Commits on Sep 2, 2024

1. Fix extraction of controlled parametric gates …

   The `mutable` check in the controlled-gate `OperationFromPython`
   extraction logic to check for a mutated `base_gate` was overzealous,
   and would return false positives for parametric controlled gates.  The
   only modification to `base_gate` of a standard-library gate that would
   not have caused data-model problems from Python space would be setting
   the base-gate label, which is used for a public feature of the circuit
   visualisers.
   
   The change to `get_standard_gate_name_mapping` is just a minor
   convenience to make the gate objects directly appendable to a circuit;
   previously, each `Parameter` object was distinct and had a UUID clash
   with others of the same name, so could not be used together.  The new
   behaviour is purely a convenience for tests; it largely should not be
   useful for users to directly append these gates.

   

   jakelishman committed Sep 2, 2024
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