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487 B

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