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Newsgroups: comp.lang.ada
Date: Sat, 3 Mar 2018 14:54:33 -0800 (PST)
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Subject: Re: expression functions and raise expressions
From: Jere <jhb.chat@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:50812
Date: 2018-03-03T14:54:33-08:00
List-Id: <comp.lang.ada>

On Saturday, March 3, 2018 at 3:54:06 PM UTC-5, Simon Wright wrote:
> Jere writes:
> 
> > GNAT GPL 2017 accepts it, but FSF GNAT 7.2 for mingw64 on Win10
> > gives some errors:
> > test.ads:328:11: (Ada 2005) cannot copy object of a limited type (RM-2005 6.5(5.5/2))
> > test.ads:328:11: return by reference not permitted in Ada 2005
> >
> > NOTE:  Reference_Type is untagged limited discriminated null
> > record with Implicit_Dereference defined.  Also note that a similar
> > function that returns an aggregate initialization compiles fine
> > on both versions.
> >
> > I am compiling with Ada2012 mode (-gnat12 option)
> >
> > I believe this to be a bug in GCC 7.2 for mingw64, but wanted to
> > make sure I wasn't misreading the RM.  
> 
> It's fixed in GCC 8.
> 
> It fails in the same way as 7.1.0, same weird error message about 2005,
> with GNAT GPL 2016.
> 
> (macOS High Sierra)

Ok, thanks for the confirmation.  I worked around it, but it definitely
caught me offguard.