Crate standback[−][src]
Standback backports a number of methods, structs, and macros that have been stabilized in the Rust standard library since 1.31.0. This allows crate authors to depend on Standback rather than forcing downstream users to upgrade their compiler (or not use the new feature at all).
Due to a variety of restrictions in the Rust, it is not possible to implement everything that has been stabilized.
Usage
If you are using methods on already-existing structs, you should use the following:
use standback::prelude::*;
Additionally, if you are using newly stabilized structs, types, or anything
else that would normally have to be imported, use standback instead of
std:
use standback::mem::take;
It is highly recommended to use #![allow(unstable_name_collisions)], as
that’s the whole point of this crate. Just be extra-careful to not do it for
anything that can’t be backported.
#![no_std] support
By default, there standard library is used where necessary. If support for
#![no_std] is required, use default-features = false.
An allocator is not required for any backported item. If any require an
allocator in the future, it will be gated under an alloc feature.
Methods on existing structs
The following methods and constants are available via the prelude:
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// 1.43 f32::RADIX f32::MANTISSA_DIGITS f32::DIGITS f32::EPSILON f32::MIN f32::MIN_POSITIVE f32::MAX f32::MIN_EXP f32::MAX_EXP f32::MIN_10_EXP f32::MAX_10_EXP f32::NAN f32::INFINITY f32::NEG_INFINITY f64::RADIX f64::MANTISSA_DIGITS f64::DIGITS f64::EPSILON f64::MIN f64::MIN_POSITIVE f64::MAX f64::MIN_EXP f64::MAX_EXP f64::MIN_10_EXP f64::MAX_10_EXP f64::NAN f64::INFINITY f64::NEG_INFINITY u8::MIN u8::MAX u16::MIN u16::MAX u32::MIN u32::MAX u64::MIN u64::MAX u128::MIN u128::MAX usize::MIN usize::MAX i8::MIN i8::MAX i16::MIN i16::MAX i32::MIN i32::MAX i64::MIN i64::MAX i128::MIN i128::MAX isize::MIN isize::MAX // 1.42 CondVar::wait_while CondVar::wait_timeout_while ManuallyDrop::take // 1.41 Result::map_or Result::map_or_else // 1.40 Option::as_deref Option::as_deref_mut f32::to_be_bytes f32::to_le_bytes f32::to_ne_bytes f64::to_be_bytes f64::to_le_bytes f64::to_ne_bytes f32::from_be_bytes f32::from_le_bytes f32::from_ne_bytes f64::from_be_bytes f64::from_le_bytes f64::from_ne_bytes slice::repeat // 1.39 // None :( // 1.38 <*const T>::cast <*mut T>::cast Duration::as_secs_f32 Duration::as_secs_f64 Duration::div_f32 Duration::div_f64 Duration::from_secs_f32 Duration::from_secs_f64 Duration::mul_f32 Duration::mul_f64 i8::rem_euclid i8::checked_rem_euclid i8::wrapping_rem_euclid i8::overflowing_rem_euclid i8::div_euclid i8::checked_div_euclid i8::wrapping_div_euclid i8::overflowing_div_euclid i16::rem_euclid i16::checked_rem_euclid i16::wrapping_rem_euclid i16::overflowing_rem_euclid i16::div_euclid i16::checked_div_euclid i16::wrapping_div_euclid i16::overflowing_div_euclid i32::rem_euclid i32::checked_rem_euclid i32::wrapping_rem_euclid i32::overflowing_rem_euclid i32::div_euclid i32::checked_div_euclid i32::wrapping_div_euclid i32::overflowing_div_euclid i64::rem_euclid i64::checked_rem_euclid i64::wrapping_rem_euclid i64::overflowing_rem_euclid i64::div_euclid i64::checked_div_euclid i64::wrapping_div_euclid i64::overflowing_div_euclid i128::rem_euclid i128::checked_rem_euclid i128::wrapping_rem_euclid i128::overflowing_rem_euclid i128::div_euclid i128::checked_div_euclid i128::wrapping_div_euclid i128::overflowing_div_euclid isize::rem_euclid isize::checked_rem_euclid isize::wrapping_rem_euclid isize::overflowing_rem_euclid isize::div_euclid isize::checked_div_euclid isize::wrapping_div_euclid isize::overflowing_div_euclid u8::rem_euclid u8::checked_rem_euclid u8::wrapping_rem_euclid u8::overflowing_rem_euclid u8::div_euclid u8::checked_div_euclid u8::wrapping_div_euclid u8::overflowing_div_euclid u16::rem_euclid u16::checked_rem_euclid u16::wrapping_rem_euclid u16::overflowing_rem_euclid u16::div_euclid u16::checked_div_euclid u16::wrapping_div_euclid u16::overflowing_div_euclid u32::rem_euclid u32::checked_rem_euclid u32::wrapping_rem_euclid u32::overflowing_rem_euclid u32::div_euclid u32::checked_div_euclid u32::wrapping_div_euclid u32::overflowing_div_euclid u64::rem_euclid u64::checked_rem_euclid u64::wrapping_rem_euclid u64::overflowing_rem_euclid u64::div_euclid u64::checked_div_euclid u64::wrapping_div_euclid u64::overflowing_div_euclid u128::rem_euclid u128::checked_rem_euclid u128::wrapping_rem_euclid u128::overflowing_rem_euclid u128::div_euclid u128::checked_div_euclid u128::wrapping_div_euclid u128::overflowing_div_euclid usize::rem_euclid usize::checked_rem_euclid usize::wrapping_rem_euclid usize::overflowing_rem_euclid usize::div_euclid usize::checked_div_euclid usize::wrapping_div_euclid usize::overflowing_div_euclid f32::rem_euclid f32::div_euclid f64::rem_euclid f64::div_euclid // 1.37 Cell::from_mut Cell<[T]>::as_slice_of_cells DoubleEndedIterator::nth_back Option::xor slice::copy_within // 1.36 Iterator::copied mem::MaybeUninit task::Context task::RawWaker task::RawWakerVTable task::Waker task::Poll // 1.35 RefCell::replace_with ptr::hash Range::contains RangeFrom::contains RangeTo::contains RangeInclusive::contains RangeToInclusive::contains Option::copied // 1.34 slice::sort_by_cached_key i8::checked_pow i8::saturating_pow i8::wrapping_pow i8::overflowing_pow i16::checked_pow i16::saturating_pow i16::wrapping_pow i16::overflowing_pow i32::checked_pow i32::saturating_pow i32::wrapping_pow i32::overflowing_pow i64::checked_pow i64::saturating_pow i64::wrapping_pow i64::overflowing_pow i128::checked_pow i128::saturating_pow i128::wrapping_pow i128::overflowing_pow isize::checked_pow isize::saturating_pow isize::wrapping_pow isize::overflowing_pow u8::checked_pow u8::saturating_pow u8::wrapping_pow u8::overflowing_pow u16::checked_pow u16::saturating_pow u16::wrapping_pow u16::overflowing_pow u32::checked_pow u32::saturating_pow u32::wrapping_pow u32::overflowing_pow u64::checked_pow u64::saturating_pow u64::wrapping_pow u64::overflowing_pow u128::checked_pow u128::saturating_pow u128::wrapping_pow u128::overflowing_pow usize::checked_pow usize::saturating_pow usize::wrapping_pow usize::overflowing_pow // 1.33 os::unix::fs::FileExt::read_exact_at os::unix::fs::FileExt::write_all_at Option::transpose Result::transpose VecDeque::resize_with Duration::as_millis Duration::as_micros Duration::as_nanos // 1.32 i8::to_be_bytes i8::to_le_bytes i8::to_ne_bytes i8::from_be_bytes i8::from_le_bytes i8::from_ne_bytes i16::to_be_bytes i16::to_le_bytes i16::to_ne_bytes i16::from_be_bytes i16::from_le_bytes i16::from_ne_bytes i32::to_be_bytes i32::to_le_bytes i32::to_ne_bytes i32::from_be_bytes i32::from_le_bytes i32::from_ne_bytes i64::to_be_bytes i64::to_le_bytes i64::to_ne_bytes i64::from_be_bytes i64::from_le_bytes i64::from_ne_bytes i128::to_be_bytes i128::to_le_bytes i128::to_ne_bytes i128::from_be_bytes i128::from_le_bytes i128::from_ne_bytes isize::to_be_bytes isize::to_le_bytes isize::to_ne_bytes isize::from_be_bytes isize::from_le_bytes isize::from_ne_bytes u8::to_be_bytes u8::to_le_bytes u8::to_ne_bytes u8::from_be_bytes u8::from_le_bytes u8::from_ne_bytes u16::to_be_bytes u16::to_le_bytes u16::to_ne_bytes u16::from_be_bytes u16::from_le_bytes u16::from_ne_bytes u32::to_be_bytes u32::to_le_bytes u32::to_ne_bytes u32::from_be_bytes u32::from_le_bytes u32::from_ne_bytes u64::to_be_bytes u64::to_le_bytes u64::to_ne_bytes u64::from_be_bytes u64::from_le_bytes u64::from_ne_bytes u128::to_be_bytes u128::to_le_bytes u128::to_ne_bytes u128::from_be_bytes u128::from_le_bytes u128::from_ne_bytes usize::to_be_bytes usize::to_le_bytes usize::to_ne_bytes usize::from_be_bytes usize::from_le_bytes usize::from_ne_bytes
Other APIs implemented
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primitive // 1.43 — requires rustc 1.32.0 f32::LOG10_2 // 1.43 f32::LOG2_10 // 1.43 f64::LOG10_2 // 1.43 f64::LOG2_10 // 1.43 iter::once_with // 1.43 mem::take // 1.40 iterator::Copied // 1.36 array::TryFromSliceError // 1.36 iter::from_fn // 1.34 iter::successors // 1.34 convert::TryFrom // 1.34 convert::TryInto // 1.34 num::TryFromIntError // 1.34 convert::identity // 1.33 pin::Pin // 1.33 marker::Unpin // 1.33
Macros
Macros should not be imported directly, but rather through the prelude.
ⓘ
todo! // 1.39 matches! // 1.42
Modules
| array | |
| convert | |
| f32 | |
| f64 | |
| iter | |
| marker | |
| mem | |
| num | |
| pin | |
| prelude | |
| ptr | |
| task |
Traits
| Float | |
| Integer | |
| Sealed |