[Haskell-beginners] Usage of $

[Rein Henrichs]

I can't imagine that you actually believed in good faith that I would be
confused about whether a Haskell compiler would contain a Haskell parser.

On Mon, Jun 8, 2015 at 12:31 PM Mike Meyer <mwm at mired.org> wrote:

> My apologies if I came off as rude. That was not my intent.
>
> On Mon, Jun 8, 2015 at 2:28 PM, Rein Henrichs <rein.henrichs at gmail.com>
> wrote:
>
>> You said,
>>
>> > s mp $ n - 1 parses as s mp (n - 1)
>> > s mp n - 1 parses as (s mp n) - 1
>>
>> This is not how they parse. This is how they *evaluate*. A description of
>> how they *parse* would have included the ($) token in a parse tree.
>>
>> This mistake is what lead to our confusion and your rudeness hasn't
>> helped to clarify things. Rather than pretending that we're idiots for not
>> understanding what you meant, it would have been better if you had just
>> said what you meant.
>>
>> On Mon, Jun 8, 2015 at 12:18 PM Mike Meyer <mwm at mired.org> wrote:
>>
>>> The OP's problem wasn't with the semantics of $. The OP's problem was
>>> that the two expression had different parse trees that gave him different
>>> results when evaluated. So not only was there parsing happening here, but
>>> it was the root cause of his confusion.
>>>
>>> Given that the output of GHC's parser was the cause of the confusion, I
>>> couldn't think of anything else you might have meant that made sense in
>>> context.
>>>
>>> On Mon, Jun 8, 2015 at 2:06 PM, Rein Henrichs <rein.henrichs at gmail.com>
>>> wrote:
>>>
>>>> Of course not. What a silly thing to suggest. I'm saying that parsing
>>>> is not relevant to the behavior of ($). The parser can't tell the
>>>> *semantic* difference between $ and any other operator.
>>>> On Mon, Jun 8, 2015 at 11:02 AM Mike Meyer <mwm at mired.org> wrote:
>>>>
>>>>> Are you saying that GHC doesn't have a haskell parser?
>>>>> On Mon, Jun 8, 2015 at 12:06 PM, Rein Henrichs <
>>>>> rein.henrichs at gmail.com> wrote:
>>>>>
>>>>>> The point is that there is no parsing happening here. Just
>>>>>> evaluation.
>>>>>>
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