• d-bugmail puremagic.com Sep 01 2009
• d-bugmail puremagic.com Oct 29 2009
• d-bugmail puremagic.com Oct 11 2010

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=3279

           Summary: Type tuple comparison fails
           Product: D
           Version: 2.032
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: blocker
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: bartosz relisoft.com


I get this strange error message:

Error: incompatible types for (((long, int)) == ((long, int))): '(long, int)'
and '(long, int)'

when compiling this program:
----
import std.typetuple;

template TypeList(T...)
{
    alias T toTuple;
}

template snoC(T, alias List)
{
    alias TypeList!(List.toTuple, T) snoC;
}

static assert (snoC!(int, TypeList!(long)).toTuple == TypeTuple!(long, int));
----

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=3279


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
                 CC|                            |clugdbug yahoo.com.au
           Severity|blocker                     |major


--- Comment #1 from Don <clugdbug yahoo.com.au> 2009-10-29 08:53:55 PDT ---
This is a diagnostic bug. The error message is highly misleading. Even this
won't compile:

static assert (TypeTuple!(long, int) == TypeTuple!(long, int));

And it *shouldn't* compile, since they are types, not expressions, so they
can't be compared with ==. The code should be rewritten as:

static assert (is(snoC!(int, TypeList!(long)).toTuple == TypeTuple!(long,
int)));

which compiles. Downgrading from blocker to major.
While investigating this I found bug 3451.

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=3279



--- Comment #2 from Manuel König <manuelk89 gmx.net> 2010-10-11 10:24:49 PDT ---
*** Issue 3278 has been marked as a duplicate of this issue. ***

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