Struct Span

#[repr(C)]
pub struct Span {
    pub start: usize,
    pub end: usize,
    pub line: usize,
}

A half-open range which indicates the location of something in a body of text.

Fields

start: usize

The byte index corresponding to the item’s start.

end: usize

The index one byte past the item’s end.

line: usize

The (zero-based) line number.

Implementations

impl Span

pub const PLACEHOLDER: Span

A placeholder Span which will be ignored by Span::merge() and equality checks.

pub const fn new(start: usize, end: usize, line: usize) -> Self

Create a new Span.

pub fn get_text<'input>(&self, src: &'input str) -> Option<&'input str>

Get the string this Span corresponds to.

Passing in a different string will probably lead to… strange… results.

pub fn merge(self, other: Span) -> Span

Merge two Spans, making sure Span::PLACEHOLDER spans go away.

pub fn is_placeholder(self) -> bool

Is this a Span::PLACEHOLDER?

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Span

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

Formats the value using the given formatter.

impl Default for Span

fn default() -> Span

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Span

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Span> for Range<usize>

fn from(other: Span) -> Range<usize>

Converts to this type from the input type.

impl PartialEq for Span

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Span

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Span

impl Eq for Span