Add fixed-point types#1560
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This PR is part of the stack implementing the fixed-point number types proposed in #1545. It lands the public type surface that every follow-up PR will build on. Adds the four core types: - `Signedness` — `'signed' | 'unsigned'`. - `RoundingMode` — `'floor' | 'ceil' | 'trunc' | 'round' | 'strict'`. The `'round'` mode breaks ties away from zero (e.g. `0.5 → 1`, `-0.5 → -1`, `-1.5 → -2`), which is symmetric around zero and differs from `Math.round`. The `'strict'` mode rejects inputs that would require rounding and throws instead. - `BinaryFixedPoint<TSignedness, TTotalBits, TFractionalBits>` — a fixed-point value whose scale is a power of 2. - `DecimalFixedPoint<TSignedness, TTotalBits, TDecimals>` — a fixed-point value whose scale is a power of 10.
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This PR is part of the stack implementing the fixed-point number types proposed in #1545. It lands the public type surface that every follow-up PR will build on.
Adds the four core types:
Signedness—'signed' | 'unsigned'.RoundingMode—'floor' | 'ceil' | 'trunc' | 'round' | 'strict'. The'round'mode breaks ties away from zero (e.g.0.5 → 1,-0.5 → -1,-1.5 → -2), which is symmetric around zero and differs fromMath.round. The'strict'mode rejects inputs that would require rounding and throws instead.BinaryFixedPoint<TSignedness, TTotalBits, TFractionalBits>— a fixed-point value whose scale is a power of 2.DecimalFixedPoint<TSignedness, TTotalBits, TDecimals>— a fixed-point value whose scale is a power of 10.