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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 /compiler/rustc_error_codes/src/error_codes/E0730.md | |
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 'compiler/rustc_error_codes/src/error_codes/E0730.md')
-rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0730.md | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0730.md b/compiler/rustc_error_codes/src/error_codes/E0730.md new file mode 100644 index 000000000..56d0e6afa --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0730.md @@ -0,0 +1,39 @@ +An array without a fixed length was pattern-matched. + +Erroneous code example: + +```compile_fail,E0730 +fn is_123<const N: usize>(x: [u32; N]) -> bool { + match x { + [1, 2, ..] => true, // error: cannot pattern-match on an + // array without a fixed length + _ => false + } +} +``` + +To fix this error, you have two solutions: + 1. Use an array with a fixed length. + 2. Use a slice. + +Example with an array with a fixed length: + +``` +fn is_123(x: [u32; 3]) -> bool { // We use an array with a fixed size + match x { + [1, 2, ..] => true, // ok! + _ => false + } +} +``` + +Example with a slice: + +``` +fn is_123(x: &[u32]) -> bool { // We use a slice + match x { + [1, 2, ..] => true, // ok! + _ => false + } +} +``` |