Trait extendr_api::TryFrom

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pub trait TryFrom<T>: Sized {
    type Error;

    // Required method
    fn try_from(value: T) -> Result<Self, Self::Error>;
}
Expand description

Simple and safe type conversions that may fail in a controlled way under some circumstances. It is the reciprocal of TryInto.

This is useful when you are doing a type conversion that may trivially succeed but may also need special handling. For example, there is no way to convert an i64 into an i32 using the From trait, because an i64 may contain a value that an i32 cannot represent and so the conversion would lose data. This might be handled by truncating the i64 to an i32 or by simply returning i32::MAX, or by some other method. The From trait is intended for perfect conversions, so the TryFrom trait informs the programmer when a type conversion could go bad and lets them decide how to handle it.

§Generic Implementations

  • TryFrom<T> for U implies TryInto<U> for T
  • try_from is reflexive, which means that TryFrom<T> for T is implemented and cannot fail – the associated Error type for calling T::try_from() on a value of type T is Infallible. When the ! type is stabilized Infallible and ! will be equivalent.

TryFrom<T> can be implemented as follows:

struct GreaterThanZero(i32);

impl TryFrom<i32> for GreaterThanZero {
    type Error = &'static str;

    fn try_from(value: i32) -> Result<Self, Self::Error> {
        if value <= 0 {
            Err("GreaterThanZero only accepts values greater than zero!")
        } else {
            Ok(GreaterThanZero(value))
        }
    }
}

§Examples

As described, i32 implements TryFrom<i64>:

let big_number = 1_000_000_000_000i64;
// Silently truncates `big_number`, requires detecting
// and handling the truncation after the fact.
let smaller_number = big_number as i32;
assert_eq!(smaller_number, -727379968);

// Returns an error because `big_number` is too big to
// fit in an `i32`.
let try_smaller_number = i32::try_from(big_number);
assert!(try_smaller_number.is_err());

// Returns `Ok(3)`.
let try_successful_smaller_number = i32::try_from(3);
assert!(try_successful_smaller_number.is_ok());

Required Associated Types§

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type Error

The type returned in the event of a conversion error.

Required Methods§

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fn try_from(value: T) -> Result<Self, Self::Error>

Performs the conversion.

Object Safety§

This trait is not object safe.

Implementors§

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impl TryFrom<&BigInt> for i8

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impl TryFrom<&BigInt> for i16

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impl TryFrom<&BigInt> for i32

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impl TryFrom<&BigInt> for i64

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impl TryFrom<&BigInt> for i128

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impl TryFrom<&BigInt> for isize

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impl TryFrom<&BigInt> for u8

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impl TryFrom<&BigInt> for u16

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impl TryFrom<&BigInt> for u32

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impl TryFrom<&BigInt> for u64

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impl TryFrom<&BigInt> for u128

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impl TryFrom<&BigInt> for usize

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impl TryFrom<&BigInt> for BigUint

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impl TryFrom<&BigUint> for i8

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impl TryFrom<&BigUint> for i16

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impl TryFrom<&BigUint> for i32

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impl TryFrom<&BigUint> for i64

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impl TryFrom<&BigUint> for i128

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impl TryFrom<&BigUint> for isize

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impl TryFrom<&BigUint> for u8

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impl TryFrom<&BigUint> for u16

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impl TryFrom<&BigUint> for u32

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impl TryFrom<&BigUint> for u64

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impl TryFrom<&BigUint> for u128

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impl TryFrom<&BigUint> for usize

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impl TryFrom<&Robj> for &str

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type Error = Error

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impl TryFrom<&Robj> for &[f64]

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type Error = Error

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impl TryFrom<&Robj> for &[i32]

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type Error = Error

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impl TryFrom<&Robj> for &[u8]

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type Error = Error

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impl TryFrom<&Robj> for &[Rbool]

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type Error = Error

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impl TryFrom<&Robj> for &[Rcplx]

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type Error = Error

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impl TryFrom<&Robj> for &[Rfloat]

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type Error = Error

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impl TryFrom<&Robj> for &[Rint]

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type Error = Error

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impl TryFrom<&Robj> for Option<&str>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[f64]>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[i32]>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[u8]>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[Rbool]>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[Rcplx]>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[Rfloat]>

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type Error = Error

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impl TryFrom<&Robj> for Option<&[Rint]>

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type Error = Error

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impl TryFrom<&Robj> for Option<bool>

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type Error = Error

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impl TryFrom<&Robj> for Option<f32>

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type Error = Error

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impl TryFrom<&Robj> for Option<f64>

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type Error = Error

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impl TryFrom<&Robj> for Option<i8>

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type Error = Error

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impl TryFrom<&Robj> for Option<i16>

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type Error = Error

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impl TryFrom<&Robj> for Option<i32>

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type Error = Error

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impl TryFrom<&Robj> for Option<i64>

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type Error = Error

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impl TryFrom<&Robj> for Option<isize>

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type Error = Error

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impl TryFrom<&Robj> for Option<u8>

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type Error = Error

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impl TryFrom<&Robj> for Option<u16>

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type Error = Error

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impl TryFrom<&Robj> for Option<u32>

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type Error = Error

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impl TryFrom<&Robj> for Option<u64>

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type Error = Error

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impl TryFrom<&Robj> for Option<usize>

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type Error = Error

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impl TryFrom<&Robj> for Option<String>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<f64>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<i32>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<u8>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<String>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<Rbool>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<Rcplx>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<Rfloat>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Vec<Rint>>

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type Error = Error

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impl TryFrom<&Robj> for Option<HashMap<&str, Robj>>

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type Error = Error

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impl TryFrom<&Robj> for Option<HashMap<String, Robj>>

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type Error = Error

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impl TryFrom<&Robj> for Option<Rbool>

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type Error = Error

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impl TryFrom<&Robj> for Option<Rcplx>

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type Error = Error

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impl TryFrom<&Robj> for Option<Rfloat>

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type Error = Error

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impl TryFrom<&Robj> for Option<Rint>

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type Error = Error

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impl TryFrom<&Robj> for bool

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type Error = Error

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impl TryFrom<&Robj> for f32

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type Error = Error

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impl TryFrom<&Robj> for f64

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type Error = Error

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impl TryFrom<&Robj> for i8

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type Error = Error

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impl TryFrom<&Robj> for i16

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type Error = Error

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impl TryFrom<&Robj> for i32

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type Error = Error

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impl TryFrom<&Robj> for i64

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type Error = Error

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impl TryFrom<&Robj> for isize

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type Error = Error

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impl TryFrom<&Robj> for u8

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type Error = Error

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impl TryFrom<&Robj> for u16

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type Error = Error

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impl TryFrom<&Robj> for u32

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type Error = Error

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impl TryFrom<&Robj> for u64

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type Error = Error

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impl TryFrom<&Robj> for usize

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type Error = Error

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impl TryFrom<&Robj> for String

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type Error = Error

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impl TryFrom<&Robj> for Vec<f64>

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type Error = Error

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impl TryFrom<&Robj> for Vec<i32>

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type Error = Error

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impl TryFrom<&Robj> for Vec<u8>

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type Error = Error

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impl TryFrom<&Robj> for Vec<String>

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type Error = Error

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impl TryFrom<&Robj> for Vec<Rbool>

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type Error = Error

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impl TryFrom<&Robj> for Vec<Rcplx>

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type Error = Error

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impl TryFrom<&Robj> for Vec<Rfloat>

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type Error = Error

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impl TryFrom<&Robj> for Vec<Rint>

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type Error = Error

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impl TryFrom<&Robj> for HashMap<&str, Robj>

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type Error = Error

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impl TryFrom<&Robj> for HashMap<String, Robj>

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type Error = Error

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impl TryFrom<&Robj> for StrIter

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type Error = Error

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impl TryFrom<&Robj> for Mat<f64>

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type Error = Error

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impl TryFrom<&Robj> for Rbool

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type Error = Error

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impl TryFrom<&Robj> for Rcplx

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type Error = Error

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impl TryFrom<&Robj> for Rfloat

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type Error = Error

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impl TryFrom<&Robj> for Rint

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type Error = Error

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impl TryFrom<&Robj> for Altrep

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type Error = Error

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impl TryFrom<&Robj> for Complexes

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type Error = Error

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impl TryFrom<&Robj> for Doubles

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type Error = Error

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impl TryFrom<&Robj> for Environment

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type Error = Error

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impl TryFrom<&Robj> for Expressions

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type Error = Error

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impl TryFrom<&Robj> for Function

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type Error = Error

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impl TryFrom<&Robj> for Integers

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type Error = Error

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impl TryFrom<&Robj> for Language

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type Error = Error

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impl TryFrom<&Robj> for List

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type Error = Error

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impl TryFrom<&Robj> for ListIter

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type Error = Error

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impl TryFrom<&Robj> for Logicals

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type Error = Error

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impl TryFrom<&Robj> for Pairlist

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type Error = Error

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impl TryFrom<&Robj> for PairlistIter

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type Error = Error

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impl TryFrom<&Robj> for Primitive

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type Error = Error

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impl TryFrom<&Robj> for Promise

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type Error = Error

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impl TryFrom<&Robj> for Raw

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type Error = Error

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impl TryFrom<&Robj> for Rstr

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type Error = Error

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impl TryFrom<&Robj> for S4

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type Error = Error

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impl TryFrom<&Robj> for Strings

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type Error = Error

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impl TryFrom<&Robj> for Symbol

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type Error = Error

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impl TryFrom<char> for u8

Maps a char with code point in U+0000..=U+00FF to a byte in 0x00..=0xFF with same value, failing if the code point is greater than U+00FF.

See impl From<u8> for char for details on the encoding.

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impl TryFrom<char> for u16

Maps a char with code point in U+0000..=U+FFFF to a u16 in 0x0000..=0xFFFF with same value, failing if the code point is greater than U+FFFF.

This corresponds to the UCS-2 encoding, as specified in ISO/IEC 10646:2003.

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impl TryFrom<i8> for u8

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impl TryFrom<i8> for u16

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impl TryFrom<i8> for u32

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impl TryFrom<i8> for u64

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impl TryFrom<i8> for u128

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impl TryFrom<i8> for usize

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impl TryFrom<i8> for NonZero<i8>

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impl TryFrom<i8> for BigUint

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impl TryFrom<i16> for i8

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impl TryFrom<i16> for u8

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impl TryFrom<i16> for u16

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impl TryFrom<i16> for u32

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impl TryFrom<i16> for u64

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impl TryFrom<i16> for u128

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impl TryFrom<i16> for usize

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impl TryFrom<i16> for NonZero<i16>

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impl TryFrom<i16> for BigUint

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impl TryFrom<i32> for i8

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impl TryFrom<i32> for i16

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impl TryFrom<i32> for isize

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impl TryFrom<i32> for u8

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impl TryFrom<i32> for u16

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impl TryFrom<i32> for u32

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impl TryFrom<i32> for u64

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impl TryFrom<i32> for u128

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impl TryFrom<i32> for usize

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impl TryFrom<i32> for NonZero<i32>

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impl TryFrom<i32> for BigUint

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impl TryFrom<i64> for i8

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impl TryFrom<i64> for i16

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impl TryFrom<i64> for i32

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impl TryFrom<i64> for isize

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impl TryFrom<i64> for u8

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impl TryFrom<i64> for u16

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impl TryFrom<i64> for u32

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impl TryFrom<i64> for u64

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impl TryFrom<i64> for u128

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impl TryFrom<i64> for usize

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impl TryFrom<i64> for NonZero<i64>

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impl TryFrom<i64> for BigUint

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impl TryFrom<i128> for i8

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impl TryFrom<i128> for i16

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impl TryFrom<i128> for i32

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impl TryFrom<i128> for i64

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impl TryFrom<i128> for isize

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impl TryFrom<i128> for u8

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impl TryFrom<i128> for u16

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impl TryFrom<i128> for u32

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impl TryFrom<i128> for u64

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impl TryFrom<i128> for u128

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impl TryFrom<i128> for usize

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impl TryFrom<i128> for NonZero<i128>

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impl TryFrom<i128> for BigUint

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impl TryFrom<isize> for i8

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impl TryFrom<isize> for i16

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impl TryFrom<isize> for i32

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impl TryFrom<isize> for i64

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impl TryFrom<isize> for i128

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impl TryFrom<isize> for u8

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impl TryFrom<isize> for u16

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impl TryFrom<isize> for u32

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impl TryFrom<isize> for u64

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impl TryFrom<isize> for u128

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impl TryFrom<isize> for usize

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impl TryFrom<isize> for NonZero<isize>

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impl TryFrom<isize> for BigUint

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impl TryFrom<u8> for i8

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impl TryFrom<u8> for NonZero<u8>

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impl TryFrom<u16> for i8

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impl TryFrom<u16> for i16

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impl TryFrom<u16> for isize

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impl TryFrom<u16> for u8

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impl TryFrom<u16> for NonZero<u16>

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impl TryFrom<u32> for char

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impl TryFrom<u32> for i8

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impl TryFrom<u32> for i16

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impl TryFrom<u32> for i32

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impl TryFrom<u32> for isize

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impl TryFrom<u32> for u8

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impl TryFrom<u32> for u16

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impl TryFrom<u32> for usize

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impl TryFrom<u32> for NonZero<u32>

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impl TryFrom<u64> for i8

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impl TryFrom<u64> for i16

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impl TryFrom<u64> for i32

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impl TryFrom<u64> for i64

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impl TryFrom<u64> for isize

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impl TryFrom<u64> for u8

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impl TryFrom<u64> for u16

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impl TryFrom<u64> for u32

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impl TryFrom<u64> for usize

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impl TryFrom<u64> for NonZero<u64>

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impl TryFrom<u128> for i8

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impl TryFrom<u128> for i16

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impl TryFrom<u128> for i32

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impl TryFrom<u128> for i64

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impl TryFrom<u128> for i128

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impl TryFrom<u128> for isize

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impl TryFrom<u128> for u8

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impl TryFrom<u128> for u16

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impl TryFrom<u128> for u32

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impl TryFrom<u128> for u64

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impl TryFrom<u128> for usize

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impl TryFrom<u128> for NonZero<u128>

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impl TryFrom<usize> for i8

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impl TryFrom<usize> for i16

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impl TryFrom<usize> for i32

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impl TryFrom<usize> for i64

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impl TryFrom<usize> for i128

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impl TryFrom<usize> for isize

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impl TryFrom<usize> for u8

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impl TryFrom<usize> for u16

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impl TryFrom<usize> for u32

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impl TryFrom<usize> for u64

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impl TryFrom<usize> for u128

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impl TryFrom<usize> for NonZero<usize>

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impl TryFrom<usize> for Alignment

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impl TryFrom<Vec<bool>> for Logicals

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type Error = Error

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impl TryFrom<Vec<f64>> for Doubles

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type Error = Error

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impl TryFrom<Vec<i32>> for Integers

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type Error = Error

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impl TryFrom<Vec<Complex<f64>>> for Complexes

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type Error = Error

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impl TryFrom<NonZero<i8>> for NonZero<u8>

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impl TryFrom<NonZero<i8>> for NonZero<u16>

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impl TryFrom<NonZero<i8>> for NonZero<u32>

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impl TryFrom<NonZero<i8>> for NonZero<u64>

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impl TryFrom<NonZero<i8>> for NonZero<u128>

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impl TryFrom<NonZero<i8>> for NonZero<usize>

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impl TryFrom<NonZero<i16>> for NonZero<i8>

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impl TryFrom<NonZero<i16>> for NonZero<u8>

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impl TryFrom<NonZero<i16>> for NonZero<u16>

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impl TryFrom<NonZero<i16>> for NonZero<u32>

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impl TryFrom<NonZero<i16>> for NonZero<u64>

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impl TryFrom<NonZero<i16>> for NonZero<u128>

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impl TryFrom<NonZero<i16>> for NonZero<usize>

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impl TryFrom<NonZero<i32>> for NonZero<i8>

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impl TryFrom<NonZero<i32>> for NonZero<i16>

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impl TryFrom<NonZero<i32>> for NonZero<isize>

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impl TryFrom<NonZero<i32>> for NonZero<u8>

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impl TryFrom<NonZero<i32>> for NonZero<u16>

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impl TryFrom<NonZero<i32>> for NonZero<u32>

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impl TryFrom<NonZero<i32>> for NonZero<u64>

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impl TryFrom<NonZero<i32>> for NonZero<u128>

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impl TryFrom<NonZero<i32>> for NonZero<usize>

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impl TryFrom<NonZero<i64>> for NonZero<i8>

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impl TryFrom<NonZero<i64>> for NonZero<i16>

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impl TryFrom<NonZero<i64>> for NonZero<i32>

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impl TryFrom<NonZero<i64>> for NonZero<isize>

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impl TryFrom<NonZero<i64>> for NonZero<u8>

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impl TryFrom<NonZero<i64>> for NonZero<u16>

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impl TryFrom<NonZero<i64>> for NonZero<u32>

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impl TryFrom<NonZero<i64>> for NonZero<u64>

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impl TryFrom<NonZero<i64>> for NonZero<u128>

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impl TryFrom<NonZero<i64>> for NonZero<usize>

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impl TryFrom<NonZero<i128>> for NonZero<i8>

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impl TryFrom<NonZero<i128>> for NonZero<i16>

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impl TryFrom<NonZero<i128>> for NonZero<i32>

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impl TryFrom<NonZero<i128>> for NonZero<i64>

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impl TryFrom<NonZero<i128>> for NonZero<isize>

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impl TryFrom<NonZero<i128>> for NonZero<u8>

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impl TryFrom<NonZero<i128>> for NonZero<u16>

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impl TryFrom<NonZero<i128>> for NonZero<u32>

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impl TryFrom<NonZero<i128>> for NonZero<u64>

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impl TryFrom<NonZero<i128>> for NonZero<u128>

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impl TryFrom<NonZero<i128>> for NonZero<usize>

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impl TryFrom<NonZero<isize>> for NonZero<i8>

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impl TryFrom<NonZero<isize>> for NonZero<i16>

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impl TryFrom<NonZero<isize>> for NonZero<i32>

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impl TryFrom<NonZero<isize>> for NonZero<i64>

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impl TryFrom<NonZero<isize>> for NonZero<i128>

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impl TryFrom<NonZero<isize>> for NonZero<u8>

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impl TryFrom<NonZero<isize>> for NonZero<u16>

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impl TryFrom<NonZero<isize>> for NonZero<u32>

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impl TryFrom<NonZero<isize>> for NonZero<u64>

1.49.0 · source§

impl TryFrom<NonZero<isize>> for NonZero<u128>

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impl TryFrom<NonZero<isize>> for NonZero<usize>

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impl TryFrom<NonZero<u8>> for NonZero<i8>

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impl TryFrom<NonZero<u16>> for NonZero<i8>

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impl TryFrom<NonZero<u16>> for NonZero<i16>

1.49.0 · source§

impl TryFrom<NonZero<u16>> for NonZero<isize>

1.49.0 · source§

impl TryFrom<NonZero<u16>> for NonZero<u8>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<i8>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<i16>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<i32>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<isize>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<u8>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<u16>

1.49.0 · source§

impl TryFrom<NonZero<u32>> for NonZero<usize>

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impl TryFrom<NonZero<u64>> for NonZero<i8>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<i16>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<i32>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<i64>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<isize>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<u8>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<u16>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<u32>

1.49.0 · source§

impl TryFrom<NonZero<u64>> for NonZero<usize>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<i8>

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impl TryFrom<NonZero<u128>> for NonZero<i16>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<i32>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<i64>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<i128>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<isize>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<u8>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<u16>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<u32>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<u64>

1.49.0 · source§

impl TryFrom<NonZero<u128>> for NonZero<usize>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<i8>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<i16>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<i32>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<i64>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<i128>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<isize>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<u8>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<u16>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<u32>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<u64>

1.49.0 · source§

impl TryFrom<NonZero<usize>> for NonZero<u128>

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impl TryFrom<NonZero<usize>> for Alignment

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impl TryFrom<BigInt> for i8

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impl TryFrom<BigInt> for i16

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impl TryFrom<BigInt> for i32

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impl TryFrom<BigInt> for i64

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impl TryFrom<BigInt> for i128

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impl TryFrom<BigInt> for isize

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impl TryFrom<BigInt> for u8

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impl TryFrom<BigInt> for u16

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impl TryFrom<BigInt> for u32

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impl TryFrom<BigInt> for u64

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impl TryFrom<BigInt> for u128

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impl TryFrom<BigInt> for usize

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impl TryFrom<BigInt> for BigUint

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impl TryFrom<BigUint> for i8

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impl TryFrom<BigUint> for i16

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impl TryFrom<BigUint> for i32

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impl TryFrom<BigUint> for i64

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impl TryFrom<BigUint> for i128

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impl TryFrom<BigUint> for isize

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impl TryFrom<BigUint> for u8

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impl TryFrom<BigUint> for u16

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impl TryFrom<BigUint> for u32

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impl TryFrom<BigUint> for u64

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impl TryFrom<BigUint> for u128

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impl TryFrom<BigUint> for usize

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impl TryFrom<Robj> for &str

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type Error = Error

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impl TryFrom<Robj> for &[f64]

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type Error = Error

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impl TryFrom<Robj> for &[i32]

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type Error = Error

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impl TryFrom<Robj> for &[u8]

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type Error = Error

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impl TryFrom<Robj> for &[Rbool]

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type Error = Error

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impl TryFrom<Robj> for &[Rcplx]

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type Error = Error

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impl TryFrom<Robj> for &[Rfloat]

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type Error = Error

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impl TryFrom<Robj> for &[Rint]

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type Error = Error

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impl TryFrom<Robj> for Option<&str>

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type Error = Error

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impl TryFrom<Robj> for Option<&[f64]>

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type Error = Error

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impl TryFrom<Robj> for Option<&[i32]>

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type Error = Error

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impl TryFrom<Robj> for Option<&[u8]>

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type Error = Error

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impl TryFrom<Robj> for Option<&[Rbool]>

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type Error = Error

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impl TryFrom<Robj> for Option<&[Rcplx]>

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type Error = Error

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impl TryFrom<Robj> for Option<&[Rfloat]>

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type Error = Error

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impl TryFrom<Robj> for Option<&[Rint]>

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type Error = Error

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impl TryFrom<Robj> for Option<bool>

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type Error = Error

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impl TryFrom<Robj> for Option<f32>

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type Error = Error

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impl TryFrom<Robj> for Option<f64>

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type Error = Error

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impl TryFrom<Robj> for Option<i8>

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type Error = Error

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impl TryFrom<Robj> for Option<i16>

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type Error = Error

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impl TryFrom<Robj> for Option<i32>

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type Error = Error

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impl TryFrom<Robj> for Option<i64>

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type Error = Error

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impl TryFrom<Robj> for Option<isize>

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type Error = Error

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impl TryFrom<Robj> for Option<u8>

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type Error = Error

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impl TryFrom<Robj> for Option<u16>

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type Error = Error

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impl TryFrom<Robj> for Option<u32>

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type Error = Error

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impl TryFrom<Robj> for Option<u64>

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type Error = Error

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impl TryFrom<Robj> for Option<usize>

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type Error = Error

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impl TryFrom<Robj> for Option<String>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<f64>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<i32>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<u8>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<String>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<Rbool>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<Rcplx>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<Rfloat>>

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type Error = Error

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impl TryFrom<Robj> for Option<Vec<Rint>>

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type Error = Error

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impl TryFrom<Robj> for Option<HashMap<&str, Robj>>

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type Error = Error

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impl TryFrom<Robj> for Option<HashMap<String, Robj>>

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type Error = Error

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impl TryFrom<Robj> for Option<Rbool>

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type Error = Error

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impl TryFrom<Robj> for Option<Rcplx>

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type Error = Error

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impl TryFrom<Robj> for Option<Rfloat>

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type Error = Error

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impl TryFrom<Robj> for Option<Rint>

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type Error = Error

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impl TryFrom<Robj> for bool

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type Error = Error

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impl TryFrom<Robj> for f32

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type Error = Error

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impl TryFrom<Robj> for f64

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type Error = Error

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impl TryFrom<Robj> for i8

§

type Error = Error

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impl TryFrom<Robj> for i16

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type Error = Error

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impl TryFrom<Robj> for i32

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type Error = Error

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impl TryFrom<Robj> for i64

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type Error = Error

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impl TryFrom<Robj> for isize

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type Error = Error

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impl TryFrom<Robj> for u8

§

type Error = Error

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impl TryFrom<Robj> for u16

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type Error = Error

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impl TryFrom<Robj> for u32

§

type Error = Error

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impl TryFrom<Robj> for u64

§

type Error = Error

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impl TryFrom<Robj> for usize

§

type Error = Error

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impl TryFrom<Robj> for String

§

type Error = Error

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impl TryFrom<Robj> for Vec<f64>

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type Error = Error

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impl TryFrom<Robj> for Vec<i32>

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type Error = Error

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impl TryFrom<Robj> for Vec<u8>

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type Error = Error

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impl TryFrom<Robj> for Vec<String>

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type Error = Error

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impl TryFrom<Robj> for Vec<Rbool>

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type Error = Error

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impl TryFrom<Robj> for Vec<Rcplx>

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type Error = Error

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impl TryFrom<Robj> for Vec<Rfloat>

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type Error = Error

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impl TryFrom<Robj> for Vec<Rint>

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type Error = Error

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impl TryFrom<Robj> for HashMap<&str, Robj>

§

type Error = Error

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impl TryFrom<Robj> for HashMap<String, Robj>

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type Error = Error

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impl TryFrom<Robj> for Mat<f64>

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type Error = Error

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impl TryFrom<Robj> for Rbool

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type Error = Error

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impl TryFrom<Robj> for Rcplx

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type Error = Error

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impl TryFrom<Robj> for Rfloat

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type Error = Error

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impl TryFrom<Robj> for Rint

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type Error = Error

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impl TryFrom<Robj> for Altrep

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type Error = Error

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impl TryFrom<Robj> for Complexes

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type Error = Error

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impl TryFrom<Robj> for Doubles

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type Error = Error

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impl TryFrom<Robj> for Environment

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type Error = Error

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impl TryFrom<Robj> for Expressions

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type Error = Error

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impl TryFrom<Robj> for Function

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type Error = Error

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impl TryFrom<Robj> for Integers

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type Error = Error

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impl TryFrom<Robj> for Language

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type Error = Error

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impl TryFrom<Robj> for List

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type Error = Error

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impl TryFrom<Robj> for ListIter

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type Error = Error

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impl TryFrom<Robj> for Logicals

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type Error = Error

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impl TryFrom<Robj> for Pairlist

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type Error = Error

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impl TryFrom<Robj> for Primitive

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type Error = Error

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impl TryFrom<Robj> for Promise

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type Error = Error

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impl TryFrom<Robj> for Raw

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type Error = Error

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impl TryFrom<Robj> for Rstr

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type Error = Error

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impl TryFrom<Robj> for S4

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type Error = Error

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impl TryFrom<Robj> for Strings

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type Error = Error

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impl TryFrom<Robj> for Symbol

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type Error = Error

1.72.0 · source§

impl<'a> TryFrom<&'a OsStr> for &'a str

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impl<'a> TryFrom<&Robj> for MatRef<'a, f64>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, f64>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, i32>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, u32>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, Rbool>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, Rcplx>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, Rfloat>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, Rint>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, Rstr>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView1<'a, c64>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, f64>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, i32>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, u32>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, Rbool>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, Rcplx>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, Rfloat>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, Rint>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, Rstr>

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type Error = Error

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impl<'a> TryFrom<&Robj> for ArrayView2<'a, c64>

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type Error = Error

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impl<'a> TryFrom<Robj> for MatRef<'a, f64>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, f64>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, i32>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, u32>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, Rbool>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, Rcplx>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, Rfloat>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, Rint>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, Rstr>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView1<'a, c64>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, f64>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, i32>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, u32>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, Rbool>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, Rcplx>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, Rfloat>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, Rint>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, Rstr>

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type Error = Error

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impl<'a> TryFrom<Robj> for ArrayView2<'a, c64>

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type Error = Error

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impl<'a, Din, Dout> TryFrom<&'a [SliceInfoElem]> for SliceInfo<&'a [SliceInfoElem], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<'a, L, R> TryFrom<&'a Robj> for Either<L, R>
where L: TryFrom<&'a Robj, Error = Error>, R: TryFrom<&'a Robj, Error = Error>,

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type Error = Error

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impl<'a, T> TryFrom<&'a Robj> for Nullable<T>
where T: TryFrom<&'a Robj, Error = Error>,

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type Error = Error

1.34.0 · source§

impl<'a, T, const N: usize> TryFrom<&'a [T]> for &'a [T; N]

Tries to create an array ref &[T; N] from a slice ref &[T]. Succeeds if slice.len() == N.

let bytes: [u8; 3] = [1, 0, 2];

let bytes_head: &[u8; 2] = <&[u8; 2]>::try_from(&bytes[0..2]).unwrap();
assert_eq!(1, u16::from_le_bytes(*bytes_head));

let bytes_tail: &[u8; 2] = bytes[1..3].try_into().unwrap();
assert_eq!(512, u16::from_le_bytes(*bytes_tail));
1.34.0 · source§

impl<'a, T, const N: usize> TryFrom<&'a mut [T]> for &'a mut [T; N]

Tries to create a mutable array ref &mut [T; N] from a mutable slice ref &mut [T]. Succeeds if slice.len() == N.

let mut bytes: [u8; 3] = [1, 0, 2];

let bytes_head: &mut [u8; 2] = <&mut [u8; 2]>::try_from(&mut bytes[0..2]).unwrap();
assert_eq!(1, u16::from_le_bytes(*bytes_head));

let bytes_tail: &mut [u8; 2] = (&mut bytes[1..3]).try_into().unwrap();
assert_eq!(512, u16::from_le_bytes(*bytes_tail));
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impl<A, S, D> TryFrom<&ArrayBase<S, D>> for Robj
where S: Data<Elem = A>, A: Copy + ToVectorValue, D: Dimension,

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type Error = Error

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impl<A, S, D> TryFrom<ArrayBase<S, D>> for Robj
where S: Data<Elem = A>, A: Copy + ToVectorValue, D: Dimension,

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type Error = Error

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impl<Din, Dout> TryFrom<Vec<SliceInfoElem>> for SliceInfo<Vec<SliceInfoElem>, Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 0]> for SliceInfo<[SliceInfoElem; 0], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 1]> for SliceInfo<[SliceInfoElem; 1], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 2]> for SliceInfo<[SliceInfoElem; 2], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 3]> for SliceInfo<[SliceInfoElem; 3], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 4]> for SliceInfo<[SliceInfoElem; 4], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 5]> for SliceInfo<[SliceInfoElem; 5], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 6]> for SliceInfo<[SliceInfoElem; 6], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 7]> for SliceInfo<[SliceInfoElem; 7], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<Din, Dout> TryFrom<[SliceInfoElem; 8]> for SliceInfo<[SliceInfoElem; 8], Din, Dout>
where Din: Dimension, Dout: Dimension,

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impl<L, R> TryFrom<Robj> for Either<L, R>
where for<'a> Either<L, R>: TryFrom<&'a Robj, Error = Error>,

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type Error = Error

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impl<T> TryFrom<&Robj> for &ExternalPtr<T>

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type Error = Error

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impl<T> TryFrom<&Robj> for Option<RColumn<T>>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<&Robj> for Option<RMatrix3D<T>>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<&Robj> for Option<RMatrix<T>>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<&Robj> for Dataframe<T>

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type Error = Error

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impl<T> TryFrom<&Robj> for ExternalPtr<T>

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type Error = Error

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impl<T> TryFrom<&Robj> for FromList<Vec<T>>
where T: TryFrom<Robj>, <T as TryFrom<Robj>>::Error: Into<Error>,

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type Error = Error

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impl<T> TryFrom<&Robj> for RColumn<T>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<&Robj> for RMatrix3D<T>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<&Robj> for RMatrix<T>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<&mut Robj> for &mut ExternalPtr<T>

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type Error = Error

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impl<T> TryFrom<Robj> for Option<RColumn<T>>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<Robj> for Option<RMatrix3D<T>>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<Robj> for Option<RMatrix<T>>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<Robj> for Nullable<T>
where T: TryFrom<Robj, Error = Error>,

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type Error = Error

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impl<T> TryFrom<Robj> for Dataframe<T>

§

type Error = Error

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impl<T> TryFrom<Robj> for ExternalPtr<T>

§

type Error = Error

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impl<T> TryFrom<Robj> for FromList<Vec<T>>
where T: TryFrom<Robj>, <T as TryFrom<Robj>>::Error: Into<Error>,

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type Error = Error

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impl<T> TryFrom<Robj> for RColumn<T>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<Robj> for RMatrix3D<T>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

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impl<T> TryFrom<Robj> for RMatrix<T>
where Robj: for<'a> AsTypedSlice<'a, T>,

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type Error = Error

1.43.0 · source§

impl<T, A, const N: usize> TryFrom<Rc<[T], A>> for Rc<[T; N], A>
where A: Allocator,

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type Error = Rc<[T], A>

1.43.0 · source§

impl<T, A, const N: usize> TryFrom<Arc<[T], A>> for Arc<[T; N], A>
where A: Allocator,

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type Error = Arc<[T], A>

1.48.0 · source§

impl<T, A, const N: usize> TryFrom<Vec<T, A>> for [T; N]
where A: Allocator,

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type Error = Vec<T, A>

1.34.0 · source§

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

1.34.0 · source§

impl<T, const N: usize> TryFrom<&[T]> for [T; N]
where T: Copy,

Tries to create an array [T; N] by copying from a slice &[T]. Succeeds if slice.len() == N.

let bytes: [u8; 3] = [1, 0, 2];

let bytes_head: [u8; 2] = <[u8; 2]>::try_from(&bytes[0..2]).unwrap();
assert_eq!(1, u16::from_le_bytes(bytes_head));

let bytes_tail: [u8; 2] = bytes[1..3].try_into().unwrap();
assert_eq!(512, u16::from_le_bytes(bytes_tail));
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impl<T, const N: usize> TryFrom<&[T]> for Simd<T, N>

1.59.0 · source§

impl<T, const N: usize> TryFrom<&mut [T]> for [T; N]
where T: Copy,

Tries to create an array [T; N] by copying from a mutable slice &mut [T]. Succeeds if slice.len() == N.

let mut bytes: [u8; 3] = [1, 0, 2];

let bytes_head: [u8; 2] = <[u8; 2]>::try_from(&mut bytes[0..2]).unwrap();
assert_eq!(1, u16::from_le_bytes(bytes_head));

let bytes_tail: [u8; 2] = (&mut bytes[1..3]).try_into().unwrap();
assert_eq!(512, u16::from_le_bytes(bytes_tail));
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impl<T, const N: usize> TryFrom<&mut [T]> for Simd<T, N>

1.43.0 · source§

impl<T, const N: usize> TryFrom<Box<[T]>> for Box<[T; N]>

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type Error = Box<[T]>

1.66.0 · source§

impl<T, const N: usize> TryFrom<Vec<T>> for Box<[T; N]>

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type Error = Vec<T>