Function clingo_sys::clingo_statistics_map_size

pub unsafe extern "C" fn clingo_statistics_map_size(
    statistics: *const clingo_statistics_t, 
    key: u64, 
    size: *mut usize
) -> bool

Get the number of subkeys of a map entry.

@pre The @link clingo_statistics_type() type@endlink of the entry must be @ref ::clingo_statistics_type_map. @param[in] statistics the target statistics @param[in] key the key @param[out] size the resulting number @return whether the call was successful