prolog_bool_to

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - Supporting JSON
      - library(http/json_convert): Convert between JSON terms and Prolog application terms
        
        current_json_object/3
        
        json_object/1
        
        prolog_bool_to_json/2
        
        prolog_to_json/2
        
        json_to_prolog/2

Availability::- use_module(library(http/json_convert)).

[semidet]prolog_bool_to_json(+Prolog, -JSON)

JSON is the JSON boolean for Prolog. It is a flexible the Prolog notation for truth-value, accepting one of true, on or 1 for @true and one of false, fail, off or 0 for @false.

Errors: instantiation_error if Prolog is unbound.