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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/lifetimes/bare-trait-object-borrowck.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/lifetimes/bare-trait-object-borrowck.rs')
-rw-r--r--src/test/ui/lifetimes/bare-trait-object-borrowck.rs24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/lifetimes/bare-trait-object-borrowck.rs b/src/test/ui/lifetimes/bare-trait-object-borrowck.rs
new file mode 100644
index 000000000..45f5e4ae1
--- /dev/null
+++ b/src/test/ui/lifetimes/bare-trait-object-borrowck.rs
@@ -0,0 +1,24 @@
+#![allow(bare_trait_objects)]
+// check-pass
+pub struct FormatWith<'a, I, F> {
+ sep: &'a str,
+ /// FormatWith uses interior mutability because Display::fmt takes &self.
+ inner: RefCell<Option<(I, F)>>,
+}
+
+use std::cell::RefCell;
+use std::fmt;
+
+struct Layout;
+
+pub fn new_format<'a, I, F>(iter: I, separator: &'a str, f: F) -> FormatWith<'a, I, F>
+where
+ I: Iterator,
+ F: FnMut(I::Item, &mut FnMut(&fmt::Display) -> fmt::Result) -> fmt::Result,
+{
+ FormatWith { sep: separator, inner: RefCell::new(Some((iter, f))) }
+}
+
+fn main() {
+ let _ = new_format(0..32, " | ", |i, f| f(&format_args!("0x{:x}", i)));
+}