Qx.RegisterError exception (Qx - Quantum Computing Simulator v0.10.1)

Raised when register construction receives invalid input.

Carries a :reason describing the cause so callers can pattern-match rather than parsing the message:

• :empty — the input list was empty.
• {:invalid_qubit, qubit} — a list element was not a normalized 2-element qubit tensor.
• {:invalid_input, value} — a renderer expected a register struct or Nx.Tensor and got something else.