Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 97 insertions, 0 deletions

diff --git a/src/test/ui/borrowck/borrowck-overloaded-index-autoderef.rs b/src/test/ui/borrowck/borrowck-overloaded-index-autoderef.rs
new file mode 100644
index 000000000..3d3a3afd3
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-overloaded-index-autoderef.rs
@@ -0,0 +1,97 @@
+// Test that we still see borrowck errors of various kinds when using
+// indexing and autoderef in combination.
+
+use std::ops::{Index, IndexMut};
+
+
+
+struct Foo {
+    x: isize,
+    y: isize,
+}
+
+impl<'a> Index<&'a String> for Foo {
+    type Output = isize;
+
+    fn index(&self, z: &String) -> &isize {
+        if *z == "x" {
+            &self.x
+        } else {
+            &self.y
+        }
+    }
+}
+
+impl<'a> IndexMut<&'a String> for Foo {
+    fn index_mut(&mut self, z: &String) -> &mut isize {
+        if *z == "x" {
+            &mut self.x
+        } else {
+            &mut self.y
+        }
+    }
+}
+
+fn test1(mut f: Box<Foo>, s: String) {
+    let p = &mut f[&s];
+    let q = &f[&s]; //~ ERROR cannot borrow
+    p.use_mut();
+}
+
+fn test2(mut f: Box<Foo>, s: String) {
+    let p = &mut f[&s];
+    let q = &mut f[&s]; //~ ERROR cannot borrow
+    p.use_mut();
+}
+
+struct Bar {
+    foo: Foo
+}
+
+fn test3(mut f: Box<Bar>, s: String) {
+    let p = &mut f.foo[&s];
+    let q = &mut f.foo[&s]; //~ ERROR cannot borrow
+    p.use_mut();
+}
+
+fn test4(mut f: Box<Bar>, s: String) {
+    let p = &f.foo[&s];
+    let q = &f.foo[&s];
+    p.use_ref();
+}
+
+fn test5(mut f: Box<Bar>, s: String) {
+    let p = &f.foo[&s];
+    let q = &mut f.foo[&s]; //~ ERROR cannot borrow
+    p.use_ref();
+}
+
+fn test6(mut f: Box<Bar>, g: Foo, s: String) {
+    let p = &f.foo[&s];
+    f.foo = g; //~ ERROR cannot assign
+    p.use_ref();
+}
+
+fn test7(mut f: Box<Bar>, g: Bar, s: String) {
+    let p = &f.foo[&s];
+    *f = g; //~ ERROR cannot assign
+    p.use_ref();
+}
+
+fn test8(mut f: Box<Bar>, g: Foo, s: String) {
+    let p = &mut f.foo[&s];
+    f.foo = g; //~ ERROR cannot assign
+    p.use_mut();
+}
+
+fn test9(mut f: Box<Bar>, g: Bar, s: String) {
+    let p = &mut f.foo[&s];
+    *f = g; //~ ERROR cannot assign
+    p.use_mut();
+}
+
+fn main() {
+}
+
+trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
+impl<T> Fake for T { }