Class: Object

Inherits:
BasicObject
Includes:
InstanceExecHelper
Defined in:
lib/cucumber/core_ext/instance_exec.rb

Defined Under Namespace

Modules: InstanceExecHelper

Instance Method Summary collapse

Instance Method Details

#cucumber_arity(block) ⇒ Object 



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# File 'lib/cucumber/core_ext/instance_exec.rb', line 27

def cucumber_arity(block)
  a = block.arity
  Cucumber::RUBY_1_9 ? a : (a == -1 ? 0 : a)
end

#cucumber_compatible_arity?(args, block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cucumber/core_ext/instance_exec.rb', line 32

def cucumber_compatible_arity?(args, block)
  ari = cucumber_arity(block)
  len = args.length
  return true if ari == len or ari < 0 && len >= ari.abs-1
  false
end

#cucumber_instance_exec(check_arity, pseudo_method, *args, &block) ⇒ Object 



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# File 'lib/cucumber/core_ext/instance_exec.rb', line 9

def cucumber_instance_exec(check_arity, pseudo_method, *args, &block)
  cucumber_run_with_backtrace_filtering(pseudo_method) do
    if check_arity && !cucumber_compatible_arity?(args, block)
      instance_exec do
        ari = cucumber_arity(block)
        ari = ari < 0 ? (ari.abs-1).to_s+"+" : ari
        s1 = ari == 1 ? "" : "s"
        s2 = args.length == 1 ? "" : "s"
        raise Cucumber::ArityMismatchError.new(
          "Your block takes #{ari} argument#{s1}, but the Regexp matched #{args.length} argument#{s2}."
        )
      end
    else
      instance_exec(*args, &block)
    end
  end
end

#cucumber_run_with_backtrace_filtering(pseudo_method) ⇒ Object 



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# File 'lib/cucumber/core_ext/instance_exec.rb', line 39

def cucumber_run_with_backtrace_filtering(pseudo_method)
  begin
    yield
  rescue Exception => e
    instance_exec_invocation_line = "#{__FILE__}:#{__LINE__ - 2}:in `cucumber_run_with_backtrace_filtering'"
    Exception.cucumber_strip_backtrace!((e.backtrace || []), instance_exec_invocation_line, pseudo_method)
    raise e
  end
end

#instance_exec(*args, &block) ⇒ Object 



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# File 'lib/cucumber/core_ext/instance_exec.rb', line 53

def instance_exec(*args, &block)
  begin
    old_critical, Thread.critical = Thread.critical, true
    n = 0
    n += 1 while respond_to?(mname="__instance_exec#{n}")
    InstanceExecHelper.module_eval{ define_method(mname, &block) }
  ensure
    Thread.critical = old_critical
  end
  begin
    ret = send(mname, *args)
  ensure
    InstanceExecHelper.module_eval{ remove_method(mname) } rescue nil
  end
  ret
end