From: Robert Klemme <bob.news@...>
Date: 2005-12-06T23:47:34+09:00
Subject: Re: How can I find __LINE__ on the execution stack ?

Christer Nilsson wrote:
> I would like to be able to display the line number in my simple
> assert. 
> 
> 1 def assert(expect, actual, *msg)
> 2  expect==actual ? print(".") : print("\nAssert at line #{__LINE__}
> failed: #{expect.inspect} <> #{actual.inspect} #{msg}\n")
> 3 end
> 4
> 5 assert 1, 2
> 6 assert 1, 1
> 
> The solution above erroneously displays line 2 instead of line 5.

You can use caller[0] to get the info you want:

irb(main):007:0> def test
irb(main):008:1>   p caller[0]
irb(main):009:1> end
=> nil
irb(main):010:0> test
"(irb):10:in `irb_binding'"
=> nil

Kind regards

    robert