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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/functions-closures/closure-reform.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/functions-closures/closure-reform.rs')
-rw-r--r-- | src/test/ui/functions-closures/closure-reform.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/test/ui/functions-closures/closure-reform.rs b/src/test/ui/functions-closures/closure-reform.rs new file mode 100644 index 000000000..0bb6159ff --- /dev/null +++ b/src/test/ui/functions-closures/closure-reform.rs @@ -0,0 +1,56 @@ +// run-pass +#![allow(unused_variables)] +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/publicdomain/zero/1.0/ */ + +fn call_it<F>(f: F) + where F : FnOnce(String) -> String +{ + println!("{}", f("Fred".to_string())) +} + +fn call_a_thunk<F>(f: F) where F: FnOnce() { + f(); +} + +fn call_this<F>(f: F) where F: FnOnce(&str) + Send { + f("Hello!"); +} + +fn call_bare(f: fn(&str)) { + f("Hello world!") +} + +fn call_bare_again(f: extern "Rust" fn(&str)) { + f("Goodbye world!") +} + +pub fn main() { + // Procs + + let greeting = "Hello ".to_string(); + call_it(|s| { + format!("{}{}", greeting, s) + }); + + let greeting = "Goodbye ".to_string(); + call_it(|s| format!("{}{}", greeting, s)); + + let greeting = "How's life, ".to_string(); + call_it(|s: String| -> String { + format!("{}{}", greeting, s) + }); + + // Closures + + call_a_thunk(|| println!("Hello world!")); + + call_this(|s| println!("{}", s)); + + // External functions + + fn foo(s: &str) {} + call_bare(foo); + + call_bare_again(foo); +} |