`find` has an overload that doesn't take a needle but requires an unary predicate function. `findSplitBefore` and `findSplitAfter` should have equivalent overloads. Test illustrating use: ---- unittest { import std.algorithm : findSplitBefore; import std.uni : isWhite; import std.string : stripLeft; immutable tests = [ "prefix postfix lorem ipsum", "prefix\tpostfix lorem ipsum" ]; foreach(test; tests) { auto result = test.findSplitBefore!isWhite(); assert(result[0] == "prefix"); assert(result[1].stripLeft() == "postfix lorem ipsum"); } } ---- It would be especially useful because `until` is strictly lazy and thus can't be used with slicing to reproduce the above results.
Yup, I've ran into the same issue multiple times. This last time with the plain findSplit; I don't recall if also with findSplitBefore/After. This workaround works: range.byCodeUnit.findSplit!((a, b) => a.isWhite)(" "); Interestingly, if you use "" instead of " " it won't work, which arguably is a bug, since the predicate doesn't even use b.
THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/phobos/issues/10000 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB