[Rd] Problem with ?Syntax
ggrothendieck at gmail.com
Sat Feb 20 13:07:44 CET 2010
I wasn't claiming there was an ambiguity but it does not perform
according to the operator precedence documented in ?Syntax . If it
performed as documented it would give an error.
On Sat, Feb 20, 2010 at 6:57 AM, Barry Rowlingson
<b.rowlingson at lancaster.ac.uk> wrote:
> On Sat, Feb 20, 2010 at 9:52 AM, Gabor Grothendieck
> <ggrothendieck at gmail.com> wrote:
>> In ?Syntax [ is given as higher priority than $ but BOD$demand
>> seems to be the same as (BOD$demand) contrary to [ being higher
>>  19
>>  19
>> What is the rule being used here?
> I think its the parser rule that defines the syntax of $ on a list. Does:
> BOD$(demand) even work?
> Error: unexpected '(' in "BOD$("
> - no. The parser sees a $ and then gets the next token (gram.y shows
> this to be a symbol or a string constant) as the thing to deal with.
> Symbols I can't think of an example where $ and [ could have
> ambiguous precedence that is syntactically correct, so maybe the order
> is irrelevant...
> Just for fun:
>  2
>  1
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