Soul compiled step with dxc and found NaN gives 1, so the docs-based
change is reverted to the compiler's behaviour. The shader mirror test
only proved compilation and grows numeric comparison of every mirrored
function. The operator keeps the ref row indexer without an analyzer and
documents that writes through readonly, in, and property receivers land on
a copy.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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