CodeView Does Not Use Default Arguments for Functions (85510)

SUMMARY

Microsoft CodeView versions 4.0 and later, which support debugging C++ programs, do not correctly evaluate functions that use default arguments. When an expression is used that requires CodeView to evaluate a function with a default argument, the following error message is displayed:

CXX0047: Error: argument list does not match a function

MORE INFORMATION

The sample code below contains a function that has a default argument. In the program, the function PrintOut() can be called either with a void parameter list or with a character pointer. When the following command is executed from CodeView's command window

   ? PrintOut("This is a string constant")

the function is called and "This is a string constant" is printed to the output screen. When the function PrintOut() is called with no parameters, for example

   ? PrintOut()

the error CXX0047 is generated. This occurs only when using the "?" command in CodeView to force a function to be evaluated.

Default arguments are supported only in C++ programs.

Sample Code

/* Compile options needed: /Od /Zi
*/ 

#include <iostream.h>

void PrintOut (char *String = "This is a default argument.");

void main (void)
{
   PrintOut();
   PrintOut( "This is not a default argument.");
}

void PrintOut (char *String)
{
   cout << String << endl;
}