Function clingo_sys::clingo_symbol_is_negative [−] [src]

pub unsafe extern "C" fn clingo_symbol_is_negative(
    symbol: clingo_symbol_t, 
    negative: *mut bool
) -> bool

Check if a function is negative (has a sign).

Parameters:

  • symbol - the target symbol
  • negative - the result

Returns whether the call was successful; might set one of the following error codes:

  • ::clingo_error_runtime if symbol is not of type ::clingo_symbol_type_function