promql/lex.go
func (l *lexer) nextItem() item {
	item := <-l.items
	l.lastPos = item.pos
	return item
}
func (l *lexer) nextItem() item {
	item := <-l.items
	l.lastPos = item.pos
	return item
}
func ( l * lexer ) nextItem ( ) item { item := <- l . items l . lastPos = item . pos return item }
// nextItem returns the next item from the input.
nextItem returns the next item from the input .