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author | Jakub Kotur <qtr@google.com> | 2021-03-16 20:22:30 +0000 |
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committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-03-16 20:22:30 +0000 |
commit | 4c0b8e0ef78bcd80a4facc34c6a2158d83f96802 (patch) | |
tree | 13641ab7afc7aa43b586606c18d53084dedf7ace /src/compile_fail/must_use.rs | |
parent | a679e9b8b7e4ae27a19b81f216e375ea8a9cdb8e (diff) | |
parent | 7522a9ba008ac88224e0990932bdd298a43a2336 (diff) | |
download | rayon-4c0b8e0ef78bcd80a4facc34c6a2158d83f96802.tar.gz |
Initial import of rayon-1.5.0. am: 041839ceab am: d836dd6404 am: 7522a9ba00
Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rayon/+/1622436
Change-Id: I94b0e06d9da131d6f98db436ad1a178dfff2ec90
Diffstat (limited to 'src/compile_fail/must_use.rs')
-rw-r--r-- | src/compile_fail/must_use.rs | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/compile_fail/must_use.rs b/src/compile_fail/must_use.rs new file mode 100644 index 0000000..ac50a62 --- /dev/null +++ b/src/compile_fail/must_use.rs @@ -0,0 +1,67 @@ +// Check that we are flagged for ignoring `must_use` parallel adaptors. +// (unfortunately there's no error code for `unused_must_use`) + +macro_rules! must_use { + ($( $name:ident #[$expr:meta] )*) => {$( + /// First sanity check that the expression is OK. + /// + /// ``` + /// #![deny(unused_must_use)] + /// + /// use rayon::prelude::*; + /// + /// let v: Vec<_> = (0..100).map(Some).collect(); + /// let _ = + #[$expr] + /// ``` + /// + /// Now trigger the `must_use`. + /// + /// ```compile_fail + /// #![deny(unused_must_use)] + /// + /// use rayon::prelude::*; + /// + /// let v: Vec<_> = (0..100).map(Some).collect(); + #[$expr] + /// ``` + mod $name {} + )*} +} + +must_use! { + step_by /** v.par_iter().step_by(2); */ + chain /** v.par_iter().chain(&v); */ + chunks /** v.par_iter().chunks(2); */ + cloned /** v.par_iter().cloned(); */ + copied /** v.par_iter().copied(); */ + enumerate /** v.par_iter().enumerate(); */ + filter /** v.par_iter().filter(|_| true); */ + filter_map /** v.par_iter().filter_map(|x| *x); */ + flat_map /** v.par_iter().flat_map(|x| *x); */ + flat_map_iter /** v.par_iter().flat_map_iter(|x| *x); */ + flatten /** v.par_iter().flatten(); */ + flatten_iter /** v.par_iter().flatten_iter(); */ + fold /** v.par_iter().fold(|| 0, |x, _| x); */ + fold_with /** v.par_iter().fold_with(0, |x, _| x); */ + try_fold /** v.par_iter().try_fold(|| 0, |x, _| Some(x)); */ + try_fold_with /** v.par_iter().try_fold_with(0, |x, _| Some(x)); */ + inspect /** v.par_iter().inspect(|_| {}); */ + interleave /** v.par_iter().interleave(&v); */ + interleave_shortest /** v.par_iter().interleave_shortest(&v); */ + intersperse /** v.par_iter().intersperse(&None); */ + map /** v.par_iter().map(|x| x); */ + map_with /** v.par_iter().map_with(0, |_, x| x); */ + map_init /** v.par_iter().map_init(|| 0, |_, x| x); */ + panic_fuse /** v.par_iter().panic_fuse(); */ + positions /** v.par_iter().positions(|_| true); */ + rev /** v.par_iter().rev(); */ + skip /** v.par_iter().skip(1); */ + take /** v.par_iter().take(1); */ + update /** v.par_iter().update(|_| {}); */ + while_some /** v.par_iter().cloned().while_some(); */ + with_max_len /** v.par_iter().with_max_len(1); */ + with_min_len /** v.par_iter().with_min_len(1); */ + zip /** v.par_iter().zip(&v); */ + zip_eq /** v.par_iter().zip_eq(&v); */ +} |