Class: Akaza::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/akaza/parser.rb

Constant Summary collapse

EOF = 
Class.new(StandardError)
SPACE = 
" "
TAB = 
"\t"
NL = 
"\n"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(code) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/akaza/parser.rb', line 13

def initialize(code)
  @io = StringIO.new(code)
end

Class Method Details

.parse(code) ⇒ Object 



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# File 'lib/akaza/parser.rb', line 9

def self.parse(code)
  self.new(code).parse
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/akaza/parser.rb', line 17

def parse
  commands = []

  loop do
    case c = nextc
    when SPACE
      commands << parse_stack
    when NL
      commands << parse_flow
    when TAB
      case nextc
      when SPACE
        commands << parse_calc
      when TAB
        commands << parse_heap
      when NL
        commands << parse_io
      end
    else
      raise "unreachable: #{c}"
    end
  rescue EOF
    return commands
  end
end