32 lines
1.2 KiB
Markdown
32 lines
1.2 KiB
Markdown
|
Index Operator in Hakorune Compiler (selfhost)
|
|||
|
|
|
|||
|
|
Scope
|
|||
|
|
- Bring Hako-side behavior up to parity with Rust parser/MIR builder for Phase‑20.31.
|
|||
|
|
|
|||
|
|
User-facing spec (Phase‑1)
|
|||
|
|
- Read: expr[index] for Array/Map
|
|||
|
|
- Write: expr[index] = value for Array/Map
|
|||
|
|
- String indexing/ranges: out of scope in Phase‑1
|
|||
|
|
- Unsupported receiver: Fail‑Fast with a stable diagnostic
|
|||
|
|
|
|||
|
|
Required changes (Hako compiler)
|
|||
|
|
- Parser
|
|||
|
|
- Add IndexExpr(target, index)
|
|||
|
|
- Permit Assign(IndexExpr, value) on LHS
|
|||
|
|
- Lowering (MIR emit)
|
|||
|
|
- Array: index read/write → BoxCall("get"/"set") on ArrayBox
|
|||
|
|
- Map: index read/write → BoxCall("get"/"set") on MapBox
|
|||
|
|
- Optional (AOT): dotted extern mapping remains as today (nyash.array.get_h, nyash.map.set_hh …)
|
|||
|
|
- Diagnostics
|
|||
|
|
- If receiver type cannot be resolved to ArrayBox/MapBox, emit: "index operator is only supported for Array/Map"
|
|||
|
|
|
|||
|
|
Smokes (opt‑in, external HAKO_BIN)
|
|||
|
|
- tools/smokes/v2/profiles/quick/core/index_operator_hako.sh
|
|||
|
|
- Requires HAKO_BIN; skips with WARN when missing
|
|||
|
|
- Canaries: array read/write, map rw, negative string
|
|||
|
|
|
|||
|
|
Rollout
|
|||
|
|
- No flags are required; follow Rust side semantics.
|
|||
|
|
- Keep Phase‑2 (String/range) for later work.
|
|||
|
|
|