miniextendr_macros::rust_conversion_builder

Struct ConversionSubject

pub(crate) struct ConversionSubject<'a> {
    pub(crate) expected: Expected<'a>,
    pub(crate) quoted: &'a str,
    pub(crate) param: &'a str,
    pub(crate) nullable: bool,
    pub(crate) rust_type: &'a str,
}

Expand description

What a conversion failure is about: the value it names and how.

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§expected: Expected<'a>

Where the expectation in the message prefix comes from.

§quoted: &'a str

The name quoted in the message: the parameter, or a sidecar’s field.

§param: &'a str

e$param: the R formal that failed.

§nullable: bool

The value may be NULL (Option<_>): an expectation the error supplies reads NULL or <expected> (Expected::FromError only).

§rust_type: &'a str

e$rust_type: the Rust type as written.

Auto Trait Implementations§

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impl<'a> UnwindSafe for ConversionSubject<'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 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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