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FwdTypes.hpp
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FwdTypes.hpp
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#ifndef FwdTypes_h
#define FwdTypes_h
#include <memory>
#include <exception>
#include <string_view>
#include <string>
#include <variant>
#include <ostream>
class Error : public std::exception {
std::string str;
public:
Error(std::string_view s) : str{ s } {}
const char *what() const noexcept override { return str.c_str(); }
};
class SType {
public:
virtual ~SType() {}
};
class ExprVisitor;
class StmtVisitor;
class LoxCallable;
class LoxClass;
class LoxInstance;
using Value = std::variant<std::monostate,bool,double,std::string,std::shared_ptr<LoxCallable>,std::shared_ptr<LoxInstance>>;
enum class ValueType { Nil, Boolean, Number, String, Callable, Instance };
std::string toString(const Value&);
bool isTruthy(const Value& l);
class Return {
Value value;
public:
Return(Value&& value) : value{ value } {}
const auto get() const { return value; }
};
#endif // FwdTypes_h