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Diffstat (limited to 'src/libsyntax_pos/lib.rs')
| -rw-r--r-- | src/libsyntax_pos/lib.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libsyntax_pos/lib.rs b/src/libsyntax_pos/lib.rs index 9a7d1fd8ee6..19f52d83a01 100644 --- a/src/libsyntax_pos/lib.rs +++ b/src/libsyntax_pos/lib.rs @@ -291,6 +291,12 @@ impl Span { self.ctxt().outer().expn_info().map(|info| info.call_site.source_callsite()).unwrap_or(self) } + /// The `Span for the tokens in the previous macro expansion from which `self` was generated, + /// if any + pub fn parent(self) -> Option<Span> { + self.ctxt().outer().expn_info().map(|i| i.call_site) + } + /// Return the source callee. /// /// Returns None if the supplied span has no expansion trace, |