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Made ANTLR Token LexerInputCharStream Friendly #5292

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merged 1 commit into from
Jan 14, 2023

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lkishalmi
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This fix makes ANTLR Token getText() and toString() methods usable when the lexer is backed by LexerInputCharStream. Unfortunately it seems that ANTLR does not really honor their contract when saying some methods can throw UnsupportedOperationException. I may file a PR for ANTLR as well, till then, this one makes debugging easier.

I also dared to change the AbstractAntlrLexerBridge.mapToken(int antlrTokenType) -> AbstractAntlrLexerBridge.mapToken(org.antlr.v4.runtime.Token antlrToken) till it's in this phase. Mappers could take advantage on the full token info as the getText() method is working.

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@matthiasblaesing matthiasblaesing left a comment

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The change looks sane to me. The implementation of getText looks a bit strange, but I see, that it matches the implementation of CommonToken.

@lkishalmi lkishalmi merged commit 595660f into apache:master Jan 14, 2023
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