Function build_sub_env

crates/kernel/src/anon_work.rs:278–302

(
  source: &IxonEnv,
  roots: &[Address],
)

  // names section, so each key's component chain must be interned too.
  fn intern_chain(sub: &IxonEnv, name: &ix_common::env::Name) {
    let addr = Address::from_blake3_hash(*name.get_hash());
    if sub.get_name(&addr).is_some() {
      return;
    }
    match name.as_data() {
      NameData::Anonymous(_) => {},
      NameData::Str(parent, _, _) | NameData::Num(parent, _, _) => {
        intern_chain(sub, parent);
      },
    }
    sub.store_name(addr, name.clone());
  }
  for e in full.named.iter() {
    if sub.get_const(&e.value().addr).is_some() {
      intern_chain(&sub, e.key());
      sub.register_name(
        e.key().clone(),
        ixon::env::Named::with_addr(e.value().addr.clone()),
      );
    }
  }
  let mut buf = Vec::new();
  sub.put(&mut buf).map_err(|e| format!("sub-env serialize: {e}"))?;
  Ok(buf)
}

/// The ingress-block address that owns `addr`: a projection (IPrj/CPrj/RPrj/
/// DPrj) maps to its Muts `block`; anything else is its own block. Used to map