"Cannot declare member function ...to have static linkage"错误
2014-10-05 09:46
621 查看
基本的语法错误,郁闷了我半天,相关的资料可以参考:http://cplusplus.syntaxerrors.info/index.php?title=Cannot_declare_member_function_%E2%80%98static_int_Foo::bar()%E2%80%99_to_have_static_linkage
英文解释:
if you declare a method to be static in your .cc file.
The reason is that static means something different inside .cc files than in class declarations It is really stupid, but the keywordstatic has three
different meanings. In the .cc file, the static keyword means that the function isn't visible to any code outside of that particular file.
This means that you shouldn't use static in a .cc file to define one-per-class methods and variables. Fortunately, you don't need it. In C++, you are not allowed to have static variables or static methods with the same name(s) as instance variables
or instance methods. Therefore if you declare a variable or method as static in the class declaration, you don't need the statickeyword in the definition. The compiler still knows that the variable/method is part of the class and not the instance.
错误的:
Foo.h:
class Foo
{
public:
static int bar();
};
Foo.cc:
static int Foo::bar()
{
// stuff
}
正确的:
Foo.h:
class Foo
{
public:
static int bar();
};
Foo.cc:
int Foo::bar()
{
// stuff
}
这个也是正确的:
Foo.h:
class Foo
{
public:
static int bar()
{
// stuff
};
};
英文解释:
if you declare a method to be static in your .cc file.
The reason is that static means something different inside .cc files than in class declarations It is really stupid, but the keywordstatic has three
different meanings. In the .cc file, the static keyword means that the function isn't visible to any code outside of that particular file.
This means that you shouldn't use static in a .cc file to define one-per-class methods and variables. Fortunately, you don't need it. In C++, you are not allowed to have static variables or static methods with the same name(s) as instance variables
or instance methods. Therefore if you declare a variable or method as static in the class declaration, you don't need the statickeyword in the definition. The compiler still knows that the variable/method is part of the class and not the instance.
错误的:
Foo.h:
class Foo
{
public:
static int bar();
};
Foo.cc:
static int Foo::bar()
{
// stuff
}
正确的:
Foo.h:
class Foo
{
public:
static int bar();
};
Foo.cc:
int Foo::bar()
{
// stuff
}
这个也是正确的:
Foo.h:
class Foo
{
public:
static int bar()
{
// stuff
};
};
相关文章推荐
- "Cannot declare member function ...to have static linkage"错误
- "Cannot declare member function ...to have static linkage"错误
- "Cannot declare member function ...to have static linkage"错误
- "Cannot declare member function ...to have static linkage"错误
- static成员"Cannot declare member function ...to have static linkage"错误
- Cannot declare member function ...to have static linkage"问题
- error"Cannot declare member function ...to have static linkage"
- Cannot declare member function ‘static int Foo::bar()’ to have static linkage
- 【c++】cannot declare member function *** to have static linkage [-fpermissive]
- 提示"illegal reference to data member'CPMAgentManageDlg::m_matrixMatrixSt'in a static member function"
- 出现错误"illegal call of non-static member function"?
- "XX cannot be resolved to a type "eclipse报错及解决
- "The connection to adb is down, and a severe error has occured"错误解决方法
- java hibernate 中"node to traverse cannot be null"错误解决
- interbase "Cannot attach to password database"错误解决一例
- java hibernate 中"node to traverse cannot be null"错误解决办法
- "Cannot allocate memory" OutofMemory when call Ant to build Polish project in Tomcat
- Android中的"Unable to start activity ComponentInfo"或者"Unable to instantiate activity ComponentInfo"的错误
- error C2894: templates cannot be declared to have 'C' linkage
- Cannot refer to a non-final variable * inside an inner class defined in a different method"错误解析