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#pragma once
#include "state.h"
typedef sm_yield (*sm_gen_fun)(sm_state* state); //NOTE: Same as sm_yield
typedef _sm_user sm_output;
void sm_free_output(sm_output* data);
template<typename T>
inline const T* sm_output_ptr(const sm_output& data)
{
if(data.set)
return _sm_get<T>(const_cast<_sm_user*>(&data));
else return nullptr;
}
template<typename T>
inline bool sm_output_value(const sm_output& data, T* output)
{
auto ptr = sm_output_ptr<T>(data);
if(ptr) {
*output = *ptr;
return true;
} else return false;
}
template<typename T>
inline T sm_output_assume_value(const sm_output& data)
{
return *sm_output_ptr<T>(data);
}
// A generator method
struct sm_generator;
/// Create a generator method with this function.
sm_generator* sm_generate(sm_gen_fun function);
/// Free a generator method
void sm_free_generator(sm_generator* generator);
/// Run this generator until the next yield.
/// Returns false if the generator ends.
/// Any output value yielded from the generator is returned in the output pointer, unless the pointer is NULL, in which case the output is discarded.
bool sm_next(sm_generator** gen, sm_state* state, sm_output* output);