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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:13 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:13 +0000
commit218caa410aa38c29984be31a5229b9fa717560ee (patch)
treec54bd55eeb6e4c508940a30e94c0032fbd45d677 /src/test/ui/variance/variance-regions-direct.rs
parentReleasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff)
downloadrustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz
rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/variance/variance-regions-direct.rs')
-rw-r--r--src/test/ui/variance/variance-regions-direct.rs65
1 files changed, 0 insertions, 65 deletions
diff --git a/src/test/ui/variance/variance-regions-direct.rs b/src/test/ui/variance/variance-regions-direct.rs
deleted file mode 100644
index 3f34e7655..000000000
--- a/src/test/ui/variance/variance-regions-direct.rs
+++ /dev/null
@@ -1,65 +0,0 @@
-// Test that we correctly infer variance for region parameters in
-// various self-contained types.
-
-#![feature(rustc_attrs)]
-
-// Regions that just appear in normal spots are contravariant:
-
-#[rustc_variance]
-struct Test2<'a, 'b, 'c> { //~ ERROR [-, -, -]
- x: &'a isize,
- y: &'b [isize],
- c: &'c str
-}
-
-// Those same annotations in function arguments become covariant:
-
-#[rustc_variance]
-struct Test3<'a, 'b, 'c> { //~ ERROR [+, +, +]
- x: extern "Rust" fn(&'a isize),
- y: extern "Rust" fn(&'b [isize]),
- c: extern "Rust" fn(&'c str),
-}
-
-// Mutability induces invariance:
-
-#[rustc_variance]
-struct Test4<'a, 'b:'a> { //~ ERROR [-, o]
- x: &'a mut &'b isize,
-}
-
-// Mutability induces invariance, even when in a
-// contravariant context:
-
-#[rustc_variance]
-struct Test5<'a, 'b:'a> { //~ ERROR [+, o]
- x: extern "Rust" fn(&'a mut &'b isize),
-}
-
-// Invariance is a trap from which NO ONE CAN ESCAPE.
-// In other words, even though the `&'b isize` occurs in
-// an argument list (which is contravariant), that
-// argument list occurs in an invariant context.
-
-#[rustc_variance]
-struct Test6<'a, 'b:'a> { //~ ERROR [-, o]
- x: &'a mut extern "Rust" fn(&'b isize),
-}
-
-// No uses at all is bivariant:
-
-#[rustc_variance]
-struct Test7<'a> { //~ ERROR [*]
- x: isize
-}
-
-// Try enums too.
-
-#[rustc_variance]
-enum Test8<'a, 'b, 'c:'b> { //~ ERROR [+, -, o]
- Test8A(extern "Rust" fn(&'a isize)),
- Test8B(&'b [isize]),
- Test8C(&'b mut &'c str),
-}
-
-fn main() {}