12.4.11.1 Predicate references
AllApplicationManualNameSummaryHelp

  • Documentation
    • Reference manual
      • Foreign Language Interface
        • The Foreign Include File
          • Calling Prolog from C
            • Predicate references
              • PL_pred()
              • PL_predicate()
              • PL_predicate_info()
    • Packages
Availability:C-language interface function
predicate_t PL_pred(functor_t f, module_t m)
Return a handle to a predicate for the specified name/arity in the given module. If the module argument m is NULL, the current context module is used. If the target predicate does not exist a handle to a new undefined predicate is returned. The predicate may fail, returning (predicate_t)0 after setting a resource exception, if the target module has a limit on the program_space, see set_module/1. Currently aborts the process with a fatal error when out of memory. Future versions may raise a resource exception and return (predicate_t)0.