Bernard Hurley <bern...@marcade.biz> writes:
> On Mon, Sep 03, 2012 at 08:07:07PM +0000, d...@gnu.org wrote:
>>
>> flex documentation is pretty clear about backing up being very
>> expensive. I don't remember whether it was only expensive when it
>> happens, or whether the expense was more or less a fixed cost. However,
>> things like a4 are not actually rare in music input.
>>
>
> Would there be any future in allowing digits in identifiers provided
> the sequence started with a 0. So a04 would be an identifier but
> a4 not. This seems to avoid the backing up problem.
Not really: the lexer does not even recognize durations. That is the
prerequisite of the parser.
Here is another "cure" for that request: if we can get used to writing
"violin1" = { ... }
for defining a name with numbers in it, it would be an obvious syntax
extension to allow its invocation as
\"violin1"
A somewhat non-obvious disadvantage is that this is likely to confuse
the syntax highlighting of editors used to C-like strings, since \" is
not a string delimiter at least inside of C strings, and so it might not
be considered a string starter.
--
David Kastrup
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