SWI-Prolog -- API-function PL_clear

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - Prolog exceptions in foreign code
        
        PL_raise_exception()
        
        PL_throw()
        
        PL_exception()
        
        PL_clear_exception()
- Packages

Availability:C-language interface function

void PL_clear_exception(void)

Tells Prolog that the encountered exception must be ignored. This function must be called if control remains in C after a previous API call fails with an exception.^{232This
feature is non-portable. Other Prolog systems (e.g., YAP) have no
facilities to ignore raised exceptions, and the design of YAP's
exception handling does not support such a facility.} If there is no pending exception, PL_clear_exception() does nothing.