[Rust][Feat] Add match_any! for object-backed values

[tlopex]

This PR adds Rust match_any!, a Phase 1 macro that evaluates an Any-compatible scrutinee once, converts it to AnyView, and tries object-backed target conversions in source order using the existing standard TryInto/TryFrom implementations. The first successful conversion whose optional guard passes selects its arm; a failed conversion or guard continues to the next arm, while a required final _ handles non-object or unmatched values. This implementation intentionally does not add type-index dispatch tables, caches, custom pattern protocols, or heuristic dispatch.

match_any! {
    value {
        Tensor(tensor)
            if tensor.shape().len() == 2 => ("matrix", tensor.shape().len()),
        Tensor(tensor) => ("tensor", tensor.shape().len()),
        Shape(shape) => ("shape", shape.len()),
        Array::<i64>(array) => ("array", array.len()),
        _ => ("unsupported", 0),
    }
}

[gemini-code-assist]

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[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[Copilot]

Pull request overview

Adds a new Rust match_any! procedural macro to support source-ordered, object-only dispatch over values carried by Any/AnyView/object handles, and wires it into the tvm_ffi public API with initial tests.

Changes:

• Introduces match_any! macro in tvm-ffi-macros with parsing + expansion for ordered typed arms and required _ fallback.
• Re-exports the macro from tvm_ffi and adds an AnyView conversion helper to support borrowed AnyView scrutinees.
• Adds an integration test covering source-order behavior across several object container types.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
rust/tvm-ffi/tests/test_match_any.rs	New integration test validating ordered dispatch across common object containers.
rust/tvm-ffi/src/lib.rs	Re-exports match_any from tvm_ffi_macros at the crate root.
rust/tvm-ffi/src/any.rs	Adds From<&AnyView> for AnyView to support borrowed AnyView scrutinees.
rust/tvm-ffi-macros/src/utils.rs	Refines “local crate vs external crate” detection for macro expansion.
rust/tvm-ffi-macros/src/match_any.rs	Implements the match_any! proc-macro parser and code generator.
rust/tvm-ffi-macros/src/lib.rs	Exposes the new match_any proc macro and documents intended semantics.

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[tlopex]

cc @tqchen