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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/macros/macro-tt-followed-by-seq.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/macros/macro-tt-followed-by-seq.rs')
-rw-r--r-- | src/test/ui/macros/macro-tt-followed-by-seq.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/macros/macro-tt-followed-by-seq.rs b/src/test/ui/macros/macro-tt-followed-by-seq.rs new file mode 100644 index 000000000..080dbcfdd --- /dev/null +++ b/src/test/ui/macros/macro-tt-followed-by-seq.rs @@ -0,0 +1,28 @@ +// run-pass +// Regression test for issue #25436: permit token-trees to be followed +// by sequences, enabling more general parsing. + +use self::Join::*; + +#[derive(Debug)] +#[allow(unused_tuple_struct_fields)] +enum Join<A,B> { + Keep(A,B), + Skip(A,B), +} + +macro_rules! parse_list { + ( < $a:expr; > $($b:tt)* ) => { Keep(parse_item!($a),parse_list!($($b)*)) }; + ( $a:tt $($b:tt)* ) => { Skip(parse_item!($a), parse_list!($($b)*)) }; + ( ) => { () }; +} + +macro_rules! parse_item { + ( $x:expr ) => { $x } +} + +fn main() { + let list = parse_list!(<1;> 2 <3;> 4); + assert_eq!("Keep(1, Skip(2, Keep(3, Skip(4, ()))))", + format!("{:?}", list)); +} |