27 lines
1.2 KiB
Markdown
27 lines
1.2 KiB
Markdown
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# Nyash vs Other Languages — Feature Comparison
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Perspective
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- Nyash emphasizes a unified Box model, hygienic AST macros with sandboxing, and multi‑backend execution (PyVM/LLVM/Cranelift/WASM).
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Axes
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- Control Flow & SSA
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- Nyash: explicit observability (hints), PHI hygiene invariants.
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- Rust/Swift/Kotlin: SSA is internal; limited direct observability.
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- Exceptions
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- Nyash: postfix `catch/cleanup` (scope‑first), zero‑cost lowering.
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- Rust: Result/? idiom (no exceptions). Swift/Kotlin: try/catch/finally.
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- Macros
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- Nyash: AST JSON v0, hygienic by construction, isolated child with capabilities.
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- C: text macro. Rust: macro_rules!/proc‑macros. Lisp/Julia: homoiconic AST.
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- Scope
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- Nyash: ScopeBox (compile‑time metadata) and ScopeEnter/Leave hints; disappears at runtime.
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- Go/Rust/Swift: lexical scopes (no explicit observability layer).
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- Backends
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- Nyash: PyVM (reference semantics), LLVM (AOT), Cranelift (JIT), WASM.
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- Others: single backend or VM.
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Takeaways
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- Nyash’s differentiator is “observability without cost” and macro safety by default.
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- Where trade‑offs exist (e.g., temporary hygiene valves), they’re gated and documented.
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