Bug 18470 – std.algorithm.splitter has frame access problems for custom preds

This isn't an issue for the string binaryFuns as used in the examples, but their lambda variants fail: --- void main() { import std.algorithm; auto w = [[0], [1], [2]]; assert(w.splitter!"a.front == b"(1).equal([[[0]], [[2]]])); assert(w.splitter!((a, b) => a.front == b)(1).equal([[[0]], [[2]]])); // fails } --- --- onlineapp.d(8): Error: template std.algorithm.iteration.splitter cannot deduce function from argument types !((a, b) => a.front == b)(int[][], int), candidates are: /dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(3695): std.algorithm.iteration.splitter(alias pred = "a == b", Range, Separator)(Range r, Separator s) if (is(typeof(binaryFun!pred(r.front, s)) : bool) && (hasSlicing!Range && hasLength!Range || isNarrowString!Range)) /dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(4000): std.algorithm.iteration.splitter(alias pred = "a == b", Range, Separator)(Range r, Separator s) if (is(typeof(binaryFun!pred(r.front, s.front)) : bool) && (hasSlicing!Range || isNarrowString!Range) && isForwardRange!Separator && (hasLength!Separator || isNarrowString!Separator)) /dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(4264): std.algorithm.iteration.splitter(alias isTerminator, Range)(Range input) if (isForwardRange!Range && is(typeof(unaryFun!isTerminator(input.front)))) /dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(4510): std.algorithm.iteration.splitter(C)(C[] s) if (isSomeChar!C) ---- --- void main() { import std.algorithm; import std.ascii : toLower; assert("abXcdxef".splitter!"a.toLower == b"('x').equal(["ab", "cd", "ef"])); assert("abXcdxef".splitter!((a, b) => a.toLower == b)('x').equal(["ab", "cd", "ef"])); } --- --- /dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(3726): Error: static function onlineapp.main.splitter!((a, b) => a.toLower == b, string, char).splitter.Result.lastIndexOf cannot access frame of function D main /dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(3764): Error: function onlineapp.main.splitter!((a, b) => a.toLower == b, string, char).splitter.Result.front cannot access frame of function D main onlineapp.d(8): Error: template instance onlineapp.main.splitter!((a, b) => a.toLower == b, string, char) error instantiating ---

Pull : https://github.com/dlang/phobos/pull/6522

Commits pushed to master at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/b5162ecc014a33b5866f2de62b5af012cf425c1d fix issue 18470 - std.algorithm.splitter has frame access problems for custom preds https://github.com/dlang/phobos/commit/a6bf2b6c4793f6af9f6aa148f6bf603b702fb942 Merge pull request #6522 from BBasile/issue-18470 fix issue 18470 - std.algorithm.splitter has frame access problems for custom preds merged-on-behalf-of: Jack Stouffer <[email protected]>