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digitalmars.D.bugs - [Issue 8427] New: [2.060 beta] static foreach over typesafe vararg rejected

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8427

           Summary: [2.060 beta] static foreach over typesafe vararg
                    rejected
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: cbkbbejeap mailinator.com


--- Comment #0 from Nick Sabalausky <cbkbbejeap mailinator.com> 2012-07-24
15:49:52 PDT ---
void foo(T...)(T args)
{
    foreach(T arg; args)
    {}
}

void main()
{
    foo("", [""]);
}

Works in 2.059, but not in 2.060 beta:

testTypeSafeVarArg.d(1): Error: cannot implicitly convert expression (_param_0)
of type string to string[]
testTypeSafeVarArg.d(1): Error: cannot implicitly convert expression (_param_1)
of type string[] to string
testTypeSafeVarArg.d(9): Error: template instance
testTypeSafeVarArg.foo!(string,string[]) error instantiating

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8427


klickverbot <code klickverbot.at> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |code klickverbot.at


--- Comment #1 from klickverbot <code klickverbot.at> 2012-07-24 16:04:33 PDT
---
foreach(T arg; args) – sure about that T there?

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Simen Kjaeraas <simen.kjaras gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simen.kjaras gmail.com


--- Comment #2 from Simen Kjaeraas <simen.kjaras gmail.com> 2012-07-24 16:08:58
PDT ---
(In reply to comment #1)

 foreach(T arg; args) – sure about that T there?


As Nick stated in the report, it compiles under 2.059. However,

void foo(T...)(T args)
{
    foreach(T arg; args)
    {
        pragma(msg, typeof(arg));
        pragma(msg, T);
    }
}

void main()
{
    foo("", [""]);
}

Should prove that the T is being ignored in 2.059, and as such it accepts
invalid code. This is not a regression, it's a fix.

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Nick Sabalausky <cbkbbejeap mailinator.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


--- Comment #3 from Nick Sabalausky <cbkbbejeap mailinator.com> 2012-07-24
17:32:58 PDT ---
Fuck, good catch! Never mind me. Carry on ;)

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--- Comment #4 from Kenji Hara <k.hara.pg gmail.com> 2012-07-24 19:24:32 PDT ---
The original issue that fixed in 2.060beta is bug 5435.
Then, if you iterate a tuple that has heterogeneous elements, you should not
add type for foreach argument.

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