PicC 9.50 dsPIC Manual.pdf

Error and Warning Messages(169) strange character after # (*) (Preprocessor)There is an unexpected character after #.(170) symbol "*" not defined in #undef (Preprocessor)The symbol supplied as argument to #undef was not already defined. This warning may be disabledwith some compilers. This warning can be avoided with code like:#ifdef SYM#undef SYM /* only undefine if defined */#endif(171) wrong number of macro arguments for "*" - * instead of * (Preprocessor)A macro has been invoked with the wrong number of arguments, e.g.:#define ADD(a, b) (a+b)ADD(1, 2, 3) /* woops -- only two arguments required */(172) formal parameter expected after # (Preprocessor)The stringization operator # (not to be confused with the leading # used for preprocessor controllines) must be followed by a formal macro parameter, e.g.:#define str(x) #y /* woops -- did you mean x instead of y? */If you need to stringize a token, you will need to define a special macro to do it, e.g.#define __mkstr__(x) #xthen use __mkstr__(token) wherever you need to convert a token into a string.(173) undefined symbol "*" in #if, 0 used (Preprocessor)A symbol on a #if expression was not a defined preprocessor macro. For the purposes of thisexpression, its value has been taken as zero. This warning may be disabled with some compilers.Example:#if FOO+BAR /* e.g. FOO was never #defined */#define GOOD#endif239