example.nim

proc wire(...) = # declared somewhere else

macro class(name, definition: untyped): untyped =
  ...
  
  var 
    this = genSym(nskVar, "this")
    toInject = quote do:
      var `this` {.importc, nodecl.}: JsObject
      wire(`this`) # I'm just hardcoding this for now
  
  let jsClassDef = """
    class Rectangle {
      constructor(width, height) {
        this.width = width;
        this.height = height;
      }

      render() {
        $1
      }
    };
  """
  
  var ls = genSym(nskLet)
  result = newStmtList.add(
    newLetStmt(
      ls,
      newCall(
        bindSym"%",
        newStrLitNode(jsClassDef.unindent()),
        toStrLit(toInject)
      )
    ),
    nnkPragma.newTree(
      nnkExprColonExpr.newTree(
        ident"emit",
        # How do I place the value assigned to ls here?!?!?!?
      )
    )
  )

when isMainModule:
  class Rectangle:
    width: int
    height: int
    constructor:
      this.width = width
      this.height = height
    proc render(): Element =
      return ${wire(this)};