#include <stdbool.h>

typedef struct Generator Generator;
Generator *Generator_New(void *(*)(void *), void *);
void Generator_Delete(Generator *);

// Returns true if generator yielded a value, false if generator is complete
// *value is set to generator's value (yield / return value from exit)
bool Generator_Next(Generator *, void **value);

// Yield a value from the generator
// Returns true if generator should continue, false for generator to exit PDQ
bool Generator_Yield(void *);