RE: [Yaml-core] allowing funny characters in scalars

[Oren Ben-K. <or...@be...>]

Rich Morin [mailto:rd...@cf...] wrote:
> So, here's another issue: allowing funny characters in scalars.

We allow as much as possible while avoiding ambiguity.

>    - [ isa, '?FROM', SocialBeing ]
> 
> but this is a bit ugly.

A bit. Luckily, the following is legal:

>    - [ isa, ?FROM, SocialBeing ]

Because '?' is a "space indicator".

> I strongly suspect that this is not the only situation where 
> someone will want to expand the character set of scalars, so 
> some sort of general solution is in order.  Is there one?

There's no way that, say, '!' would ever be a valid first character in a
plain scalar. That would be ambiguous with a transfer method. Likewise
for '&', '*' and so on. The only truly 'general solution' is to use
quotes :-)

Have fun,

	Oren Ben-Kiki