[ruby-core:99492] [Ruby master Feature#17104] Do not freeze interpolated strings when using frozen-string-literal
From:
merch-redmine@...
Date:
2020-08-05 21:26:55 UTC
List:
ruby-core #99492
Issue #17104 has been updated by jeremyevans0 (Jeremy Evans).
Status changed from Closed to Open
Subject changed from Why are interpolated string literals frozen? to Do not freeze interpolated strings when using frozen-string-literal
Tracker changed from Misc to Feature
We can treat this as a feature request. I changed it from Misc to Feature and modified the Subject to be the feature you are requesting as opposed to a question. The issue for the next developer meeting is at https://bugs.ruby-lang.org/issues/17041 if you want to add it to the agenda.
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Feature #17104: Do not freeze interpolated strings when using frozen-string-literal
https://bugs.ruby-lang.org/issues/17104#change-86948
* Author: bughit (bug hit)
* Status: Open
* Priority: Normal
----------------------------------------
```rb
#frozen_string_literal: true
def foo(str)
"#{str}"
end
fr1 = 'a'
fr2 = 'a'
fr1_1 = foo(fr1)
fr2_1 = foo(fr2)
puts fr1.__id__, fr2.__id__, fr1_1.__id__, fr2_1.__id__
puts fr1_1 << 'b'
```
Isn't the point of frozen literals to avoid needless allocations? But interpolated strings are allocated each time, so freezing appears pointless.
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