Don't make class SementicContext::Empty final. by hzeller · Pull Request #3776 · antlr/antlr4
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The class does not implement the pure virtual methods so can not be considered 'final'. Clang 10 and 11 complain about this. Context: chipsalliance/Surelog#3081 Signed-off-by: Henner Zeller <h.zeller@acm.org>
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