Method definitions and Line numbers

ruby-talk
1

Hello,

How does Ruby store where methods are defined?
For example, where does Ruby look to get file names and line numbers in the
stack trace?

···

--
Thank you,
Brian Takita
http://weblog.freeopinion.org

2

Check out the __FILE__ and __LINE__ constants.

···

On Jan 20, 2006, at 7:37 PM, Brian Takita wrote:

Hello,

How does Ruby store where methods are defined?
For example, where does Ruby look to get file names and line numbers in the
stack trace?

--
Thank you,
Brian Takita
http://weblog.freeopinion.org

3

Check out the __FILE__ and __LINE__ constants.

I apologize for not being clear.

Lets say we have a class Test that raises an error.

class Test
    def method_with_an_error
        raise Error
    end
end

t = Test.new
t.method_with_an_error

Now the following error message is outputted in the command line.

/home/btakita/src/scratch3.rb:3:in `method_with_an_error': Exception
(Exception)
    from /home/btakita/src/scratch3.rb:8

How does Ruby keep track where :method_with_an_error is stored?
Can I make a query as to where :method_with_an_error is defined?

···

--
Thank you,
Brian Takita
http://weblog.freeopinion.org

4

I meant to paste this code:

class Test
    def method_with_an_error
        raise Exception
    end
end

t = Test.new
t.method_with_an_error

5

You mean without it raising an excepption? AFAIK there is no other
way than searching sources for the definition. You can also use $: to
check directories in the load path.

Wait, there might be one other option: use set_trace_func at the
beginning of your script (before the first require) and record all
class and method definitions.

Kind regards

robert

···

2006/1/21, Brian Takita <brian.takita@gmail.com>:

>
> Check out the __FILE__ and __LINE__ constants.

I apologize for not being clear.

Lets say we have a class Test that raises an error.

class Test
    def method_with_an_error
        raise Error
    end
end

t = Test.new
t.method_with_an_error

Now the following error message is outputted in the command line.

/home/btakita/src/scratch3.rb:3:in `method_with_an_error': Exception
(Exception)
    from /home/btakita/src/scratch3.rb:8

How does Ruby keep track where :method_with_an_error is stored?
Can I make a query as to where :method_with_an_error is defined?

--
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