The `instantiate` method in `Environment` has been refactored to return
`Result<Rc<Closure>, String>` instead of `Rc<NativeFunction>`. This
change separates the creation of a `Closure` from its execution,
allowing the caller to manage the `VM` lifecycle and choose the
appropriate execution strategy (e.g., single run vs. repeated benchmark
iterations).
The `NativeFunction` type is now exclusively used for true Rust
intrinsics. The benchmark runner has also been updated to reuse a single
`VM` across iterations, improving performance by avoiding repeated VM
allocations.
The `dump_ast` method previously bypassed the `compile` method, which
meant it would silently ignore parsing errors. This commit ensures that
`dump_ast` now delegates to `compile` and correctly propagates any
parsing errors. This aligns the behavior of `dump_ast` with other
compilation steps and provides better feedback to the user.
Fix: Dump AST ignores parse errors
The `dump_ast` method now delegates to `compile(source).into_result()?`
to properly handle and report parse errors, ensuring consistency with
the compilation process.
Brummel