Struct Span 

pub struct Span {
    pub start: usize,
    pub end: usize,
    pub line: u32,
    pub column: u32,
}

Position information for a lexed token.

start/end are byte offsets into the source. line is 1-indexed by \n occurrences. column is 1-indexed and counts Unicode scalar values (chars), so multibyte characters advance the column by one.

Fields

start: usize

end: usize

line: u32

column: u32

Implementations

impl Span

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

Return the slice of source that produced this token.

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Span

impl Debug for Span

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

Formats the value using the given formatter.

impl Eq for Span

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 StructuralPartialEq for Span