Issue #13381 has been updated by byroot (Jean Boussier).


> Does anyone have other ideas? 

A common term for this in `intern` / `interning` / `interned`. However that terminology is already used for symbols (`rb_str_intern`).

This would look like:

```
rb_interned_str(VALUE)
rb_interned_str(const char *ptr, long len)
rb_interned_str_cstr(const char *ptr)
rb_enc_interned_str(const char *ptr, long len, rb_encoding *enc)
rb_enc_interned_str_cstr(const char *ptr, rb_encoding *enc)
```

----------------------------------------
Feature #13381: [PATCH] Expose rb_fstring and its family to C extensions
https://bugs.ruby-lang.org/issues/13381#change-86622

* Author: eagletmt (Kohei Suzuki)
* Status: Assigned
* Priority: Normal
----------------------------------------
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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