ReadonlyconfigImmutable settings; use this identity to scope cached numerical results.
ReadonlyidDiagnostic backend name, not a compatibility key.
ReadonlyidentityStable backend compatibility identity, shared across tiers and configurations.
ReadonlytierAvailable capability tier.
Parse a strict decimal literal or convert a native scalar. No arbitrary object coercion.
Numeric text preserving negative zero; formatting is backend-specific.
Immutable scalar representation and comparison contract, independent of any backend.