Add helpers for Magnitude arithmetic compatibility#640
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The core helper is `AssertMagnitudeU64RationalCompatible<M>`, which produces readable diagnostic errors when `M` is unsuitable. Since these are hard compiler errors, we split `IsMagnitudeU64RationalCompatible` out to give separate access to the three conditions, to make testing easier. All of this is in the detail namespace. Helps #531 and #607.
hoffbrinkle
approved these changes
Jan 23, 2026
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The core helper is
AssertMagnitudeU64RationalCompatible<M>, whichproduces readable diagnostic errors when
Mis unsuitable. Since theseare hard compiler errors, we split
IsMagnitudeU64RationalCompatibleout to give separate access to the three conditions, to make testing
easier. All of this is in the detail namespace.
Helps #531 and #607.