Struct TryEvalData

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struct TryEvalData {
    body: unsafe extern "C-unwind" fn(*mut c_void) -> SEXP,
    body_data: *mut c_void,
    slot: SEXP,
    caught: bool,
}

Expand description

What catch_error shares with its callbacks.

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§body: unsafe extern "C-unwind" fn(*mut c_void) -> SEXP

R_tryCatchError’s body: eval_body for an R expression.

§body_data: *mut c_void§slot: SEXP

A protected list of one, which receives the value or the caught condition. The callbacks store into it without allocating, so what they hand back is rooted before R runs again.

§caught: bool

Whether the error handler ran.

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impl TryEvalData

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fn new( body: unsafe extern "C-unwind" fn(mut c_void) -> SEXP, body_data: mut c_void, slot: SEXP, ) -> Self

The call of body(body_data); slot is a protected list of one.

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fn outcome(&self) -> Caught

How catch_error ended, once it has returned. The SEXP is rooted by the slot.

Auto Trait Implementations§

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impl RefUnwindSafe for TryEvalData

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impl UnsafeUnpin for TryEvalData

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impl UnwindSafe for TryEvalData

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 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> SizeHint for T
where T: ?Sized,

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default fn lower_bound(&self) -> usize

🔬This is a nightly-only experimental API. (core_io_internals)

Returns a lower bound on the number of elements this container-like item contains. For example, an array [u8; 12] could return any value between 0 and 12 inclusively as a correct implementation. Read more

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default fn upper_bound(&self) -> Option<usize>

🔬This is a nightly-only experimental API. (core_io_internals)

Returns an upper bound on the number of elements this container-like item contains if it can be determined, otherwise None. Read more

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final fn size_hint(&self) -> (usize, Option<usize>)

🔬This is a nightly-only experimental API. (core_io_internals)

Returns an estimate for the number of elements this container like type contains. Read more

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