SWI-Prolog -- API-function PL_get_mpq

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - Exchanging GMP numbers
        
        PL_get_mpz()
        
        PL_get_mpq()
        
        PL_unify_mpz()
        
        PL_unify_mpq()
- Packages

dt class="pubdef">int PL_get_mpq(term_t t, mpq_t mpq)