1. that is missing, but mostly because nobody needed it yet, and I am not very familiar with repl style languages. I expect it to be implementable with current features.
2. The simplest way to do that is to set the makecmd option, options can be set per buffer, so each C++ buffer can have it set to the compile command for it. You'll get output in the make buffer.
3. I use ctags a lot, and it is well supported, it requires the readtags command that is provided by default in universal-ctags, and needs to be installed manually with the older exuberant ctags. There is no cscope support script AFAIK (although should be possible).
1. that is missing, but mostly because nobody needed it yet, and I am not very familiar with repl style languages. I expect it to be implementable with current features.
2. The simplest way to do that is to set the makecmd option, options can be set per buffer, so each C++ buffer can have it set to the compile command for it. You'll get output in the make buffer.
3. I use ctags a lot, and it is well supported, it requires the readtags command that is provided by default in universal-ctags, and needs to be installed manually with the older exuberant ctags. There is no cscope support script AFAIK (although should be possible).