链接 error2005 Visual Studio 2008 c++

发布于 2024-11-07 09:42:08 字数 1264 浏览 5 评论 0原文

我有 struct errorStruct & yacc.y 中的队列 errQueue 定义，然后将其移至单独的 .h 文件
但它给了我链接错误，该定义同时存在于 yacc.obj 和 node.obj !!
尝试创建新的解决方案，但仍然首先给出相同的错误

Error   9   error LNK2005: "class std::queue<struct errorStruct,class std::deque<struct          

errorStruct,class std::allocator<struct errorStruct> > > errQueue" (?errQueue@@3V?$queue@UerrorStruct@@V?

$deque@UerrorStruct@@V?$allocator@UerrorStruct@@@std@@@std@@@std@@A) already defined in Node.obj    yacc.obj

更新

：
Node.h // 用于节点类
yacc.y // 规则 + errorStruct + 队列 errQueue + ErrList 类：包括“Node.h” & <队列>

然后：

Node.h // 对于节点类 + errorStruct + 队列 errQueue + 类 ErrList ：包含 <队列>
yacc.y // 规则：

包含“Node.h”更新

在 Node.h 中

struct errorStruct{
            int errLineNum;
            int errColNum ;
            char * errMessage;
    };

class ErrList{

public:
void pushError(int line,int col,char * message);
void popError();    
void printErrors();
int getSize();

private :
queue <errorStruct> errQueue;

};
externErrList * se = new ErrList ();

， Node.h 的其余部分与此类无关
在 yacc.y 中仅使用
se->pushError(...);
并且没有类 ErrList 或 errQueue 的声明

原文

I had struct errorStruct & a queue errQueue definition in yacc.y , then moved it to separate .h file
but it gives me linking error that the definition is found in both yacc.obj and node.obj !!
tried creating new solution but still gives the same error

Error   9   error LNK2005: "class std::queue<struct errorStruct,class std::deque<struct          

errorStruct,class std::allocator<struct errorStruct> > > errQueue" (?errQueue@@3V?$queue@UerrorStruct@@V?

$deque@UerrorStruct@@V?$allocator@UerrorStruct@@@std@@@std@@@std@@A) already defined in Node.obj    yacc.obj

update

first :
Node.h // for node class
yacc.y // rules + errorStruct + queue errQueue + class ErrList : includes "Node.h" & < queue>

then:

Node.h // for node class + errorStruct + queue errQueue + class ErrList : includes < queue>
yacc.y // rules : includes "Node.h"

update

in Node.h

struct errorStruct{
            int errLineNum;
            int errColNum ;
            char * errMessage;
    };

class ErrList{

public:
void pushError(int line,int col,char * message);
void popError();    
void printErrors();
int getSize();

private :
queue <errorStruct> errQueue;

};
externErrList * se = new ErrList ();

the rest of Node.h has nothing to do with this class
in yacc.y just using
se->pushError(...);
and as no declaration of class ErrList or errQueue

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绝影如岚 2024-11-14 09:42:08

我相信您应该将代码组织为：

yacc.h   //-----> should have declaration of errQueue & errorStruct

yacc.cc  //-----> should include yacc.h, 
//It can create variables of type errQueue & errorStruct

node.cc  //-----> should include yacc.h
//It can create variables of type errQueue & errorStruct

请注意，声明应该只出现在 yacc.h 中，并且它应该包含在需要创建所述类型实例的所有 cc 文件中，如果除了标头（yacc.h）之外，您的任何 cc 文件中都声明了结构，那么您最终将收到您提到的重新定义错误。

I believe you should organize the code as:

yacc.h   //-----> should have declaration of errQueue & errorStruct

yacc.cc  //-----> should include yacc.h, 
//It can create variables of type errQueue & errorStruct

node.cc  //-----> should include yacc.h
//It can create variables of type errQueue & errorStruct

Note that the declarations should only be present in yacc.h and it should be included in all your cc files which need to create instances of the said types, If the structures are declared in any of your cc file in addition to the header(yacc.h) then you will end up getting the redefinition errors you mentiones.

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