Directly enter the parsing mode in DoParseProgram

src/parsing/parser.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/parsing/parser.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/ast/ast-expression-rewriter.h"
@@ skipping 765 matching lines @@
 }
 
 
 FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
   // Note that this function can be called from the main thread or from a
   // background thread. We should not access anything Isolate / heap dependent
   // via ParseInfo, and also not pass it forward.
   DCHECK_NULL(scope_state_);
   DCHECK_NULL(target_stack_);
 
-  Mode parsing_mode = allow_lazy() ? PARSE_LAZILY : PARSE_EAGERLY;
+  ParsingModeScope mode(this, allow_lazy() ? PARSE_LAZILY : PARSE_EAGERLY);
 
   FunctionLiteral* result = NULL;
   {
     Scope* outer = original_scope_;
     DCHECK_NOT_NULL(outer);
     parsing_module_ = info->is_module();
     if (info->is_eval()) {
       outer = NewEvalScope(outer);
     } else if (parsing_module_) {
       DCHECK_EQ(outer, info->script_scope());
       outer = NewModuleScope(info->script_scope());
     }
 
     DeclarationScope* scope = outer->AsDeclarationScope();
 
     scope->set_start_position(0);
 
-    // Enter 'scope' with the given parsing mode.
-    ParsingModeScope parsing_mode_scope(this, parsing_mode);
     FunctionState function_state(&function_state_, &scope_state_, scope);
 
     ZoneList<Statement*>* body = new(zone()) ZoneList<Statement*>(16, zone());
     bool ok = true;
     int beg_pos = scanner()->location().beg_pos;
     if (parsing_module_) {
       // Declare the special module parameter.
       auto name = ast_value_factory()->empty_string();
       bool is_duplicate;
       bool is_rest = false;
@@ skipping 4632 matching lines @@
 
   return final_loop;
 }
 
 #undef CHECK_OK
 #undef CHECK_OK_VOID
 #undef CHECK_FAILED
 
 }  // namespace internal
 }  // namespace v8