• via Digitalmars-d-bugs (33/33) Oct 25 2014 https://issues.dlang.org/show_bug.cgi?id=13657

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=13657

          Issue ID: 13657
           Summary: Bidirectional File.byLine range
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nobody puremagic.com
          Reporter: bearophile_hugs eml.cc

Currently this works as expected with dmd 2.067alpha:

void main() {
    import std.stdio: writeln, File, stdin;
    import std.range: retro;
    import std.array: array;
    "test.d".File.byLine.array.retro.writeln;
}


But this:

void main() {
    import std.stdio: writeln, File, stdin;
    import std.range: retro;
    "test.d".File.byLine.retro.writeln;
}



test.d(4,25): Error: template std.range.retro cannot deduce function from
argument types !()(ByLine!(char, char)), candidates are:
...\dmd2\src\phobos\std\range.d(1966,6):        std.range.retro(Range)(Range r)
if (isBidirectionalRange!(Unqual!Range))


Perhaps File.byLine and File.byLineCopy can support reverse iteration of the
lines of a file.

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