...This can be done on demand, or automatically as files are saved. If syntax errors are detected, the user is notified and is happy because they didn't have to compile their code or execute their script to find them. At the time of this writing, syntastic has checking plugins for ACPI Source Language, ActionScript, Ada, Ansible configurations, API Blueprint, AppleScript, AsciiDoc, Assembly languages, BEMHTML, Bro, Bourne shell, C, C++, C#, Cabal, Chef, CMake, CoffeeScript, Coco, Coq, CSS, Cucumber, CUDA, D, Dart, DocBook, Dockerfile, Dust, Elixir, Erlang, eRuby, Fortran, Gentoo metadata, GLSL, Go, Haml, Haskell, Haxe, Handlebars, HSS, HTML, Java, JavaScript, JSON, JSX, LESS, Lex, Limbo, LISP, LLVM intermediate language, Lua, Markdown, MATLAB, Mercury, NASM, Nix, Objective-C, Objective-C++, OCaml, Perl, Perl POD, PHP, etc.