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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/proc-macro/cfg-eval.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/proc-macro/cfg-eval.rs')
-rw-r--r-- | src/test/ui/proc-macro/cfg-eval.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/cfg-eval.rs b/src/test/ui/proc-macro/cfg-eval.rs new file mode 100644 index 000000000..fa6d015e4 --- /dev/null +++ b/src/test/ui/proc-macro/cfg-eval.rs @@ -0,0 +1,37 @@ +// check-pass +// compile-flags: -Z span-debug +// aux-build:test-macros.rs + +#![feature(cfg_eval)] +#![feature(proc_macro_hygiene)] +#![feature(stmt_expr_attributes)] +#![feature(rustc_attrs)] +#![no_std] // Don't load unnecessary hygiene information from std +extern crate std; + +#[macro_use] +extern crate test_macros; + +#[cfg_eval] +#[print_attr] +struct S1 { + #[cfg(FALSE)] + field_false: u8, + #[cfg(all(/*true*/))] + #[cfg_attr(FALSE, unknown_attr)] + #[cfg_attr(all(/*true*/), allow())] + field_true: u8, +} + +#[cfg_eval] +#[cfg(FALSE)] +struct S2 {} + +fn main() { + // Subtle - we need a trailing comma after the '1' - otherwise, `#[cfg_eval]` will + // turn this into `(#[cfg(all())] 1)`, which is a parenthesized expression, not a tuple + // expression. `#[cfg]` is not supported inside parenthesized expressions, so this will + // produce an error when attribute collection runs. + let _ = #[cfg_eval] #[print_attr] #[cfg_attr(not(FALSE), rustc_dummy)] + (#[cfg(FALSE)] 0, #[cfg(all(/*true*/))] 1,); +} |