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package lexer
type stateFunc func(*Lexer) stateFunc
type stateStack []stateFunc
func (ss *stateStack) Push(s stateFunc) {
*ss = append(*ss, s)
}
func (ss *stateStack) Pop() (s stateFunc) {
if len(*ss) == 0 {
return nil
}
*ss, s = (*ss)[:len(*ss)-1], (*ss)[len(*ss)-1]
return s
}
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