用G++编译C++代码报错：In instantiation of 'struct std::iterator_traits<xxx>'

最新推荐文章于 2024-08-09 21:06:40 发布
最新推荐文章于 2024-08-09 21:06:40 发布
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分类专栏： C/C++ 文章标签： g++ c++ 报错
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本文链接：https://blog.youkuaiyun.com/fxfeixue/article/details/89176891
本文详细解析了使用std::copy函数时遇到的编译错误，错误源于参数类型不被识别为类、结构体或联合类型。文章通过具体代码示例，指导如何正确使用std函数，避免此类编译错误。

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… In instantiation of ‘struct std::iterator_traits<xxx>’:
required from '_OI std::__copy_move_a(_II, _II, _OI) …
required from '_OI std::__copy_move_a2(_II, _II, _OI) …
required from '_OI std::copy(_II, _II, _OI) …
error: ‘xxx’ is not a class, struct, or union type
      typedef typename _Iterator::iterator_category iterator_category;
error: ‘xxx’ is not a class, struct, or union type
      typedef typename _Iterator::value_type value_type;
error: ‘xxx’ is not a class, struct, or union type
      typedef typename _Iterator::difference_type difference_type;
error: ‘xxx’ is not a class, struct, or union type
      typedef typename _Iterator::pointer pointer;
error: ‘xxx’ is not a class, struct, or union type
      typedef typename _Iterator::reference reference;

检查编译单元内的std相关代码的用法，尤其是std函数的参数是否正确。

例如：
char source[] = {1, 2, 3, 4, 5};
std::vector dest;
std::copy(source[0], source[5], std::back_inserter(dest));
std::copy前两个参数就会导致编译出这种错误。

C++： 容器：set
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迭代器 set的反向迭代器也有++，–操作。 但是没有加减法的运算。 /include/bits/stl_set.h 里面是一个红黑树类型的 iterator； stl_tree.h typedef typename _Rep_type::const_iterator iterator; typedef _Rb_tree<key_type, value_type, _Identity<value_type>, key_compare, _Key_al
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头一次碰到g++出现了一个很奇怪的警告，输出信息大概是 : In instantiation of …required from here …warning 改来改去改不掉，最终发现是因为构造函数初始化列表没有按照类内声明变量的顺序来写，比如 class A { public: A(int a, char b) :m_b(b), m_a(a) { } // warning private: int m_a; char m_b; } // 改成下面这样就没..
error:no type named iterator_category in struct
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根据移动特性和施行操作，迭代器分为5类： Input iterator：只读 Output iterator：只写 Forward iterator：在此迭代器所形成的区间上进行读写操作 Bidirectional iterator：forward iterator+双向移动 Random Access iterator：随机存储迭代器 前四种迭代器+随机存储（p+n,p-n,p1-p2,p[n
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先上错误： ../include/rectangle.h:Ininstantiationof'R_START_TREE::Rectangle<dimensions>&R_START_TREE::Rectangle<dimensions>::operator=(constR_START_TREE::Rectangle<dimensions>&)[withlonglongunsignedintdimensions=3]': r...
#include "../include/include/realtime_utils/realtime_utils.hpp" #include <rclcpp/rclcpp.hpp> #include <std_msgs/msg/float64.hpp> #include <chrono> #include <thread> #include <vector> #include <string> #include <memory> #include <atomic> #include <limits> using namespace std::chrono_literals; // 原子操作辅助工具 namespace atomic_utils { template<typename T> void atomic_update_max(std::atomic<T>& atomic_var, T value) { T current = atomic_var.load(); while (value > current && !atomic_var.compare_exchange_weak(current, value)) {} } template<typename T> void atomic_update_min(std::atomic<T>& atomic_var, T value) { T current = atomic_var.load(); while (value < current && !atomic_var.compare_exchange_weak(current, value)) {} } } // 多线程订阅者节点 class MultiThreadSubscriber : public rclcpp::Node { public: // 线程统计结构（全原子操作） struct ThreadStats { std::atomic<uint64_t> message_count{0}; std::atomic<uint64_t> total_latency{0}; // 改为uint64避免溢出 std::atomic<int64_t> max_latency{0}; std::atomic<int64_t> min_latency{std::numeric_limits<int64_t>::max()}; // 原子重置方法 void reset() { message_count = 0; total_latency = 0; max_latency = 0; min_latency = std::numeric_limits<int64_t>::max(); } }; // 消息数据结构 struct MessageData { double value; std::chrono::steady_clock::time_point receive_time; int thread_id; }; // 构造函数 MultiThreadSubscriber() : Node("multithread_subscriber") { // 参数声明 declare_parameter("thread_count", 4); declare_parameter("process_time_us", 200); // 获取参数 int thread_count = get_parameter("thread_count").as_int(); int process_time = get_parameter("process_time_us").as_int(); thread_stats_.resize(thread_count); // 创建订阅线程 for (int i = 0; i < thread_count; ++i) { threads_.emplace_back(&MultiThreadSubscriber::subscriber_loop, this, i, process_time); } // 创建低优先级监控线程 monitor_thread_ = std::thread([this]() { pthread_setname_np(pthread_self(), "monitor_thread"); realtime_utils::RTThread::set_current_thread_priority(SCHED_OTHER, 0); monitor_loop(); }); } // 析构函数 ~MultiThreadSubscriber() { running_ = false; for (auto& thread : threads_) { if (thread.joinable()) thread.join(); } if (monitor_thread_.joinable()) monitor_thread_.join(); } private: // 订阅线程主循环 void subscriber_loop(int thread_id, int process_time) { // 设置高实时优先级 std::string thread_name = "sub_thread_" + std::to_string(thread_id); pthread_setname_np(pthread_self(), thread_name.c_str()); if (!realtime_utils::RTThread::set_current_thread_priority( SCHED_FIFO, 90 - thread_id)) { // 提高优先级 RCLCPP_ERROR(get_logger(), "Thread %d failed to set real-time priority", thread_id); } // 创建专属话题 auto topic_name = "control_topic_" + std::to_string(thread_id); auto qos = rclcpp::QoS(100).reliable().durability_volatile(); // 增加队列大小 // 创建订阅器 auto sub = create_subscription<std_msgs::msg::Float64>( topic_name, qos, [this, thread_id](const std_msgs::msg::Float64::SharedPtr msg) { MessageData data; data.value = msg->data; data.receive_time = std::chrono::steady_clock::now(); data.thread_id = thread_id; if (!message_buffer_.push(data)) { RCLCPP_WARN_THROTTLE(get_logger(), *get_clock(), 1000, "Thread %d buffer full, message dropped", thread_id); } }); // 主处理循环 while (rclcpp::ok() && running_) { MessageData data; if (message_buffer_.pop(data)) { // 模拟处理耗时 std::this_thread::sleep_for(std::chrono::microseconds(process_time)); // 计算端到端延迟 auto latency = std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::steady_clock::now() - data.receive_time).count(); // 无锁更新统计 update_thread_stats(data.thread_id, latency); } else { std::this_thread::sleep_for(100us); // 更短的休眠 } } } // 无锁统计更新 void update_thread_stats(size_t thread_id, int64_t latency) { if (thread_id >= thread_stats_.size()) return; auto& stats = thread_stats_[thread_id]; stats.message_count++; stats.total_latency += latency; atomic_utils::atomic_update_max(stats.max_latency, latency); atomic_utils::atomic_update_min(stats.min_latency, latency); } // 监控循环（无锁） void monitor_loop() { auto last_print = std::chrono::steady_clock::now(); while (rclcpp::ok() && running_) { std::this_thread::sleep_for(5s); // 降低输出频率 // 原子获取统计快照 std::vector<ThreadStats> snapshot; for (auto& stats : thread_stats_) { ThreadStats s; s.message_count = stats.message_count.exchange(0); s.total_latency = stats.total_latency.exchange(0); s.max_latency = stats.max_latency.exchange(0); s.min_latency = stats.min_latency.exchange(std::numeric_limits<int64_t>::max()); snapshot.push_back(s); } // 输出统计（非实时上下文） print_stats(snapshot); } } // 打印统计（无锁） void print_stats(const std::vector<ThreadStats>& snapshot) { RCLCPP_INFO(get_logger(), "\n=== Subscriber Threads Stats ==="); for (size_t i = 0; i < snapshot.size(); ++i) { const auto& stats = snapshot[i]; if (stats.message_count == 0) continue; double avg_latency = static_cast<double>(stats.total_latency) / stats.message_count; RCLCPP_INFO(get_logger(), "Thread %zu: %lu msgs | Avg: %.2f us | Max: %ld us | Min: %ld us", i, stats.message_count.load(), avg_latency, stats.max_latency.load(), stats.min_latency.load()); } } // 成员变量 std::vector<std::thread> threads_; std::thread monitor_thread_; std::atomic<bool> running_{true}; realtime_utils::LockFreeRingBuffer<MessageData, 20000> message_buffer_; // 增大缓冲区 std::vector<ThreadStats> thread_stats_; // 无锁统计 }; int main(int argc, char** argv) { rclcpp::init(argc, argv); auto node = std::make_shared<MultiThreadSubscriber>(); rclcpp::spin(node); rclcpp::shutdown(); return 0; } #include "../include/include/realtime_utils/realtime_utils.hpp" #include <rclcpp/rclcpp.hpp> #include <std_msgs/msg/float64.hpp> #include <chrono> #include <thread> #include <vector> #include <string> #include <memory> #include <atomic> #include <limits> using namespace std::chrono_literals; // 原子操作辅助工具 namespace atomic_utils { template<typename T> void atomic_update_max(std::atomic<T>& atomic_var, T value) { T current = atomic_var.load(); while (value > current && !atomic_var.compare_exchange_weak(current, value)) {} } template<typename T> void atomic_update_min(std::atomic<T>& atomic_var, T value) { T current = atomic_var.load(); while (value < current && !atomic_var.compare_exchange_weak(current, value)) {} } } // 多线程发布者节点 class MultiThreadPublisher : public rclcpp::Node { public: // 线程统计结构（全原子操作） struct ThreadStats { std::atomic<uint64_t> message_count{0}; std::atomic<uint64_t> total_latency{0}; // 改为uint64避免溢出 std::atomic<int64_t> max_latency{0}; std::atomic<int64_t> min_latency{std::numeric_limits<int64_t>::max()}; // 原子重置方法 void reset() { message_count = 0; total_latency = 0; max_latency = 0; min_latency = std::numeric_limits<int64_t>::max(); } }; // 构造函数 MultiThreadPublisher() : Node("multithread_publisher") { // 参数声明 declare_parameter("thread_count", 4); declare_parameter("frequency", 500.0); // 获取参数 int thread_count = get_parameter("thread_count").as_int(); double frequency = get_parameter("frequency").as_double(); thread_stats_.resize(thread_count); // 初始化统计容器 // 创建发布线程 for (int i = 0; i < thread_count; ++i) { threads_.emplace_back(&MultiThreadPublisher::publisher_loop, this, i, frequency); } // 创建低优先级监控线程 monitor_thread_ = std::thread([this]() { pthread_setname_np(pthread_self(), "monitor_thread"); realtime_utils::RTThread::set_current_thread_priority(SCHED_OTHER, 0); monitor_loop(); }); } // 析构函数 ~MultiThreadPublisher() { running_ = false; for (auto& thread : threads_) { if (thread.joinable()) thread.join(); } if (monitor_thread_.joinable()) monitor_thread_.join(); } private: // 发布线程主循环 void publisher_loop(int thread_id, double frequency) { // 设置线程名和实时优先级 std::string thread_name = "pub_thread_" + std::to_string(thread_id); pthread_setname_np(pthread_self(), thread_name.c_str()); if (!realtime_utils::RTThread::set_current_thread_priority( SCHED_FIFO, 90 - thread_id)) { // 提高优先级 RCLCPP_ERROR(get_logger(), "Thread %d failed to set real-time priority", thread_id); } // 创建专属话题和发布器 auto topic_name = "control_topic_" + std::to_string(thread_id); auto qos = rclcpp::QoS(100).reliable().durability_volatile(); // 增加队列大小 auto pub = create_publisher<std_msgs::msg::Float64>(topic_name, qos); // 计算发布周期 const auto period = std::chrono::nanoseconds(static_cast<int64_t>(1e9 / frequency)); auto start_time = std::chrono::steady_clock::now(); uint64_t count = 0; // 复用消息对象 auto msg = std::make_shared<std_msgs::msg::Float64>(); msg->data = thread_id; while (rclcpp::ok() && running_) { auto next_time = start_time + count * period; std::this_thread::sleep_until(next_time); msg->data = count; pub->publish(*msg); auto latency = std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::steady_clock::now() - next_time).count(); // 无锁更新统计 update_thread_stats(thread_id, latency); count++; } } // 无锁统计更新 void update_thread_stats(size_t thread_id, int64_t latency) { if (thread_id >= thread_stats_.size()) return; auto& stats = thread_stats_[thread_id]; stats.message_count++; stats.total_latency += latency; atomic_utils::atomic_update_max(stats.max_latency, latency); atomic_utils::atomic_update_min(stats.min_latency, latency); } // 监控循环（无锁） void monitor_loop() { auto last_print = std::chrono::steady_clock::now(); while (rclcpp::ok() && running_) { std::this_thread::sleep_for(5s); // 降低输出频率 // 原子获取统计快照 std::vector<ThreadStats> snapshot; for (auto& stats : thread_stats_) { ThreadStats s; s.message_count = stats.message_count.exchange(0); s.total_latency = stats.total_latency.exchange(0); s.max_latency = stats.max_latency.exchange(0); s.min_latency = stats.min_latency.exchange(std::numeric_limits<int64_t>::max()); snapshot.push_back(s); } // 输出统计（非实时上下文） print_stats(snapshot); } } // 打印统计（无锁） void print_stats(const std::vector<ThreadStats>& snapshot) { RCLCPP_INFO(get_logger(), "\n=== Publisher Threads Stats ==="); for (size_t i = 0; i < snapshot.size(); ++i) { const auto& stats = snapshot[i]; if (stats.message_count == 0) continue; double avg_latency = static_cast<double>(stats.total_latency) / stats.message_count; RCLCPP_INFO(get_logger(), "Thread %zu: %lu msgs | Avg: %.2f us | Max: %ld us | Min: %ld us", i, stats.message_count.load(), avg_latency, stats.max_latency.load(), stats.min_latency.load()); } } // 成员变量 std::vector<std::thread> threads_; std::thread monitor_thread_; std::atomic<bool> running_{true}; std::vector<ThreadStats> thread_stats_; // 无锁统计 }; int main(int argc, char** argv) { rclcpp::init(argc, argv); if (getuid() != 0) { RCLCPP_ERROR(rclcpp::get_logger("main"), "This program requires root privileges for real-time scheduling"); return 1; } auto node = std::make_shared<MultiThreadPublisher>(); rclcpp::spin(node); rclcpp::shutdown(); return 0; } 报错： --- stderr: realtime_demo /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp: In member function ‘void MultiThreadSubscriber::monitor_loop()’: /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:154:14: warning: variable ‘last_print’ set but not used [-Wunused-but-set-variable] 154 | auto last_print = std::chrono::steady_clock::now(); | ^~~~~~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp: In member function ‘void MultiThreadPublisher::monitor_loop()’: /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:140:14: warning: variable ‘last_print’ set but not used [-Wunused-but-set-variable] 140 | auto last_print = std::chrono::steady_clock::now(); | ^~~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/c++allocator.h:33, from /usr/include/c++/11/bits/allocator.h:46, from /usr/include/c++/11/memory:64, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:153, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:1: /usr/include/c++/11/ext/new_allocator.h: In instantiation of ‘void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = MultiThreadSubscriber::ThreadStats; _Args = {const MultiThreadSubscriber::ThreadStats&}; _Tp = MultiThreadSubscriber::ThreadStats]’: /usr/include/c++/11/bits/alloc_traits.h:516:17: required from ‘static void std::allocator_traits<std::allocator<_Tp1> >::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = MultiThreadSubscriber::ThreadStats; _Args = {const MultiThreadSubscriber::ThreadStats&}; _Tp = MultiThreadSubscriber::ThreadStats; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<MultiThreadSubscriber::ThreadStats>]’ /usr/include/c++/11/bits/stl_vector.h:1192:30: required from ‘void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = MultiThreadSubscriber::ThreadStats; _Alloc = std::allocator<MultiThreadSubscriber::ThreadStats>; std::vector<_Tp, _Alloc>::value_type = MultiThreadSubscriber::ThreadStats]’ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:167:35: required from here /usr/include/c++/11/ext/new_allocator.h:162:11: error: use of deleted function ‘MultiThreadSubscriber::ThreadStats::ThreadStats(const MultiThreadSubscriber::ThreadStats&)’ 162 | { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); } | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:35:12: note: ‘MultiThreadSubscriber::ThreadStats::ThreadStats(const MultiThreadSubscriber::ThreadStats&)’ is implicitly deleted because the default definition would be ill-formed: 35 | struct ThreadStats { | ^~~~~~~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:35:12: error: use of deleted function ‘std::atomic<long unsigned int>::atomic(const std::atomic<long unsigned int>&)’ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:1: /usr/include/c++/11/atomic:898:7: note: declared here 898 | atomic(const atomic&) = delete; | ^~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:35:12: error: use of deleted function ‘std::atomic<long unsigned int>::atomic(const std::atomic<long unsigned int>&)’ 35 | struct ThreadStats { | ^~~~~~~~~~~ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:1: /usr/include/c++/11/atomic:898:7: note: declared here 898 | atomic(const atomic&) = delete; | ^~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:35:12: error: use of deleted function ‘std::atomic<long int>::atomic(const std::atomic<long int>&)’ 35 | struct ThreadStats { | ^~~~~~~~~~~ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:1: /usr/include/c++/11/atomic:875:7: note: declared here 875 | atomic(const atomic&) = delete; | ^~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:35:12: error: use of deleted function ‘std::atomic<long int>::atomic(const std::atomic<long int>&)’ 35 | struct ThreadStats { | ^~~~~~~~~~~ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:1: /usr/include/c++/11/atomic:875:7: note: declared here 875 | atomic(const atomic&) = delete; | ^~~~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/c++allocator.h:33, from /usr/include/c++/11/bits/allocator.h:46, from /usr/include/c++/11/memory:64, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:153, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:1: /usr/include/c++/11/ext/new_allocator.h: In instantiation of ‘void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = MultiThreadPublisher::ThreadStats; _Args = {const MultiThreadPublisher::ThreadStats&}; _Tp = MultiThreadPublisher::ThreadStats]’: /usr/include/c++/11/bits/alloc_traits.h:516:17: required from ‘static void std::allocator_traits<std::allocator<_Tp1> >::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = MultiThreadPublisher::ThreadStats; _Args = {const MultiThreadPublisher::ThreadStats&}; _Tp = MultiThreadPublisher::ThreadStats; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<MultiThreadPublisher::ThreadStats>]’ /usr/include/c++/11/bits/stl_vector.h:1192:30: required from ‘void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = MultiThreadPublisher::ThreadStats; _Alloc = std::allocator<MultiThreadPublisher::ThreadStats>; std::vector<_Tp, _Alloc>::value_type = MultiThreadPublisher::ThreadStats]’ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:153:35: required from here /usr/include/c++/11/ext/new_allocator.h:162:11: error: use of deleted function ‘MultiThreadPublisher::ThreadStats::ThreadStats(const MultiThreadPublisher::ThreadStats&)’ 162 | { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); } | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:35:12: note: ‘MultiThreadPublisher::ThreadStats::ThreadStats(const MultiThreadPublisher::ThreadStats&)’ is implicitly deleted because the default definition would be ill-formed: 35 | struct ThreadStats { | ^~~~~~~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:35:12: error: use of deleted function ‘std::atomic<long unsigned int>::atomic(const std::atomic<long unsigned int>&)’ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:1: /usr/include/c++/11/atomic:898:7: note: declared here 898 | atomic(const atomic&) = delete; | ^~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:35:12: error: use of deleted function ‘std::atomic<long unsigned int>::atomic(const std::atomic<long unsigned int>&)’ 35 | struct ThreadStats { | ^~~~~~~~~~~ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:1: /usr/include/c++/11/atomic:898:7: note: declared here 898 | atomic(const atomic&) = delete; | ^~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:35:12: error: use of deleted function ‘std::atomic<long int>::atomic(const std::atomic<long int>&)’ 35 | struct ThreadStats { | ^~~~~~~~~~~ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:1: /usr/include/c++/11/atomic:875:7: note: declared here 875 | atomic(const atomic&) = delete; | ^~~~~~ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:35:12: error: use of deleted function ‘std::atomic<long int>::atomic(const std::atomic<long int>&)’ 35 | struct ThreadStats { | ^~~~~~~~~~~ In file included from /usr/include/c++/11/future:41, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/executors.hpp:18, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:155, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:1: /usr/include/c++/11/atomic:875:7: note: declared here 875 | atomic(const atomic&) = delete; | ^~~~~~ In file included from /usr/include/c++/11/memory:66, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:153, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:1: /usr/include/c++/11/bits/stl_uninitialized.h: In instantiation of ‘_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = std::move_iterator<MultiThreadPublisher::ThreadStats*>; _ForwardIterator = MultiThreadPublisher::ThreadStats*]’: /usr/include/c++/11/bits/stl_uninitialized.h:333:37: required from ‘_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = std::move_iterator<MultiThreadPublisher::ThreadStats*>; _ForwardIterator = MultiThreadPublisher::ThreadStats*; _Tp = MultiThreadPublisher::ThreadStats]’ /usr/include/c++/11/bits/stl_uninitialized.h:355:2: required from ‘_ForwardIterator std::__uninitialized_move_if_noexcept_a(_InputIterator, _InputIterator, _ForwardIterator, _Allocator&) [with _InputIterator = MultiThreadPublisher::ThreadStats*; _ForwardIterator = MultiThreadPublisher::ThreadStats*; _Allocator = std::allocator<MultiThreadPublisher::ThreadStats>]’ /usr/include/c++/11/bits/vector.tcc:659:48: required from ‘void std::vector<_Tp, _Alloc>::_M_default_append(std::vector<_Tp, _Alloc>::size_type) [with _Tp = MultiThreadPublisher::ThreadStats; _Alloc = std::allocator<MultiThreadPublisher::ThreadStats>; std::vector<_Tp, _Alloc>::size_type = long unsigned int]’ /usr/include/c++/11/bits/stl_vector.h:940:4: required from ‘void std::vector<_Tp, _Alloc>::resize(std::vector<_Tp, _Alloc>::size_type) [with _Tp = MultiThreadPublisher::ThreadStats; _Alloc = std::allocator<MultiThreadPublisher::ThreadStats>; std::vector<_Tp, _Alloc>::size_type = long unsigned int]’ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_publisher.cpp:60:29: required from here /usr/include/c++/11/bits/stl_uninitialized.h:138:72: error: static assertion failed: result type must be constructible from value type of input range 138 | static_assert(is_constructible<_ValueType2, decltype(*__first)>::value, | ^~~~~ /usr/include/c++/11/bits/stl_uninitialized.h:138:72: note: ‘std::integral_constant<bool, false>::value’ evaluates to false In file included from /usr/include/c++/11/memory:66, from /home/yidds/YiDDS/YiDDS_humble/install/rclcpp/include/rclcpp/rclcpp/rclcpp.hpp:153, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/../include/include/realtime_utils/realtime_utils.hpp:3, from /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:1: /usr/include/c++/11/bits/stl_uninitialized.h: In instantiation of ‘_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = std::move_iterator<MultiThreadSubscriber::ThreadStats*>; _ForwardIterator = MultiThreadSubscriber::ThreadStats*]’: /usr/include/c++/11/bits/stl_uninitialized.h:333:37: required from ‘_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = std::move_iterator<MultiThreadSubscriber::ThreadStats*>; _ForwardIterator = MultiThreadSubscriber::ThreadStats*; _Tp = MultiThreadSubscriber::ThreadStats]’ /usr/include/c++/11/bits/stl_uninitialized.h:355:2: required from ‘_ForwardIterator std::__uninitialized_move_if_noexcept_a(_InputIterator, _InputIterator, _ForwardIterator, _Allocator&) [with _InputIterator = MultiThreadSubscriber::ThreadStats*; _ForwardIterator = MultiThreadSubscriber::ThreadStats*; _Allocator = std::allocator<MultiThreadSubscriber::ThreadStats>]’ /usr/include/c++/11/bits/vector.tcc:659:48: required from ‘void std::vector<_Tp, _Alloc>::_M_default_append(std::vector<_Tp, _Alloc>::size_type) [with _Tp = MultiThreadSubscriber::ThreadStats; _Alloc = std::allocator<MultiThreadSubscriber::ThreadStats>; std::vector<_Tp, _Alloc>::size_type = long unsigned int]’ /usr/include/c++/11/bits/stl_vector.h:940:4: required from ‘void std::vector<_Tp, _Alloc>::resize(std::vector<_Tp, _Alloc>::size_type) [with _Tp = MultiThreadSubscriber::ThreadStats; _Alloc = std::allocator<MultiThreadSubscriber::ThreadStats>; std::vector<_Tp, _Alloc>::size_type = long unsigned int]’ /home/yidds/YiDDS/multithreading_YIDDS/src/realtime_demo/src/multithread_subscriber.cpp:67:29: required from here /usr/include/c++/11/bits/stl_uninitialized.h:138:72: error: static assertion failed: result type must be constructible from value type of input range 138 | static_assert(is_constructible<_ValueType2, decltype(*__first)>::value, | ^~~~~ /usr/include/c++/11/bits/stl_uninitialized.h:138:72: note: ‘std::integral_constant<bool, false>::value’ evaluates to false 修改完给我完整的代码，要求功能基本不变，
最新发布
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完整修改后的代码（以`MultiThreadSubscriber`为例，`MultiThreadPublisher`同理）：</think>我分析了你的代码和错误信息，问题主要出在`ThreadStats`结构体上。原子类型(`std::atomic`)不可复制，但你在`snapshot....
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解决：Member reference base type ‘XXX‘ is not a structure or union
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/usr/include/c++/5/ext/new_allocator.h: In instantiation of ‘void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& …) [with _Up = std::vectorjgproto::UpdateAstStatusRequest_AST; _Args = {jgproto::UpdateAstStatusRequest_AST*}; _Tp = std::vectorjgproto::UpdateAstStatusRequest_AST]’: /usr/include/c++/5/bits/alloc_traits.h:530:4: required from ‘static void std::allocator_traits<std::allocator<_CharT> >::construct(std::allocator_traits<std::allocator<_CharT> >::allocator_type&, _Up*, _Args&& …) [with _Up = std::vectorjgproto::UpdateAstStatusRequest_AST; _Args = {jgproto::UpdateAstStatusRequest_AST*}; _Tp = std::vectorjgproto::UpdateAstStatusRequest_AST; std::allocator_traits<std::allocator<_CharT> >::allocator_type = std::allocator<std::vectorjgproto::UpdateAstStatusRequest_AST >]’ /usr/include/c++/5/bits/shared_ptr_base.h:522:39: required from ‘std::_Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp>::_Sp_counted_ptr_inplace(_Alloc, _Args&& …) [with _Args = {jgproto::UpdateAstStatusRequest_AST*}; _Tp = std::vectorjgproto::UpdateAstStatusRequest_AST; _Alloc = std::allocator<std::vectorjgproto::UpdateAstStatusRequest_AST >; __gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2u]’
03-27
<think>嗯，用户现在遇到了一个C++编译错误，看起来是关于模板实例化的错误，特别是和allocator相关的。我需要先仔细看一下用户提供的错误信息。 首先，错误信息提到了`new_allocator.h`中的`construct`函数，在实例化时出现问题。用户提供的错误信息中有几个模板参数，比如`_Up = std::vectorjgproto::UpdateAstStatusRequest_AST`，这里可能是一个拼写错误，应该是`std::vector<jgproto::UpdateAstStatusRequest_AST>`，缺少了尖括号。因为C++中的vector模板需要类型参数用尖括号括起来，所以可能用户或者代码中在类型名称书写时有误，导致编译器无法正确识别，从而引发模板实例化错误。 接下来，错误信息中还提到了`alloc_traits.h`和`shared_ptr_base.h`中的相关代码，这些都是标准库中用于内存分配和智能指针的部分。看起来问题可能出在使用`std::allocator`时，试图构造一个对象，但传入的参数类型不匹配，或者构造函数不存在。 我需要考虑用户可能的代码问题。例如，用户可能在创建`std::vector`的元素时，错误地传递了一个指针，而不是实际的对象。比如，可能在`emplace_back`或`push_back`中传入了指针，而vector期望的是对象实例，或者可能在使用智能指针时，构造参数不正确。 另外，用户可能没有正确包含必要的头文件，或者`jgproto`命名空间中的`UpdateAstStatusRequest_AST`类没有正确的构造函数，导致无法从指针构造对象。或者，可能是在模板参数中错误地省略了尖括号，导致类型名称被错误解析，比如`std::vectorjgproto...`应该为`std::vector<jgproto...>`。 再考虑到用户之前的问题是关于网络抓包的，现在突然切换到C++编译错误，可能用户正在开发一个涉及网络和协议处理的项目，可能使用了protobuf生成的代码（比如`jgproto`可能是一个protobuf生成的命名空间），在处理消息时构造数据结构（如vector）时出现了问题。 我需要逐步分析错误信息，帮助用户定位问题。首先，检查类型名称是否正确，特别是模板参数中的vector是否正确使用了尖括号。然后，检查是否在构造对象时传递了正确的参数类型，比如是否误用了指针而不是对象实例。此外，查看`UpdateAstStatusRequest_AST`类的构造函数是否可用，是否有适当的访问权限，或者是否需要显式初始化某些成员。 可能的解决方案包括修正类型名称中的语法错误，检查构造函数的参数列表，确保传入的参数类型匹配，以及验证所有必要的头文件是否被正确包含。此外，如果用户使用了类似`emplace_back`的方法，可能需要传递构造参数而不是指针，或者使用`push_back`并解引用指针。 需要以清晰的结构向用户解释错误原因，并给出具体的修改建议，同时可能需要指导用户如何检查相关代码部分，确保模板实例化的正确性。</think>以下是针对你提供的C++编译错误的分层解析和解决方案： --- ### **1. 错误类型定位** 这是一个 **模板实例化错误**，核心问题在于标准库的 `std::allocator` 尝试构造对象时参数类型不匹配。错误链如下： ``` new_allocator.h → alloc_traits.h → shared_ptr_base.h ``` 表明问题发生在智能指针（`shared_ptr`）的内存分配过程中。 --- ### **2. 关键错误点分析** #### **(1) 错误行核心信息** ```cpp void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) ``` - **`_Up` 的类型**：`std::vectorjgproto::UpdateAstStatusRequest_AST` - **问题**：`std::vector` 缺少模板参数括号 `<...>`，正确写法应为 `std::vector<jgproto::UpdateAstStatusRequest_AST>`。 - **`_Args` 的类型**：`{jgproto::UpdateAstStatusRequest_AST*}` - **问题**：尝试用指针类型 `UpdateAstStatusRequest_AST*` 构造对象，但目标类型需要对象实例。 --- ### **3. 根因推测** #### **(1) 类型名称语法错误** 代码中可能错误地将 `std::vector<jgproto::UpdateAstStatusRequest_AST>` 写成了 `std::vectorjgproto::UpdateAstStatusRequest_AST`，缺少尖括号 `<` `>`，导致编译器无法识别模板类型。 #### **(2) 构造函数参数不匹配** 可能尝试通过指针构造对象，例如： ```cpp // 错误示例：传递指针而非对象 std::vector<jgproto::UpdateAstStatusRequest_AST> vec; vec.emplace_back(new UpdateAstStatusRequest_AST()); // 错误！ ``` 或智能指针初始化时参数错误： ```cpp std::shared_ptr<std::vector<jgproto::UpdateAstStatusRequest_AST>> ptr( new UpdateAstStatusRequest_AST() // 类型不匹配 ); ``` --- ### **4. 修复方案** #### **(1) 修正模板类型语法** 确保所有 `std::vector` 声明包含完整的模板参数： ```cpp // 正确写法 std::vector<jgproto::UpdateAstStatusRequest_AST> vec; ``` #### **(2) 检查构造函数调用** - **若使用 `emplace_back`：** 直接传递构造参数（而非指针）： ```cpp vec.emplace_back(arg1, arg2); // 参数需匹配 UpdateAstStatusRequest_AST 的构造函数 ``` - **若使用智能指针：** 确保模板类型与实际构造类型一致： ```cpp // 正确示例：构造 vector 的智能指针 auto ptr = std::make_shared<std::vector<jgproto::UpdateAstStatusRequest_AST>>(); ``` #### **(3) 验证头文件依赖** 检查 `jgproto::UpdateAstStatusRequest_AST` 类的头文件是否正确定义，并确认包含关系无误： ```cpp #include "jgproto/update_ast_status_request.pb.h" // 假设为protobuf生成的文件 ``` --- ### **5. 常见关联问题** #### **(1) Protobuf 对象构造** 若 `UpdateAstStatusRequest_AST` 是Protobuf生成的类，其构造函数可能为 `protected`，需通过 `new` + `Builder` 或 `mutable_xxx()` 方法创建对象： ```cpp // Protobuf 对象构造示例 jgproto::UpdateAstStatusRequest_AST* ast = new jgproto::UpdateAstStatusRequest_AST(); ast->set_field1(value); vec.push_back(*ast); // 注意解引用 ``` #### **(2) 智能指针类型匹配** 确保 `shared_ptr` 的模板类型与实际分配类型完全一致： ```cpp // 错误示例：类型不匹配 std::shared_ptr<std::vector<int>> ptr(new int); // 错误！ // 正确示例 std::shared_ptr<std::vector<int>> ptr(new std::vector<int>()); ``` --- ### **6. 调试建议** #### **(1) 最小化复现代码** 提取错误相关的代码片段，构造一个最小化测试用例： ```cpp #include <vector> #include <memory> #include "jgproto/update_ast_status_request.pb.h" // 替换为实际头文件 int main() { std::vector<jgproto::UpdateAstStatusRequest_AST> vec; vec.emplace_back(/* 构造参数 */); return 0; } ``` #### **(2) 查看完整错误上下文** 通过 `g++ -E` 生成预处理后的代码，检查模板展开细节： ```bash g++ -E your_source.cpp > preprocessed.cpp ``` --- ### **7. 总结** - **核心问题**：类型名称语法错误（缺失 `<...>`）或构造函数参数类型不匹配。 - **解决步骤**： 1. 修正 `std::vector` 的模板参数格式。 2. 检查对象构造方式（避免直接传递指针）。 3. 验证Protobuf对象的构造方法。 若仍有问题，请提供相关代码片段以进一步分析。
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