问题
I remember from some time ago that Eclipse had auto-complete when you type, and now I can only get it when pressing Ctrl + Space. I already checked and don't have any unresolved dependencies, I can see all the auto-complete choices when pressing Ctrl + Space, but that's not something I like to do every-time... Can someone point me in the direction to get auto-complete back? (Using CDT C++)
回答1:
At some point recently (not sure but since March 2013?) my Eclipse CDT stopped auto completion. I figured out that at Editor->Content Assist->Advanced checking Parsing-based Proposals lets auto completion work on my machine.
Ubuntu 12.10, Eclipse 4.2.2, CDT 8.1.2
This snapshot shows Task-Focused, which I don't see on my another Eclipse instance. In that case I just checked Parsing-based Proposals and completion still works.
回答2:
This question is so valid even in 2018 with eclipse photon.
1) Go to Window > Prefrences > C/C++ > Editor > Content Assist > Advanced.
2) Check "Parsing-based proposal(Task-focused)".
3) Bind a key now by pressing "Ctrl + Space".
回答3:
I had a problem with Eclipse Juno (OSX Java "1.6.0_33") where the autocomplete (and save key binding) wasn't working properly. Googling I found this: Eclipse JUNO doesn't start
Updating my Mercurial Plugin to the latest (1.9.1) fixed both these issues for me.
Very weird.
来源：https://stackoverflow.com/questions/11399719/eclipse-cdt-autocomplete-not-working