Hi Everybody,
https://gist.github.com/cced1cf377ed49005704 *instaparse_question.clj*
<https://gist.github.com/anonymous/cced1cf377ed49005704#file-instaparse_question-clj>
Raw
<https://gist.github.com/anonymous/cced1cf377ed49005704/raw/220ff32218839db388261fd8e2489288a0093606/instaparse_question.clj>
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(ns lua-map-parser.instaparse-question
(:require [instaparse.core :as insta]))
(let [parser (insta/parser
" lua-file = {map-decl|return-statement}
map-decl = <'local'> identifier <'='> <'{'> {
map-entry} <'}'> ;
identifier = #'[a-zA-Z\\_][0-9a-zA-Z\\-\\_]*' ;
map-entry = <'['> (string|number) <']'> <'='>
(string|number) ;
string = <'\\\"'> #'([^\"\\\\]|\\\\.)*' <'\\\"'> ;
number = integer | decimal ;
<decimal> = #'-?[0-9]+\\.[0-9]+' ;
<integer> = #'-?[0-9]+' ;
<return-statement> = <'return'> <identifier>"
:auto-whitespace :comma)]
(defn lua-map-parser [str]
(parser str)))
(lua-map-parser "local CTRData = {
[1]=2 ,
[\"3\"]=4 }
local MYData = { [\"hello\"] = \"world\"
[\"sunil\"] = 1 [\"satish\"] = \"office\"
[\"dad\"]=\"home\" }
return CTRData
")
The above grammar simply parses a map in lua-syntax. It works for the above
case. However, when I try to use it on a file that is about 1 MB in size,
it fails(not sure didn't wait longer than 2 minutes). I would love to hear
if there is something that is grossly inefficient in the way I have
represented my grammar. The lua interpreter loads the file in no time (well
0.06 sec) . I would love any feedback on improving the grammar. Thanks
Sunil.
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