Struct proc_macro::ExpandError

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#[non_exhaustive]
pub struct ExpandError;

🔬 This is a nightly-only experimental API. (proc_macro_expand #90765)

Expand description

Error returned from TokenStream::expand_expr.

Trait Implementations

impl Debug for ExpandError

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

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Formats the value using the given formatter. Read more

impl Display for ExpandError

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

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Formats the value using the given formatter. Read more

impl Error for ExpandError

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fn source(&self) -> Option<&(dyn Error + 'static)>

1.30.0 · source

The lower-level source of this error, if any. Read more

fn backtrace(&self) -> Option<&Backtrace>

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🔬 This is a nightly-only experimental API. (backtrace #53487)

Returns a stack backtrace, if available, of where this error occurred. Read more

fn description(&self) -> &str

1.0.0 · source

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

1.0.0 · source

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl !Send for ExpandError

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impl !Sync for ExpandError

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Auto Trait Implementations

impl RefUnwindSafe for ExpandError

impl Unpin for ExpandError

impl UnwindSafe for ExpandError

Blanket Implementations

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

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fn type_id(&self) -> TypeId

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Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

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fn borrow(&self) -> &T

const: unstable · source

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

const: unstable · source

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

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fn from(t: T) -> T

const: unstable · source

Returns the argument unchanged.

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

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fn into(self) -> U

const: unstable · source

Calls U::from(self).

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

impl<T> ToString for T where
T: Display + ?Sized,

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default fn to_string(&self) -> String

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Converts the given value to a String. Read more

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

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type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

const: unstable · source

Performs the conversion.

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

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type Error = >::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, >::Error>

const: unstable · source

Performs the conversion.

Struct proc_macro::ExpandError

Trait Implementations

impl Debug for ExpandError

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

impl Display for ExpandError

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

impl Error for ExpandError

fn source(&self) -> Option<&(dyn Error + 'static)>

fn backtrace(&self) -> Option<&Backtrace>

fn description(&self) -> &str

fn cause(&self) -> Option<&dyn Error>

impl !Send for ExpandError

impl !Sync for ExpandError

Auto Trait Implementations

impl RefUnwindSafe for ExpandError

impl Unpin for ExpandError

impl UnwindSafe for ExpandError

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> ToString for T where
T: Display + ?Sized,

default fn to_string(&self) -> String

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

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

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct proc_macro::ExpandError

Trait Implementations

impl Debug for ExpandError

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

impl Display for ExpandError

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

impl Error for ExpandError

fn source(&self) -> Option<&(dyn Error + 'static)>

fn backtrace(&self) -> Option<&Backtrace>

fn description(&self) -> &str

fn cause(&self) -> Option<&dyn Error>

impl !Send for ExpandError

impl !Sync for ExpandError

Auto Trait Implementations

impl RefUnwindSafe for ExpandError

impl Unpin for ExpandError

impl UnwindSafe for ExpandError

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> ToString for T where T: Display + ?Sized,

default fn to_string(&self) -> String

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

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

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

impl<T> ToString for T where
T: Display + ?Sized,

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

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