egison-3.2.14: sample/xml-test.egi

(load "lib/tree/xml.egi")

(define $xml1
  <Node "top"
        {<Node "middle1" {<Leaf "bottom1" "text1">
                          <Leaf "bottom1" "text2">
                          <Leaf "bottom1" "text3">
                          <Node "bottom1" {<Leaf "bottom2" "text21">
                                           <Leaf "bottom2" "text100">
                                           <Leaf "bottom2" "text22">}>
                          }>
         <Node "middle2" {<Leaf "bottom3" "text31">
                          <Leaf "bottom3" "text32">
                          <Leaf "bottom3" "text33">
                          <Leaf "bottom3" "text31">
                          <Leaf "bottom3" "text35">
                          }>

         <Node "middle3" {<Leaf "bottom4" "text41">
                          <Leaf "bottom4"  "text42">
                          <Node "bottom4" {<Leaf "bottom2" "text51">
                                           <Leaf "bottom2" "text100">
                                           <Leaf "bottom2" "text53">}>
                          <Leaf "bottom4"  "text44">
                          <Leaf "bottom4"  "text53">
                          }>
         }>)


;; List up all tags.
(test (match-all xml1 xml
        [<descendant <mnode $tag _>  _> [tag]]))
; {top middle1 middle2 middle3 bottom1 bottom4}

;; List up all nodes which has more than two same child nodes.
(test (match-all xml1 xml
        [<descendant <mnode $tag <cons $x <cons ,x _>>>>
         [tag x]]))
; {[middle2 <Leaf bottom3 text31>] [middle2 <Leaf bottom3 text31>]}

;; List up all nodes which has more than two same descendant nodes.
(test (match-all xml1 xml
        [<descendant
          <mnode $tag
           <cons <descendant $x>
            <cons <descendant ,x>
             _>>>>
         [tag x]]))
; {[middle2 <Leaf bottom3 text31>] [middle2 <Leaf bottom3 text31>] [top <Leaf bottom2 text100>] [top <Leaf bottom2 text100>]}