#define _INTERACTION_H__ 1
#include <stdbool.h>
+#include "libpspp/compiler.h"
#include "data/missing-values.h"
struct ccase;
unsigned int interaction_case_hash (const struct interaction *,
- const struct ccase *, unsigned int base);
+ const struct ccase *,
+ unsigned int base) WARN_UNUSED_RESULT;
bool interaction_case_equal (const struct interaction *, const struct ccase *,
const struct ccase *);
bool interaction_case_is_missing (const struct interaction *,