Download Bijoux en perles de cristal : Bagues, colliers et autres by Christine Hooghe PDF

By Christine Hooghe

Bijoux en perles de cristal: Bagues, colliers et autres parures scintillantes...

Show description

Read or Download Bijoux en perles de cristal : Bagues, colliers et autres parures scintillantes PDF

Best programming: programming languages books

Harnessing Hibernate

Harnessing Hibernate is a perfect advent to the preferred framework that we could Java builders paintings with details from a relational database simply and successfully. Databases are a really diversified international than Java items, and so they usually contain individuals with diverse talents and specializations. With Hibernate, bridging those worlds is considerably more straightforward, and with this ebook, you may get in control with Hibernate quick.

Additional resources for Bijoux en perles de cristal : Bagues, colliers et autres parures scintillantes

Example text

You consider the required behavior of your class, and match it to the definitions of the basic Symbian OS types. Having chosen a type, you can then concentrate on the role of the class. By the same token, as a client of an unfamiliar class, the naming convention indicates how you are expected to instantiate an object, use it and then destroy it in a leave-safe way. 1 Fundamental Types I’ll discuss the main features of each class type in this chapter. However, before doing so let’s go back to basics and consider the fundamental types.

User::LeaveIfNull() takes a pointer value and leaves with KErrNoMemory if it is NULL. It can sometimes be useful, for example, to enclose a call to a non-leaving function which allocates memory and returns a pointer to that memory or NULL if it is unsuccessful. The following example shows four possible leaves: TInt UseClanger(CClanger* aClanger); CClanger* InitializeClangerL() { CClanger* clanger = new (ELeave) CClanger(); CleanupStack::PushL(clanger); clanger->InitializeL(); User::LeaveIfError(UseClanger(clanger)); CleanupStack::Pop(clanger); return (clanger); } // Forward declaration // // // // (1) (2) (3) (4) Leaves if OOM See Chapter 3 May leave Leaves on error The L suffix is not checked during compilation so occasionally you may forget to append L to a function name, or may later add code to a previously non-leaving function which may then cause it to leave.

If the C class object is not owned, instead being accessed through a local pointer, that pointer must be placed on the cleanup stack prior to calling any code with the potential to leave – otherwise it will be orphaned on the heap in the event of a leave. I’ll discuss this further in Chapter 3. h, you’ll notice that CBase declares a private copy constructor and assignment operator. This is a common strategy used to prevent a client from making accidental shallow copies of, or assignments to, objects of a class.

Download PDF sample

Rated 4.31 of 5 – based on 21 votes