[ruby-core:45253] [RFC] RubyVM::FrameInfo.caller method

Hi,

I added a class RubyVM::FrameInfo.caller and methods of it.  The
following text is quoted from ChangeLog.

> 	* vm.c (RubyVM::FrameInfo): add a class to access each frame
> 	  information.  You don't need to parse strings from caller().
> 	  FrameInfo has the following methods:
> 	    FrameInfo#name: method name, class name, etc with decorations.
> 	    FrameInfo#basename: name without decorations.
> 	    FrameInfo#line_no: line number.
> 	    FrameInfo#filename: file name.
> 	    FrameInfo#filepath: full filepath.
> 	    FrameInfo#iseq: iseq if it is iseq frame (defined by ruby script)
> 	    FrameInfo#to_s: return caller() method style string.
> 	  RubyVM::FrameInfo.caller(n, lev) returns array of FrameInfo objects.
> 	  The name "RubyVM::FrameInfo.caller" is long and ambiguous (it is
> 	  confusing with Kernel::caller() method), we need to change the name
> 	  before Ruby 2.0 release. Good names or comments are welcome.


I think it is strange a bit that the singleton method of the FrameInfo
class returns a collection (array) of FrameInfo objects.  And the name
`caller()' is confusing with Kernel.caller().

Any good name?
Or any comment of this new feature?


BTW, I added second argument of Kernel::caller().  You can specify
required array size with it.  For example, caller(0, 1) returns only 1
frame (the current frame which calls caller() method) information string.

# ... and performance is also improved.

-- 
// SASADA Koichi at atdot dot net