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30 lines
487 B
30 lines
487 B
1 year ago
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package ddl
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import (
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"github.com/antlr4-go/antlr/v4"
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"unicode"
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)
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type CaseChangingStream struct {
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antlr.CharStream
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upper bool
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}
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func newCaseChangingStream(in antlr.CharStream, upper bool) *CaseChangingStream {
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return &CaseChangingStream{
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in,
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upper,
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}
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}
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func (is *CaseChangingStream) LA(offset int) int {
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in := is.CharStream.LA(offset)
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if in < 0 {
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return in
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}
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if is.upper {
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return int(unicode.ToUpper(rune(in)))
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} else {
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return int(unicode.ToLower(rune(in)))
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}
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}
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