Module: BisonParser::Base

Included in:
BisonParser
Defined in:
lib/bison_parser/base.rb

Instance Method Summary collapse

Instance Method Details

#begin_token ⇒ Object 



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# File 'lib/bison_parser/base.rb', line 30

def begin_token
  self.token_row = row
  self.token_col = col
end

#error(msg, row, col) ⇒ Object

Raises:



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# File 'lib/bison_parser/base.rb', line 35

def error(msg, row, col)
  raise Error.new(msg, source, row, col)
end

#initialize(io) ⇒ Object 



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# File 'lib/bison_parser/base.rb', line 7

def initialize(io)
  if String === io
    io = ::File.open(io, 'r')
  end
  @source = io.respond_to?(:path) ? io.path : nil
  @io, @row, @col = io, 1, 0
end

#peak ⇒ Object 



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# File 'lib/bison_parser/base.rb', line 26

def peak
  io.read(1).tap{ |c| io.ungetc(c) if c }
end

#read ⇒ Object 



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# File 'lib/bison_parser/base.rb', line 15

def read
  io.read(1).tap do |c|
    if c == "\n"
      self.row += 1
      self.col = 0
    elsif c
      self.col += 1
    end
  end
end