Comment by atrettel

I suppose this is like a lot of tools in general: you just get used to doing it yourself. People wrote code before tools like that existed, and you can too if you put your mind to it.

I typically just use plain Vim without much customization. You get used to it. I am somewhat forced to use just plain Vim on most things because I often write code on random HPC servers and have no control over what is available. But Vim is universally available, so I got good at the one tool available to me. Vim does have have Ctrl-P to auto-complete a word, though.

I also have books and other documentation available, when possible. Man pages are actually quite good and available on many systems I work on. For C, you can type something like "man 3 printf" to get basic documentation on "printf". This works for MPI too with things like "man 3 mpi_allreduce". I've been pleasantly surprised at times how much offline documentation is available.