Function makeMemberStructWrapper

sqlite-wasm-cos/sqlite3-node.mjs:10400–10446

(ctor, name, si)

     freed, as such.
  */
  const makeMemberStructWrapper = function callee(ctor, name, si){
    /**
       Where we store inner-struct member proxies. Keys are a
       combination of the parent object's pointer address and the
       property's name. The values are StructType instances.
    */
    const __innerStructs = (callee.innerStructs ??= new Map());
    const key = ctor.memberKey(name);
    if( undefined!==si.signature ){
      toss("'signature' cannot be used on an embedded struct (",
           ctor.structName,".",key,").");
    }
    if( memberSetterProxy(si) ){
      toss("'set' and 'adaptSet' are not permitted for nested struct members.");
    }
    //console.warn("si =",ctor.structName, name, JSON.stringify(si,'  '));
    si.structName ??= ctor.structName+'::'+name;
    si.key = key;
    si.name = name;
    si.constructor = this.call(this, si.structName, si);
    //console.warn("si.constructor =",si.constructor);
    //console.warn("si =",si,"ctor=",ctor);
    const getterProxy = memberGetterProxy(si);
    const prop = Object.assign(Object.create(null),{
      configurable: false,
      enumerable: false,
      set: __propThrowOnSet(ctor/*not si.constructor*/.structName, key),
      get: function(){
        const dbg = this.debugFlags.__flags;
        const p = this.pointer;
        const k = p+'.'+key;
        let s = __innerStructs.get(k);
        if(dbg.getter){ log("debug.getter: k =",k); }
        if( !s ){
          s = new si.constructor(__ptrAdd(p, si.offset));
          __innerStructs.set(k, s);
          this.addOnDispose(()=>s.dispose());
          s.addOnDispose(()=>__innerStructs.delete(k));
          //console.warn("Created",k,"proxy");
        }
        if(getterProxy) s = getterProxy.apply(this,[s,key]);
        if(dbg.getter) log("debug.getter: result =",s);
        return s;
      }
    });
    Object.defineProperty(ctor.prototype, key, prop);
  }/*makeMemberStructWrapper()*/;

  /**
     This is where most of the magic happens.