2009/3/10 Frederic Belouin <frederic.belouin@xxxxxxxxx>: > Hello, > > I would like to have a warning when there is an Implicit conversion in > source code: This is a question for gcc-help. > uint32_t foo = 2000; > > uint16_t bar = foo; //--> Warning Implicit conversion from uint32_t > to uint16_t.... > > uint16_t bar2= (uint16_t) foo; // --> no warning. > > > I now that -Wtraditional-conversion in GCC 4.3.x is able to show this > message, It should not. Does it really? Can you provide a complete preprocessed testcase? > but it also display warning for function implicit conversion: > Is it possible to have only warning for implicit conversion for > variable and not for prototype? You did not understand what -Wtraditional-conversion does: http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html -Wtraditional-conversion (C and Objective-C only) Warn if a prototype causes a type conversion that is different from what would happen to the same argument in the absence of a prototype. It means that, if there was no prototype for foobar, there would be a type conversion different from what occurs given the prototype, and that is what Wtraditional-conversion warns. What you want is -Wconversion. http://gcc.gnu.org/wiki/NewWconversion Cheers, Manuel.
