Current element is at the peek, the root element is at the bottom. Used to check if end tags match start tags.
# Stack of the current element type qname and of the qnames of the ancestors.
#
# Current element is at the peek, the root element is at the bottom.
# Used to check if end tags match start tags.
private var element_path = new Array[XmlName]
lib/saxophonit/reader_model.nit:24,2--28,46