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Re: Scannerless parsing was: Why does the lexer convert text integer lexemes ...?

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On 21/07/2022 13:41, Ev. Drikos wrote:
> ...
>
> [I don't see how this grammar will allow a comment before the statement.
> -John]


The where-used list of the separator contains four regular rules. Which
means I've added them explicitly, as shown at the end of the message.

What I suspect may be restrictive is that the lookahead operator accepts
only the next token, simply one letter in a scannerless grammar. Yet, in
SQL the (Unicode) delimited identifier doesn't end ie with a repeated
symbol as the identifier body of a regular identifier.

Here is the grammar for further inspection and error report:
https://gist.github.com/drikosev/3104c3cb79b0b4d8f41da6162f4c65d3


Regards,
Ev. Drikos


-----------------------------------------------------------------------
<direct SQL statement> ::=
            [ <separator> ] <directly executable statement> <semicolon>

<binary string literal>::= X<quote>[{<hexit><hexit>}...]<quote>
                [{<separator><quote>[{<hexit><hexit>}...]<quote>}...]


<national character string literal> ::= (too long) ...

<Unicode character string literal>  ::= (too long) ...

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Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Roger L Costello <costello@mitre.org> - 2022-07-14 10:25 +0000
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? gah4 <gah4@u.washington.edu> - 2022-07-14 10:03 -0700
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? George Neuner <gneuner2@comcast.net> - 2022-07-14 16:38 -0400
    Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Spiros Bousbouras <spibou@gmail.com> - 2022-07-15 07:08 +0000
    Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Jan Ziak <0xe2.0x9a.0x9b@gmail.com> - 2022-07-15 03:02 -0700
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Jan Ziak <0xe2.0x9a.0x9b@gmail.com> - 2022-07-15 10:50 -0700
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? George Neuner <gneuner2@comcast.net> - 2022-07-17 16:52 -0400
        Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Thomas Koenig <tkoenig@netcologne.de> - 2022-07-18 05:44 +0000
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? George Neuner <gneuner2@comcast.net> - 2022-07-17 18:01 -0400
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Kaz Kylheku <480-992-1380@kylheku.com> - 2022-07-15 14:41 +0000
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? "matt.ti...@gmail.com" <matt.timmermans@gmail.com> - 2022-07-16 05:32 -0700
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2022-07-17 13:10 -0400
    Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? gah4 <gah4@u.washington.edu> - 2022-07-17 20:39 -0700
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? gah4 <gah4@u.washington.edu> - 2022-07-19 16:39 -0700
        Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? luser droog <luser.droog@gmail.com> - 2022-07-21 14:16 -0700
      Scannerless parsing was: Why does the lexer convert text integer lexemes ...? "Ev. Drikos" <drikosev@gmail.com> - 2022-07-21 13:41 +0300
        Re: Scannerless parsing was: Why does the lexer convert text integer lexemes ...? "Ev. Drikos" <drikosev@gmail.com> - 2022-07-22 12:29 +0300

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