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