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Full Discussion: ISO C++ ambiguous error
Operating Systems Linux Red Hat ISO C++ ambiguous error Post 302766233 by dany2704 on Monday 4th of February 2013 12:08:45 PM
Old 02-04-2013
ISO C++ ambiguous error
String.h has the following operator overloading function which is an user defined
Code:
//declaration
int operator==(char *ch)
//definition
int String::operator==(char *ch)
{
        if (strcmp(_text, ch) == 0)
        {
                return TRUE;
        }
        else
        {
                return FALSE;
        }
}

The above operator overloading function is called in the file Sample.c The g++ compiler throws the following error.
Code:
String.h:67: note: candidate 1: int String::operator==(char*)
Sample.c:230: note: candidate 2: operator==(const char*, const char*) <built-in>
Sample.c:249: error: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second:

i have pasted the caller code (sample.c)
Code:
230  if (String(StrInputBuffer.part_string(4)) == ":86:")
     {
       //statement
     }
249  else if (String(StrInputBuffer.part_string(1)) == ":")
     {
     }

I used the below gnu command to compile the source file
Code:
>g++ -c -g Sample.c -o sample

compiler version:
Target: x86_64-redhat-linux
gcc version 4.1.2 20080704 (Red Hat 4.1.2-54)
Could you please help me to resolve the issue?

Thanks for looking into this
Last edited by Corona688; 02-04-2013 at 01:17 PM..
 

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LEARN ABOUT DEBIAN

ost_time

ost::Time(3)						     Library Functions Manual						      ost::Time(3)

NAME

       ost::Time -

       The Time class uses a integer representation of the current time.

SYNOPSIS

       #include <numbers.h>

       Inherited by ost::Datetime.

   Public Member Functions
       Time (time_t tm)
       Time (tm *dt)
       Time (char *str, size_t size=0)
       Time (int hour, int minute, int second)
       Time ()
       virtual ~Time ()
       long getValue (void) const
       int getHour (void) const
       int getMinute (void) const
       int getSecond (void) const
       char * getTime (char *buffer) const
       time_t getTime (void) const
       tm * getTime (tm *buf) const
       void setTime (char *str, size_t size=0)
       bool isValid (void) const
       operator long ()
       String operator() () const
       Time & operator++ ()
       Time & operator-- ()
       Time & operator+= (const int val)
       Time & operator-= (const int val)
       int operator== (const Time &time)
       int operator!= (const Time &time)
       int operator< (const Time &time)
       int operator<= (const Time &time)
       int operator> (const Time &time)
       int operator>= (const Time &time)
       bool operator! () const

   Protected Member Functions
       void toSeconds (int hour, int minute, int second)
       void fromSeconds (char *buf) const
       virtual void update (void)

   Protected Attributes
       long seconds

   Friends
       Time operator+ (const Time &time1, const Time &time2)
       Time operator- (const Time &time1, const Time &time2)
       Time operator+ (const Time &time, const int val)
       Time operator- (const Time &time, const int val)
       Time operator+ (const int val, const Time &time)
       Time operator- (const int val, const Time &time)

Detailed Description
       The Time class uses a integer representation of the current time.

       This is then manipulated in several forms and may be exported as needed.

       Author:
	   Marcelo Dalmas mad@brasmap.com.br Integer based time class.

Constructor &; Destructor Documentation
   ost::Time::Time (time_ttm)
   ost::Time::Time (tm *dt)
   ost::Time::Time (char *str, size_tsize = 0)
   ost::Time::Time (inthour, intminute, intsecond)
   ost::Time::Time ()
   virtual ost::Time::~Time () [virtual]
Member Function Documentation
   void ost::Time::fromSeconds (char *buf) const [protected]
   int ost::Time::getHour (void) const
   int ost::Time::getMinute (void) const
   int ost::Time::getSecond (void) const
   char* ost::Time::getTime (char *buffer) const
   time_t ost::Time::getTime (void) const
   tm* ost::Time::getTime (tm *buf) const
   long ost::Time::getValue (void) const
   bool ost::Time::isValid (void) const
       Reimplemented in ost::Datetime.

   ost::Time::operator long () [inline]
   bool ost::Time::operator! (void) const [inline]
       Reimplemented in ost::Datetime.

   int ost::Time::operator!= (const Time &time)
   String ost::Time::operator() () const
   Time& ost::Time::operator++ ()
   Time& ost::Time::operator+= (const intval)
   Time& ost::Time::operator-- ()
   Time& ost::Time::operator-= (const intval)
   int ost::Time::operator< (const Time &time)
   int ost::Time::operator<= (const Time &time)
   int ost::Time::operator== (const Time &time)
   int ost::Time::operator> (const Time &time)
   int ost::Time::operator>= (const Time &time)
   void ost::Time::setTime (char *str, size_tsize = 0)
   void ost::Time::toSeconds (inthour, intminute, intsecond) [protected]
   virtual void ost::Time::update (void) [protected],  [virtual]
Friends And Related Function Documentation
   Time operator+ (const Time &time1, const Time &time2) [friend]
   Time operator+ (const Time &time, const intval) [friend]
   Time operator+ (const intval, const Time &time) [friend]
   Time operator- (const Time &time1, const Time &time2) [friend]
   Time operator- (const Time &time, const intval) [friend]
   Time operator- (const intval, const Time &time) [friend]
Member Data Documentation
   long ost::Time::seconds [protected]
Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012						      ost::Time(3)
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