Struct Argument 

#[doc(hidden)]
pub struct Argument<T>(PhantomData<fn() -> T>);

An inferred method argument type, used only by generated wrappers.

Tuple Fields

0: PhantomData<fn() -> T>

Implementations

impl<T> Argument<T>

pub const NEW: Self

Construct a type witness without constructing an argument.

pub fn convert(&self, input: SEXP) -> Result<T, T::Error>

where T: TryFromSexp,

Convert through the inferred type’s ordinary converter.

pub fn rooted<'a>(&self, input: Root<'a>) -> Result<T, T::Error>

where T: TryFromRoot<'a>,

Convert a borrow whose lifetime is tied to the wrapper’s root.

pub fn native_borrow(&self) -> Option<NativeBorrow>

where T: TryFromSexp,

The ordinary converter’s alias-preflight metadata.

pub fn rooted_native_borrow<'a>(&self) -> Option<NativeBorrow>

where T: TryFromRoot<'a>,

The rooted converter’s alias-preflight metadata.

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

where T: TryFromSexp,

The ordinary converter’s R-facing diagnostic expectation.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

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