c# - How do I create a `ITypeElement` with represents a closed generic type in a ReSharper plugin? -

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i'm using resharper 8 sdk , want find inheritors of particular generic interface, generic type particular type. have asked more general question got of way there, able find implementation of icommandhandler<t> , not 1 implementation want, icommandhandler<testcommand>

this code have:

foreach (var psimodule in declaredelement.getpsiservices().modules.getmodules()) {     ideclaredtype generictype = typefactory.createtypebyclrname("handlernavigationtest.icommandhandler`1", psimodule, theclass.resolvecontext);     var generictypeelement = generictype.gettypeelement();     if (generictypeelement != null)     {                             var thetype = typefactory.createtype(originaltypeelement);         var commandhandlertype = typefactory.createtype(generictypeelement,thetype);         var handlertypeelement = commandhandlertype.gettypeelement();         solution.getpsiservices().finder.findinheritors(handlertypeelement, searchdomainfactory.createsearchdomain(solution, true),         inheritorsconsumer, nullprogressindicator.instance);         var inheritedinstance= inheritorsconsumer.foundelements.first();         var sourcefile = inheritedinstance.getsourcefiles().first();     } }

if tooltip commandhandlertype after line:

var commandhandlertype = typefactory.createtype(generictypeelement,thetype);

i see type correctly specified:

generic type exists!

but when itypeelement type pass search using line 

var handlertypeelement = commandhandlertype.gettypeelement();

i seem have lost type:

generic type lost!

and search finds implementations of icommandhandler<t>.

so question is, how create itypeelement represents closed generic type want search for?

or alternatively: how can search returned collection of inheritors type has class started generic type parameter?

ah, makes sense. itypeelement instance of ideclaredelement, means it's has declaration - such class or interface declaration. when itype represents closed generic, it's made of itypeelement represents generic type (icommandhandler) , isubstitution represents resolved generic type parameters (anothercommand). when call itype.gettypeelement(), return type element part of type element/substitution pair, open generic declared element (because interface declaration can ever open).

i think might have take alternative approach, , find inheritors (implementors) of itypehandler<t> , filter them down in consumer. findresult passed consumer can downcast findresultinheritedelement, give declared element represents class implements itypehandler<t>. should able walk these elements' interfaces see implement, , accept find results implement correct t. think typeelementutil here super types (base types + interfaces) of declared element.


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