Function rustc_mir_transform::coverage::spans::from_mir::unexpand_into_body_span_with_visible_macro

source · 
pub(crate) fn unexpand_into_body_span_with_visible_macro(
    original_span: Span,
    body_span: Span
) -> Option<(Span, Option<Symbol>)>
Expand description

Returns an extrapolated span (pre-expansion1) corresponding to a range within the function’s body source. This span is guaranteed to be contained within, or equal to, the body_span. If the extrapolated span is not contained within the body_span, None is returned.

1Expansions result from Rust syntax including macros, syntactic sugar, etc.).

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