On Friday, 21 October 2016 at 19:41:00 UTC, Basile B. wrote:
They would have for constraint
`if (isInputRange!Range && isInputRange!(ElementType!Range))`
In case you wouldn't see directly what would they be used for,
it's for tree-like structures. Each element in a Range is also
an input range.
I see 3 obvious functions/templates
- the most important, make an input range from a tree-like
range, e.g `auto treeRange(Range, DepthMode mode)(Range range) `
- a second version for bidir ranges, e.g `reverseTreeRange`
- a functional iteration algorithm: auto `deepIterate(alias
Fun, DepthMode mode, Range, A...)(Range range, auto ref A a)`,
which applies Fun to each element with the ability for Fun to
act as a predicates to stop the iteration. Actually I have this
one in my user library (this is also the reason why I post this
today).
Unless I'm blind I cannot see anything that handles trees with
a range interface in phobos.
If you want to get the spirit see:
https://github.com/BBasile/iz/blob/master/import/iz/sugar.d#L1214
Now a few hours later I wonder if it could be a ndSlice job ? I
haven't used it so far, so I ask.
