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[2019-02 LWG Motion 17] P1024R3 Usability Enhancements for std::span #2708

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jensmaurer opened this issue Feb 24, 2019 · 2 comments
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[2019-02 LWG Motion 17] P1024R3 Usability Enhancements for std::span #2708

jensmaurer opened this issue Feb 24, 2019 · 2 comments
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jensmaurer commented Feb 24, 2019 •
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P1024R3
@jensmaurer jensmaurer added this to the post-2019-02 milestone Feb 26, 2019
@jensmaurer jensmaurer mentioned this issue Feb 26, 2019
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@jensmaurer jensmaurer self-assigned this Feb 28, 2019
@jensmaurer jensmaurer mentioned this issue Feb 28, 2019
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FYI: this paper has an interaction with P1227R2, which changes the type of span's second template parameter from ptrdiff_t to size_t. After application of P1227R2, the specializations of tuple_size and tuple_element that this paper adds will never be matched (which IIRC means they are ill-formed NDR).

LWG is hoping - @mclow can verify - that we can editorially change the ptrdiff_t's in this paper to size_t's to resolve the conflict.

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mclow commented Mar 1, 2019

I offered (in plenary) to consult about merge conflicts between P1024 and P1227. I have implemented both in libc++ w/o any compatibility concerns (doing what Casey suggested)

zygoloid added a commit that referenced this issue Mar 15, 2019
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Merge 2019-02 LWG Motion 17
eda599e 
P1024R3 Usability Enhancements for std::span

Fixes #2708.
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