header = """
#define MUST_USE_FUNC __attribute__((warn_unused_result))
#define MUST_USE_STRUCT __attribute__((warn_unused))
#define MUST_USE_ENUM /* nothing */
"""
[fn]
must_use = "MUST_USE_FUNC"
[struct]
must_use = "MUST_USE_STRUCT"
[enum]
must_use = "MUST_USE_ENUM"