Expose APIs for detecting boxed primitives, native errors and Math.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index fb10c71576da0a92963b4decfe4dde60067a34fb..435486a147b6030ede454847c8bcb10ac3cf8cd5 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -80,9 +80,11 @@ namespace v8 {
 
 class Context;
 class String;
+class StringObject;
 class Value;
 class Utils;
 class Number;
+class NumberObject;
 class Object;
 class Array;
 class Int32;
@@ -90,6 +92,7 @@ class Uint32;
 class External;
 class Primitive;
 class Boolean;
+class BooleanObject;
 class Integer;
 class Function;
 class Date;
@@ -929,6 +932,26 @@ class Value : public Data {
   V8EXPORT bool IsDate() const;
 
   /**
+   * Returns true if this value is an instance of the Boolean constructor.

[Vyacheslav Egorov (Chromium), 2011/07/13 09:10:17]

I suggest clearer wording:

"Returns true if this value is XXX object"

notion of XXX object is defined in ECMA-262 (e.g.
http://es5.github.com/#x4.3.15).

+   */
+  V8EXPORT bool IsBooleanObject() const;
+
+  /**
+   * Returns true if this value is an instance of the Number constructor.
+   */
+  V8EXPORT bool IsNumberObject() const;
+
+  /**
+   * Returns true if this value is an instance of the String constructor.
+   */
+  V8EXPORT bool IsStringObject() const;
+
+  /**
+   * Returns true if this value is a NativeError.
+   */
+  V8EXPORT bool IsNativeError() const;
+
+  /**
    * Returns true if this value is a RegExp.
    */
   V8EXPORT bool IsRegExp() const;
@@ -1745,6 +1768,65 @@ class Date : public Object {
 
 
 /**
+ * An instance of the built-in Number constructor (ECMA-262, 15.7).
+ */
+class NumberObject : public Object {
+ public:
+  V8EXPORT static Local<Value> New(double value);
+
+  /**
+   * A specialization of Value::NumberValue that is more efficient
+   * because we know the structure of this object.
+   */
+  V8EXPORT double NumberValue() const;
+
+  static inline NumberObject* Cast(v8::Value* obj);
+
+ private:
+  V8EXPORT static void CheckCast(v8::Value* obj);
+};
+
+
+/**
+ * An instance of the built-in Boolean constructor (ECMA-262, 15.6).
+ */
+class BooleanObject : public Object {
+ public:
+  V8EXPORT static Local<Value> New(bool value);
+
+  /**
+   * A specialization of Value::BooleanValue that is more efficient
+   * because we know the structure of this object.
+   */
+  V8EXPORT bool BooleanValue() const;
+
+  static inline BooleanObject* Cast(v8::Value* obj);
+
+ private:
+  V8EXPORT static void CheckCast(v8::Value* obj);
+};
+
+
+/**
+ * An instance of the built-in String constructor (ECMA-262, 15.5).
+ */
+class StringObject : public Object {
+ public:
+  V8EXPORT static Local<Value> New(Handle<String> value);
+
+  /**
+   * Returns the String held by the object.
+   */
+  V8EXPORT Local<String> StringValue() const;
+
+  static inline StringObject* Cast(v8::Value* obj);
+
+ private:
+  V8EXPORT static void CheckCast(v8::Value* obj);
+};
+
+
+/**
  * An instance of the built-in RegExp constructor (ECMA-262, 15.10).
  */
 class RegExp : public Object {
@@ -4035,6 +4117,30 @@ Date* Date::Cast(v8::Value* value) {
 }
 
 
+StringObject* StringObject::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<StringObject*>(value);
+}
+
+
+NumberObject* NumberObject::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<NumberObject*>(value);
+}
+
+
+BooleanObject* BooleanObject::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<BooleanObject*>(value);
+}
+
+
 RegExp* RegExp::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);