Struct SpannedValue

pub struct SpannedValue<T> {
    pub value: T,
    pub span: Range<Span>,
}

Helper struct to hold a value and the corresponding range.

Fields

value: T

The value.

span: Range<Span>

The value’s span.

Implementations

impl<T> SpannedValue<T>

pub fn value(self) -> T

The value.

pub fn span(&self) -> Range<Span>

The value’s span.

pub fn map_value<I>(self, map: impl FnOnce(T) -> I) -> SpannedValue<I>

Map the value to a new type, keeping the span.

pub fn from_to_tokens(value: T) -> Self

where T: ToTokens,

Creates a new SpannedValue from a value implementing ToTokens.

pub fn new(value: T, span: impl SpanRanged) -> SpannedValue<T>

Creates a new SpannedValue from a value and a span.

pub fn call_site(value: T) -> SpannedValue<T>

Creates a new SpannedValue with the span Span::call_site().

Trait Implementations

impl<T: Debug> Debug for SpannedValue<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for SpannedValue<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T> SpanRanged for SpannedValue<T>

fn span_range(&self) -> Range<Span>

Returns the Range<Span> fully encompasing self

fn span_joined(&self) -> Option<Span>

Returns Self::span_range as a single span if possible, currently only possible on nightly. more