliffords; otherwise the "new" behavior of counting it as one object is maintained. If we want it to always count as multiple, then a symbolic call graph is needed.