JavaScript is required to for searching.
Skip Navigation Links
Exit Print View
Oracle Solaris Studio 12.3: C++ User's Guide     Oracle Solaris Studio 12.3 Information Library
search filter icon
search icon

Document Information


Part I C++ Compiler

1.  The C++ Compiler

2.  Using the C++ Compiler

3.  Using the C++ Compiler Options

Part II Writing C++ Programs

4.  Language Extensions

4.1 Linker Scoping

4.1.1 Compatibility with Microsoft Windows

4.2 Thread-Local Storage

4.3 Overriding With Less Restrictive Virtual Functions

4.4 Making Forward Declarations of enum Types and Variables

4.5 Using Incomplete enum Types

4.6 Using an enum Name as a Scope Qualifier

4.7 Using Anonymous struct Declarations

4.8 Passing the Address of an Anonymous Class Instance

4.9 Declaring a Static Namespace-Scope Function as a Class Friend

4.10 Using the Predefined __func__ Symbol for Function Name

4.11 Supported Attributes

4.11.1 __packed__ Attribute Details

4.12 Compiler Support for Intel MMX and Extended x86 Platform Intrinsics

5.  Program Organization

6.  Creating and Using Templates

7.  Compiling Templates

8.  Exception Handling

9.  Improving Program Performance

10.  Building Multithreaded Programs

Part III Libraries

11.  Using Libraries

12.  Using the C++ Standard Library

13.  Using the Classic iostream Library

14.  Building Libraries

Part IV Appendixes

A.  C++ Compiler Options

B.  Pragmas



4.8 Passing the Address of an Anonymous Class Instance

You are not allowed to take the address of a temporary variable. For example, the following code is invalid because it takes the address of a variable created by a constructor call. However, the compiler accepts this invalid code when you use the -features=extensions option.

class C {
void f1(C*);
int main()
  f1(&C(2)); // invalid

Note that you can make this code valid by using an explicit variable.

C c(2);

The temporary object is destroyed when the function returns. Ensuring that the address of the temporary variable is not retained is the programmer’s responsibility. In addition, the data that is stored in the temporary variable (for example, by f1) is lost when the temporary variable is destroyed.