Introduce LanguageMode, drop StrictMode.

src/scopes.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/v8.h"
 
 #include "src/scopes.h"
 
 #include "src/accessors.h"
 #include "src/bootstrapper.h"
@@ skipping 147 matching lines @@
   scope_inside_with_ = false;
   scope_contains_with_ = false;
   scope_calls_eval_ = false;
   scope_uses_arguments_ = false;
   scope_uses_super_property_ = false;
   scope_uses_super_constructor_call_ = false;
   scope_uses_this_ = false;
   asm_module_ = false;
   asm_function_ = outer_scope != NULL && outer_scope->asm_module_;
   // Inherit the strict mode from the parent scope.
-  strict_mode_ = outer_scope != NULL ? outer_scope->strict_mode_ : SLOPPY;
+  language_mode_ = outer_scope != NULL ? outer_scope->language_mode_ : SLOPPY;
   outer_scope_calls_sloppy_eval_ = false;
   inner_scope_calls_eval_ = false;
   inner_scope_uses_arguments_ = false;
   inner_scope_uses_this_ = false;
   inner_scope_uses_super_property_ = false;
   inner_scope_uses_super_constructor_call_ = false;
   force_eager_compilation_ = false;
   force_context_allocation_ = (outer_scope != NULL && !is_function_scope())
       ? outer_scope->has_forced_context_allocation() : false;
   num_var_or_const_ = 0;
   num_stack_slots_ = 0;
   num_heap_slots_ = 0;
   num_modules_ = 0;
   module_var_ = NULL,
   rest_parameter_ = NULL;
   rest_index_ = -1;
   scope_info_ = scope_info;
   start_position_ = RelocInfo::kNoPosition;
   end_position_ = RelocInfo::kNoPosition;
   if (!scope_info.is_null()) {
     scope_calls_eval_ = scope_info->CallsEval();
-    strict_mode_ = scope_info->strict_mode();
+    language_mode_ = scope_info->language_mode();
   }
 }
 
 
 Scope* Scope::DeserializeScopeChain(Isolate* isolate, Zone* zone,
                                     Context* context, Scope* script_scope) {
   // Reconstruct the outer scope chain from a closure's context chain.
   Scope* current_scope = NULL;
   Scope* innermost_scope = NULL;
   bool contains_with = false;
@@ skipping 681 matching lines @@
   if (function_ != NULL) {
     Indent(n1, "// (local) function name: ");
     PrintName(function_->proxy()->raw_name());
     PrintF("\n");
   }
 
   // Scope info.
   if (HasTrivialOuterContext()) {
     Indent(n1, "// scope has trivial outer context\n");
   }
-  if (strict_mode() == STRICT) {
+  if (is_strict(language_mode())) {
     Indent(n1, "// strict mode scope\n");
   }
   if (scope_inside_with_) Indent(n1, "// scope inside 'with'\n");
   if (scope_contains_with_) Indent(n1, "// scope contains 'with'\n");
   if (scope_calls_eval_) Indent(n1, "// scope calls 'eval'\n");
   if (scope_uses_arguments_) Indent(n1, "// scope uses 'arguments'\n");
   if (scope_uses_super_property_)
     Indent(n1, "// scope uses 'super' property\n");
   if (scope_uses_super_constructor_call_)
     Indent(n1, "// scope uses 'super' constructor\n");
@@ skipping 381 matching lines @@
     // parameters, which is why we don't need to allocate an arguments
     // object in that case.
 
     // We are using 'arguments'. Tell the code generator that is needs to
     // allocate the arguments object by setting 'arguments_'.
     arguments_ = arguments;
 
     // In strict mode 'arguments' does not alias formal parameters.
     // Therefore in strict mode we allocate parameters as if 'arguments'
     // were not used.
-    uses_sloppy_arguments = strict_mode() == SLOPPY;
+    uses_sloppy_arguments = !is_strict(language_mode());
   }
 
   if (rest_parameter_ && !MustAllocate(rest_parameter_)) {
     rest_parameter_ = NULL;
   }
 
   // The same parameter may occur multiple times in the parameters_ list.
   // If it does, and if it is not copied into the context object, it must
   // receive the highest parameter index for that parameter; thus iteration
   // order is relevant!
@@ skipping 134 matching lines @@
 }
 
 
 int Scope::ContextLocalCount() const {
   if (num_heap_slots() == 0) return 0;
   return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
       (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0);
 }
 
 } }  // namespace v8::internal