Ok. The parser reads a single complete expression and discards the rest. It
understands that once it has hit a new character that represents the
beginning of a new expression, it doesn't care.
I suppose I thought the parser would raise an error on detecting an
unmatched parenthesis, but that's wrong.
Interestingly, when I try this at the repl (1.5.1) it errors as I expected
(probably why I expected it in the first place):
user=> 1000N)
1000N
RuntimeException Unmatched delimiter: ) clojure.lang.Util.runtimeException
(Util.java:219)
Of course, the repl doesn't use "read-string." So, the next step in my
journey is to investigate the source of clojure.main. But - someone wants
to take the opportunity to ruin the surprise for me - with a more detailed
explanation / theory discussion - I'm open to it :)
On Monday, April 29, 2013 4:44:13 PM UTC-4, Ben wrote:
>
> Because "1000N" is a complete expression, as you can verify with your REPL.
>
>
> On Mon, Apr 29, 2013 at 1:43 PM, noahlz <nzu...@gmail.com <javascript:>>wrote:
>
>> Understood, but what I was wondering is why the trailing parenthesis is
>> discarded / not considered part of the "object" expression?
>>
>>
>> On Monday, April 29, 2013 4:32:49 PM UTC-4, Weber, Martin S wrote:
>>>
>>>
>>> user=> (doc read-string)
>>> -------------------------
>>> clojure.core/read-string
>>> ([s])
>>> Reads *one* object from the string s
>>> nil
>>> (emphasis on *one* by me)
>>>
>>> one object from ":a(" = :a; ":a)" = :a; "( … " = fail; ")…" = fail.
>>> (remember whitespace in front of a paren doesn't matter)
>>>
>>> Have fun.
>>>
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>
>
>
> --
> Ben Wolfson
> "Human kind has used its intelligence to vary the flavour of drinks, which
> may be sweet, aromatic, fermented or spirit-based. ... Family and social
> life also offer numerous other occasions to consume drinks for pleasure."
> [Larousse, "Drink" entry]
>
>
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