Function clingo_sys::clingo_configuration_value_is_assigned

pub unsafe extern "C" fn clingo_configuration_value_is_assigned(
    configuration: *mut clingo_configuration_t, 
    key: clingo_id_t, 
    assigned: *mut bool
) -> bool

Check whether a entry has a value.

@pre The @link clingo_configuration_type() type@endlink of the entry must be @ref ::clingo_configuration_type_value.

Parameters:

• configuration the target configuration
• key the key
• assigned whether the entry has a value

Returns whether the call was successful