single_covspan_for_child_expn

rustc_mir_transform::coverage::spans

Function single_covspan_for_child_expn 

Source 
fn single_covspan_for_child_expn(
    tcx: TyCtxt<'_>,
    graph: &CoverageGraph,
    expn_tree: &ExpnTree,
    expn_id: ExpnId,
) -> Option<Covspan>
Expand description

For a single child expansion, try to distill it into a single span+BCB mapping.