10.1 Introduction

The Essential Tools Module uses the same extensive error handling facility and also offers a complete framework for reporting errors through exceptions. This chapter presents the Essential Tools Module's error model and its error reporting classes, and includes suggestions on how to implement them.

The Essential Tools Module error model explained in Section 10.2 divides errors into two broad categories: internal and external.

The Essential Tools Module error-reporting classes explained in Section 10.3 create a framework for reporting errors through exceptions, and for reporting errors in environments in which exceptions are not enabled.

This chapter discusses

• Error Categories

• Section 10.2.1, "The Essential Tools Module Error Model,"

• Section 10.2.2, "Internal Errors,"

• Section 10.2.3, "External Errors,"

• Error Reporting and Error Handling

• Section 10.3.1, "Essential Tools Module Exception Architecture."

• The Debug Version of the Essential Tools Module

• Section 10.4.1, "RW_PRECONDITION and RW_POSTCONDITION."

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