问题
What is POI? I have seen this term being used several times in context of C++ Templates. What does it mean?
回答1:
POI means Point Of Instantiation.
From C++ Templates : The Complete Guide
10.3.2 Points of Instantiation
A point of instantiation (POI) is created when a code construct refers to a template specialization in such a way that the definition of the corresponding template needs to be instantiated to create that specialization. The POI is a point in the source where the substituted template could be inserted.:
回答2:
Point Of Instantiation. It's important with templates largely because the meaning of a symbol inside the template can depend on the meaning attached to that symbol at the point of instantiation.
来源：https://stackoverflow.com/questions/3866215/what-is-poi-and-what-does-it-mean