Antwort: Re: Bison: Syntax error with german "umlaute"

[Hans Aberg]

Hallo Mr.Haberg,

first of all many thanks for your reply!

>> How can I avoid this error?

>If you are using Flex, check that it produces 128 character tables.

But:  How can I check, that Flex produces 128-Character-Tables?

Mit freundlichen Grüßen / Best regards

Dr.Wolfgang Gabriel
DaimlerChrysler Bank
IM-DMG





address@hidden am 01.07.2002 14:22:35

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>> From: Wolfgang Gabriel <address@hidden>
>> Date: 27 Jun 2002 23:51:00 -0700
>
>> using Bison V1.25 (under HP-UX) I always get a "Syntax error"
>> (function YYERROR will be called) if the parsed source code contains
>> german umlaute

This seems to be a lexer problem, not a Bison problem, as Bison only parser
the token numbers it receives.

>> How can I avoid this error?

If you are using Flex, check that it produces 128 character tables.


At 01:58 -0700 2002/07/01, Paul Eggert wrote:
>Most likely you are on a host with signed char, and your umlauted
>character code has a negative value after it is converted to type
>'char'.  When yylex returns a negative value, that is considered to be
>end-of-input.

Actually, it works on MacOS my CodeWarrior compiler, which I think uses
signed characters. (I have checked on such nasty characters as 127, which
might be confudes with -1, but it works OK, it seems.) So Flex seems to do
the right thing.

Check the Flex manual, and for Flex help/bugs, use the
  Help-flex mailing list
  address@hidden
  http://mail.gnu.org/mailman/listinfo/help-flex

  Hans Aberg