1 files changed, 9 insertions, 0 deletions
diff --git a/src/expand/file_line.cpp b/src/expand/file_line.cpp
index 7a827ccf..2bf85ffd 100644
--- a/src/expand/file_line.cpp
+++ b/src/expand/file_line.cpp
@@ -46,6 +46,14 @@ class CExpanderColumn:
         return box$( TTStreamO(sp, TokenTree(Token((uint64_t)get_top_span(sp).start_ofs, CORETYPE_U32))) );
     }
 };
+class CExpanderUnstableColumn:
+    public ExpandProcMacro
+{
+    ::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const ::std::string& ident, const TokenTree& tt, AST::Module& mod) override
+    {
+        return box$( TTStreamO(sp, TokenTree(Token((uint64_t)get_top_span(sp).start_ofs, CORETYPE_U32))) );
+    }
+};
 
 class CExpanderModulePath:
     public ExpandProcMacro
@@ -65,5 +73,6 @@ class CExpanderModulePath:
 STATIC_MACRO("file", CExpanderFile);
 STATIC_MACRO("line", CExpanderLine);
 STATIC_MACRO("column", CExpanderColumn);
+STATIC_MACRO("__rust_unstable_column", CExpanderUnstableColumn);
 STATIC_MACRO("module_path", CExpanderModulePath);