Struct Span 

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

Utility type for carrying source-location metadata.

Fields

start: usize

Byte offset of the first character.

end: usize

Byte offset one past the last character.

line: u32

1-based line number of the start.

column: u32

1-based column number of the start.

Implementations

impl Span

pub fn new(start: usize, end: usize, line: u32, column: u32) -> Self

Create a new span.

pub fn dummy() -> Self

Create a dummy span (all zeros).

pub fn len(&self) -> usize

Return the length in bytes.

pub fn is_empty(&self) -> bool

Return true if the span covers zero bytes.

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

Merge two spans: from the earlier start to the later end.

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 Debug for Span

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

Formats the value using the given formatter.

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 Eq for Span

impl StructuralPartialEq for Span