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|
module BindingOfCaller
module BindingExtensions
# Retrieve the binding of the nth caller of the current frame.
# @return [Binding]
def of_caller(n)
bt = Rubinius::VM.backtrace(1 + n, true).first
raise RuntimeError, "Invalid frame, gone beyond end of stack!" if bt.nil?
b = Binding.setup(
bt.variables,
bt.variables.method,
bt.constant_scope,
bt.variables.self,
bt
)
b.instance_variable_set :@frame_description,
bt.describe.gsub("{ } in", "block in")
b
end
# The description of the frame.
# @return [String]
def frame_description
@frame_description
end
# Return bindings for all caller frames.
# @return [Array<Binding>]
def callers
ary = []
n = 0
loop do
begin
ary << Binding.of_caller(n)
rescue
break
end
n += 1
end
ary.drop_while do |v|
!(v.frame_type == :method && v.eval("__method__") == :callers)
end.drop(1)
end
# Number of parent frames available at the point of call.
# @return [Fixnum]
def frame_count
callers.size - 1
end
# The type of the frame.
# @return [Symbol]
def frame_type
if compiled_code.for_module_body?
:class
elsif compiled_code.for_eval?
:eval
elsif compiled_code.is_block?
:block
else
:method
end
end
end
end
class ::Binding
include BindingOfCaller::BindingExtensions
extend BindingOfCaller::BindingExtensions
end
|
