Bug 19727 – std.algorithm.endsWith fails to compile while startsWith succeeds

startsWith succeeds but endsWith fails. import std.stdio; import std.algorithm; import std.file; import std.path; void main() { string[] ex = ["abc", "def", "ghi"]; string t = "/folder/test.ghi"; // works writeln(ex.any!(e => t.asRelativePath("/folder").startsWith(e))); // fails writeln(ex.any!(e => t.asRelativePath("/folder").endsWith(e))); } Fails with: source/app.d(12,15): Error: template app.main.any!((e) => t.asRelativePath("/folder").endsWith(e)).any cannot deduce function from argument types !()(string[]), candidates are: /Library/D/dmd/src/phobos/std/algorithm/searching.d(169,10): app.main.any!((e) => t.asRelativePath("/folder").endsWith(e)).any(Range)(Range range) if (isInputRange!Range && is(typeof(unaryFun!pred(range.front)))) dmd failed with exit code 1.

Workaround: t.asRelativePath("/folder").to!string As typeof(t.asRelativePath("/folder")) is ChooseResult!(ByCodeUnitImpl, Result), it seems to cause the problem!?

This boils down to [""].joiner("") not returning a bidirectional range.

(In reply to Simen Kjaeraas from comment #2) > This boils down to [""].joiner("") not returning a bidirectional range. For reference, here's the previous PR which added bidirectional range support for joiner (without args) https://github.com/dlang/phobos/pull/6115 Might be a good starting point for future work.

@vladchicos created dlang/phobos pull request #8185 "[DSSv3] Fix Issue 19727 - std.algorithm.endsWith fails to compile while startsWith succeeds" fixing this issue: - Fix Issue 19727 - std.algorithm.endsWith fails to compile while startsWith succeeds. https://github.com/dlang/phobos/pull/8185

dlang/phobos pull request #8185 "[DSSv3] Fix Issue 19727 - std.algorithm.endsWith fails to compile while startsWith succeeds" was merged into master: - 68dab0e2e522730db8ec3e044a007505fe883793 by vladchicos: Fix Issue 19727 - std.algorithm.endsWith fails to compile while startsWith succeeds. https://github.com/dlang/phobos/pull/8185