Struct Snippet 

pub struct Snippet<'a> {
    pub line_no: u32,
    pub col_start: u32,
    pub col_end: u32,
    pub line_text: &'a str,
}

Source-snippet view shared by the pretty and JSON renderers: the one line of source covering a diagnostic’s span, plus the column range of the underlined region.

For multi-line spans the underlined region is clamped to the first line — both renderers point at the start of the offence.

Fields

line_no: u32

1-indexed line number.

col_start: u32

1-indexed codepoint column of the span’s first character.

col_end: u32

1-indexed codepoint column one past the span’s last character on this line (so col_end - col_start codepoints are underlined). Always ≥ col_start + 1 so the caret is visible.

line_text: &'a str

The line text, without the trailing \n.

Implementations

impl<'a> Snippet<'a>

pub fn from_span( line_index: &LineIndex, source: &'a str, span: &Range<usize>, ) -> Option<Self>

Build a snippet for span inside source. Returns None if span.start lies outside source or off a UTF-8 boundary — the same fallback as Diagnostic::at.

Trait Implementations

impl<'a> Clone for Snippet<'a>

fn clone(&self) -> Snippet<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Snippet<'a>

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

Formats the value using the given formatter.