C++17 Standard Library Quick Reference: A Pocket Guide to Data Structures, Algorithms, and Functions

© Peter Van Weert and Marc Gregoire 2019

Peter Van Weert and Marc GregoireC++17 Standard Library Quick Referencehttps://doi.org/10.1007/978-1-4842-4923-9_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

#ifdef NDEBUG

 #define assert(_)

#else

 #define assert(CONDITION) \

   if (!(CONDITION)) { print_msg(__FILE__, __LINE__, ...); 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. The diagnostic message ...