• "Jim Jennings" <jwjenn mindspring.com> Apr 05 2003
• roland <--rv ronetech.com> Apr 05 2003
• "Jim Jennings" <jwjenn mindspring.com> Apr 05 2003
• "Matthew Wilson" <dmd synesis.com.au> Apr 05 2003
• "Jim Jennings" <jwjenn mindspring.com> Apr 05 2003
• "Matthew Wilson" <dmd synesis.com.au> Apr 05 2003
• Richard Grant <fractal clark.net> Apr 10 2003

I believe there may be a problem here.

using namespace std;
class CBox
{
   public:
      CBox(double lv = 1.0, double bv = 1.0, double hv = 1.0)
                : m_Height(hv), m_Length(lv), m_Breadth(bv)
      { }
   private:
      double m_Length;
      double m_Breadth;
      double m_Height;
};
int main()
{
    CBox aBox = 2;                               //OK
    CBox bBox = aBox;                        //OK
    CBox cBox = 2 < 3 ? aBox : 3;      // ERROR
}

 C:\dm\bin\sc -Ae -C -WA -S -5 -a8 test2.cpp -I\dm\stlport\stlport
    CBox cBox = 2 < 3 ? aBox : 3; //Burp
                                ^
test2.cpp(21) : Error: illegal operand types
Had: CBox
and: int
--- errorlevel 1

Jim Jennings wrote:

 I believe there may be a problem here.
 


	.
	.

     CBox cBox = 2 < 3 ? aBox : 3;      // ERROR


	.
	.

I'm not a C syntax specialist but it seems to me some parentesis are 
missing here. I personaly would have written this that way:

CBox cBox = (2 < 3) ? aBox : 3;

"roland" <--rv ronetech.com> wrote in message
news:3E8EF4C8.3050203 ronetech.com...
 Jim Jennings wrote:

 I believe there may be a problem here.


     CBox cBox = 2 < 3 ? aBox : 3;      // ERROR


 I'm not a C syntax specialist but it seems to me some parentesis are
 missing here. I personaly would have written this that way:

 CBox cBox = (2 < 3) ? aBox : 3;


roland,
< has a higher operator precedence than ?: Here is the result with
parentheses:

C:\dm\bin\sc -Ae -C -WA -S -5 -a8 test2.cpp -I\dm\stlport\stlport
    CBox cBox = (2 < 3) ? aBox : 3;
                                  ^
test2.cpp(24) : Error: illegal operand types
Had: CBox
and: int
--- errorlevel 1

Certainly is. The 2 < 3 should be parsed correctly, and the 2nd 3 should be
implicitly converted to a CBox. CodeWarrior compiles this without issue.

"Jim Jennings" <jwjenn mindspring.com> wrote in message
news:b6mq4c$12as$1 digitaldaemon.com...
 I believe there may be a problem here.

 using namespace std;
 class CBox
 {
    public:
       CBox(double lv = 1.0, double bv = 1.0, double hv = 1.0)
                 : m_Height(hv), m_Length(lv), m_Breadth(bv)
       { }
    private:
       double m_Length;
       double m_Breadth;
       double m_Height;
 };
 int main()
 {
     CBox aBox = 2;                               //OK
     CBox bBox = aBox;                        //OK
     CBox cBox = 2 < 3 ? aBox : 3;      // ERROR
 }

  C:\dm\bin\sc -Ae -C -WA -S -5 -a8 test2.cpp -I\dm\stlport\stlport
     CBox cBox = 2 < 3 ? aBox : 3; //Burp
                                 ^
 test2.cpp(21) : Error: illegal operand types
 Had: CBox
 and: int
 --- errorlevel 1

"Matthew Wilson" <dmd synesis.com.au> wrote in message
news:b6nl2n$1m3e$1 digitaldaemon.com...
 Certainly is. The 2 < 3 should be parsed correctly, and the 2nd 3 should


 implicitly converted to a CBox. CodeWarrior compiles this without issue.


I checked it out with g++ and Borland, and they both compiled OK. I try to
do that with all of the anomalies first. I find that often it is me and not
the compiler.
BTW, I thought I had deleted the "Burp" but forgot that I had recompiled
with the comment still there.
Thanks for the confirmation.
Jim J.
 "Jim Jennings" <jwjenn mindspring.com> wrote in message
 news:b6mq4c$12as$1 digitaldaemon.com...
 I believe there may be a problem here.

 using namespace std;
 class CBox
 {
    public:
       CBox(double lv = 1.0, double bv = 1.0, double hv = 1.0)
                 : m_Height(hv), m_Length(lv), m_Breadth(bv)
       { }
    private:
       double m_Length;
       double m_Breadth;
       double m_Height;
 };
 int main()
 {
     CBox aBox = 2;                               //OK
     CBox bBox = aBox;                        //OK
     CBox cBox = 2 < 3 ? aBox : 3;      // ERROR
 }

  C:\dm\bin\sc -Ae -C -WA -S -5 -a8 test2.cpp -I\dm\stlport\stlport
     CBox cBox = 2 < 3 ? aBox : 3; //Burp
                                 ^
 test2.cpp(21) : Error: illegal operand types
 Had: CBox
 and: int
 --- errorlevel 1

Pleasure

"Jim Jennings" <jwjenn mindspring.com> wrote in message
news:b6nusl$1t62$1 digitaldaemon.com...
 "Matthew Wilson" <dmd synesis.com.au> wrote in message
 news:b6nl2n$1m3e$1 digitaldaemon.com...
 Certainly is. The 2 < 3 should be parsed correctly, and the 2nd 3 should


 implicitly converted to a CBox. CodeWarrior compiles this without issue.


 I checked it out with g++ and Borland, and they both compiled OK. I try to
 do that with all of the anomalies first. I find that often it is me and


 the compiler.
 BTW, I thought I had deleted the "Burp" but forgot that I had recompiled
 with the comment still there.
 Thanks for the confirmation.
 Jim J.
 "Jim Jennings" <jwjenn mindspring.com> wrote in message
 news:b6mq4c$12as$1 digitaldaemon.com...
 I believe there may be a problem here.

 using namespace std;
 class CBox
 {
    public:
       CBox(double lv = 1.0, double bv = 1.0, double hv = 1.0)
                 : m_Height(hv), m_Length(lv), m_Breadth(bv)
       { }
    private:
       double m_Length;
       double m_Breadth;
       double m_Height;
 };
 int main()
 {
     CBox aBox = 2;                               //OK
     CBox bBox = aBox;                        //OK
     CBox cBox = 2 < 3 ? aBox : 3;      // ERROR
 }

  C:\dm\bin\sc -Ae -C -WA -S -5 -a8 test2.cpp -I\dm\stlport\stlport
     CBox cBox = 2 < 3 ? aBox : 3; //Burp
                                 ^
 test2.cpp(21) : Error: illegal operand types
 Had: CBox
 and: int
 --- errorlevel 1

In article <b6nl2n$1m3e$1 digitaldaemon.com>, Matthew Wilson says...
Certainly is. The 2 < 3 should be parsed correctly, and the 2nd 3 should be
implicitly converted to a CBox. CodeWarrior compiles this without issue.


Other than another compiler being able to compile this, the form of the
statement violates the rules expressed in 5.16.3 for conversion of expressions
in the conditional operator.

You can fixup the code like:

CBox cBox = (2 < 3) ? aBox : CBox(3);

Richard