[2025-02 LWG Motion 11] P3430R3 simd issues: explicit, unsequenced, identity-element position, and members of disabled simd #7687
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mattkretz
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burblebee
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Mar 6, 2025
| Vectorization-unsafe\iref{algorithms.parallel.defns} standard library functions | ||
| may not be invoked by \tcode{gen}. | ||
| \tcode{gen} is invoked exactly once for each $i$. | ||
| \tcode{gen} is invoked exactly once for each $i$, in increasing order of $i$. |
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This wording is hand-wavy; is that ok because it's just a remark? Same for this wording added elsewhere...
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What is hand-wavy about it? And what would you say instead?
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What is "each
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The preceding paragraph says:
Initializes the
$i^\text{th}$ element with
static_cast<value_type>(gen(integral_constant<simd-size-type, i>()))for all$i$ in the range of [0,size()).
Doesn't that sufficiently explain what "each
…, and members of disabled simd
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Fixes #7670
Also fixes cplusplus/papers#2097