CDumpContext Class

Article
04/28/2015

Supports stream-oriented diagnostic output in the form of human-readable text.

class CDumpContext

Members

Public Constructors

Name	Description
CDumpContext::CDumpContext	Constructs a CDumpContext object.

Public Methods

Name	Description
CDumpContext::DumpAsHex	Dumps the indicated item in hexadecimal format.
CDumpContext::Flush	Flushes any data in the dump context buffer.
CDumpContext::GetDepth	Gets an integer corresponding to the depth of the dump.
CDumpContext::HexDump	Dumps bytes contained in an array in hexadecimal format.
CDumpContext::SetDepth	Sets the depth of the dump.

Public Operators

Name	Description
CDumpContext::operator <<	Inserts variables and objects into the dump context.

Remarks

CDumpContext does not have a base class.

You can use afxDump, a predeclared CDumpContext object, for most of your dumping. The afxDump object is available only in the Debug version of the Microsoft Foundation Class Library.

Several of the memory diagnostic services use afxDump for their output.

Under the Windows environment, the output from the predefined afxDump object, conceptually similar to the cerr stream, is routed to the debugger via the Windows function OutputDebugString.

The CDumpContext class has an overloaded insertion (<<) operator for CObject pointers that dumps the object's data. If you need a custom dump format for a derived object, override CObject::Dump. Most Microsoft Foundation classes implement an overridden Dump member function.

Classes that are not derived from CObject, such as CString, CTime, and CTimeSpan, have their own overloaded CDumpContext insertion operators, as do often-used structures such as CFileStatus, CPoint, and CRect.

If you use the IMPLEMENT_DYNAMIC or IMPLEMENT_SERIAL macro in the implementation of your class, then CObject::Dump will print the name of your CObject-derived class. Otherwise, it will print CObject.

The CDumpContext class is available with both the Debug and Release versions of the library, but the Dump member function is defined only in the Debug version. Use #ifdef _DEBUG / #endif statements to bracket your diagnostic code, including your custom Dump member functions.

Before you create your own CDumpContext object, you must create a CFile object that serves as the dump destination.

For more information on CDumpContext, see Debugging MFC Applications.

#define _DEBUG

Inheritance Hierarchy

CDumpContext

Requirements

Header: afx.h

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