module Byebug::Helpers::FrameHelper
Utilities to assist frame navigation
Public Instance Methods
jump_frames(steps)
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# File lib/byebug/helpers/frame.rb, line 15 def jump_frames(steps) adjust_frame(navigate_to_frame(steps)) end
switch_to_frame(frame)
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# File lib/byebug/helpers/frame.rb, line 8 def switch_to_frame(frame) new_frame = index_from_start(frame) return frame_err("c_frame") if Frame.new(context, new_frame).c_frame? adjust_frame(new_frame) end
Private Instance Methods
adjust_frame(new_frame)
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# File lib/byebug/helpers/frame.rb, line 21 def adjust_frame(new_frame) return frame_err("too_low") if new_frame >= context.stack_size return frame_err("too_high") if new_frame.negative? context.frame = new_frame processor.prev_line = nil end
direction(step)
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@param step [Integer] A positive or negative integer
@return [Integer] +1 if step is positive / -1 if negative
# File lib/byebug/helpers/frame.rb, line 59 def direction(step) step / step.abs end
frame_err(msg)
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# File lib/byebug/helpers/frame.rb, line 50 def frame_err(msg) errmsg(pr("frame.errors.#{msg}")) end
index_from_start(index)
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Convert a possibly negative index to a positive index from the start of the callstack. -1 is the last position in the stack and so on.
@param i [Integer] Integer to be converted in a proper positive index.
# File lib/byebug/helpers/frame.rb, line 69 def index_from_start(index) index >= 0 ? index : context.stack_size + index end
out_of_bounds?(pos)
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# File lib/byebug/helpers/frame.rb, line 46 def out_of_bounds?(pos) !(0...context.stack_size).cover?(pos) end