[−][src]Struct pstr::MowStr
Mutable on Write Interning String
It will be auto switch to mutable when do modify operate
Can call .intern()
to save into intern pool
Example
let mut s = MowStr::new("hello"); assert!(s.is_interned()); s.push_str(" "); assert!(s.is_mutable()); s.mutdown().push_str("world"); assert_eq!(s, "hello world"); s.intern(); assert!(s.is_interned());
Implementations
impl MowStr
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pub fn new(s: impl AsRef<str>) -> Self
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pub fn new_mut(s: impl Into<String>) -> Self
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Create a MowStr
from str slice with mutable
Example
let s = MowStr::new_mut("hello world"); assert!(s.is_mutable());
pub fn mut_empty() -> Self
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Create a new empty MowStr
with mutable
Example
let s = MowStr::mut_empty(); assert!(s.is_mutable());
pub fn mut_with_capacity(capacity: usize) -> Self
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Create a new empty MowStr
with a particular capacity and mutable
pub fn from_string(s: String) -> Self
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Create a MowStr
from String
pub fn from_string_mut(s: String) -> Self
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Create a MowStr
from String
with mutable
pub fn from_boxed(s: Box<str>) -> Self
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Create a MowStr
from Box<str>
pub fn from_arc(s: Arc<str>) -> Self
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Create a MowStr
from Arc<str>
pub fn from_rc(s: Rc<str>) -> Self
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Create a MowStr
from Rc<str>
pub fn from_istr(s: IStr) -> Self
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Create a MowStr
from IStr
pub fn from_to_arc<S: AsRef<str>>(
s: S,
to_arc: impl FnOnce(S) -> Arc<str>
) -> Self
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s: S,
to_arc: impl FnOnce(S) -> Arc<str>
) -> Self
Create a MowStr
from custom fn
impl MowStr
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pub fn intern(&mut self)
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Save the current state to the intern pool
Do nothing if already in the pool
pub fn to_mut(&mut self)
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Get a mutable clone of the string on the pool
Do nothing if already mutable
pub fn mutdown(&mut self) -> &mut String
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Switch to mutable and return a mutable reference
pub fn to_mut_by(&mut self, f: impl FnOnce(&mut IStr) -> String)
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Do nothing if already mutable
pub fn swap_mut(&mut self, s: String) -> Option<String>
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Swap internal String
Return None
if self is interned
pub fn try_swap_mut(&mut self, s: String) -> Option<String>
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Swap internal String when self is mutable
Do nothing if self is interned
Return None
if self is interned
pub fn is_interned(&self) -> bool
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Check if it is in intern pool
pub fn is_mutable(&self) -> bool
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Check if it is mutable
impl MowStr
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pub fn ref_str(&self) -> &str
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Get &str
pub fn mut_str(&mut self) -> &mut str
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Get &mut str
pub fn mut_string(&mut self) -> &mut String
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Get &mut String
pub fn as_str(&self) -> &str
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Extracts a string slice containing the entire MowStr
pub fn as_mut_str(&mut self) -> &mut str
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Switch to mutable and returns a mutable string slice.
pub fn as_mut_string(&mut self) -> &mut String
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Switch to mutable and returns a mutable String
reference
pub unsafe fn as_mut_vec(&mut self) -> &mut Vec<u8>
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Switch to mutable and returns a mutable Vec<u8>
reference
pub fn into_string(self) -> String
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Convert to String
pub fn into_boxed_str(self) -> Box<str>
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Convert to Box<str>
impl MowStr
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pub fn push_str(&mut self, string: impl AsRef<str>)
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Appends a given string slice onto the end of this MowStr
pub fn reserve(&mut self, additional: usize)
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Ensures that this MowStr
's capacity is at least additional
bytes larger than its length.
The capacity may be increased by more than additional
bytes if it chooses, to prevent frequent reallocations.
If you do not want this "at least" behavior, see the reserve_exact
method.
Panics
Panics if the new capacity overflows usize
.
pub fn reserve_exact(&mut self, additional: usize)
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Ensures that this MowStr
's capacity is additional
bytes
larger than its length.
Consider using the reserve
method unless you absolutely know
better than the allocator.
Panics
Panics if the new capacity overflows usize
.
pub fn shrink_to_fit(&mut self)
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Shrinks the capacity of this MowStr
to match its length.
pub fn push(&mut self, ch: char)
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Appends the given char
to the end of this MowStr
.
pub fn truncate(&mut self, new_len: usize)
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Shortens this MowStr
to the specified length.
If new_len
is greater than the string's current length, this has no
effect.
Note that this method has no effect on the allocated capacity of the string
Panics
Panics if new_len
does not lie on a char
boundary.
pub fn pop(&mut self) -> Option<char>
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Removes the last character from the string buffer and returns it.
Returns None
if this MowStr
is empty.
pub fn remove(&mut self, idx: usize) -> char
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Removes a char
from this MowStr
at a byte position and returns it.
This is an O(n) operation, as it requires copying every element in the buffer.
Panics
Panics if idx
is larger than or equal to the MowStr
's length,
or if it does not lie on a char
boundary.
pub fn retain<F: FnMut(char) -> bool>(&mut self, f: F)
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Retains only the characters specified by the predicate.
In other words, remove all characters c
such that f(c)
returns false
.
This method operates in place, visiting each character exactly once in the
original order, and preserves the order of the retained characters.
pub fn insert(&mut self, idx: usize, ch: char)
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Inserts a character into this MowStr
at a byte position.
This is an O(n) operation as it requires copying every element in the buffer.
Panics
Panics if idx
is larger than the MowStr
's length, or if it does not
lie on a char
boundary.
pub fn insert_str(&mut self, idx: usize, string: &str)
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Inserts a string slice into this MowStr
at a byte position.
This is an O(n) operation as it requires copying every element in the buffer.
Panics
Panics if idx
is larger than the MowStr
's length, or if it does not
lie on a char
boundary.
pub fn split_off(&mut self, at: usize) -> MowStr
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Splits the string into two at the given index.
Returns a newly allocated MowStr
. self
contains bytes [0, at)
, and
the returned MowStr
contains bytes [at, len)
. at
must be on the
boundary of a UTF-8 code point.
Note that the capacity of self
does not change.
Panics
Panics if at
is not on a UTF-8
code point boundary, or if it is beyond the last
code point of the string.
pub fn clear(&mut self)
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Truncates this MowStr
, removing all contents.
While this means the MowStr
will have a length of zero, it does not
touch its capacity.
pub fn drain<R: RangeBounds<usize>>(&mut self, range: R) -> Drain<'_>
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Creates a draining iterator that removes the specified range in the MowStr
and yields the removed chars
.
Note: The element range is removed even if the iterator is not consumed until the end.
Panics
Panics if the starting point or end point do not lie on a char
boundary, or if they're out of bounds.
pub fn replace_range<R: RangeBounds<usize>>(
&mut self,
range: R,
replace_with: &str
)
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&mut self,
range: R,
replace_with: &str
)
Trait Implementations
impl<'_> Add<&'_ str> for MowStr
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type Output = MowStr
The resulting type after applying the +
operator.
fn add(self, rhs: &str) -> Self::Output
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impl<'_> AddAssign<&'_ str> for MowStr
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fn add_assign(&mut self, rhs: &str)
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impl AsMut<String> for MowStr
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impl AsMut<str> for MowStr
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impl AsRef<[u8]> for MowStr
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impl AsRef<OsStr> for MowStr
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impl AsRef<Path> for MowStr
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impl AsRef<str> for MowStr
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impl Borrow<str> for MowStr
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impl BorrowMut<str> for MowStr
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fn borrow_mut(&mut self) -> &mut str
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impl Clone for MowStr
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fn clone(&self) -> Self
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fn clone_from(&mut self, source: &Self)
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impl Debug for MowStr
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impl Deref for MowStr
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impl DerefMut for MowStr
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impl Eq for MowStr
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impl<'a> Extend<&'a char> for MowStr
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fn extend<T: IntoIterator<Item = &'a char>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl<'a> Extend<&'a str> for MowStr
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fn extend<T: IntoIterator<Item = &'a str>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl Extend<Box<str>> for MowStr
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fn extend<T: IntoIterator<Item = Box<str>>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl<'a> Extend<Cow<'a, str>> for MowStr
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fn extend<T: IntoIterator<Item = Cow<'a, str>>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl Extend<IStr> for MowStr
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fn extend<T: IntoIterator<Item = IStr>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl Extend<MowStr> for MowStr
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fn extend<T: IntoIterator<Item = MowStr>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl Extend<String> for MowStr
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fn extend<T: IntoIterator<Item = String>>(&mut self, iter: T)
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fn extend_one(&mut self, item: A)
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fn extend_reserve(&mut self, additional: usize)
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impl<'_> From<&'_ String> for MowStr
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impl<'_> From<&'_ mut str> for MowStr
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impl<'_> From<&'_ str> for MowStr
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impl<'a> From<&'a MowStr> for Cow<'a, str>
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impl From<Arc<str>> for MowStr
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impl From<Box<str>> for MowStr
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impl<'a> From<Cow<'a, str>> for MowStr
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impl From<IStr> for MowStr
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impl From<MowStr> for String
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impl From<MowStr> for Box<str>
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impl From<MowStr> for IStr
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impl From<MowStr> for Vec<u8>
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impl From<MowStr> for Arc<str>
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impl From<MowStr> for Rc<str>
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impl<'a> From<MowStr> for Cow<'a, str>
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impl From<MowStr> for Box<dyn Error>
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impl From<MowStr> for Box<dyn Error + Send + Sync>
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impl From<MowStr> for OsString
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impl From<MowStr> for PathBuf
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impl From<Rc<str>> for MowStr
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impl From<String> for MowStr
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impl From<char> for MowStr
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impl<'a> FromIterator<&'a char> for MowStr
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fn from_iter<T: IntoIterator<Item = &'a char>>(iter: T) -> Self
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impl<'a> FromIterator<&'a str> for MowStr
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fn from_iter<T: IntoIterator<Item = &'a str>>(iter: T) -> Self
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impl FromIterator<Box<str>> for MowStr
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fn from_iter<T: IntoIterator<Item = Box<str>>>(iter: T) -> Self
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impl<'a> FromIterator<Cow<'a, str>> for MowStr
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fn from_iter<T: IntoIterator<Item = Cow<'a, str>>>(iter: T) -> Self
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impl FromIterator<String> for MowStr
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fn from_iter<T: IntoIterator<Item = String>>(iter: T) -> Self
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impl FromIterator<char> for MowStr
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fn from_iter<T: IntoIterator<Item = char>>(iter: T) -> Self
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impl FromStr for MowStr
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type Err = ParseError
The associated error which can be returned from parsing.
fn from_str(s: &str) -> Result<Self, Self::Err>
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impl Hash for MowStr
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fn hash<H: Hasher>(&self, state: &mut H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<I: SliceIndex<str>> Index<I> for MowStr
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type Output = <I as SliceIndex<str>>::Output
The returned type after indexing.
fn index(&self, index: I) -> &Self::Output
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impl<I: SliceIndex<str>> IndexMut<I> for MowStr
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impl Interning for MowStr
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impl Muterning for MowStr
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impl Ord for MowStr
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fn cmp(&self, other: &MowStr) -> Ordering
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#[must_use]fn max(self, other: Self) -> Self
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#[must_use]fn min(self, other: Self) -> Self
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#[must_use]fn clamp(self, min: Self, max: Self) -> Self
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impl<'_> PartialEq<&'_ OsStr> for MowStr
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impl<'_> PartialEq<&'_ str> for MowStr
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impl PartialEq<MowStr> for MowStr
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impl PartialEq<OsStr> for MowStr
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impl PartialEq<OsString> for MowStr
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impl PartialEq<String> for MowStr
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impl PartialEq<str> for MowStr
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impl PartialOrd<MowStr> for MowStr
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fn partial_cmp(&self, other: &MowStr) -> Option<Ordering>
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fn lt(&self, other: &MowStr) -> bool
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fn le(&self, other: &MowStr) -> bool
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fn gt(&self, other: &MowStr) -> bool
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fn ge(&self, other: &MowStr) -> bool
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impl StructuralEq for MowStr
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impl StructuralPartialEq for MowStr
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impl ToSocketAddrs for MowStr
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type Iter = <str as ToSocketAddrs>::Iter
Returned iterator over socket addresses which this type may correspond to. Read more
fn to_socket_addrs(&self) -> Result<Self::Iter>
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impl ToString for MowStr
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impl Write for MowStr
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Auto Trait Implementations
impl RefUnwindSafe for MowStr
impl Send for MowStr
impl Sync for MowStr
impl Unpin for MowStr
impl UnwindSafe for MowStr
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,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub 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<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.
pub 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>,