Improve operator resolution

[Vipul-Cariappa]

GetMethodTemplate now also checks for operators methods using GetClassOperators
GetGlobalOperator can now handle templated types

Fixes 2 tests. Along with compiler-research/CppInterOp#509, fixes 3 tests.

[vgvassilev]

LGTM!

[Vipul-Cariappa]

@vgvassilev, something is failing with cling. Call to gbl.Cpp.Declare(code) fails. But if I force it to compile an empty string before compiling the actual code, it passes.
Any ideas, on what might be causing this? I suspect we need to do something in InterOp.

[vgvassilev]

@vgvassilev, something is failing with cling. Call to gbl.Cpp.Declare(code) fails. But if I force it to compile an empty string before compiling the actual code, it passes. Any ideas, on what might be causing this? I suspect we need to do something in InterOp.

Maybe Declare just parses and does not do jit and some previous call needed to be finalized or something like that?

[vgvassilev]

This is something we can fold into an API: const char * GetOperatorKindAsString(Cpp::OperatorKind K);