Function rustc_ap_rustc_span::with_source_map [−][src]
pub fn with_source_map<T, F: FnOnce() -> T>(
source_map: Lrc<SourceMap>,
f: F
) -> T
Calls the provided closure, using the provided SourceMap to format
any spans that are debug-printed during the closure's execution.
Normally, the global TyCtxt is used to retrieve the SourceMap
(see rustc_interface::callbacks::span_debug1). However, some parts
of the compiler (e.g. rustc_parse) may debug-print Spans before
a TyCtxt is available. In this case, we fall back to
the SourceMap provided to this function. If that is not available,
we fall back to printing the raw Span field values.