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| author | Trevor Gross <tmgross@umich.edu> | 2025-06-19 06:12:28 +0000 |
|---|---|---|
| committer | Trevor Gross <tmgross@umich.edu> | 2025-06-24 11:07:16 +0000 |
| commit | 0e4de4ceb0086b7befab6736e45ac3efbc560cea (patch) | |
| tree | c8a821b0095be52479016b0827422d6462048a03 /compiler/rustc_builtin_macros/src/lib.rs | |
| parent | c978c8986f700bc8fa83b5f98cc96f41772fa281 (diff) | |
| download | rust-0e4de4ceb0086b7befab6736e45ac3efbc560cea.tar.gz rust-0e4de4ceb0086b7befab6736e45ac3efbc560cea.zip | |
Remove the deprecated `concat_idents!` macro
In [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This macro has been superseded by the more recent `${concat(...)}`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 513276e595f8 ("Add #concat_idents[] and
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://www.github.com/rust-lang/rust/issues/29599
[137653]: https://www.github.com/rust-lang/rust/pull/137653
[`macro_metavar_expr_concat`]: https://www.github.com/rust-lang/rust/issues/124225
Diffstat (limited to 'compiler/rustc_builtin_macros/src/lib.rs')
| -rw-r--r-- | compiler/rustc_builtin_macros/src/lib.rs | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/compiler/rustc_builtin_macros/src/lib.rs b/compiler/rustc_builtin_macros/src/lib.rs index 9e7d0ec9e81..9b6dea21438 100644 --- a/compiler/rustc_builtin_macros/src/lib.rs +++ b/compiler/rustc_builtin_macros/src/lib.rs @@ -36,7 +36,6 @@ mod cfg_eval; mod compile_error; mod concat; mod concat_bytes; -mod concat_idents; mod define_opaque; mod derive; mod deriving; @@ -84,7 +83,6 @@ pub fn register_builtin_macros(resolver: &mut dyn ResolverExpand) { compile_error: compile_error::expand_compile_error, concat: concat::expand_concat, concat_bytes: concat_bytes::expand_concat_bytes, - concat_idents: concat_idents::expand_concat_idents, const_format_args: format::expand_format_args, core_panic: edition_panic::expand_panic, env: env::expand_env, |