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Constructing an F# class using Reflection
f#reflection

Hi,

I have a class which I am trying to instantiate through reflection. My C# class constructor is correctly executed but the F# InvokeMember() method fails to load the constructor. I notice that the IL is different.

This is the IL for the F# implementation of the class and constructor:

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.class public auto ansi serializable AggregatingPositionHandler
    extends Export.Position.DefaultPositionHandler
    implements Export.Position.IPositionColumnExtractor
{
    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = {int32(3) }
    .method public specialname rtspecialname instance void .ctor(class Export.Position.PositionExporter exporter, class [ExportCore]Export.GenericObjectConfiguration configuration) cil managed
    {
    }
}

This is the C# implementation:

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.class public auto ansi beforefieldinit AggregatingPositionHandler
    extends Export.Position.DefaultPositionHandler
    implements Export.Position.IPositionColumnExtractor
{
    .method public hidebysig specialname rtspecialname instance void .ctor(class Export.Position.PositionExporter exporter, class Export.GenericObjectConfiguration configuration) cil managed
    {
    }
}

I notice that the class and constructor description attributes differ slightly. Could this be the reason?

Thanks

.

Rather than show the IL, can you share the calling code (that is trying to invoke via reflection), as well as the F# and C# code of the classes/constructors?

By on 10/6/2011 4:37 PM ()

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