error , Symbol 'vector' could not be resolved

Question

I am using eclipse in linux to develop a c++ application and I am getting this editor annotation error \"Symbol \'vector\' could not be resolved\" from the following code

Answer 1

I had the same issue. I believe the problem arises from how std:: autocompletion is updated. Eclipse should be getting this from the Path and Symbols, but it could be buggy. I had to clean all Eclipse settings after upgrading gcc (thus, g++), since you're in Linux it's under your home folder ~/.eclipse/.

Thus,

1) Re-started Eclipse after cleaning ~/.eclipse/.

2) checked that Path and Symbols (under right-click on project > General > Path and Symbols) included all the upgraded gcc and c++ include directories (vector should be under ./gcc/version/include/c++/version/)

3) Rebuild index.

4) Created a *.cpp file that includes the *.h where the error is showing. This will force Eclipse to backtrace dependencies for *.h.

5) Rebuild index and/or restart a few times as required, now I can see vector at the end of std:: autocompletion.

(see picture)

Hope it helps!