5:     def initialize( message, source=nil, parser=nil, exception=nil )
 6:       super(message)
 7:       @source = source
 8:       @parser = parser
 9:       @continued_exception = exception
10:     end

47:     def context
48:       @source.current_line
49:     end

42:     def line
43:       @source.current_line[2] if @source and defined? @source.current_line and 
44:       @source.current_line
45:     end

37:     def position
38:       @source.current_line[0] if @source and defined? @source.current_line and
39:       @source.current_line
40:     end

12:     def to_s
13:       # Quote the original exception, if there was one
14:       if @continued_exception
15:         err = @continued_exception.inspect
16:         err << "\n"
17:         err << @continued_exception.backtrace.join("\n")
18:         err << "\n...\n"
19:       else
20:         err = ""
21:       end
22: 
23:       # Get the stack trace and error message
24:       err << super
25: 
26:       # Add contextual information
27:       if @source
28:         err << "\nLine: #{line}\n"
29:         err << "Position: #{position}\n"
30:         err << "Last 80 unconsumed characters:\n"
31:         err << @source.buffer[0..80].gsub(/\n/, ' ')
32:       end
33:       
34:       err
35:     end