SWI-Prolog -- API-function PL_new_term

Documentation
- Reference manual
  - Foreign Language Interface
    - Interface Data Types
      - Type term_t: a reference to a Prolog term
        
        PL_new_term_ref()
        
        PL_new_term_refs()
        
        PL_copy_term_ref()
        
        PL_reset_term_refs()
        
        Interaction with the garbage collector and stack-shifter
- Packages

Availability:C-language interface function

term_t PL_new_term_refs(int n)

Return n new term references. The first term reference is returned. The others are t+1, t+2, etc. There are two reasons for using this function. PL_open_query() expects the arguments as a set of consecutive term references, and very time-critical code requiring a number of term references can be written as:

pl_mypredicate(term_t a0, term_t a1)
{ term_t t0 = PL_new_term_refs(2);
  term_t t1 = t0+1;

  ...
}