Struct CommentMap 

pub struct CommentMap<'a, 'src> { /* private fields */ }

Associates comments with statement spans using a leading-comment heuristic.

A comment is “leading” for a statement if it appears before the statement and no other statement is closer. Comments after the last statement are “trailing”.

Implementations

impl<'a, 'src> CommentMap<'a, 'src>

pub fn build<'arena>( comments: &'a [Comment<'src>], stmts: &[Stmt<'arena, 'src>], ) -> Self

Build a comment map from a list of comments and statements.

Both comments and stmts must be in source order (which they are as produced by the parser).

pub fn leading_comments(&self, stmt_span: Span) -> &[&'a Comment<'src>]

Get comments that lead the statement at the given span.

pub fn trailing_comments(&self) -> &[&'a Comment<'src>]

Get comments that appear after all statements.

pub fn iter_leading(&self) -> impl Iterator<Item = (u32, &[&'a Comment<'src>])>

Iterate over all (stmt_start_offset, comments) pairs.

pub fn is_empty(&self) -> bool

Returns true if no comments were mapped.

pub fn len(&self) -> usize

Total number of comments in the map.