Two phase lookup - explanation needed
Solution 1:
Templates are compiled (atleast) twice:
-
Without Instantiation the template code itself is checked for syntax.
Eg: Any syntax errors such as;etc. -
At the time of instantiation(when the exact type is known), the template code is checked again to ensure all calls are valid for that particular type.
Eg: The template might in turn call to functions which might not be present for that particular type.
This is called as Two Phase Lookup.