Issue #13381 has been updated by nobu (Nobuyoshi Nakada).

Assignee deleted (ko1 (Koichi Sasada))

How about `fixed_str`?

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Feature #13381: [PATCH] Expose rb_fstring and its family to C extensions
https://bugs.ruby-lang.org/issues/13381#change-65394

* Author: eagletmt (Kohei Suzuki)
* Status: Assigned
* Priority: Normal
* Assignee: 
* Target version: 
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https://github.com/ruby/ruby/pull/1559

Currently, C extensions cannot use fstrings. I'd like to use
`rb_fstring_cstr` instead of `rb_str_new_cstr` for static strings in C
extensions to avoid excess allocation.

I think there's several use cases.

- https://github.com/k0kubun/hamlit/blob/v2.8.0/ext/hamlit/hamlit.c#L508-L512
- https://bitbucket.org/ged/ruby-pg/src/e5eb92cca97abc0c6fc168acfad993c2ad314589/ext/pg_connection.c?at=v0.20.0&fileviewer=file-view-default#pg_connection.c-3679
- https://bitbucket.org/ged/ruby-pg/src/e5eb92cca97abc0c6fc168acfad993c2ad314589/ext/pg_copy_coder.c?at=v0.20.0&fileviewer=file-view-default#pg_copy_coder.c-38



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