pub struct SmallCharSet {
    pub bits: u64,
}
Expand description

Represents a set of “small characters”, those with Unicode scalar values less than 64.

This is stored as a bitmap, with 1 bit for each value.

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§bits: u64

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impl SmallCharSet

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fn contains(&self, n: u8) -> bool

Checks whether a character (u8 value below 64) is stored in the SmallCharSet.

Examples
let set = SmallCharSet {
    bits: 0b00000000_01000000_00000100_00000000_00000000_00000000_00010000_00000000
};
assert!(set.contains(64));
assert!(set.contains(b'6')); // `b'6'` is the same as 64u8
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pub fn nonmember_prefix_len(&self, buf: &str) -> u32

Count the number of bytes of characters at the beginning of buf which are not in the set.

This functionality is used in BufferQueue::pop_except_from.

Examples
let set = small_char_set!(48 49 50); // '0' '1' '2'
// `test` is 4 chars, 😁 is 4 chars, then we meet a character in the set
let test_str = "test😁01232afd";
assert_eq!(set.nonmember_prefix_len(test_str), 8);

Trait Implementations§

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impl Clone for SmallCharSet

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fn clone(&self) -> SmallCharSet

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SmallCharSet

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

Formats the value using the given formatter. Read more
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impl Hash for SmallCharSet

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq<SmallCharSet> for SmallCharSet

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fn eq(&self, other: &SmallCharSet) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for SmallCharSet

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impl Eq for SmallCharSet

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impl StructuralEq for SmallCharSet

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impl StructuralPartialEq for SmallCharSet

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.