Re: Errors compiling with clang

[Yves Renard]

Dear Sam,

I have no experience with clang (I use gcc on Mac). May be, the add of 
the "explicit" c++ keyword on the definition of the constructors for the 
class
ga_workspace (lines 593 and 595 of src/getfem/getfem_generic_assembly.h) 
could help.

Best regards,

Yves

On 15/04/2021 00:28, Sam Meizlish wrote:
> Hello all,
>
> I'm currently attempting to build getfem for Mac with the current 
> clang (LLVM 9.1.0) and am getting this error:
>
> In file included from 
> getfem_generic_assembly_functions_and_operators.cc:22:
> In file included from ./getfem/getfem_generic_assembly_semantic.h:41:
> In file included from ./getfem/getfem_generic_assembly_tree.h:42:
> In file included from ./getfem/getfem_generic_assembly.h:42:
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/map:629:15: 
> error: object of
>       type 'std::__1::pair<std::__1::basic_string<char>, 
> getfem::ga_workspace::var_description>' cannot be assigned because its
>       copy assignment operator is implicitly deleted
>         {__nc = __v.__cc; return *this;}
>
> (in instantiation of function blah blah, and so on) then:
>
> ./getfem/getfem_generic_assembly.h:263:9: note: in instantiation of 
> member function 'std::__1::map<std::__1::basic_string<char>,
>       getfem::ga_workspace::var_description, 
> std::__1::less<std::__1::basic_string<char> >,
>       std::__1::allocator<std::__1::pair<const 
> std::__1::basic_string<char>, getfem::ga_workspace::var_description> >
>       >::operator=' requested here
>   class ga_workspace {
>
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/utility:325:5: 
> note: copy
>       assignment operator is implicitly deleted because
>       'pair<std::__1::basic_string<char>, 
> getfem::ga_workspace::var_description>' has a user-declared move 
> constructor
>     pair(pair&&) = default;
>
> This seems to occur wherever a ga_workspace object is assigned from 
> using "=", for instance
> local_workspace = gaf.local_workspace;
> (from getfem_generic_assembly_functions_and_operators.cc, line 708). 
> I'm already way out of my depth here but haven't found anything 
> helpful just googling around, nor have I been able to replicate the 
> error from scratch. If anyone has dealt with this or understands what 
> clang is on about, I'd love to hear it!
>
> Thanks,
> Sam


--

  Yves Renard (Yves.Renard@insa-lyon.fr)       tel : (33) 04.72.43.87.08
  INSA-Lyon
  20, rue Albert Einstein
  69621 Villeurbanne Cedex, FRANCE
  http://math.univ-lyon1.fr/~renard

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