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