file.ebi

struct Vec2 {
    a: Int
    b: Int
}

def dot(a: Vec2, b: Vec2): Int {
    return a.x*b.x + a.y*b.y
}

parse_tree.txt

(block end-of-line
  (struct keyword 'struct'
    (name identifier 'Vec2')
    (null null)
    (list '{'
      (param identifier 'a'
        (name identifier 'a')
        (name identifier 'Int')
      )
      (param identifier 'a'
        (name identifier 'a')
        (name identifier 'Int')
      )
      (param identifier 'b'
        (name identifier 'b')
        (name identifier 'Int')
      )
      (param identifier 'b'
        (name identifier 'b')
        (name identifier 'Int')
      )
    )
  )
  (def keyword 'def'
    (name identifier 'dot')
    (null null)
    (block '('
      (param identifier 'a'
        (name identifier 'a')
        (name identifier 'Vec2')
      )
      (param identifier 'a'
        (name identifier 'a')
        (name identifier 'Vec2')
      )
      (param identifier 'b'
        (name identifier 'b')
        (name identifier 'Vec2')
      )
      (param identifier 'b'
        (name identifier 'b')
        (name identifier 'Vec2')
      )
    )
    (name identifier 'Int')
    (block '{'
      (return keyword 'return'
        (binop '+'
          (binop '*'
            (field '.'
              (name identifier 'a')
              (name identifier 'x')
            )
            (field '.'
              (name identifier 'b')
              (name identifier 'x')
            )
          )
          (binop '*'
            (field '.'
              (name identifier 'a')
              (name identifier 'y')
            )
            (field '.'
              (name identifier 'b')
              (name identifier 'y')
            )
          )
        )
      )
    )
  )
)