code: func NewPathExpression(pos int, line int, data bool) *PathExpression {
  	result := &PathExpression{
  		NodeType: NodePath,
  		Loc:      Loc{pos, line},
  
  		Data: data,
  	}
  
  	if data {
  		result.Original = "@"
  	}
  
  	return result
  }
docs: // NewPathExpression instanciates a new path expression node.