core::panic

Struct PanicMessage

1.81.0 · source
pub struct PanicMessage<'a> { /* private fields */ }
Expand description

A message that was given to the panic!() macro.

The Display implementation of this type will format the message with the arguments that were given to the panic!() macro.

See PanicInfo::message.

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impl<'a> PanicMessage<'a>

1.81.0 (const: unstable) · source

pub fn as_str(&self) -> Option<&'static str>

Gets the formatted message, if it has no arguments to be formatted at runtime.

This can be used to avoid allocations in some cases.

§Guarantees

For panic!("just a literal"), this function is guaranteed to return Some("just a literal").

For most cases with placeholders, this function will return None.

See fmt::Arguments::as_str for details.

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1.81.0 · source§

impl Debug for PanicMessage<'_>

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fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
1.81.0 · source§

impl Display for PanicMessage<'_>

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fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> Freeze for PanicMessage<'a>

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impl<'a> RefUnwindSafe for PanicMessage<'a>

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impl<'a> !Send for PanicMessage<'a>

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impl<'a> !Sync for PanicMessage<'a>

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impl<'a> Unpin for PanicMessage<'a>

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impl<'a> UnwindSafe for PanicMessage<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.