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[xoptional] String representation for missing values #8

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SylvainCorlay opened this issue Sep 19, 2017 · 1 comment
Open

[xoptional] String representation for missing values #8

SylvainCorlay opened this issue Sep 19, 2017 · 1 comment
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@SylvainCorlay
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Currently, ostream operator() prints N/A for missing values, which cannot be used as an input for initializing missing values.

Maybe printing xt::missing<T> with the proper string representation of type T would be a better choice.

(Moved from xtensor-stack/xtensor#381)
@SylvainCorlay
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SylvainCorlay commented Sep 19, 2017 •
edited

There was a suggestion by @wolfv about a tag value castable to a missing xoptional.

Also, std::optional has std::nullopt_t.

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@SylvainCorlay