Struct Span 

pub struct Span {
    pub start: Position,
    pub end: Position,
}

源代码中一段文本的位置范围

Fields

start: Position

起始位置

end: Position

结束位置

Implementations

impl Span

pub fn new(start: Position, end: Position) -> Self

创建一个新的 Span

pub fn from_offsets(start: usize, end: usize) -> Self

仅从字节偏移量创建位置范围（行列信息暂设为 0）

pub fn unknown() -> Self

创建一个表示未知位置的 Span

pub fn is_unknown(&self) -> bool

判断位置范围是否为未知

pub fn merge(spans: &[Span]) -> Self

合并多个 Span，取其最大范围

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 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 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

impl StructuralPartialEq for Span