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Re: [Scheme-reports] Formal Comment: Change syntax of symbols from |<symbol element>*| to #"<string element>*"
I'd like to add another option for ways to represent symbols. As far
as I know, it's standard to write unprintable objects, like
procedures, with "#<procedure>" or something similar. How about using
the "#< ... >" syntax for symbols? It would probably look something
like #<symbol "......">.
It doesn't actually seem very elegant to me, but it has the advantage
that it won't step on any syntax that people are currently using for
On Tue, Mar 13, 2012 at 1:31 AM, Alex Shinn <alexshinn@x> wrote:
> On Tue, Mar 13, 2012 at 2:02 PM, John Cowan <cowan@x> wrote:
>> Andrew Robbins scripsit:
>>> In terms of transmission, the (inline hex escape) lexical space of
>>> R6RS is sufficient to encompass most of the value space of (vertical
>>> bar) identifiers, with the added bonus of being able to be transmitted
>>> to interpreters and compilers via 8-bit unsafe channels and 7-bit
>>> encoded ASCII text files.
>> Everything except ||, the result of (string->symbol "").
>>> Neither (vertical bar) nor Unicode identifiers (also added in R6RS)
>>> can make this claim.
>> Vertical bar as defined in draft 6 allows inline hex escapes within the
>> bars, so it allows everything that inline hex escapes do.
>>> Why would we add 1114111 redundancies to Scheme identifier lexical
>>> space when the only addition to the value space is ||?
>> Vertical bars allow mixed-case identifiers in a case-folding context to
>> be readable. |Foo| is much more readable than \x46;oo, and |FOO| is
>> infinitely more readable than \x46;\x4F;\x4F;. This is the example that
>> convinced me of the virtues of |...|.
> I had already recommended before to use \x46; and \|...|
> as the single and multiple escape mechanism. That kills
> two birds with one character leaving |...| open. I think it's
> also not overly antagonistic to Gambit's six notation since
> neither an initial "|" nor "xNN;" would be meaningful in six.
> I'll add this option to the ballot.
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