Index: src/ast/compile-time-value.h |
diff --git a/src/ast/compile-time-value.h b/src/ast/compile-time-value.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..27351b79cc0b3784063b3757c46c5f26170e8c0c |
--- /dev/null |
+++ b/src/ast/compile-time-value.h |
@@ -0,0 +1,45 @@ |
+// Copyright 2015 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. |
+ |
+#ifndef V8_AST_COMPILE_TIME_VALUE |
+#define V8_AST_COMPILE_TIME_VALUE |
+ |
+#include "src/allocation.h" |
+#include "src/globals.h" |
+ |
+namespace v8 { |
+namespace internal { |
+ |
+class Expression; |
+ |
+// Support for handling complex values (array and object literals) that |
+// can be fully handled at compile time. |
+class CompileTimeValue : public AllStatic { |
+ public: |
+ enum LiteralType { |
+ OBJECT_LITERAL_FAST_ELEMENTS, |
+ OBJECT_LITERAL_SLOW_ELEMENTS, |
+ ARRAY_LITERAL |
+ }; |
+ |
+ static bool IsCompileTimeValue(Expression* expression); |
+ |
+ // Get the value as a compile time value. |
+ static Handle<FixedArray> GetValue(Isolate* isolate, Expression* expression); |
+ |
+ // Get the type of a compile time value returned by GetValue(). |
+ static LiteralType GetLiteralType(Handle<FixedArray> value); |
+ |
+ // Get the elements array of a compile time value returned by GetValue(). |
+ static Handle<FixedArray> GetElements(Handle<FixedArray> value); |
+ |
+ private: |
+ static const int kLiteralTypeSlot = 0; |
+ static const int kElementsSlot = 1; |
+}; |
+ |
+} // namespace internal |
+} // namespace v8 |
+ |
+#endif // V8_AST_COMPILE_TIME_VALUE |