纯虚函数实现体的放置位置

问：
class Deleteable
{
public:
    virtual ~Deleteable() = 0 {}

    virtual void deleteSelf()
    { delete this; }
};
在g++3.4.2中为什么无法编译通过（vc++8.0可以）？

答：
ISO/IEC 14882:2003(E)第10.4.2中指出：
    [Note: a function declaration cannot provide both a pure-specifier and a definition
    —end note] [Example:
    struct C {
        virtual void f() = 0 { }; // ill-formed
    };
    —end example]
所以在这一点上，g++是符合C++标准的，标准方法应当写成：
class Deleteable
{
public:
    virtual ~Deleteable() = 0;

    virtual void deleteSelf()
    { delete this; }
};
inline Deleteable::~Deleteable()
{
}