/// Arithmetic precision accepted or required by an operation.
#[non_exhaustive]#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]pubenumPrecision{/// IEEE single precision.
F32,/// IEEE double precision.
F64,/// Deliberate mixed-precision path with documented error bounds.
Mixed,/// Exact arithmetic: the result carries no rounding error at all.
Exact,}