inspect_structs.cpp

// structs.cpp
// Runner that prints all sizes and offsets using the generated AutoInspectors.inc

#include <cstddef>
#include <iostream>
#include <string>
#include <utility>
#include <vector>

// Minimal registry so each generated inspector self-registers
namespace ai {
    using Fn = void(*)();
    inline std::vector<std::pair<const char*, Fn>>& reg() {
        static std::vector<std::pair<const char*, Fn>> r;
        return r;
    }
    inline void add(const char* name, Fn fn) { reg().emplace_back(name, fn); }
}

// Macros consumed by AutoInspectors.inc, and auto-register
#define AI_BEGIN(Name, Size)                                               \
    static void Inspect_##Name() {                                         \
        std::cout << #Name << " (sizeof=" << (Size) << ")\n";

#define AI_FIELD(Rec, Field, TypeSpelling, ByteOffset)                     \
        std::cout << "  " #Field " @+" << (ByteOffset) << " : "            \
                  << (TypeSpelling) << "\n";

#define AI_END(Name)                                                       \
    }                                                                      \
    static const int _ai_reg_##Name = (ai::add(#Name, &Inspect_##Name), 0);

// Pull in generated records/fields
#include "AutoInspectors.inc"

int main() {
    std::cout << "=== Struct Sizes and Field Offsets ===\n";
    for (const auto& it : ai::reg()) {
        it.second();
    }
    return 0;
}