RegexNode

// A node of a parsed pattern. Kind: 0 the end of the pattern, 1 a literal unit, 2 a class (Table), 3 `.`, 4 a
// sequence, 5 alternatives, 6 a group's start, 7 its end, 8 a repeat, 9 the end of one iteration of a repeat, 10 `^`,
// 11 `$`, 12 `\b`, 13 `\B`. Once the pattern is parsed, every node knows the node after it (Next), so matching walks
// fixed links and allocates nothing.
public class System.Text.RegexNode : System.Any
{
    field Kind: i32
    field Literal: u8
    field Table: u8[]
    field Children: System.List<System.Text.RegexNode>
    field Child: System.Text.RegexNode
    field Repeat: System.Text.RegexNode
    field Next: System.Text.RegexNode
    field Index: i32
    field Min: i32
    field Max: i32
    field Count: i32
    field Lazy: bool
    // A repeat of one literal, class or `.`: matched by a loop over the units (no iterations).
    field Units: bool
    constructor RegexNode(kind: i32)
}