Feature #9400: Respect constant lookup when using `raise`

• Status: Open
• Assignee: -
• Target version: -

[wardrop (Tom Wardrop)]

When raising an error without defining an exception class, ::RuntimeError appears to be a hard-coded default. I propose that this be changed so proper constant lookup rules are respected when looking up RuntimeError. For example, I would expect both of the raise calls in this example to be identical and use the redefined RuntimeError class with the hello method:

module Test
  class RuntimeError < RuntimeError
    def hello
      puts 'Hi there!'
    end
  end

  begin
    raise RuntimeError
  rescue => e
    e.hello #=> Hi there!
  end

  begin
    raise
  rescue => e
    e.hello #=> undefined method `hello' for RuntimeError:RuntimeError
  end
end

I would find this behavior to be of quite some convenience. A lot (most?) libraries only have a single error class, and this would allow developers to implicitly raise exceptions of the appropriate class.

Thoughts?

[jeremyevans0 (Jeremy Evans)]

• Tracker changed from Bug to Feature
• ruby -v deleted (2.1.0)
• Backport deleted (1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN)