c('PL_query_arguments')

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - Calling Prolog from C
        
        Initiating a query from C
        
        PL_open_query()
        
        PL_next_solution()
        
        PL_cut_query()
        
        PL_close_query()
        
        PL_current_query()
        
        PL_query_engine()
        
        PL_query_arguments()
        
        PL_set_query_data()
        
        PL_query_data()
        
        PL_call_predicate()
        
        PL_call()
- Packages

Availability:C-language interface function

term_t PL_query_arguments(qid_t qid)

Return a term_t handle to the first argument of the main goal of the query qid. This allows for enumerating a query and acting on the binding of one of the arguments without additional context. Note that the returned term_t is not the same handle that was used in PL_open_query() to pass the arguments. The content of the returned vector, however, is the same.