Re: errata/290: Escaping keyword identifiers

From: Stephen Williams (steve@icarus.com)
Date: Sun Mar 02 2003 - 09:50:02 PST

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    The following reply was made to PR errata/290; it has been noted by GNATS.

    From: Stephen Williams <steve@icarus.com>
    To: "Brad Pierce" <Brad.Pierce@synopsys.com>
    Cc: etf-bugs@boyd.com
    Subject: Re: errata/290: Escaping keyword identifiers
    Date: Sun, 02 Mar 2003 09:48:01 -0800

     In 2.7.1, regarding escaped identifiers --
     
       "Neither the leading backslash character nor the terminating
        white space is considered to be part of the identifer.
        Therefore, an escaped identifier \cpu3 is treated the same
        as a nonescaped identifier cpu3."
     
     In 2.7.3, regarding keywords --
     
       "Keywords are predefined identifiers that are used to define
        the language constructs. A Verilog HDL keyword preceded by
        an escape character is not interpreted as a keyword."
     
     
     Brad.Pierce@synopsys.com said:
    > These paragraphs contradict each other. To me the exception for
    > keywords doesn't make sense. But if the exception must be preserved,
    > then section 2.7.1 should explicitly note it.
     
     They contradict only in the sense that keywords are unfortunately
     called "predefined identifiers" which they are not. They are keywords.
     They are lexical tokens. The "module" token is no more an identifier
     then the '+' character or an opening bracket '[' character.
     
     I don't think that the combination of your quotes causes one to
     conclude that \+ is the same as "+" and is therefore not an identifer.
     I therefore submit that confusion is from an unfortunate definition of
     a keyword.
     --
     Steve Williams "The woods are lovely, dark and deep.
     steve at icarus.com But I have promises to keep,
     steve at picturel.com and lines to code before I sleep,
     http://www.picturel.com And lines to code before I sleep."
     
     

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