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digitalmars.D.bugs - [Issue 11113] New: Weird constructor syntax failure

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11113

           Summary: Weird constructor syntax failure
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: daniel350 bigpond.com


--- Comment #0 from daniel350 bigpond.com 2013-09-23 21:30:47 PDT ---
After adding a constructor to a struct in my code, I noticed my {} initializers
were no longer compiling, with a suggestion by the compiler to use ( and )
instead.

Understanding this probably means to use the full constructor prototype, not
just just replace { with (, I decided to just mass replace the { and ( anyway.

The resulting error was actually incredibly strange, and I can't understand the
behavior of DMD in this instance, and therefore assume it is a bug.

Example:

struct Foo {
    float a, b;
}

void main() {
    Foo[] xs = [(0, 1), (2, 3), (4, 5)];
}

Result:

test.d(6): Error: cannot implicitly convert expression ([1, 3, 5]) of type
int[] to Foo[]

How/why did it reduce (.., x) to x each time?

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11113


Maxim Fomin <maxim maxim-fomin.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |maxim maxim-fomin.ru
         Resolution|                            |INVALID


--- Comment #1 from Maxim Fomin <maxim maxim-fomin.ru> 2013-09-23 21:45:22 PDT
---
Please read struct spec - it tells that adding a struct constructor breaks
struct literals. For the question regarding why [(0, 1), (2, 3), (4, 5)] is
[1,3,5] please read expression spec page about comma operator. Bugzilla is not
a service for asking questions about what you do not understand - please user
D.learn instead.

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prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11113



--- Comment #2 from daniel350 bigpond.com 2013-09-23 21:51:01 PDT ---
Then I guess put this down as just another +1 for DIP19.

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