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use ress::Item;
/// A comment handler will allow you to specify
/// behavior about what to do with comments
/// officially comments are supposed to operate
/// the same as whitespace so the default behavior
/// would be to throw away any comments found
pub trait CommentHandler {
fn handle_comment(&mut self, comment: Item);
}
/// The default comment handler,
/// this will discard comments
/// provided to it
pub struct DefaultCommentHandler;
impl CommentHandler for DefaultCommentHandler {
fn handle_comment(&mut self, _: Item) {}
}
impl<F> CommentHandler for F
where F: FnMut(Item)
{
fn handle_comment(&mut self, item: Item) {
self(item)
}
}