Index: src/SynTree/Expression.cc
===================================================================
--- src/SynTree/Expression.cc	(revision e4d7c1c357a5b1b2a17a980a263be977539b988b)
+++ src/SynTree/Expression.cc	(revision 0c840fc175421beff77fdd02802dd0b5c1da973c)
@@ -267,13 +267,13 @@
 }
 
-CastExpr::CastExpr( Expression * arg, Type * toType, bool isGenerated ) : arg(arg), isGenerated( isGenerated ) {
+CastExpr::CastExpr( Expression * arg, Type * toType, bool isGenerated, CastKind kind ) : arg(arg), isGenerated( isGenerated ), kind( kind ) {
 	set_result(toType);
 }
 
-CastExpr::CastExpr( Expression * arg, bool isGenerated ) : arg(arg), isGenerated( isGenerated ) {
+CastExpr::CastExpr( Expression * arg, bool isGenerated, CastKind kind ) : arg(arg), isGenerated( isGenerated ), kind( kind ) {
 	set_result( new VoidType( Type::Qualifiers() ) );
 }
 
-CastExpr::CastExpr( const CastExpr & other ) : Expression( other ), arg( maybeClone( other.arg ) ), isGenerated( other.isGenerated ) {
+CastExpr::CastExpr( const CastExpr & other ) : Expression( other ), arg( maybeClone( other.arg ) ), isGenerated( other.isGenerated ), kind( other.kind ) {
 }
 
Index: src/SynTree/Expression.h
===================================================================
--- src/SynTree/Expression.h	(revision e4d7c1c357a5b1b2a17a980a263be977539b988b)
+++ src/SynTree/Expression.h	(revision 0c840fc175421beff77fdd02802dd0b5c1da973c)
@@ -271,6 +271,14 @@
 	bool isGenerated = true;
 
-	CastExpr( Expression * arg, bool isGenerated = true );
-	CastExpr( Expression * arg, Type * toType, bool isGenerated = true );
+	enum CastKind {
+		Default, // C
+		Coerce, // reinterpret cast
+		Return  // overload selection
+	};
+
+	CastKind kind = Default;
+
+	CastExpr( Expression * arg, bool isGenerated = true, CastKind kind = Default );
+	CastExpr( Expression * arg, Type * toType, bool isGenerated = true, CastKind kind = Default );
 	CastExpr( Expression * arg, void * ) = delete; // prevent accidentally passing pointers for isGenerated in the first constructor
 	CastExpr( const CastExpr & other );