1 files changed, 49 insertions, 0 deletions
diff --git a/src/parse/interpolated_fragment.hpp b/src/parse/interpolated_fragment.hpp
new file mode 100644
index 00000000..40aa764a
--- /dev/null
+++ b/src/parse/interpolated_fragment.hpp
@@ -0,0 +1,49 @@
+/*
+ */
+#pragma once
+
+#include <cassert>
+
+class TypeRef;
+class TokenTree;
+namespace AST {
+    class Pattern;
+    class Path;
+    class ExprNode;
+    class MetaItem;
+};
+
+class InterpolatedFragment
+{
+public:
+    enum Type
+    {
+        TT,
+        PAT,
+        PATH,
+        TYPE,
+        
+        EXPR,
+        STMT,
+        BLOCK,
+        
+        META,
+    } m_type;
+    
+    void*   m_ptr;
+    
+    InterpolatedFragment(InterpolatedFragment&& );
+    InterpolatedFragment& operator=(InterpolatedFragment&& );
+    //InterpolatedFragment(const InterpolatedFragment& );
+    InterpolatedFragment(TokenTree );
+    InterpolatedFragment(::AST::Pattern);
+    InterpolatedFragment(::AST::Path);
+    InterpolatedFragment(::TypeRef);
+    InterpolatedFragment(::AST::MetaItem );
+    ~InterpolatedFragment();
+    InterpolatedFragment(Type , ::AST::ExprNode*);
+    
+    TokenTree& as_tt() { assert(m_type == TT); return *reinterpret_cast<TokenTree*>(m_ptr); }
+    
+    friend ::std::ostream& operator<<(::std::ostream& os, const InterpolatedFragment& x);
+};