回档之后的重写。部分问题修复。添加了什么我也忘了

src/Bytecode/Instruction.hpp

@@ -0,0 +1,69 @@
+#pragma once
+
+#include <cstdint>
+#include <cassert>
+#include <vector>
+
+namespace Fig
+{
+    using u8 = uint8_t;
+    enum class OpCode : u8
+    {
+        HALT = 0, // 程序结束
+        RETURN,
+
+        LOAD_LOCAL,
+        LOAD_CONST,
+
+        STORE_LOCAL,
+
+        LT,
+        LTET,
+        GT,
+        GTET,
+        ADD,
+        SUB,
+        MUL,
+        DIV,
+
+        JUMP,          // + 64 offset (int64_t)
+        JUMP_IF_FALSE, // + 64 offset (int64_t)
+
+        CALL,
+    };
+
+    static constexpr int MAX_LOCAL_COUNT = UINT64_MAX;
+    static constexpr int MAX_CONSTANT_COUNT = UINT64_MAX;
+    static constexpr int MAX_FUNCTION_ARG_COUNT = UINT64_MAX;
+
+    inline OpCode getLastOpCode()
+    {
+        return OpCode::RETURN;
+    }
+
+    struct InstructionAddressInfo
+    {
+        size_t line, column;
+    };
+
+    using ProgramCounter = uint64_t;
+    using InstructionPoint = uint64_t;
+
+    class Instruction
+    {
+    public:
+        OpCode code;
+
+        int64_t operand;
+
+        Instruction(OpCode _code) : code(_code) {}
+
+        Instruction(OpCode _code, int64_t _operand)
+        {
+            code = _code;
+            operand = _operand;
+        }
+    };
+
+    using Instructions = std::vector<Instruction>;
+}; // namespace Fig