[Issue 19544] Can't call inputRangeObject on ranges not supported by moveFront
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Thu Sep 30 00:35:18 UTC 2021
https://issues.dlang.org/show_bug.cgi?id=19544
--- Comment #3 from Dlang Bot <dlang-bot at dlang.rocks> ---
@pbackus created dlang/phobos pull request #8256 "Issue 19544 - Can't call
inputRangeObject on ranges not supported by …" mentioning this issue:
- Issue 19544 - Can't call inputRangeObject on ranges not supported by
moveFront
The range algorithms moveFront, moveBack, and moveAt do not accept all
valid input ranges, bidirectional ranges, and random-access ranges,
respectively. Their inclusion as methods of the InputRange,
BidirectionalRange, and RandomAccessFinite interfaces previously caused
InputRangeObject, which implements those interfaces, to fail to compile
when instantiated with certain valid input, bidirectional, and
random-access ranges.
These methods should not have been included in their respective
interfaces to begin with, but removing them now would break existing
code. Instead, as a workaround, InputRangeObject now implements these
methods by throwing an exception if the wrapped range does not support
them.
https://github.com/dlang/phobos/pull/8256
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