Class: Lexer

Inherits:
StringScanner
  • Object
show all
Defined in:
lib/lol/lexer.rb

Constant Summary collapse

KEYWORDS = 
["SMALR THAN", "BIGR THAN", "NOT SMALR THAN", "NOT BIGR THAN",
"LIEK", "NOT LIEK", "IZ", "NOWAI", "YARLY", "VISIBLE",
"KTHXBYE", "BYES", "DIAF", "GTFO", "HAI", "CAN HAS STDIO",
"IM IN YR LOOP", "KTHX", "UPZ", "NERFZ", "TIEMZD", "OVARZ",
"I HAS A", "ITZ", "UP", "NERF", "TIEMZ", "OVAR", "LOL", "R",
"LINE", "WORD", "LETTAR", "GIMMEH", "OUTTA"]

Instance Method Summary collapse

Instance Method Details

#next_token ⇒ Object 



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# File 'lib/lol/lexer.rb', line 11

def next_token
  until eos? do
    case
    when scan(/BTW /)
      skip_until(/\n/)
    when scan(/\d+/)
      return [:NUMBAR, matched.to_i]
    when scan(/"[^"]*"/)
      return [:YARN, matched[1..-2]]
    when scan(Regexp.new(KEYWORDS.join("|")))
      return [matched.gsub(/ /, "_").to_sym, nil]
    when scan(/[A-Z]+/)
      return [:VARIABLE, matched]
    when scan(/\?|\!/)
      return [matched, nil]
    when scan(/\n+/)
      return [:EOS, nil]
    else
      getch
    end
  end
  [false, false]
end