Extract gen_output_begin_once from gen_output_begin.

2 files changed, 2 insertions, 0 deletions

diff --git a/tdtl/td/tl/tl_generate.cpp b/tdtl/td/tl/tl_generate.cpp
index 66d0dcee6..a3d0fd5d5 100644
--- a/tdtl/td/tl/tl_generate.cpp
+++ b/tdtl/td/tl/tl_generate.cpp
@@ -768,6 +768,7 @@ void write_tl(const tl_config &config, tl_outputer &out, const TL_writer &w) {
   find_complex_types(config, w);
 
   out.append(w.gen_output_begin());
+  out.append(w.gen_output_begin_once());
 
   std::set<std::string> request_types;
   std::set<std::string> result_types;
diff --git a/tdtl/td/tl/tl_writer.h b/tdtl/td/tl/tl_writer.h
index 66dbdd1f5..cce63bf8e 100644
--- a/tdtl/td/tl/tl_writer.h
+++ b/tdtl/td/tl/tl_writer.h
@@ -84,6 +84,7 @@ class TL_writer {
   virtual std::string gen_int_const(const tl_tree *tree_c, const std::vector<var_description> &vars) const = 0;
 
   virtual std::string gen_output_begin() const = 0;
+  virtual std::string gen_output_begin_once() const = 0;
   virtual std::string gen_output_end() const = 0;
 
   virtual std::string gen_import_declaration(const std::string &name, bool is_system) const = 0;