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Report unexpected_cfgs lint in external macros

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This commit is contained in:
Urgau 2024-11-03 21:05:49 +01:00
parent c602e9aeaa
commit cc48194baf
4 changed files with 38 additions and 0 deletions
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1
compiler/rustc_lint_defs/src/builtin.rs
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@ -3185,6 +3185,7 @@ declare_lint! {
pub UNEXPECTED_CFGS,
Warn,
"detects unexpected names and values in `#[cfg]` conditions",
report_in_external_macro
}
declare_lint! {

11
tests/ui/check-cfg/auxiliary/cfg_macro.rs Normal file
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@ -0,0 +1,11 @@
// Inspired by https://github.com/rust-lang/cargo/issues/14775
pub fn my_lib_func() {}
#[macro_export]
macro_rules! my_lib_macro {
() => {
#[cfg(my_lib_cfg)]
$crate::my_lib_func()
};
}

12
tests/ui/check-cfg/report-in-external-macros.rs Normal file
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@ -0,0 +1,12 @@
// This test checks that we emit the `unexpected_cfgs` lint even in code
// coming from an external macro.
//@ check-pass
//@ no-auto-check-cfg
//@ aux-crate: cfg_macro=cfg_macro.rs
//@ compile-flags: --check-cfg=cfg()
fn main() {
cfg_macro::my_lib_macro!();
//~^ WARNING unexpected `cfg` condition name
}

14
tests/ui/check-cfg/report-in-external-macros.stderr Normal file
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@ -0,0 +1,14 @@
warning: unexpected `cfg` condition name: `my_lib_cfg`
--> $DIR/report-in-external-macros.rs:10:5
|
LL | cfg_macro::my_lib_macro!();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: expected names are: `clippy`, `debug_assertions`, `doc`, `doctest`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
= help: to expect this configuration use `--check-cfg=cfg(my_lib_cfg)`
= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
= note: `#[warn(unexpected_cfgs)]` on by default
= note: this warning originates in the macro `cfg_macro::my_lib_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
warning: 1 warning emitted