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Name	Size	Permission	Date
cmd	[ DIR ]	drwxr-xr-x	2023-08-27 00:26
ext	[ DIR ]	drwxr-xr-x	2023-08-27 00:26
lc	[ DIR ]	drwxr-xr-x	2023-08-27 00:26
completion.rb	5.86 KB	-rw-r--r--	2012-01-27 15:53
context.rb	6.91 KB	-rw-r--r--	2010-03-30 09:03
extend-command.rb	7 KB	-rw-r--r--	2009-12-04 20:18
frame.rb	1.21 KB	-rw-r--r--	2009-10-02 08:04
help.rb	549 B	-rw-r--r--	2009-10-02 08:04
init.rb	6.96 KB	-rw-r--r--	2011-05-15 07:55
input-method.rb	2.5 KB	-rw-r--r--	2009-10-02 08:04
inspector.rb	2.19 KB	-rw-r--r--	2011-05-15 07:55
locale.rb	4.42 KB	-rw-r--r--	2011-05-15 07:55
magic-file.rb	893 B	-rw-r--r--	2012-12-11 03:47
notifier.rb	2.64 KB	-rw-r--r--	2010-03-19 23:30
output-method.rb	1.31 KB	-rw-r--r--	2010-03-19 23:30
ruby-lex.rb	22.12 KB	-rw-r--r--	2011-06-28 08:52
ruby-token.rb	7.27 KB	-rw-r--r--	2010-06-04 17:22
slex.rb	5.93 KB	-rw-r--r--	2010-07-11 12:59
src_encoding.rb	90 B	-rw-r--r--	2009-10-02 06:45
version.rb	241 B	-rw-r--r--	2009-10-02 08:04
workspace.rb	2.54 KB	-rw-r--r--	2011-06-27 11:10
ws-for-case-2.rb	195 B	-rw-r--r--	2010-11-08 15:59
xmp.rb	1.76 KB	-rw-r--r--	2010-03-19 23:30

Rename

#
#   frame.rb -
#   	$Release Version: 0.9$
#   	$Revision: 25189 $
#   	by Keiju ISHITSUKA(Nihon Rational Software Co.,Ltd)
#
# --
#
#
#

require "e2mmap"

module IRB
  class Frame
    extend Exception2MessageMapper
    def_exception :FrameOverflow, "frame overflow"
    def_exception :FrameUnderflow, "frame underflow"

INIT_STACK_TIMES = 3
    CALL_STACK_OFFSET = 3

def initialize
      @frames = [TOPLEVEL_BINDING] * INIT_STACK_TIMES
    end

def trace_func(event, file, line, id, binding)
      case event
      when 'call', 'class'
	@frames.push binding
      when 'return', 'end'
	@frames.pop
      end
    end

def top(n = 0)
      bind = @frames[-(n + CALL_STACK_OFFSET)]
      Fail FrameUnderflow unless bind
      bind
    end

def bottom(n = 0)
      bind = @frames[n]
      Fail FrameOverflow unless bind
      bind
    end

# singleton functions
    def Frame.bottom(n = 0)
      @backtrace.bottom(n)
    end

def Frame.top(n = 0)
      @backtrace.top(n)
    end

def Frame.sender
      eval "self", @backtrace.top
    end

@backtrace = Frame.new
    set_trace_func proc{|event, file, line, id, binding, klass|
      @backtrace.trace_func(event, file, line, id, binding)
    }
  end
end