Class: Rutile::Lang

Inherits:
Object
  • Object
show all
Defined in:
lib/rutile/lang.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Lang

Returns a new instance of Lang.



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# File 'lib/rutile/lang.rb', line 6

def initialize
    @tokens = []
    @nfas = []
    @symbols = []
    @id = 0
    @nfa = nil
end

Instance Method Details

#add_file(file, back = false) ⇒ Object 



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# File 'lib/rutile/lang.rb', line 38

def add_file(file, back = false)
    if back
        @parser.file_stack.unshift file
    else
        @parser.inc_stack file
    end
end

#parse(files) ⇒ Object 



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# File 'lib/rutile/lang.rb', line 25

def parse(files)
    construct_nfa if @nfa.nil?
    @parser = Parser.new(@nfa, files)
    @parser.parse.each do |token|
        id     = token.type.min
        value  = @tokens[id].call(token.string)
        symbol = @symbols[id]
        if symbol != :ignore
            #feed it to the grammar thing
        end
    end
end

#run(files = ARGV) ⇒ Object 



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# File 'lib/rutile/lang.rb', line 46

def run(files = ARGV)
    if files.nil? || files == []
        files = [STDIN]
    end
    parse files
end

#tok(regex, symbol = :ignore, &block) ⇒ Object 



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# File 'lib/rutile/lang.rb', line 14

def tok(regex, symbol = :ignore, &block)
    if block.nil?
        block = Proc.new {|x|}
    end
    new_nfa = NFA::to_nfa(regex, @id)
    @symbols << symbol
    @nfas << new_nfa
    @tokens.append(block)
    @id += 1
end