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BNFC does not support \r and \f (lexer error) #257

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andreasabel opened this issue May 21, 2019 · 2 comments
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BNFC does not support \r and \f (lexer error) #257

andreasabel opened this issue May 21, 2019 · 2 comments
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@andreasabel
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enhancement lexer Concerning the generated lexer
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2.8.3

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@andreasabel
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BNFC chokes on a definition like the following in the grammar file.

token Name (char - [ "-(){};.@\" \n\r\t\f" ]) + ;

The reason is that the BNF lexer does handle \r (carriage return) and \f (form feed).
andreasabel added a commit that referenced this issue May 24, 2019
@andreasabel
[ #257 ] support \r and \f in BNFC, Haskell, Java, Ocaml (only \r)
c3bda39
andreasabel added a commit that referenced this issue May 24, 2019
@andreasabel
[ #257 ] Fixed problem with space character in lexer character set
c49d1fd
@jchook
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jchook commented Jun 29, 2019 •
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This seems like a critical issue.

If I cherry-pick your commits, will it fix this issue?

Also it appears BNFC does not support grammars with \0.

@andreasabel
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I now merged my PR. Let me know if there are problems still.

@andreasabel andreasabel added this to the 2.8.3 milestone Aug 27, 2019
@andreasabel andreasabel self-assigned this Aug 27, 2019
@andreasabel andreasabel added the lexer Concerning the generated lexer label Dec 15, 2019
andreasabel added a commit that referenced this issue Jan 19, 2020
@andreasabel
[ #249 Java ] fixed lexer regression introduced by #257 / #276
3745b86 
Don't use showLitChar for unicode characters!

b8701c3 broke #249 for Java/ANTLR in the lexer,
c49d1fd for Java/CUP.
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enhancement lexer Concerning the generated lexer
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@jchook @andreasabel