Enum cursive_core::utils::span::IndexedCow

pub enum IndexedCow {
    Borrowed {
        start: usize,
        end: usize,
    },
    Owned(String),
}

A span of text that can be either owned, or indexed in another String.

Variants

Borrowed

Fields

start: usize

Byte offset of the beginning of the span (inclusive)

end: usize

Byte offset of the end of the span (exclusive)

Indexes content in a separate string.

Owned(String)

Owns its content.

Implementations

impl IndexedCow

pub fn resolve<'a>(&'a self, source: &'a str) -> &'a str

Resolve the span to a string slice.

pub fn as_borrowed(&self) -> Option<(usize, usize)>

Return the (start, end) indexes if self is IndexedCow::Borrowed.

pub fn as_owned(&self) -> Option<&str>

Returns the embedded text content if self is IndexedCow::Owned.

pub fn from_str(value: &str, source: &str) -> Self

Returns an indexed view of the given string.

Note: it is assumed cow, if borrowed, is a substring of source.

pub fn from_cow(cow: Cow<'_, str>, source: &str) -> Self

Returns an indexed view of the given item.

Note: it is assumed cow, if borrowed, is a substring of source.

pub fn is_empty(&self) -> bool

Returns true if this represents an empty span.

pub fn offset(&mut self, offset: usize)

If self is borrowed, offset its indices by the given value.

Useful to update spans when concatenating sources. This span will now point to text offset further in the source.

pub fn rev_offset(&mut self, offset: usize)

If self is borrowed, offset its indices back by the given value.

Useful to update spans when removing a prefix from the source. This span will now point to text offset closer to the start of the source.

This span may become empty as a result.

Trait Implementations

impl<T> AsRef<IndexedCow> for IndexedSpan<T>

fn as_ref(&self) -> &IndexedCow

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for IndexedCow

fn clone(&self) -> IndexedCow

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IndexedCow

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

Formats the value using the given formatter.

impl Hash for IndexedCow

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<IndexedCow> for IndexedCow

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl Eq for IndexedCow

impl StructuralEq for IndexedCow

impl StructuralPartialEq for IndexedCow