func (p *printer) recordLine(linePtr *int) {
	p.linePtr = linePtr
}

// linesFrom returns the number of output lines between the current
// output line and the line argument, ignoring any pending (not yet
// emitted) whitespace or comments. It is used to compute an accurate
// size (in number of lines) for a formatted construct.
func (p *printer) linesFrom(line int) int {
	return p.out.Line - line
}