This is Vim script language (a.k.a. VimL) parsers.
The parser to make AST (Abstract Syntax Tree)
This parser provide same feature for following languages.
All of interfaces are provided from vimlparser module. VimLParser parse into AST using StringReader, and Compiler to compile nodes.
let s:VP = vimlparser#import()
let code = [
\ 'let s:message = printf("hello %d", 1+(2*3))'
\]
let r = s:VP.StringReader.new(code)
let p = s:VP.VimLParser.new()
let c = s:VP.Compiler.new()
echo join(c.compile(p.parse(r)), "\n")
This above code output following.
(let = s:message (printf "hello %d" (+ 1 (* 2 3))))
We know a name "VimL" is not the common short form of "Vim scripting language". But we choice "VimL" for historical and practical reasons and compatibility.