Re: C2275 compiler error under VS C/C++ 6.0
On Tue, 18 Dec 2007 00:35:17 -0500, Pops <notreal@placebo.com> wrote:
I'm wondering if a C/C++ guru can assist me with this. The code below
is part of SDK example that compiles under VS 2005, but I am pulling out
parts that I need for my VS 6.0 application and I'm getting the
compiling error:
C2275: 'File' : illegal use of this type as an expression
at the line indicated below: I stripped it down to the following:
template <class T>
class XMLCollection {
public:
};
struct File {
};
class ReadCollection {
private:
template <class T>
const XMLCollection<T> getCollection() const {
return XMLCollection<T>();
}
public:
typedef XMLCollection<File> FileList;
const FileList excludeFiles() const {
return getCollection<File>(); //<<< C2275 compiler error
}
};
What changes I need to make this make this compile under VS C/C++ 6.0?
VC6 has very spotty member template support, and there is no reason for
that function to be a non-static member. You need to make that member
function a non-static member or non-member, but then you're subject to the
VC6 (and 7.0?) bug affecting template parameters that aren't represented in
the function parameter list; the solution to that is to write the function
as:
template <class T>
const XMLCollection<T>
getCollection(T* = 0) const
{
return XMLCollection<T>();
}
Perhaps the best solution is to get rid of this superfluous function and
just write XMLColllection<T>() wherever you would call it. I mean, the
function hardly saves you anything! But wait, you actually have a typedef,
so this should be written:
const FileList
excludeFiles() const
{
return FileList();
}
Thanks in advance.
You're retroactively welcome?
--
Doug Harrison
Visual C++ MVP
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