you can now write TL serializers in PHP, runtime will call custom PHP code for that

[hrissan]

function for tests between C++ and PHP serializers. Will be removed together with C++ serializers.

tests_typed_rpc_tl_query_store
tests_typed_rpc_tl_query_result_store
tests_typed_rpc_tl_query_result_fetch

Functions called by C++ serializers, made public for PHP serializers. These functions will be moved into serialization context later together with parsing functions.

function set_last_stored_tl_function_magic ($magic ::: int);
function set_current_tl_function($name ::: string);
function raise_fetching_error($text ::: string);
function raise_storing_error($text ::: string);

Functions to implement by PHP serializers.

interface RpcFunction {
...
  public function customStore() : RpcFunctionFetcher;
  public function customFetch() : RpcFunctionFetcher;

They should either store/fetch function and return instance of RpcFunctionFetcher, or do nothing and return null, in this case runtime will call C++ serializer.

interface RpcFunctionFetcher {
  public function typedFetch() : @tl\RpcFunctionReturnResult;
  public function typedStore($result ::: @tl\RpcFunctionReturnResult);
}