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