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Support zero-column corner case in vector visitors #1959

merged 5 commits into from Jun 23, 2016


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@krlmlr krlmlr commented Jun 23, 2016

  • hash(): return index
  • nrows(): stop() instead of segfault

Fixes #1957.

With tests, which pass locally. Travis fails because of tibble update (#1949).

Currently I have no idea how to make the forward of n_distinct() to n() explicit in the code for hybrid evaluation.

@krlmlr krlmlr force-pushed the b-1957-n-distinct-zero branch from 7a368ab to 6b3b302 Jun 23, 2016
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@hadley hadley commented Jun 23, 2016

I think I would prefer to make this an error, rather than switching to n() behaviour

@krlmlr krlmlr force-pushed the b-1957-n-distinct-zero branch from 6b3b302 to ecd6012 Jun 23, 2016
@hadley hadley merged commit 95822df into tidyverse:master Jun 23, 2016
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@hadley hadley commented Jun 23, 2016


@krlmlr krlmlr deleted the b-1957-n-distinct-zero branch Jun 23, 2016
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