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Subject: Re: Ada platforms and pricing, was: Re: a new language,
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On 25-Jun-14 20:04, Yannick Duchêne (Hibou57) wrote:
> Le Thu, 19 Jun 2014 22:59:38 +0200, Randy Brukardt
> <randy@rrsoftware.com> a écrit:
>
>> "Peter Chapin" <PChapin@vtc.vsc.edu> wrote in message
>> news:tYmdnRDwdcBVTz_ORVn_vwA@giganews.com...
>> ...
>>> My understand is that parsing Ada requires name resolution to resolve
>>> syntactic ambiguities.
>>
>> Definitely not. Janus/Ada uses a table-driver parser that has
>> absolutely no
>> semantic information. There has to be a bit of care in tokenizing (for
>> the
>> infamous T'('A') example) but parsing is completely normal.
>
> If “definitely not”, how do you make “F(A)” and “G(A)” distinct, when F
> is a sub‑program  and G an array? (the most famous example). Don't you
> use name resolution there? Or else do you use an intermediate construct,
> like array access temporarily seen as a function? If not this, how?

You don't need to make them distinct, at least not at the 
tokenizer-level. Determining what Some_Name(Some_Parameter) is within 
the realm of the semantic-analysis as Some_Name could refer to: a type, 
a subprogram, an array... Some_Parameter could be a value or a subtype 
[if Some_Name is a range-subtype], and all of these permutations are 
semantic responsibility rather than syntactic.