Autocompletion in Vim

 

In a nutshell, I'm searching for a working autocompletion feature for the Vim editor. I've argued before that Vim completely replaces an IDE under Linux and while that's certainly true, it lacks one important feature: autocompletion.

I know about Ctrl+N, Exuberant Ctags integration, Taglist, cppcomplete and OmniCppComplete. Alas, none of these fits my description of “working autocompletion:”

  • Ctrl+N works nicely (only) if you've forgotton how to spell class , or while . Oh well.
  • Ctags gives you the rudiments but has a lot of drawbacks.
  • Taglist is just a Ctags wrapper and as such, inherits most of its drawbacks (although it works well for listing declarations).
  • cppcomplete simply doesn't work as promised, and I can't figure out what I did wrong, or if it's “working” correctly and the limitations are by design.
  • OmniCppComplete seems to have the same problems as cppcomplete, ie auto-completion doesn't work properly. Additionally, the tags file once again needs to be updated manually.

    • I'm aware of the fact that not even modern, full-blown IDEs offer good C++ code completion. That's why I've accepted Vim's lack in this area until now. But I think a fundamental level of code completion isn't too much to ask, and is in fact required for productive usage. So I'm searching for something that can accomplish at least the following things.

  • Syntax awareness . cppcomplete promises (but doesn't deliver for me), correct, scope-aware auto-completion of the following: 

    variableName.abc
variableName->abc
typeName::abc

    And really, anything else is completely useless.

  • Configurability . I need to specify (easily) where the source files are, and hence where the script gets its auto-completion information from. In fact, I've got a Makefile in my directory which specifies the required include paths. Eclipse can interpret the information found therein, why not a Vim script as well?

  • Up-to-dateness . As soon as I change something in my file, I want the auto-completion to reflect this. I do not want to manually trigger ctags (or something comparable). Also, changes should be incremental, ie when I've changed just one file it's completely unacceptable for ctags to re-parse the whole directory tree (which may be huge).

    • Did I forget anything? Feel free to update.

    I'm comfortable with quite a lot of configuration and/or tinkering but I don't want to program a solution from scratch, and I'm not good at debugging Vim scripts.

    A final note, I'd really like something similar for Java and C# but I guess that's too much to hope for: ctags only parses code files and both Java and C# have huge, precompiled frameworks that would need to be indexed. Unfortunately, developing .NET without an IDE is even more of a PITA than C++.

    Try YouCompleteMe. It uses Clang through the libclang interface, offering semantic C/C++/Objective-C completion. It's much like clang_complete, but substantially faster and with fuzzy-matching.

    In addition to the above, YCM also provides semantic completion for C#, Python, Go, TypeScript etc. It also provides non-semantic, identifier-based completion for languages for which it doesn't have semantic support.

    There's also clang_complete which uses the clang compiler to provide code completion for C++ projects. There's another question with troubleshooting hints for this plugin.

    The plugin seems to work fairly well as long as the project compiles, but is prohibitively slow for large projects (since it attempts a full compilation to generate the tags list).

    as per requested, here is the comment I gave earlier:

    have a look at this:

  • Vim integration to MonoDevelop for .net stuff at least..
  • OmniCompletion

    • this link should help you if you want to use monodevelop on a MacOSX

    Good luck and happy coding.

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