Week7 exception handling

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Exception Handling in C++ ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Fundamental Philosophy ,[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Traditional Exception Handling ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++ Note:– In most large systems, code to handle errors and exceptions represents >80% of the total code of the system

Fundamental Philosophy (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Fundamental Philosophy (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Class exception ,[object Object],[object Object],[object Object],Exception Handling in C++

Example: Handling an Attempt to Divide by Zero Exception Handling in C++

Exception Handling in C++ Zero Divide Example ,[object Object],[object Object]

try Blocks ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Software Engineering Observation ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Catch Handlers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Catch Handlers (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++ All other classes of exceptions are not handled here catch clauses attempted in order; first match wins!

Common Programming Errors ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Fundamental Philosophy (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++ Control does not return to throw point

Stack Unwinding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Observations ,[object Object],[object Object],[object Object],Exception Handling in C++

Throwing an Exception ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Notes ,[object Object],[object Object],Exception Handling in C++

When to Use Exception Handling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++ Don’t use for routine stuff such as end-of-file or null string checking

Software Engineering Notes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Rethrowing an Exception ,[object Object],[object Object],[object Object],Exception Handling in C++

Common Programming Error ,[object Object],[object Object],Exception Handling in C++ See D&D Fig 27.3

Exception Specifications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++ Optional!

Exception Specifications (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Error Note ,[object Object],[object Object],[object Object],Exception Handling in C++

Constructors and Destructors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Note ,[object Object],[object Object],Exception Handling in C++

Exceptions and Inheritance ,[object Object],[object Object],[object Object],Exception Handling in C++

Failure of calls to new ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Standard Library Exception Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Fig. 27.11 | Standard Library exception classes. Exception Handling in C++

Exception Handling Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Exception Handling Summary (continued) ,[object Object],[object Object],[object Object],[object Object],Exception Handling in C++

Week7 exception handling

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Week7 exception handling