Is there a purpose for using a macro that does nothing over an empty macro in c ?-CodePudding

Learning c and reading through a project, I found this.

#define EMPTY_MACRO do {} while (0)

...

#if ASSERTS_ENABLED
#define ASSERTCORE(expr) assert(expr)
#else
#define ASSERTCORE(expr) EMPTY_MACRO
#endif

What is the purpose of EMPTY_MACRO? Is it unnecessary or is there a reason for it?

CodePudding user response：

It's there so

ASSERTCORE(expr);

behaves the same with or without ASSERTS_ENABLED. A plain #define ASSERTCORE(expr) would leave behind a lone ; and that would behave differently in some cases.