On 15/03/2012, at 10:25 PM, john skaller wrote:
> This is a brief note in which I talk to myself and any lurkers out there
> about user defined literals.
>
The current status is: all literals are now in user space.
There are a couple of non-literal uses that remain to be fixed:
type x = c"...";
is a non-templating (non-polymorphic) version of
type x = "...";
Both these use strings, but they're not literals: literals
are constant expression values. Ditto for pattern matches:
they use the same lexicology but the use in
match x with
| "string" => ...
is a pattern string, not a literal. So there are a couple more cases
to finalise tonight AEST, then identifiers need to be done, and a couple
of tweeks and the lift will be well under way.
Other things to lift include comments: at the moment Felix has a fixed
idea of a comment, either a /* C comment which can /* be nested */
or not */ or a // C++ comment ending at line end.
If we were parsing Ocaml we'd want (* *) nestables instead,
and if it's Scheme then ; is the comment character, etc etc.
One advantage of all this is it may allow for adding documentation
in nicer way that "publish" or "comment" or just using Felix
comments. No idea.
There are a couple of other meta-things I want to do.
One is a system similar to the resource manager, only for licences.
The idea is you can say:
copyright Fred 2011 licence LGPL;
and something similar for C stuff (probably add licence info
into the *.fpc files). Then you can get licence information about
your program. For example you can say
flx --licence=FFAU
and you'll get a warning if you use any non-FFAU licences like
GPL or LGPL. Similarly you might do:
flx --os=Win
and you get a warning if you use any Posix code.
--
john skaller
skal...@users.sourceforge.net
http://felix-lang.org
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