[Issue 4985] New: A missing length problem in typecons.Tuple

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4985

           Summary: A missing length problem in typecons.Tuple
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2010-10-03 13:30:17 PDT ---
A (hopefully correct) reduced test case from page 30 of:
http://nwcpp.org/images/stories/nwcpp-2010-09.pdf


import std.concurrency: spawn, send;
void foo() {}
void main() {
    foreach (b; [cast(immutable(ubyte)[])[1]])
        send(spawn(&foo), b);
}



DMD 2.049 shows:
...\dmd\src\phobos\std\typecons.d(336): Error: no property 'length' for type
'immutable(char)'


This is the part of typecons.Tuple that gives the error:

    static string injectNamedFields()
    {
        string decl = "";
        foreach (i, name; staticMap!(extractName, fieldSpecs))
        {
            auto    field = text("Identity!(field[", i, "])");
            auto numbered = text("_", i);
            decl ~= text("alias ", field, " ", numbered, ";");
            if (name.length != 0) // line 336
            {
                decl ~= text("alias ", numbered, " ", name, ";");
            }
        }
        return decl;
    }

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