javascript - PEG Parser generator how to fix Expected "whitespace" but " " found -


i have readable stream of text input (including unicode characters html) trying extract information specifying structure in peg.js , returning custom json objects matched items.

i have text input in following format - 

1. input [tags] (a) text (b) text ans. (b)   2. input [tags] (a) text (b) text ans. (b)

so after searching available node.js lexical parsers out there found peg , tried sample script in online version - 

start     = demo _ "whitespace"   = [ \t\n\r]* demo     = digits:[0-9]+."whitespace" "literal"+  integer "integer"   = _ [0-9]+ { return parseint(text(), 10); }

but getting error - 

"line 1, column 3: expected "whitespace" " " found."

so, how can include whitespaces in expression or, there better ways / libraries accomplish node.js

you using "whitespace" should using _.

you can think of "whitespace" comment explains _ supposed mean.

peg.js should work fine in case, long input data formed.


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