例如：
class Example
{
public:
explicit Example(int n) : num(n) {}
void addAndPrint(vector<int>& v) const
{
for_each(v.begin(),v.end(),[num](int n) { cout << num + n << " "; });
}
private:
int num;
};
int main()
{
vector<int> v = { 0,1,2,3,4 };
Example ex(1);
ex.addAndPrint(v);
return 0;
}
当您在MSVC2010中编译并运行它时,您会收到以下错误：
错误C3480：’Example :: num’：lambda捕获变量必须来自封闭的函数作用域
但是,使用g 4.6.2(预发行版),您将得到：
1 2 3 4 5
根据标准草案,哪个编译器是正确的？
解决方法
5.1.2 / 9：
The reaching scope of a local lambda expression is the set of
enclosing scopes up to and including the innermost enclosing function
and its parameters.
和5.1.2 / 10：
The identifiers in a capture-list are looked up using the usual rules
for unqualified name lookup (3.4.1); each such lookup shall find a
variable with automatic storage duration declared in the reaching
scope of the local lambda expression.
