https://issues.dlang.org/show_bug.cgi?id=11229
--- Comment #8 from Jack Stouffer <j...@jackstouffer.com> --- (In reply to Jon Degenhardt from comment #7) > auto mapAsLowerCase(Range)(Range str) > if (isInputRange!Range && isSomeChar!(ElementEncodingType!Range) && > !isConvertibleToString!Range) > { > static if (ElementEncodingType!Range.sizeof < dchar.sizeof) > { > import std.utf : byDchar; > return str.byDchar.mapAsLowerCase; > } > else > { > import std.algorithm : map; > import std.uni : toLower; > > return str.map!(x => x.toLower); > } > } I attempted to replace asLowerCase with this, but it's blocked by https://issues.dlang.org/show_bug.cgi?id=16005 --