ast

type Arg struct {
	Lbrace token.Pos // position of '{'
	List   List      // or stmt?
	Rbrace token.Pos // position of '}'
}

type Ident struct {
	NamePos token.Pos // identifier position
	Name    string    // identifier name
}

type List []Node

type Literal struct {
	LitPos token.Pos
	Text   string
}

type Macro struct {
	Name *Ident
	Args List
}

type MathExpr struct {
	Delim string    // delimiter used for this math expression.
	Left  token.Pos // position of opening '$', '\(', '\[' or '\begin{math}'
	List  List
	Right token.Pos // position of closing '$', '\)', '\]' or '\end{math}'
}

type Node interface {
	Pos() token.Pos // position of first character belonging to the node.
	End() token.Pos // position of first character immediately after the node.
	// contains filtered or unexported methods
}

type OptArg struct {
	Lbrack token.Pos // position of '['
	List   List
	Rbrack token.Pos // position of ']'
}

type Sub struct {
	UnderPos token.Pos
	Node     Node
}

type Sup struct {
	HatPos token.Pos
	Node   Node
}

type Symbol struct {
	SymPos token.Pos
	Text   string
}

type Visitor interface {
	Visit(node Node) (w Visitor)
}

type Word struct {
	WordPos token.Pos
	Text    string
}