Incorrect completion suggestions

[ashmaroli]

Description

Expected to get valid suggestions based on referenced object.

Sample Code:

Lorem = Class.new

module Foo
  def lipsum
    @lipsum ||= Lorem.new
  end
end

require 'irb'
require 'irb/completion'

puts "Initializing with IRB #{IRB::VERSION}..\n\n"

IRB.setup(nil)
IRB::Irb.new.tap do |irb|
  irb.context.main.extend(Foo)
end.run

Actual Result

Note that even though lipsum references an instance of an Lorem which is simply a base class, the completion suggestion displays
methods not defined in Lorem or any of the ancestors of Lorem.

Result of irb_info

irb(main):001:0> irb_info
=>
Ruby version: 2.7.5
IRB version: irb 1.4.1 (2021-12-25)
InputMethod: ReidlineInputMethod with Reline 0.3.1
.irbrc path: C:/Users/[USERNAME]/.irbrc
RUBY_PLATFORM: x64-mingw32
East Asian Ambiguous Width: 3
Code page: 437

Terminal Emulator

cmd.exe on Windows

Setting Files

Using just ~/.irbrc.

[aycabta]

Due to side effects, completion of method call results is not possible at the moment. Please see the corresponding implementation.

[ashmaroli]

Please see the corresponding implementation.

@aycabta Thank you for responding. Could you also point me to the test coverage for those set of lines?
(Just curious about deducing the rationale and expectations around the particular case).

[tompng]

Implementing completion for the provided sample code is extremely difficult because it needs one of these to determine the return value of method ipsum.

• Perform static code analyze for every code evaluated inside IRB
• Analyze RubyVM::InstructionSequence.of(method(:ipsum))

Closing as not planned.
However, the new type-completor (#734) will provide better completion for some cases.