why the sexp has array in the end

Posted by dorelal on Stack Overflow See other posts from Stack Overflow or by dorelal
Published on 2010-05-30T20:07:55Z Indexed on 2010/05/30 20:12 UTC
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ruby

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parser

RubyParser.new.parse "1+1" 
s(:call, s(:lit, 1), :+, s(:array, s(:lit, 1)))

Above code is from this link

Why there is array after + in the Sexp. I am just trying to learn ruby parser and the whole AST thing. I have been programming for a while but have no formal education in computer science. So do point to good article which explains AST etc. Please no dragon book. I tried couple of times but couldn't understand much of that book

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