[async-iteration] implement Async-from-Sync Iterator

test/cctest/interpreter/generate-bytecode-expectations.cc

Index: test/cctest/interpreter/generate-bytecode-expectations.cc
diff --git a/test/cctest/interpreter/generate-bytecode-expectations.cc b/test/cctest/interpreter/generate-bytecode-expectations.cc
index e5dca853a530073903298d1d3ae148194f3e8764..172a3e9b8fea86b07c25c1d8b2651096391876e4 100644
--- a/test/cctest/interpreter/generate-bytecode-expectations.cc
+++ b/test/cctest/interpreter/generate-bytecode-expectations.cc
@@ -43,6 +43,7 @@ class ProgramOptions final {
         module_(false),
         top_level_(false),
         do_expressions_(false),
+        async_iteration_(false),
         verbose_(false) {}
 
   bool Validate() const;
@@ -61,6 +62,7 @@ class ProgramOptions final {
   bool module() const { return module_; }
   bool top_level() const { return top_level_; }
   bool do_expressions() const { return do_expressions_; }
+  bool async_iteration() const { return async_iteration_; }
   bool verbose() const { return verbose_; }
   bool suppress_runtime_errors() const { return rebaseline_ && !verbose_; }
   std::vector<std::string> input_filenames() const { return input_filenames_; }
@@ -77,6 +79,7 @@ class ProgramOptions final {
   bool module_;
   bool top_level_;
   bool do_expressions_;
+  bool async_iteration_;
   bool verbose_;
   std::vector<std::string> input_filenames_;
   std::string output_filename_;
@@ -165,6 +168,8 @@ ProgramOptions ProgramOptions::FromCommandLine(int argc, char** argv) {
       options.top_level_ = true;
     } else if (strcmp(argv[i], "--do-expressions") == 0) {
       options.do_expressions_ = true;
+    } else if (strcmp(argv[i], "--async-iteration") == 0) {
+      options.async_iteration_ = true;
     } else if (strcmp(argv[i], "--verbose") == 0) {
       options.verbose_ = true;
     } else if (strncmp(argv[i], "--output=", 9) == 0) {
@@ -267,6 +272,8 @@ void ProgramOptions::UpdateFromHeader(std::istream& stream) {
       top_level_ = ParseBoolean(line.c_str() + 11);
     } else if (line.compare(0, 16, "do expressions: ") == 0) {
       do_expressions_ = ParseBoolean(line.c_str() + 16);
+    } else if (line.compare(0, 17, "async iteration: ") == 0) {
+      async_iteration_ = ParseBoolean(line.c_str() + 17);
     } else if (line == "---") {
       break;
     } else if (line.empty()) {
@@ -289,6 +296,7 @@ void ProgramOptions::PrintHeader(std::ostream& stream) const {  // NOLINT
   if (module_) stream << "\nmodule: yes";
   if (top_level_) stream << "\ntop level: yes";
   if (do_expressions_) stream << "\ndo expressions: yes";
+  if (async_iteration_) stream << "\nasync iteration: yes";
 
   stream << "\n\n";
 }
@@ -393,6 +401,7 @@ void GenerateExpectationsFile(std::ostream& stream,  // NOLINT
   }
 
   if (options.do_expressions()) i::FLAG_harmony_do_expressions = true;
+  if (options.async_iteration()) i::FLAG_harmony_async_iteration = true;
 
   stream << "#\n# Autogenerated by generate-bytecode-expectations.\n#\n\n";
   options.PrintHeader(stream);
@@ -401,6 +410,7 @@ void GenerateExpectationsFile(std::ostream& stream,  // NOLINT
   }
 
   i::FLAG_harmony_do_expressions = false;
+  i::FLAG_harmony_async_iteration = false;
 }
 
 bool WriteExpectationsFile(const std::vector<std::string>& snippet_list,
@@ -445,6 +455,7 @@ void PrintUsage(const char* exec_path) {
          "Specify the name of the test function.\n"
          "  --top-level   Process top level code, not the top-level function.\n"
          "  --do-expressions  Enable harmony_do_expressions flag.\n"
+         "  --async-iteration  Enable harmony_async_iteration flag.\n"
          "  --output=file.name\n"
          "      Specify the output file. If not specified, output goes to "
          "stdout.\n"