Not show contextual generator for members of enum and members of typedef.

Problems:
![1](https://f.cloud.github.com/assets/1700940/1331459/9714637e-3558-11e3-9054-328ab26246f2.png)
![2](https://f.cloud.github.com/assets/1700940/1331460/9915e4c2-3558-11e3-91be-c3a27bc8a481.png)
![3](https://f.cloud.github.com/assets/1700940/1331461/9b018778-3558-11e3-8b9a-adde6712a849.png)