Consider the following code:
======================= begin code snippet ===================================
// file: test.cpp
static const char *default_string = "default";
class foo
{
public:
foo();
protected:
const char *str;
};
foo::foo() : str(default_string)
{
printf("foo::foo() : default_string = \"%s\", "
"str = \"%s\"\n",default_string,str);
if (str == NULL)
printf("str = NULL\n");
}
void test()
{
foo * pFoo = new foo();
}
======================= end code snippet ===================================
Output from root 2.22/09 under WinNT 4.0 (SP5) is:
==================== Begin Root Output =======================
C:\Root>root test.cpp
the current keyboard layout is 437
Warning in <TClass::TClass>: no dictionary for class TWinNTSystem is available
Warning in <TWinNTSystem::SetProgname>: Wrong Program path
*******************************************
* *
* W E L C O M E to R O O T *
* *
* Version 2.22/09 13 July 1999 *
* *
* You are welcome to visit our Web site *
* http://root.cern.ch *
* *
*******************************************
CINT/ROOT C/C++ Interpreter version 5.14.8, Jul 4 1999
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
Welcome to the ROOT tutorials
Type ".x demos.C" to get a toolbar from which to execute the demos
Type ".x demoshelp.C" to see the help window
root [0]
foo::foo() : default_string = "default"
str = NULL
root [1]
==================== End Root Output =======================
Somehow, the constructor for foo is improperly failing to initialize the
member variable foo::str. This breaks code that worked for many previous
releases of root/cint.
I can work around by rewriting my constructors to use assignments in the
function body rather than calling constructors for member data items, but
this will mean rewriting a lot of my class library. It also represents a
significant change in the CINT behavior, so I would respectfully suggest
that it represents a bug.
Do the warning messages at the top of the root output suggest a problem?
Regards,
Jonathan
===========================================================================
Jonathan M. Gilligan <jonathan.gilligan@vanderbilt.edu>
Research Assistant Professor of Physics (615) 343-6252
Dept. of Physics and Astronomy, Box 1807-B Fax: 343-7263
6823 Stevenson Center
Vanderbilt University, Nashville, TN 37235 Dep't Office:
322-2828
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