#define LINE __LINE__
in [Learn C or C++]
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From: Anand Hariharan on 8 Oct 2009 11:27 On Oct 8, 12:12 am, Ian Collins <ian-n...(a)hotmail.com> wrote: > ArbolOne wrote: > > Hello folks > > I have a class that permeates in all and every class, it is a > > MyException class kind of thing. The problem is that I have defined a > > LINE variable like so" > > #define LINE __LINE__ > > That's not a variable. > > Why can't you just use __LINE__, which is a reserved token which can't > be usurped in application code? > To the OP - Ian's right. My question is what the preprocessor does here. Am fairly certain that LINE is not a substitution for __LINE__ but rather the line number in the header file where that directive was encountered -- is that correct? > > Now that I am trying to recompile my program in WindowsXP and using > > the latest MS-Release of gtkmm, I get a message saying that I > > stock.h's > > extern GTKMM_API const Gtk::BuiltinStockID FILE; /*!< > > @image html gtk-file.png */ > > expects more parameters. > > > Obviously the compiler thinks that I am reffering to the LINE defined > > in stock.h and not the one defined in MyException.hpp. > > Can someone give me an idea how to resolve this problem without having > > to change my library. > > Change your library! > OP - Is your question about __LINE__ or __FILE__? If there can be such a thing as "MORE WRONG", then substituting FILE for __FILE__ is much worse than LINE for __LINE__ (which as Ian pointed out is wrong). - Anand |