package ast

// ConstantExpr is expression.
type ConstantExpr struct {
	Addr       Address
	Pos        Position
	Type       string
	Type2      string
	Extra      string
	ChildNodes []Node
}

func parseConstantExpr(line string) Node {
	groups := groupsFromRegex(
		`<(?P<position>.*)> '(?P<type>[\w ]+)'(:'(?P<type2>[\w ]+)')?( .*)?`,
		line,
	)
	if groups == nil {
		return &Unknown{}
	}

	return &ConstantExpr{
		Addr:       ParseAddress(groups["address"]),
		Pos:        NewPositionFromString(groups["position"]),
		Type:       groups["type"],
		Type2:      groups["type2"],
		Extra:      groups["extra"],
		ChildNodes: []Node{},
	}
}

// AddChild adds a new child node. Child nodes can then be accessed with the
// Children attribute.
func (n *ConstantExpr) AddChild(node Node) {
	n.ChildNodes = append(n.ChildNodes, node)
}

// Address returns the numeric address of the node. See the documentation for
// the Address type for more information.
func (n *ConstantExpr) Address() Address {
	return n.Addr
}

// Children returns the child nodes. If this node does not have any children or
// this node does not support children it will always return an empty slice.
func (n *ConstantExpr) Children() []Node {
	return n.ChildNodes
}

// Position returns the position in the original source code.
func (n *ConstantExpr) Position() Position {
	return n.Pos
}