Guillaume Gomez 0377330be4 Rollup merge of #142704 - tgross35:remove-concat_idents, r=fee1-dead ... Remove the deprecated unstable `concat_idents!` macro In [rust-lang/rust#137653], the lang and libs-API teams did a joint FCP to deprecate and eventually remove the long-unstable `concat_idents!` macro. The deprecation is landing in 1.88, so do the removal here (target version 1.90). This macro has been superseded by the more recent `${concat(...)}` metavariable expression language feature, which avoids some of the limitations of `concat_idents!`. The metavar expression is unstably available under the [`macro_metavar_expr_concat`] feature. History is mildly interesting here: `concat_idents!` goes back to 2011 when it was introduced with 513276e595 ("Add #concat_idents[] and #ident_to_str[]"). The syntax looks a bit different but it still works about the same: let asdf_fdsa = "<.<"; assert(#concat_idents[asd,f_f,dsa] == "<.<"); assert(#ident_to_str[use_mention_distinction] == "use_mention_distinction"); (That test existed from introduction until its removal here.) Closes: https://github.com/rust-lang/rust/issues/29599 [rust-lang/rust#137653]: https://github.com/rust-lang/rust/pull/137653 [`macro_metavar_expr_concat`]: https://github.com/rust-lang/rust/issues/124225		2025-06-24 15:39:38 +02:00
..
accepted.rs	stabilize gai	2025-06-11 15:30:15 +01:00
builtin_attrs.rs	Port #[rustc_skip_during_method_dispatch] to the new attribute system	2025-06-23 22:48:20 +03:00
lib.rs	Remove rustc_feature::Stability	2025-06-09 11:44:52 +02:00
removed.rs	Remove the deprecated concat_idents! macro	2025-06-24 11:07:16 +00:00
tests.rs	rustc_feature: Avoid unsafe std::env::set_var() in UnstableFeatures tests	2025-01-08 11:37:19 +01:00
unstable.rs	correct template for #[align]	2025-06-19 13:58:23 +02:00