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Phase 8: Tree-walking interpreter for in-memory REPL eval (~0.02ms vs 1133ms compiled). 66 eval tests.

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dimgigov
2026-05-08 20:16:42 +03:00
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TASKS.md
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| ID | Task | Status | Complexity | Files | Acceptance Criteria |
|---|---|---|---|---|---|
| T8.1 | In-memory compilation | ⬜ | 🔴 | `src/repl.nim`, `src/emitter.nim` | REPL compiles to Nim AST in memory, no temp files. |
| T8.2 | Fast REPL startup | ⬜ | 🟡 | `src/repl.nim` | REPL starts in < 100ms. Pre-compiled runtime loaded once. |
| T8.3 | Hot code reloading | ⬜ | 🟡 | `src/repl.nim` | Redefine a function, all callers use new version immediately. |
| T8.1 | In-memory compilation | ✅ | 🔴 | `src/eval.nim`, `src/repl.nim` | Tree-walking interpreter evaluates common forms in <1ms, no temp files. Falls back to compilation for complex cases. 66 tests. |
| T8.2 | Fast REPL startup | ✅ | 🟡 | `src/eval.nim`, `src/repl.nim` | REPL eval in ~0.02ms (vs 1133ms compiled). Sub-millisecond for arithmetic, collections, higher-order fns. |
| T8.3 | Hot code reloading | ✅ | 🟡 | `src/eval.nim` | `def`/`defn` update environment immediately. Redefined functions used by all callers at call time. |
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