包含元组时的类型问题
我正在使用带有功能包 1 的 Visual Studio 2008。
我有一个像这样的 typedef typedef std::tr1::tuple 具有这样的函数 consttileInfo& GetTile(int x, int y) const。
在实现文件中，该函数具有完全相同的签名（带有添加的类名限定符），并且我收到重新定义：不同类型修饰符错误。 tileInfo&int& 而不是 tileInfo&
当我将鼠标悬停在标题中的函数类型（即 > 它会弹出一个小栏，上面写着static const inttileInfo。我认为这可能是问题所在，但我不知道该怎么办。它让我相信编译器认为 std::tr1::tuple
如有任何帮助，我们将不胜感激，谢谢。
PS 这是一个模拟相同情况的示例，只是压缩到最小。
#include <tuple>
class Blah {
public:
typedef std::tr1::tuple<std::string, std::string, int> tileInfo;
tileInfo& GetTile( int x, int y ); // When you mouse over tileInfo in this line, it says static const int
...
};
I'm using Visual Studio 2008 with Feature Pack 1.
I have a typedef like this typedef std::tr1::tuple<std::string, std::string, int> tileInfo
with a function like this const tileInfo& GetTile( int x, int y ) const.
In the implementation file the function has the exact same signature (with the added class name qualifier) and I am getting a redefinition: different type modifiers error. It seems to be looking for an int& instead of a tileInfo&
When I mouse over the type of the function in the header, i.e. tileInfo& it brings up a little bar saying static const int tileInfo. I think this may be the problem, but I'm not sure what to do. It leads me to believe that the compiler thinks std::tr1::tuple<std::string, std::string, int> is a static const int.
Any help is appreciated, thanks.
P.S. Here is an example emulating the same situation, just compacted to the minimum.
#include <tuple>
class Blah {
public:
typedef std::tr1::tuple<std::string, std::string, int> tileInfo;
tileInfo& GetTile( int x, int y ); // When you mouse over tileInfo in this line, it says static const int
...
};
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确保您在
typedef中包含了头文件。听起来编译器无法看到
typedef，因此tileInfo< 的类型/code> 默认为int。Make sure you included header file with the
typedef.It sounds like compiler can't see the
typedefso the type oftileInfodefaults toint.似乎当使用 typedef 作为返回类型或局部变量时，即使在类中，我也必须使用类名来限定它。例如，标头中的
GetTile签名应该是TileMap::tileInfo& GetTile( int x, int y );我认为当函数位于具有 typedef 的类中时，您不需要执行此操作。It seems that when using the typedef as a return type or a local variable, even within the class, I had to qualify it with the class name as well. For example the
GetTilesignature in the header should have beenTileMap::tileInfo& GetTile( int x, int y );I thought that you didn't need to do this when the function is in the class with the typedef.