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digitalmars.D.bugs - [Issue 8599] New: Link time error when class's method are defined without body and nothing is abstract

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8599

           Summary: Link time error  when class's method are defined
                    without body and nothing is abstract
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: deadalnix gmail.com



The sample code is the simplest ever :

class A {
    void foo();
}

This will cause the error :
classfail.o:(.rodata+0x50): undefined reference to `_D9classfail1A3fooMFZv'

when compiling with dmd 2.060

declaring A or foo as abstract fix the problem. abstract should be deducted
from code or compilation should fail before linking stage.

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Aug 29 2012
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8599


Jonathan M Davis <jmdavisProg gmx.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jmdavisProg gmx.com
         Resolution|                            |INVALID



PDT ---
abstract is never inferred. Why would it be inferred? Functions are only
abstract if marked abstract.

And if a function is not abstract, then it needs a body/definition, so obviousy
it's going to fail at link time when the linker doesn't find a definition for
it. It's perfectly legal to declare a function without giving its body as long
as the linker has the body. That's how .di files work. It's also useful with
stuff like version(D_Ddoc) where there is no definition and shouldn't be one.

This isn't a bug.

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Aug 29 2012
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8599






 abstract is never inferred. Why would it be inferred? Functions are only
 abstract if marked abstract.
 
 And if a function is not abstract, then it needs a body/definition, so obviousy
 it's going to fail at link time when the linker doesn't find a definition for
 it. It's perfectly legal to declare a function without giving its body as long
 as the linker has the body. That's how .di files work. It's also useful with
 stuff like version(D_Ddoc) where there is no definition and shouldn't be one.
 
 This isn't a bug.


You are right. I'm so dumb sometime.

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Sep 02 2012