FA-16879 / Floating-point arithmetic / Member archive

Decimal quantization passes source text through a binary float · case 04

Decimal quantization passes source text through a binary float.

Member previewVariant 4 · 3 implementations · 11 checks per implementation

Case contract

Quantize a decimal text to 10**exponent using a fresh precision-limited decimal context, half-even rounding, Emin=-9 and Emax=9. All traps are disabled; return result string and raised flag names. The coefficient precision includes trailing zeros imposed by the target quantum.

Why this case matters

An offline floating representation model isolates a reproducible arithmetic fault.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
tie odd	`["4.25", ["Inexact", "Rounded"]]`	`["4.26", ["Inexact", "Rounded"]]`	Failed

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