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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/pattern/usefulness/match-vec-unreachable.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/pattern/usefulness/match-vec-unreachable.rs b/src/test/ui/pattern/usefulness/match-vec-unreachable.rs new file mode 100644 index 000000000..3342389be --- /dev/null +++ b/src/test/ui/pattern/usefulness/match-vec-unreachable.rs @@ -0,0 +1,29 @@ +#![deny(unreachable_patterns)] + +fn main() { + let x: Vec<(isize, isize)> = Vec::new(); + let x: &[(isize, isize)] = &x; + match *x { + [a, (2, 3), _] => (), + [(1, 2), (2, 3), b] => (), //~ ERROR unreachable pattern + _ => () + } + + let x: Vec<String> = vec!["foo".to_string(), + "bar".to_string(), + "baz".to_string()]; + let x: &[String] = &x; + match *x { + [ref a, _, _, ..] => { println!("{}", a); } + [_, _, _, _, _] => { } //~ ERROR unreachable pattern + _ => { } + } + + let x: Vec<char> = vec!['a', 'b', 'c']; + let x: &[char] = &x; + match *x { + ['a', 'b', 'c', ref _tail @ ..] => {} + ['a', 'b', 'c'] => {} //~ ERROR unreachable pattern + _ => {} + } +} |