From c971a6fa8375598ecf9c99ee6b086e8cf957f568 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Sun, 29 Jul 2018 12:47:44 +0100
Subject: All - Initial work on supporting 1.29 as a target version

---
 src/expand/file_line.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/expand/file_line.cpp')

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);
 
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