gistfile1.nim

macro loadValue(dest, source: untyped, key: static[string], required=true): untyped =
  ## Loads a value from a JSON node to a member of the same name
  let keyIdent = ident(key)
  result = quote do:
    when `required`:
      var node = `source`[`key`]
    else:
      var node = `source`.getOrDefault(`key`)

    if node != nil:
      when type(`dest`) is string:
        `dest`.`keyIdent` = getStr(node, `dest`.`keyIdent`)
      when type(`dest`) is int:
        `dest`.`keyIdent` = getNum(node, `dest`.`keyIdent`)
      when type(`dest`) is float:
        `dest`.`keyIdent` = getFNum(node, `dest`.`keyIdent`)
      when type(`dest`) is bool:
        `dest`.`keyIdent` = getBVal(node, `dest`.`keyIdent`)