Question

对于下面的代码行，我收到以下编译错误，指出错误的模板参数数量。你能告诉我这个宣言有什么问题吗？它看起来不错。 ServicePartitionKey的内容在底部给出。

   //Line 107 where template arguments issue happens is this declaration line
   std::map<ServicePartitionKey key, std::vector<EndPointAddr*>* > mServiceMap;

汇编讯息：

In file included from ServiceRegistrar.hpp:8:0,
                 from ServiceRegistrar.cpp:7:
 ../control_api/ServiceRegistrarAPI.hpp:107:66: error: wrong number of template  arguments (1, should be 4)
In file included from /usr/include/c++/4.7/map:61:0,
             from ../control_api/ServiceRegistrarAPI.hpp:9,
             from ServiceRegistrar.hpp:8,
             from ServiceRegistrar.cpp:7:

Class ServicePartitionKey

#include <cstdint>

class ServicePartitionKey
{
 public:  
    ServicePartitionKey() {};
    ServicePartitionKey(uint32_t instanceNo, uint64_t version);
    ~ServicePartitionKey() {};

   bool operator < (const ServicePartitionKey &rhs) const;

   void setInstanceNo(uint32_t instanceNo) { mInstanceNo = instanceNo; }  
   uint32_t getInstanceNo() const { return mInstanceNo; }

   void setVersion(uint64_t version) { mVersion = version; }  
   uint64_t getVersion() const { return mVersion; } 

 private:
   uint32_t mInstanceNo;
   uint64_t mVersion;
};

Answer 1

模板应该只是类型。你为第一个提供了类似声明的语法：

std::map<ServicePartitionKey key, std::vector<EndPointAddr*>* > mServiceMap;
//                           ^^^

应该是：

std::map<ServicePartitionKey, std::vector<EndPointAddr*>* > mServiceMap;

std :: map声明 - 错误的模板

1 个答案: