C++ Standard Library Quick Reference

© Peter Van Weert and Marc Gregoire 2016

Peter Van Weert and Marc GregoireC++ Standard Library Quick Reference10.1007/978-1-4842-1876-1_8

8. Diagnostics

Peter Van Weert¹  and Marc Gregoire²

(1)

Kessel-Lo, Belgium

(2)

Meldert, Belgium

 

Assertions    <cassert>

Assertions are Boolean expressions that are expected to be true at a given point in the code. The assert macro of <cassert> is defined similar to this:

#ifdef NDEBUG

 #define assert(_)

#else

 #define assert(CONDITION) if (!CONDITION) { print_msg(...); std::abort(); }

#endif

If an assertion fails, a diagnostic message is written to the standard error output, and std::abort() is called, which terminates the application without performing any cleanup. While debugging an application, certain IDEs give you ...