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'function' cannot be generated in managed code: 'message'; compile with /clr to generate a mixed image
Remarks
This error will occur when types not supported by managed code are used within a pure common language runtime (CLR) environment. Compile with /clr to resolve the error.
The /clr:pure and /clr:safe compiler options are deprecated in Visual Studio 2015 and unsupported in Visual Studio 2017.
Example
The following sample generates C2472.
// C2472.cpp
// compile with: /clr:pure
// C2472 expected
#include <cstdlib>
int main()
{
int * __ptr32 p32;
int * __ptr64 p64;
p32 = (int * __ptr32)malloc(4);
p64 = p32;
}