Using a vector of structs in a struct in c++/cx

Question

I have a header file defining some structs I want to use in my code.

public value struct HttpHeader
{
   Platform::String^ mName;
   Platform::String^ mValue;

};
typedef Platform::Collections::Vector<HttpHeader> HttpHeaders;

public value struct HttpRequestEvent
{
   Platform::String^ mUri;
   HttpHeaders^ mHeaders;
};

When I build this I get this error:

error C3986: 'mHeaders': signature of public member contains native type 'std::equal_to<_Ty>'
      with
      [
          _Ty=cpcpb::HttpHeader
      ] (SettingsServiceImpl.cpp)

What am I missing here? Isn't everything I'm using C++/Cx?

Superman · Accepted Answer · 2012-08-02 02:52:28Z

6

Use Windows::Foundation::Collections::IVector instead of Platform::Collections::Vector.

To use Platform::Collections::Vector you have to provide a custom comparator which is the equals operator.

Check this link - http://social.msdn.microsoft.com/Forums/en-US/winappswithnativecode/thread/5ec2090f-b7e6-40e8-9cd7-75cf36d05ab3/

edited Aug 2, 2012 at 2:52

answered Aug 2, 2012 at 2:45

Superman

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3 Comments

Andy Rich Over a year ago

Futhermore, in C++/Cx, value types (value struct/value class) should only contain fundamental types, String^, and other value types. Other types are not permitted (at least by the RTM compiler, it is possible that with earlier releases the compiler incorrectly permits this).

Jippers Over a year ago

So because IVector is not a fundamental type, my HttpRequestEvent struct isn't allowed. Is there a way to have a vector in a value struct then?

Andy Rich Over a year ago

I do not believe there is a way to accomplish this. Is there a reason you cannot make HttpReqeustEvent a ref struct/class?

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