comp.lang.c++

On Apr 10, 5:37 pm, Christopher wrote:
> On Apr 10, 4:58 pm, aaragon wrote:
>
>
>
> > Hello everyone,
>
> > I run across this problem:
>
> > I have a project that has a class with a template function, something
> > like the following:
>
> > class SomeClass {
> > ...
> > public:
> > template
> > inline typename PropertyTraits::PropertyType Map() {
> > return boost::get(typename
> > PropertyTraits::PropertyTag(), *g_);
> > }
> > ...
>
> > };
>
> > so you can see that this function takes an enumerated type:
>
> > enum PROPERTY { POINT, WEIGHT};
>
> > // define local classes
> > template
> > class PropertyTraits;
>
> > template
> > struct PropertyTraits {
> > typedef vertex_point_t PropertyTag;
> > typedef typename boost::property_map::type
> > PropertyType;};
>
> > template
> > struct PropertyTraits {
> > typedef edge_weight_t PropertyTag;
> > typedef typename boost::property_map::type
> > PropertyType;
>
> > };
>
> > Now, in some other code, I have a function template that takes as a
> > template parameter an object that can be an object of SomeClass.
>
> > class OtherClass {
> > ...
> > template
> > void operator()(CL& c) {
> > ...
> > mvac_.template Map()
> > ...
> > }
> > ...
>
> > };
>
> > Now, when I do this, the compiler says:
>
> > domain.h:638: error: 'POINT' was not declared in this scope
>
> > and this is ok because I don't want the code of OtherClass to know
> > about any enumerated types or classes in the first project. I tried
> > replacing POINT by 0 and it compiles, but then when I have to compile
> > the original code I have:
>
> > domain.h:638: error: no matching function for call to 'mvac::mVAC3<2,
> > mvac::DomainTraits<2> >::Map()'
>
> > Does anyone knows how can I call this template function? Thank you
> > all,
>
> > aa
>
> Qualify the enumerated type? include the proper file?
> Depends where it is defined... By what you have written I would assume
> with low confidence that it is global? , but then I doubt you would be
> getting the error.
>
> You didn't clearly show where the enum was defined, filenames, or
> where the error occured. I don't know where line 638 is in your pasted
> code.

Ok, the idea is that there are two projects that are completely
independent of each other. As such, the SomeClass is in the first
project, with the enumerated type being global. The other project only
knows about SomeClass through a template parameter, so it can have
access to SomeClass public typedefs and member functions.

aa