hakorune/lang/src/vm/opt/vm_hot_path.hako

// vm_hot_path.hako — VMHotPathBox (v0 skeleton)
// Gate: HAKO_VM_FAST_PATH=1 で将来のホットパス最適化を有効化（現状は no-op）。

static box VMHotPathBox {
  enabled() {
    // Accept HAKO_VM_FAST_PATH=1|true|on (case-insensitive)
    local v = env.get("HAKO_VM_FAST_PATH")
    if !v { return 0 }
    local l = v.toLowerCase()
    if l == "1" || l == "true" || l == "on" { return 1 }
    return 0
  }
  // Entry point (reserved): future hook to prebuild maps or inject superinstructions (dev only)
  prep() {
    if !VMHotPathBox.enabled() { return 0 }
    // v0: no-op; keep structure for future expansions
    return 0
  }
}