[ruby-core:78597] [Ruby trunk Feature#13025][Feedback] String equality operator does not perform implicit conversion

Issue #13025 has been updated by Nobuyoshi Nakada.

Tracker changed from Bug to Feature
Description updated
Status changed from Open to Feedback

What documentation do you refer?
The document of 2.3 says:

> If `obj` is not an instance of String but responds to `to_str`, then the
> two strings are compared using case equality `Object#===`.

(the method to be called is wrong, though)

Do you suggest changing the fallback method?

----------------------------------------
Feature #13025: String equality operator does not perform implicit conversion
https://bugs.ruby-lang.org/issues/13025#change-61981

* Author: John Carney
* Status: Feedback
* Priority: Normal
* Assignee: 
----------------------------------------
According to the documentation, String#== should perform implicit conversion of non-strings, but this is not happening.

~~~ruby
class SomeClass
  def initialize(value)
    @value = value
  end

  def to_str
    @value.to_s
  end
end

"text" == SomeClass.new("text")
# => false (expected true)
~~~

Other operators work as expected:

~~~ruby
"text" + SomeClass.new("text")
# => "texttext"

"text" <=> SomeClass.new("text")
# => 0
~~~



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