Bug 22002 – std.algorithm.each breaks when used with InputRangeObject

The following complete example unittest { import std.algorithm : each; import std.range : only, inputRangeObject; import std.stdio : writeln; only(1, 2).inputRangeObject.each!writeln; } Fails with this error: each.d(6): Error: `std.algorithm.iteration.each!(writeln).each` called with argument types `(InputRangeObject!(OnlyResult!(int, int)))` matches both: phobos/std/algorithm/iteration.d(953): `std.algorithm.iteration.each!(writeln).each!(InputRangeObject!(OnlyResult!(int, int))).each(InputRangeObject!(OnlyResult!(int, int)) r)` and: phobos/std/algorithm/iteration.d(1014): `std.algorithm.iteration.each!(writeln).each!(InputRangeObject!(OnlyResult!(int, int))).each(InputRangeObject!(OnlyResult!(int, int)) r)` With DMD64 D Compiler v2.097.0

workaround: auto noapply(T)(T x) { import std.range.primitives : ElementType; struct NoApply(T) { T wrapped; alias wrapped this; @disable ElementType!T opApply(); } return NoApply!T(x); } unittest { import std.algorithm : each; import std.range : only, inputRangeObject; import std.stdio : writeln; only(1, 2).inputRangeObject.noapply.each!writeln; }

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