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digitalmars.D.bugs - [Issue 10168] New: Named tuple: inconsistent behavior

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=10168

           Summary: Named tuple: inconsistent behavior
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: r.97all gmail.com



---
The code at the bottom outputs

 S(314159265)
 S(0)


in DMD 2.062, http://dpaste.1azy.net/96d42b70
but

 S(0)
 S(314159265)


in another version, http://dpaste.1azy.net/edc065ea
I think right output is S(314159265) repeated 2 times.

-----
import std.stdio;
import std.typecons : Tuple;

struct S
{
    int x;
    Tuple!(S, "x") toTuple()
    {
        return Tuple!(S, "x")(this);
    }
}

void main()
{
    auto y = S(314159265).toTuple();
    y[0].writeln();
    y.x.writeln();
}

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May 25 2013
parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=10168


bearophile_hugs eml.cc changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bearophile_hugs eml.cc



Also this similar program gives an unusual error message:


import std.stdio: writeln;
import std.typecons: Tuple;
struct Foo {
    int x;
    Tuple!(Foo, "x") toTuple() {
        return Tuple!(Foo, "x")(this);
    }
}
void main() {
    auto y = Foo(100).toTuple;
    y[1].writeln; // line 11
    y.x.writeln;
}


temp.d(11): Error: no [] operator overload for type Tuple!(Foo, "x")

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May 26 2013