48 lines
862 B
C++
48 lines
862 B
C++
#ifndef INTCODE_INTERPRETER_HPP_
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#define INTCODE_INTERPRETER_HPP_
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#include <variant>
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#include <intcode/Machine.hpp>
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#include <Overload.hpp>
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namespace intcode {
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struct Input {
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ValueType &pos;
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};
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struct Output {
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ValueType val;
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};
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struct Halt {};
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auto StepInput(Machine & m, ValueType input) -> void;
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auto StepOutput(Machine & m) -> ValueType;
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auto Step(Machine & m) -> std::variant<Input, Output, Halt>;
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struct BadInstruction : public std::runtime_error {
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explicit BadInstruction(char const* what);
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};
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template <class Fin, class Fout>
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auto Run(Machine & machine, Fin input, Fout output) -> void {
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while (std::visit(overloaded{
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[](Halt) { return false; },
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[&](Input arg) {
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arg.pos = input();
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return true;
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},
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[&](Output arg) {
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output(arg.val);
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return true;
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}},
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Step(machine)));
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}
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} // namespace
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#endif
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