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

Indexes content in a separate string.

Fields of Borrowed

start: usize

Byte offset of the beginning of the span (inclusive)

end: usize

Byte offset of the end of the span (exclusive)

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_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>

pub fn as_ref(&self) -> &IndexedCow

Performs the conversion.

impl Clone for IndexedCow

pub fn clone(&self) -> IndexedCow

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for IndexedCow

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

Formats the value using the given formatter.

impl Eq for IndexedCow

impl Hash for IndexedCow

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl PartialEq<IndexedCow> for IndexedCow

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

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

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

This method tests for !=.

impl StructuralEq for IndexedCow

impl StructuralPartialEq for IndexedCow