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