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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/static/static-reference-to-fn-2.rs
parentInitial commit. (diff)
downloadrustc-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/static/static-reference-to-fn-2.rs')
-rw-r--r--src/test/ui/static/static-reference-to-fn-2.rs54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/test/ui/static/static-reference-to-fn-2.rs b/src/test/ui/static/static-reference-to-fn-2.rs
new file mode 100644
index 000000000..6693667c0
--- /dev/null
+++ b/src/test/ui/static/static-reference-to-fn-2.rs
@@ -0,0 +1,54 @@
+fn id<T>(x: T) -> T { x }
+
+struct StateMachineIter<'a> {
+ statefn: &'a StateMachineFunc<'a>
+}
+
+type StateMachineFunc<'a> = fn(&mut StateMachineIter<'a>) -> Option<&'static str>;
+
+impl<'a> Iterator for StateMachineIter<'a> {
+ type Item = &'static str;
+
+ fn next(&mut self) -> Option<&'static str> {
+ return (*self.statefn)(self);
+ }
+}
+
+fn state1(self_: &mut StateMachineIter) -> Option<&'static str> {
+ self_.statefn = &id(state2 as StateMachineFunc);
+ //~^ ERROR temporary value dropped while borrowed
+ return Some("state1");
+}
+
+fn state2(self_: &mut StateMachineIter) -> Option<(&'static str)> {
+ self_.statefn = &id(state3 as StateMachineFunc);
+ //~^ ERROR temporary value dropped while borrowed
+ return Some("state2");
+}
+
+fn state3(self_: &mut StateMachineIter) -> Option<(&'static str)> {
+ self_.statefn = &id(finished as StateMachineFunc);
+ //~^ ERROR temporary value dropped while borrowed
+ return Some("state3");
+}
+
+fn finished(_: &mut StateMachineIter) -> Option<(&'static str)> {
+ return None;
+}
+
+fn state_iter() -> StateMachineIter<'static> {
+ StateMachineIter {
+ //~^ ERROR cannot return value referencing temporary value
+ statefn: &id(state1 as StateMachineFunc)
+ }
+}
+
+
+fn main() {
+ let mut it = state_iter();
+ println!("{:?}",it.next());
+ println!("{:?}",it.next());
+ println!("{:?}",it.next());
+ println!("{:?}",it.next());
+ println!("{:?}",it.next());
+}