gap-system / gap / 11456

4%

push

travis-ci

Remove kernel operation Elm0List; revise Elm0ListObject

Nothing on the GAP level ever used the kernel operation `Elm0List` /
`ELM0_LIST`, other than few unit tests and a handful of methods that were
installed, but never called.

At the same time, quite some kernel code call these; as a result, if one wants
to implement lists as external objects, one has to provide methods for
`Elm0List`, not just `ELM_LIST` / `\[\]` -- but nobody did do so.

Also `Elm0ListObject` had to go through some contortions to decide whether a
GAP method returned `fail` to indicate a hole, or whether the list really
contained `fail`.

We thus remove `Elm0List` form the GAP level, and instead reimplement
`Elm0ListObject` in terms of the standard operations `IsBound` and `\[\]`,

1 of 1 new or added line in 1 file covered. (100.0%)

286825 of 338332 relevant lines covered (84.78%)

29047246.42 hits per line