Looks like you left off a + in your regular expression for String.
On Mon, Jun 13, 2016 at 2:59 AM, Hussein B. <hubaghd...@gmail.com> wrote:
> Thanks for your help.
>
> I tried this new grammar to match characters only:
>
> "
>
> TEST = OBJECT
>
> <WHITESPACE> = <#'\\s+'>
>
> OBJECT = CURLY_OPEN WHITESPACE* STRING WHITESPACE* (WHITESPACE* OBJECT
> WHITESPACE*)* CURLY_CLOSE
>
> <CURLY_OPEN> = <'{'>
>
> <CURLY_CLOSE> = <'}'>
>
> STRING = #'[a-zA-Z]'
>
> "
>
>
> (parse "{harden {James}}")
>
>
> Parse error at line 1, column 3:
>
> {harden {James}}
>
> ^
>
> Expected one of:
>
> "}" (followed by end-of-string)
>
> "{"
>
> #"\s+"
>
> On Sunday, June 12, 2016 at 10:07:01 PM UTC+2, puzzler wrote:
>>
>> Regular expressions are treated with their ordinary Java/Clojure, greedy
>> semantics.
>>
>> Your regular expression for ITEM doesn't exclude whitespace or }
>> characters, so ITEM is matching "Harden }" which leaves no characters left
>> to match your grammar's right curly brace requirement.
>>
>> => (re-seq #"[^\"]+" "Harden }")
>> ("Harden }")
>>
>> A solution would be to make the regex for ITEM more restrictive.
>>
>> On Sun, Jun 12, 2016 at 12:52 PM, Hussein B. <hubag...@gmail.com> wrote:
>>
>>> Hello,
>>>
>>> I'm playing around Instaparse library, starting very simple.
>>>
>>> For input like :
>>>
>>> { player }
>>>
>>> I created the following parser:
>>>
>>> (def ast
>>> (ist/parser
>>> "TEST = OBJECT
>>> <WHITESPACE> = <#'\\s+'>
>>> <CURLY_OPEN> = <'{'>
>>> <CURLY_CLOSE> = <'}'>
>>> ITEM = #'[^\"]+'
>>> OBJECT = CURLY_OPEN WHITESPACE* ITEM WHITESPACE* CURLY_CLOSE"))
>>>
>>>
>>> In the REPL:
>>>
>>> user=> (ast "{ Harden } ")
>>>
>>> Parse error at line 1, column 12:
>>>
>>> { Harden }
>>>
>>> ^
>>>
>>> Expected one of:
>>>
>>> "}" (followed by end-of-string)
>>>
>>> #"\s+"
>>>
>>>
>>> Any ideas what I'm doing wrong?
>>>
>>> Thanks for help.
>>>
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>>
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