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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/traits/generic.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/traits/generic.rs')
-rw-r--r-- | src/test/ui/traits/generic.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/traits/generic.rs b/src/test/ui/traits/generic.rs new file mode 100644 index 000000000..80efe1c93 --- /dev/null +++ b/src/test/ui/traits/generic.rs @@ -0,0 +1,45 @@ +// run-pass +#![allow(non_camel_case_types)] + + + +trait to_str { + fn to_string_(&self) -> String; +} +impl to_str for isize { + fn to_string_(&self) -> String { self.to_string() } +} +impl to_str for String { + fn to_string_(&self) -> String { self.clone() } +} +impl to_str for () { + fn to_string_(&self) -> String { "()".to_string() } +} + +trait map<T> { + fn map<U, F>(&self, f: F) -> Vec<U> where F: FnMut(&T) -> U; +} +impl<T> map<T> for Vec<T> { + fn map<U, F>(&self, mut f: F) -> Vec<U> where F: FnMut(&T) -> U { + let mut r = Vec::new(); + for i in self { + r.push(f(i)); + } + r + } +} + +fn foo<U, T: map<U>>(x: T) -> Vec<String> { + x.map(|_e| "hi".to_string() ) +} +fn bar<U:to_str,T:map<U>>(x: T) -> Vec<String> { + x.map(|_e| _e.to_string_() ) +} + +pub fn main() { + assert_eq!(foo(vec![1]), ["hi".to_string()]); + assert_eq!(bar::<isize, Vec<isize> >(vec![4, 5]), ["4".to_string(), "5".to_string()]); + assert_eq!(bar::<String, Vec<String> >(vec!["x".to_string(), "y".to_string()]), + ["x".to_string(), "y".to_string()]); + assert_eq!(bar::<(), Vec<()>>(vec![()]), ["()".to_string()]); +} |