[−][src]Struct abi_stable::std_types::str::RStr
Ffi-safe equivalent of &'a str
Example
This defines a function that returns the first word in a string.
use abi_stable::{ std_types::RStr, sabi_extern_fn, }; #[sabi_extern_fn] fn first_word(phrase:RStr<'_>)->RStr<'_>{ match phrase.as_str().split_whitespace().next() { Some(x)=>x.into(), None=>"".into() } }
Methods
impl<'a> RStr<'a>
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impl<'a> RStr<'a>
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pub const fn empty() -> Self
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Constructs an empty RStr<'a>
.
Example
use abi_stable::std_types::RStr; const STR:RStr<'static>=RStr::empty(); assert_eq!(STR,RStr::from(""));
pub const unsafe fn from_raw_parts(ptr_: *const u8, len: usize) -> Self
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Constructs an RStr<'a>
from a pointer to the first byte,
and a length.
Safety
Callers must ensure that:
-
ptr_ points to valid memory,
-
ptr_ .. ptr+len
range is accessible memory,and is valid utf-8. -
the data ptr_ points to must be valid for the lifetime of this
RStr<'a>
Examples
This function unsafely converts a &str
to an RStr<'_>
,
equivalent to doing RStr::from
.
use abi_stable::std_types::RStr; fn convert(slice_:&str)->RStr<'_>{ unsafe{ RStr::from_raw_parts( slice_.as_ptr(), slice_.len() ) } }
pub fn from_str(s: &'a str) -> Self
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Converts &'a str
to a RStr<'a>
.
Constness
This function is a const fn
from Rust 1.39 onwards due to
the stabilization of str::len
.
Before Rust 1.39 the only safe way to construct an RStr<'static>
constant is using rstr!("...")
with a string literal argument.
Example
use abi_stable::std_types::RStr; assert_eq!(RStr::from_str("").as_str(), ""); assert_eq!(RStr::from_str("Hello").as_str(), "Hello"); assert_eq!(RStr::from_str("World").as_str(), "World");
pub fn slice<I>(&self, i: I) -> RStr<'a> where
str: Index<I, Output = str>,
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str: Index<I, Output = str>,
For slicing RStr
s.
This is an inherent method instead of an implementation of the ::std::ops::Index trait because it does not return a reference.
Example
use abi_stable::std_types::RStr; let str=RStr::from("What is that."); assert_eq!(str.slice(..),str); assert_eq!(str.slice(..4),RStr::from("What")); assert_eq!(str.slice(4..),RStr::from(" is that.")); assert_eq!(str.slice(4..7),RStr::from(" is"));
pub const fn as_rslice(&self) -> RSlice<'a, u8>
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Accesses the underlying byte slice.
Example
use abi_stable::std_types::{RSlice,RStr}; let str=RStr::from("What is that."); let bytes=RSlice::from("What is that.".as_bytes()); assert_eq!(str.as_rslice(),bytes);
pub fn as_str(&self) -> &'a str
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Casts this RStr<'a>
to a &'a str
.
Example
use abi_stable::std_types::RStr; let str="What is that."; assert_eq!(RStr::from(str).as_str(),str);
pub const fn as_ptr(&self) -> *const u8
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Gets a raw pointer to the start of the string slice.
pub const fn len(&self) -> usize
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Gets the length(in bytes) of this RStr<'a>
.
Example
use abi_stable::std_types::RStr; assert_eq!(RStr::from("").len(),0); assert_eq!(RStr::from("a").len(),1); assert_eq!(RStr::from("What").len(),4);
pub const fn is_empty(&self) -> bool
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Queries whether this RStr is empty.
Example
use abi_stable::std_types::RStr; assert_eq!(RStr::from("").is_empty(),true); assert_eq!(RStr::from("a").is_empty(),false); assert_eq!(RStr::from("What").is_empty(),false);
Trait Implementations
impl<'_> AsRef<[u8]> for RStr<'_>
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impl<'_> AsRef<str> for RStr<'_>
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impl<'a> Borrow<str> for RStr<'a>
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impl<'a> Clone for RStr<'a>
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impl<'a> Copy for RStr<'a>
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impl<'a> Debug for RStr<'a>
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impl<'a> Default for RStr<'a>
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impl<'a> Deref for RStr<'a>
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impl<'de> Deserialize<'de> for RStr<'de>
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where
D: Deserializer<'de>,
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D: Deserializer<'de>,
impl<'_> Display for RStr<'_>
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impl<'a> Eq for RStr<'a>
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impl<'a> From<&'a str> for RStr<'a>
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impl<'a> From<RStr<'a>> for RCow<'a, str>
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impl<'a> GetStaticEquivalent_ for RStr<'a>
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type StaticEquivalent = _static_RStr<'static>
impl<'a> Hash for RStr<'a>
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl<'a> Into<&'a str> for RStr<'a>
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impl<'a> Into<Cow<'a, str>> for RStr<'a>
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impl<'a> Into<RString> for RStr<'a>
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impl<'a> Into<String> for RStr<'a>
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impl<'a> IntoReprRust for RStr<'a>
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impl<'a> Ord for RStr<'a>
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fn cmp(&self, other: &Self) -> Ordering
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fn max(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
1.21.0[src]
fn clamp(self, min: Self, max: Self) -> Self
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impl<'a> PartialEq<RStr<'a>> for RStr<'a>
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impl<'a> PartialOrd<RStr<'a>> for RStr<'a>
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fn partial_cmp(&self, other: &Self) -> Option<Ordering>
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#[must_use]
fn lt(&self, other: &Rhs) -> bool
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#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
impl<'a> Send for RStr<'a>
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impl<'a> Serialize for RStr<'a>
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impl<'a> SharedStableAbi for RStr<'a>
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type IsNonZeroType = False
Whether this type has a single invalid bit-pattern. Read more
type Kind = __ValueKind
The kind of abi stability of this type,there are 2: Read more
const S_LAYOUT: &'static TypeLayout
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const S_ABI_CONSTS: AbiConsts
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impl<'a> Sync for RStr<'a>
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Auto Trait Implementations
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<'a, T> BorrowOwned<'a> for T where
T: 'a + Clone,
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T: 'a + Clone,
type ROwned = T
type RBorrowed = &'a T
fn r_borrow(
&'a <T as BorrowOwned<'a>>::ROwned
) -> <T as BorrowOwned<'a>>::RBorrowed
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&'a <T as BorrowOwned<'a>>::ROwned
) -> <T as BorrowOwned<'a>>::RBorrowed
fn r_to_owned(
<T as BorrowOwned<'a>>::RBorrowed
) -> <T as BorrowOwned<'a>>::ROwned
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<T as BorrowOwned<'a>>::RBorrowed
) -> <T as BorrowOwned<'a>>::ROwned
fn deref_borrowed(&<T as BorrowOwned<'a>>::RBorrowed) -> &T
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fn deref_owned(&<T as BorrowOwned<'a>>::ROwned) -> &T
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fn from_cow_borrow(&'a T) -> <T as BorrowOwned<'a>>::RBorrowed
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fn from_cow_owned(<T as ToOwned>::Owned) -> <T as BorrowOwned<'a>>::ROwned
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fn into_cow_borrow(<T as BorrowOwned<'a>>::RBorrowed) -> &'a T
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fn into_cow_owned(<T as BorrowOwned<'a>>::ROwned) -> <T as ToOwned>::Owned
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impl<T> From<T> for T
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impl<This> GetConstGenericVTable for This where
This: StableAbi + Eq + PartialEq<This> + Debug + Send + Sync,
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This: StableAbi + Eq + PartialEq<This> + Debug + Send + Sync,
const VTABLE: ConstGenericVTableFor<This>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> SelfOps for T where
T: ?Sized,
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T: ?Sized,
const T: PhantomData<fn() -> Self>
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const T_D: PhantomData<Self>
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fn assert_ty(self, _other: PhantomData<fn() -> Self>) -> Self
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fn assert_ty_ref(&self, _other: PhantomData<fn() -> Self>) -> &Self
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fn assert_ty_mut(&mut self, _other: PhantomData<fn() -> Self>) -> &mut Self
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fn ty_(&self) -> PhantomData<fn() -> Self>
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fn ty_d(&self) -> PhantomData<Self>
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fn ty_inv(&self) -> PhantomData<fn(Self) -> Self>
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fn ty_inv_ref(&self) -> PhantomData<Cell<&Self>>
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fn eq_id(&self, other: &Self) -> bool
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fn piped<F, U>(self, f: F) -> U where
F: FnOnce(Self) -> U,
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F: FnOnce(Self) -> U,
fn piped_ref<'a, F, U>(&'a self, f: F) -> U where
F: FnOnce(&'a Self) -> U,
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F: FnOnce(&'a Self) -> U,
fn piped_mut<'a, F, U>(&'a mut self, f: F) -> U where
F: FnOnce(&'a mut Self) -> U,
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F: FnOnce(&'a mut Self) -> U,
fn mutated<F>(self, f: F) -> Self where
F: FnOnce(&mut Self),
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F: FnOnce(&mut Self),
fn observe<F>(self, f: F) -> Self where
F: FnOnce(&Self),
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F: FnOnce(&Self),
fn into_<T>(self, PhantomData<fn() -> T>) -> T where
Self: Into<T>,
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Self: Into<T>,
fn as_ref_<T>(&self) -> &T where
Self: AsRef<T>,
T: ?Sized,
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Self: AsRef<T>,
T: ?Sized,
fn as_mut_<T>(&mut self) -> &mut T where
Self: AsMut<T>,
T: ?Sized,
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Self: AsMut<T>,
T: ?Sized,
fn drop_(self)
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impl<This> StableAbi for This where
This: SharedStableAbi<Kind = ValueKind>,
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This: SharedStableAbi<Kind = ValueKind>,
const LAYOUT: &'static TypeLayout
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const ABI_CONSTS: AbiConsts
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impl<T> StringExt for T where
T: Borrow<str> + ?Sized,
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T: Borrow<str> + ?Sized,
fn previous_char_boundary(&self, index: usize) -> usize
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fn next_char_boundary(&self, index: usize) -> usize
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fn left_char_boundary(&self, index: usize) -> usize
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fn right_char_boundary(&self, index: usize) -> usize
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fn get_offset_inside_of(&self, parent: &str) -> Option<usize>
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fn offset_inside_of(&self, parent: &str) -> usize
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fn is_substring_of(&self, parent: &str) -> bool
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fn split_while<P, T>(&'a self, mapper: P) -> SplitWhile<'a, P, T> where
P: FnMut(char) -> T,
T: Clone + Eq,
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P: FnMut(char) -> T,
T: Clone + Eq,
fn rsplit_while<P, T>(&'a self, mapper: P) -> RSplitWhile<'a, P, T> where
P: FnMut(char) -> T,
T: Clone + Eq,
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P: FnMut(char) -> T,
T: Clone + Eq,
fn get_nth_char_index(&self, n: usize) -> Option<usize>
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fn nth_char_index(&self, n: usize) -> usize
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fn nth_char(&self, n: usize) -> Option<char>
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fn first_chars(&self, n: usize) -> &str
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fn last_chars(&self, n: usize) -> &str
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fn from_nth_char(&self, n: usize) -> &str
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fn calc_len_utf16(&self) -> usize
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fn get_char_at(&self, at_byte: usize) -> Option<char>
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fn char_indices_to(&self, to: usize) -> CharIndices
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fn char_indices_from(&self, from: usize) -> CharIndicesFrom
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fn left_pad(&self, how_much: usize) -> String
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fn left_padder(&'a self, how_much: usize) -> LeftPadder<'a>
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fn line_indentation(&self) -> usize
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fn min_indentation(&self) -> usize
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fn max_indentation(&self) -> usize
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<This> TransmuteElement for This where
This: ?Sized,
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This: ?Sized,
unsafe fn transmute_element<T>(self) -> Self::TransmutedPtr where
Self: CanTransmuteElement<T>,
Self::Target: Sized,
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Self: CanTransmuteElement<T>,
Self::Target: Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The error type returned when the conversion fails.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> TypeIdentity for T where
T: ?Sized,
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T: ?Sized,
type Type = T
The same type as Self. Read more
fn into_type_val(self) -> Self::Type where
Self::Type: Sized,
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Self::Type: Sized,
fn into_type_ref(&self) -> &Self::Type
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fn into_type_mut(&mut self) -> &mut Self::Type
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fn into_type_box(self: Box<Self>) -> Box<Self::Type>
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fn into_type_arc(this: Arc<Self>) -> Arc<Self::Type>
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fn into_type_rc(this: Rc<Self>) -> Rc<Self::Type>
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fn from_type_val(this: Self::Type) -> Self where
Self::Type: Sized,
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Self::Type: Sized,