From 477c555476244cff4809e79ae204a6fe90b07033 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Wed, 26 Oct 2016 10:48:14 +0800
Subject: Expand - Add a stubbed impl of some rustc-internal macros

---
 Makefile                         |  1 +
 src/expand/rustc_diagnostics.cpp | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 src/expand/rustc_diagnostics.cpp

diff --git a/Makefile b/Makefile
index 33733f64..52216f24 100644
--- a/Makefile
+++ b/Makefile
@@ -69,6 +69,7 @@ OBJ +=  expand/concat.o expand/stringify.o expand/file_line.o
 OBJ +=  expand/derive.o expand/lang_item.o
 OBJ +=  expand/std_prelude.o expand/crate_tags.o
 OBJ +=  expand/include.o
+OBJ +=  expand/rustc_diagnostics.o
 OBJ += macro_rules/mod.o macro_rules/eval.o macro_rules/parse.o
 OBJ += resolve/use.o resolve/index.o resolve/absolute.o
 OBJ += hir/from_ast.o hir/from_ast_expr.o
diff --git a/src/expand/rustc_diagnostics.cpp b/src/expand/rustc_diagnostics.cpp
new file mode 100644
index 00000000..e9990a93
--- /dev/null
+++ b/src/expand/rustc_diagnostics.cpp
@@ -0,0 +1,30 @@
+/*
+ * MRustC - Rust Compiler
+ * - By John Hodge (Mutabah/thePowersGang)
+ *
+ * expand/rustc_diagnostics.cpp
+ * - Stubbed handling for __register_diagnostic and __diagnostic_used
+ */
+#include <synext.hpp>
+#include <parse/common.hpp>  // TokenTree etc
+
+class CExpanderRegisterDiagnostic:
+    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$( TTStreamO(TokenTree()) );
+    }
+};
+class CExpanderDiagnosticUsed:
+    public ExpandProcMacro
+{
+    ::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const ::std::string& ident, const TokenTree& tt, AST::Module& mod) override
+    {
+        return box$( TTStreamO(TokenTree()) );
+    }
+};
+
+STATIC_MACRO("__register_diagnostic", CExpanderRegisterDiagnostic)
+STATIC_MACRO("__diagnostic_used", CExpanderDiagnosticUsed)
+
-- 
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