[RK_2014_1020]Cannot declare member function ‘static int Foo::bar()’ to have static linkage
1.
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 keyword static 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 static keyword in the definition. The compiler still knows that the variable/method is part of the class and not the instance.
WRONG
Foo.h:
class Foo
{
public:
static int bar();
};
Foo.cc:
static int Foo::bar()
{
// stuff
}
WORKS
Foo.h:
class Foo
{
public:
static int bar();
};
Foo.cc:
int Foo::bar()
{
// stuff
}
A way to bypass this problem is to embed the defintion in the .h file, but this causes the function to be inline by default.
ALSO WORKS
Foo.h:
class Foo
{
public:
static int bar()
{
// stuff
};
};
2.
test.cpp:285: cannot declare member function `static int
CTest::testEtrance(short unsigned int)' to have static linkage
错误的原因就是在实现的地方不需要static了, 只在声明的地方需要static
static int CTest::testEtrance(WORD wCaseNO)
{
}
static 是多余的, 把static删除就可以解决这样的编译错误.
3.本文网址[tom-and-jerry发布于2014-10-20 18:02]