[rules-dev] Parameterized Evaluator Definition using \u2282 as parameter

[Wolfgang Laun]

Off the cuff ;-)

DRL accepts Unicode letters for identifier, and any character in string
literals.
Normally, this would make a language fully unicodable, but DRL has a few
nooks and crannies where the syntax isn't fully specified by the language.
For instance, after all the temporal operators, you may write '[' <text>
']',
and the parser will, no: should: accept anything as long as brackets
contained
in <text> are properly balanced.

DSL shouldn't be a problem, since parsing it is a relatively simple pattern
matching
operation (with some frills).

On 21 October 2010 21:55, Michael Anstis <michael.anstis at gmail.com> wrote:

> Yes you are naughty ;-)
>
> But it does lead me to question whether DRL and DSL can be unicode encoded
> (so DSL at least) can be localised language (U+007F is the end of Basic
> Latin/ASCII). Do you know the answer in your delvings?
>
> On 21 October 2010 20:25, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
>
>> Well, yes, I'm naughty. I've implemented a  parameterized evaluator, using
>> Unicode codepoint U+2282<http://www.fileformat.info/info/unicode/char/2282/index.htm>as a parameter.
>>
>> But the DRL parser refuses to accept this (as part of square_chunk_data):
>>   Line 60:59 no viable alternative at input ''
>> which indicates that the character isn't recognized at all.
>>
>> I think this happens because, outside of strings, codepoints beyond U+007F
>> aren't accepted anywhere except
>> those explicitly specified as IdentifierStart and IdentifierPart. Perhaps
>> square_chunk_data after an operator
>> identifier could be made to behave more like a string.
>>
>> Admittedly, this is esoteric, but it sure does look dazzling ;-)
>>
>> Cheers
>> -W
>>
>>
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>>
>
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