[syntactically]

Previously, the Rust component bindgen would in certain circumstances produce long chains of associated type references, e.g. Self::Foo::Bar::Baz::T. Unfortunately, Rust will not actually accept these without disambiguating syntax indicating from which trait the extern types should be drawn. This commit modifies the relevant logic in emit_resource_ref to walk through the path properly, and then deals with the consequences of that everywhere else.

[Copilot]

Pull request overview

Improves Rust component bindgen codegen so chains of associated types (for nested instance/resource references) are emitted with the necessary trait disambiguation syntax, avoiding invalid paths like Self::Foo::Bar::Baz::T in cases where Rust requires qualified syntax.

Changes:

• Reworked emit_resource_ref to walk the path step-by-step and introduce trait_ref for consistent trait-path emission with instantiated type variables.
• Updated host/guest impl codegen state-path handling to carry trait bounds for nested associated-type projections, and generalized self_param_var to a TokenStream.
• Added a regression coverage module that exercises deeply nested instance/resource paths.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/hyperlight_host/tests/wit_test.rs	Adds a deeply-nested inline component to exercise the problematic associated-type path pattern in host bindgen.
src/hyperlight_component_util/src/rtypes.rs	Implements trait-disambiguated resource-type reference emission and adds trait_ref helper.
src/hyperlight_component_util/src/host.rs	Tracks nested state projections with explicit trait bounds to generate disambiguated associated-type paths in host impl codegen.
src/hyperlight_component_util/src/guest.rs	Aligns guest impl codegen self_param_var handling with the new TokenStream representation and export-trait qualification.
src/hyperlight_component_util/src/emit.rs	Updates State::self_param_var to Option<TokenStream> and documents origin/self-parameter expectations for higher-order components.

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