Struct AsFromStrVec 

pub struct AsFromStrVec<T>(pub Vec<T>);

Wrap a Vec<T: FromStr> parsed from an R character vector.

Each element of the R character vector is parsed into T. Every failure is collected into one error (the first 10 listed, then "and N more"), each with its quoted value and 1-based position ("n/a": invalid digit found in string (element 2)). An NA_character_ element is refused (NA is not allowed (element 3)), not parsed as "".

For numbers read like R’s as.numeric(), with NA as None, use AsNumericVec instead.

Example

use std::net::IpAddr;

#[miniextendr]
fn parse_ips(addrs: AsFromStrVec<IpAddr>) -> Vec<bool> {
    addrs.0.into_iter().map(|ip| ip.is_loopback()).collect()
}
// R: parse_ips(c("127.0.0.1", "8.8.8.8")) → c(TRUE, FALSE)

Tuple Fields

0: Vec<T>

Trait Implementations

impl<T: Clone> Clone for AsFromStrVec<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for AsFromStrVec<T>

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

Formats the value using the given formatter.

impl<T: Display> IntoR for AsFromStrVec<T>

Each value’s Display text as a character vector, which the marker parses back element by element (see AsFromStr’s IntoR).

type Error = <Vec<String> as IntoR>::Error

The error type for fallible conversions.

fn try_into_sexp(self) -> Result<SEXP, Self::Error>

Try to convert this value to an R SEXP.

unsafe fn try_into_sexp_unchecked(self) -> Result<SEXP, Self::Error>

Try to convert to SEXP without thread safety checks.

fn into_sexp(self) -> SEXP

Convert this value to an R SEXP, panicking on error.

unsafe fn into_sexp_unchecked(self) -> SEXP

Convert to SEXP without thread safety checks, panicking on error.

impl<T: FromStr> TryFromSexp for AsFromStrVec<T>

where T::Err: Display,

const CHARACTER_ONLY: bool = true

Whether this conversion accepts only character input: every value it converts, other than NULL, is a character vector or a factor.

type Error = SexpError

The error type returned when conversion fails.

fn try_from_sexp(sexp: SEXP) -> Result<Self, Self::Error>

Attempt to convert an R SEXP to this Rust type.

const NATIVE_BORROW: Option<NativeBorrow> = None

Native vector storage retained by this conversion, if any.

#[doc(hidden)]

const __MX_EXPECTATION: Option<&'static str> = None

What an argument of this type must be, in R terms, when #[miniextendr] cannot tell from the type as written: the <expected> of a failed conversion’s '<p>' must be <expected>: ....

unsafe fn try_from_sexp_unchecked(sexp: SEXP) -> Result<Self, Self::Error>

Convert from SEXP without thread safety checks.

#[doc(hidden)]

unsafe fn __mx_try_from_rooted(root: Root<'_>) -> Result<Self, Self::Error>

Convert with a scope able to retain uncached ALTREP elements. Custom reference converters keep their existing behavior by default.

#[doc(hidden)]

fn __mx_has_na(&self) -> bool

Whether the converted argument holds a value #[miniextendr(no_na)] refuses after the conversion.

#[doc(hidden)]

fn __mx_input_has_na(&self, input: SEXP) -> bool

Whether #[miniextendr(no_na)] refuses this converted argument, read from input (the R value it converted from), when no R guard ran.

#[doc(hidden)]

fn __mx_try_from_sexp_with_check( sexp: SEXP, check: &ElementCheck<'_>, ) -> Result<Self, SexpError>

where Self::Error: Into<SexpError>,

Convert, running check, an element type’s TryFromSexpElement::check_sexp, on the R value that carries an element’s class (#1837).

#[doc(hidden)]

unsafe fn __mx_try_from_sexp_unchecked_with_check( sexp: SEXP, check: &ElementCheck<'_>, ) -> Result<Self, SexpError>

where Self::Error: Into<SexpError>,

__mx_try_from_sexp_with_check through try_from_sexp_unchecked. Not public API.

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.

Size: 24 bytes