Template within template: why “`>>' should be `> >' within a nested template argument list” 解决方法

如果直接这样写：

vector<pair<string, int>> word;

gcc编译器会把">>"当成operator,报错：boost vector  error: ‘>>’ should be ‘> >’ within a nested template argument list

 

正确做法是加上空格： “ ”

vector<pair<string, int> > word;