c.size += len(p)
	return len(p), nil
}

// nodeSize determines the size of n in chars after formatting.
// The result is <= maxSize if the node fits on one line with at
// most maxSize chars and the formatted output doesn't contain
// any control chars. Otherwise, the result is > maxSize.
func (p *printer) nodeSize(n ast.Node, maxSize int) (size int) {
	// nodeSize invokes the printer, which may invoke nodeSize