[Bug c++/95910] transform view in combination with single view calls const qualified begin even if it is not const

rene.rahn@fu-berlin.de gcc-bugzilla@gcc.gnu.org
Wed Jul 8 13:55:07 GMT 2020


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95910

--- Comment #4 from Rene Rahn <rene.rahn@fu-berlin.de> ---
> Hmm, if you can't easily specify a concrete return type, then you could maybe > try constraining the lambda appropriately.  In this particular example you 
> could replace the static_assert with an analogous require-clause, which would > turn the hard error into a SFINAE-friendly error.

Yes, this is basically what I would do know (AFAIK also recommended to always
constraint generic types). In this case I could work with an explicit return
type, though.

Many thanks for your support and time.


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