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, 112 insertions, 0 deletions

diff --git a/library/core/src/panic.rs b/library/core/src/panic.rs
new file mode 100644
index 000000000..00b63dfbd
--- /dev/null
+++ b/library/core/src/panic.rs
@@ -0,0 +1,112 @@
+//! Panic support in the standard library.
+
+#![stable(feature = "core_panic_info", since = "1.41.0")]
+
+mod location;
+mod panic_info;
+mod unwind_safe;
+
+use crate::any::Any;
+
+#[stable(feature = "panic_hooks", since = "1.10.0")]
+pub use self::location::Location;
+#[stable(feature = "panic_hooks", since = "1.10.0")]
+pub use self::panic_info::PanicInfo;
+#[stable(feature = "catch_unwind", since = "1.9.0")]
+pub use self::unwind_safe::{AssertUnwindSafe, RefUnwindSafe, UnwindSafe};
+
+#[doc(hidden)]
+#[unstable(feature = "edition_panic", issue = "none", reason = "use panic!() instead")]
+#[allow_internal_unstable(core_panic, const_format_args)]
+#[rustc_diagnostic_item = "core_panic_2015_macro"]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro panic_2015 {
+    () => (
+        $crate::panicking::panic("explicit panic")
+    ),
+    ($msg:literal $(,)?) => (
+        $crate::panicking::panic($msg)
+    ),
+    // Use `panic_str` instead of `panic_display::<&str>` for non_fmt_panic lint.
+    ($msg:expr $(,)?) => (
+        $crate::panicking::panic_str($msg)
+    ),
+    // Special-case the single-argument case for const_panic.
+    ("{}", $arg:expr $(,)?) => (
+        $crate::panicking::panic_display(&$arg)
+    ),
+    ($fmt:expr, $($arg:tt)+) => (
+        $crate::panicking::panic_fmt($crate::const_format_args!($fmt, $($arg)+))
+    ),
+}
+
+#[doc(hidden)]
+#[unstable(feature = "edition_panic", issue = "none", reason = "use panic!() instead")]
+#[allow_internal_unstable(core_panic, const_format_args)]
+#[rustc_diagnostic_item = "core_panic_2021_macro"]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro panic_2021 {
+    () => (
+        $crate::panicking::panic("explicit panic")
+    ),
+    // Special-case the single-argument case for const_panic.
+    ("{}", $arg:expr $(,)?) => (
+        $crate::panicking::panic_display(&$arg)
+    ),
+    ($($t:tt)+) => (
+        $crate::panicking::panic_fmt($crate::const_format_args!($($t)+))
+    ),
+}
+
+#[doc(hidden)]
+#[unstable(feature = "edition_panic", issue = "none", reason = "use unreachable!() instead")]
+#[allow_internal_unstable(core_panic)]
+#[rustc_diagnostic_item = "unreachable_2015_macro"]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro unreachable_2015 {
+    () => (
+        $crate::panicking::panic("internal error: entered unreachable code")
+    ),
+    // Use of `unreachable_display` for non_fmt_panic lint.
+    // NOTE: the message ("internal error ...") is embedded directly in unreachable_display
+    ($msg:expr $(,)?) => (
+        $crate::panicking::unreachable_display(&$msg)
+    ),
+    ($fmt:expr, $($arg:tt)*) => (
+        $crate::panic!($crate::concat!("internal error: entered unreachable code: ", $fmt), $($arg)*)
+    ),
+}
+
+#[doc(hidden)]
+#[unstable(feature = "edition_panic", issue = "none", reason = "use unreachable!() instead")]
+#[allow_internal_unstable(core_panic)]
+#[rustc_diagnostic_item = "unreachable_2021_macro"]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro unreachable_2021 {
+    () => (
+        $crate::panicking::panic("internal error: entered unreachable code")
+    ),
+    ($($t:tt)+) => (
+        $crate::panic!("internal error: entered unreachable code: {}", $crate::format_args!($($t)+))
+    ),
+}
+
+/// An internal trait used by libstd to pass data from libstd to `panic_unwind`
+/// and other panic runtimes. Not intended to be stabilized any time soon, do
+/// not use.
+#[unstable(feature = "std_internals", issue = "none")]
+#[doc(hidden)]
+pub unsafe trait BoxMeUp {
+    /// Take full ownership of the contents.
+    /// The return type is actually `Box<dyn Any + Send>`, but we cannot use `Box` in libcore.
+    ///
+    /// After this method got called, only some dummy default value is left in `self`.
+    /// Calling this method twice, or calling `get` after calling this method, is an error.
+    ///
+    /// The argument is borrowed because the panic runtime (`__rust_start_panic`) only
+    /// gets a borrowed `dyn BoxMeUp`.
+    fn take_box(&mut self) -> *mut (dyn Any + Send);
+
+    /// Just borrow the contents.
+    fn get(&mut self) -> &(dyn Any + Send);
+}