Struct parsel::util::SpanDisplay

pub struct SpanDisplay { /* private fields */ }

Helper type that formats a Span in a human-readable way.

#[derive(Clone, Debug, Parse)]
struct HttpHeader {
    key: Separated<Word, Token![-]>,
    colon: Token![:],
    value: TokenStream,
}

let header: HttpHeader = parsel::parse_str(r#"
    // this comment exists only so that there is a line before the actual tokens
    Content-Type: application/json
    /* another comment, just to confuse the lexer */
"#)?;

let key_span = header.key.format_span().to_string();
assert_eq!(key_span, "3:5..3:16");

let colon_span = header.colon.format_span().to_string();
assert_eq!(colon_span, "3:17..3:17");

let value_span = header.value.format_span().to_string();
assert_eq!(value_span, "3:19..3:34");

Implementations

impl SpanDisplay

pub const fn new(span: Span) -> Self

Trait Implementations

impl Clone for SpanDisplay

fn clone(&self) -> SpanDisplay

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SpanDisplay

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

Formats the value using the given formatter.

impl Display for SpanDisplay

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

Formats the value using the given formatter.

impl From<Span> for SpanDisplay

fn from(span: Span) -> Self

Converts to this type from the input type.

impl Copy for SpanDisplay