class InsNode

• supers: Node

Insertions are represented by ins node records, where the subtype indicates the corresponding box number.

Example:

assert.node_type("ins", nil, {
  id = "ins (3)",
  fields = {
    "prev (-1)",
    "next (0)",
    "id (1)",
    "subtype (2)",
    "attr (3)",
    "cost (4)",
    "depth (5)",
    "height (6)",
    "spec (7)",
    "head (8)",
  },
})

Reference:

• Corresponding C source code: texnodes.c#L818-L824
• Donald Ervin Knuth. “TeX: The Program”: section 140, page 52 tex.pdf

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---

fields

---

InsNode.subtype

---

InsNode.subtype : number

the insertion class

InsNode.attr

---

InsNode.attr : Node {
    next: Node?,
    prev: Node?,
    id: integer,
    subtype: integer,
    head: Node?,
    attr: Node,
}

A list of attributes.

InsNode.cost

---

InsNode.cost : integer

the penalty associated with this insert

InsNode.height

---

InsNode.height : integer

height of the insert

InsNode.depth

---

InsNode.depth : integer

depth of the insert

InsNode.head

---

InsNode.head : Node {
    next: Node?,
    prev: Node?,
    id: integer,
    subtype: integer,
    head: Node?,
    attr: Node,
}

the first node of the body of this insert

InsNode.list

---

InsNode.list : Node {
    next: Node?,
    prev: Node?,
    id: integer,
    subtype: integer,
    head: Node?,
    attr: Node,
}

the first node of the body of this insert