class IRB::Frame
Constants
- CALL_STACK_OFFSET
-
Default number of frames offset
- INIT_STACK_TIMES
-
Default number of stack frames
Public Class Methods
Source
# File lib/irb/frame.rb, line 61 def Frame.bottom(n = 0) @backtrace.bottom(n) end
Convenience method for Frame#bottom
Source
# File lib/irb/frame.rb, line 26 def initialize @frames = [TOPLEVEL_BINDING] * INIT_STACK_TIMES end
Creates a new stack frame
Source
# File lib/irb/frame.rb, line 71 def Frame.sender eval "self", @backtrace.top end
Returns the binding context of the caller from the last frame initialized
Source
# File lib/irb/frame.rb, line 66 def Frame.top(n = 0) @backtrace.top(n) end
Convenience method for Frame#top
Public Instance Methods
Source
# File lib/irb/frame.rb, line 54 def bottom(n = 0) bind = @frames[n] fail FrameOverflow unless bind bind end
Returns the n
number of frames on the call stack from the first frame initialized.
Raises FrameOverflow
if there are no frames in the given stack range.
Source
# File lib/irb/frame.rb, line 44 def top(n = 0) bind = @frames[-(n + CALL_STACK_OFFSET)] fail FrameUnderflow unless bind bind end
Returns the n
number of frames on the call stack from the last frame initialized.
Raises FrameUnderflow
if there are no frames in the given stack range.
Source
# File lib/irb/frame.rb, line 31 def trace_func(event, file, line, id, binding) case event when 'call', 'class' @frames.push binding when 'return', 'end' @frames.pop end end
Used by Kernel#set_trace_func
to register each event in the call stack