"Justin Johansson" <n...@spam.com> wrote in message news:he768r$244...@digitalmars.com... > Nick Sabalausky wrote: >> 1. Floating point literals without digits on *both* sides!!! "1.", >> ".1" --> Useless hindrance to future language expansion! >> > > On 1. I understand you mean floating point literals without digits on > both sides of the decimal point should be disallowed. On basis of this > understanding I beg to differ on grounds that this *should* be allowed for > future language expansion. > > Rationale: Whilst D is not currently XML aware (to any meaningful level of > standards compliance), the language may go that way in the future. > Therefore I would suggest that the lexical form of all literals in the > language should be aligned with, or at least include the lexical forms of, > literals as allowed by XML Schema Part 2: Datatypes Second Edition > > http://www.w3.org/TR/xmlschema-2/ > > Specifically this does allow digits to be omitted from either size as per > the following lexical production: > > DoubleLiteral ::= > (("." Digits) | (Digits ("." [0-9]*)?)) [eE] [+-]? Digits > > It is noted, of course, that D does provide the very programmer-friendly > mechanism of allowing underscores to used to separate digits in integer > literals. Whilst integers with embedded underscores are not included in > the lexical space of integers as in cited XML Schema Datatypes, I do not > argue against them. In other words, whatever D supports with respect to > the lexical forms of literals is fine so long as it *does not* preclude > lexical forms from XML Schema Datatypes. >
I'm not sure I understand the usefulness of doing that, or what exactly you mean by a language being XML-aware. If you mean it would help translating some sort of special XML files into D code, then supporting those types of float literals from xml would be trivial to special-case. Or if you mean doing some sort of XML->D translation via XSLT: in my experience, I've found that XSLT is in general a very poor choice for anything other than XML->XML translations. Other than that, I don't understand the point...?
