On Mon, Feb 6, 2012 at 2:04 PM, Mark Miesfeld <[email protected]> wrote: > In trunk this line of code raises an error condition: > > x = 3aE+6 > > But, in 4.1.0 and all the way back to 3.0.0 it is accepted. > > I see that according to the definition of numbers: > > > The definition of numbers is, therefore, extended as follows: > >>>-+------------+--+----------------------+--+-digits--------+----------> > > +-whitespace-+ +-sign--+------------+-+ +-digits.digits-+ > > +-whitespace-+ +-.digits-------+ > > +-digits.-------+ > >>--+---------------------+--+------------+------------------------->< > > +-E--+------+--digits-+ +-whitespace-+ > > +-sign-+ > > > > the 'a' is not valid if we use the statement: "digits are one or more of the > decimal digits 0-9" from the first, un-extended definition.
The rule that applies here is not the definition of a number, but the definition of a SYMBOL. Section 1.10.4.4. This states: One other form of symbol is allowed to support the representation of numbers in exponential format. The symbol starts with a digit (0-9) or a period, and it can end with the sequence E or e, followed immediately by an optional sign (- or +), followed immediately by one or more digits (which cannot be followed by any other symbol characters). The sign in this context is part of the symbol and is not an operator. These are valid numbers in exponential notation: 17.3E-12 .03e+9 By this definition, 3ae+6 should be scanned as a single symbol token (the old behavior). I'm not aware of any updates that would have changed this behavior. Rick > > But, under the extended definition, there is no statement as to what > 'digits' is. > > This seems like such a fundamental change. > > Has ooRexx always been wrong and this is just fixed in 4.2.0? Since 3.0.0 > is, I've always assumed, the same as IBM' Object Rexx, was this wrong there > also? > > > > -- > > Mark Miesfeld > > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Oorexx-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/oorexx-devel > ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Oorexx-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/oorexx-devel
