Method: ANTLR3::FileStream#initialize

Defined in:
lib/antlr3/streams.rb

#initialize(file, options = {}) ⇒ FileStream

creates a new FileStream object using the given file object. If file is a path string, the file will be read and the contents will be used and the name attribute will be set to the path. If file is an IO-like object (that responds to :read), the content of the object will be used and the stream will attempt to set its name object first trying the method #name on the object, then trying the method #path on the object.

see StringStream.new for a list of additional options the constructer accepts



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# File 'lib/antlr3/streams.rb', line 689

def initialize( file, options = {} )
  case file
  when $stdin then
    data = $stdin.read
    @name = '(stdin)'
  when ARGF
    data = file.read
    @name = file.path
  when ::File then
    file = file.clone
    file.reopen( file.path, 'r' )
    @name = file.path
    data = file.read
    file.close
  else
    if file.respond_to?( :read )
      data = file.read
      if file.respond_to?( :name ) then @name = file.name
      elsif file.respond_to?( :path ) then @name = file.path
      end
    else
      @name = file.to_s
      if test( ?f, @name ) then data = File.read( @name )
      else raise ArgumentError, "could not find an existing file at %p" % @name
      end
    end
  end
  super( data, options )
end