[ruby-core:99802] [Ruby master Feature#17104] Do not freeze interpolated strings when using frozen-string-literal
From:
eregontp@...
Date:
2020-08-31 19:28:05 UTC
List:
ruby-core #99802
Issue #17104 has been updated by Eregon (Benoit Daloze).
Assignee set to Eregon (Benoit Daloze)
I'll try to make a PR for this change.
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Feature #17104: Do not freeze interpolated strings when using frozen-string-literal
https://bugs.ruby-lang.org/issues/17104#change-87322
* Author: bughit (bug hit)
* Status: Open
* Priority: Normal
* Assignee: Eregon (Benoit Daloze)
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I think the point of frozen string literals is to avoid needless allocations. Interpolated strings are allocated each time, so freezing them appears pointless.
```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'
```
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