From 94f9c14d526abfe9b18045fc638e8f5a3a670210 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 21 Jan 2014 18:29:55 +0100
Subject: Fix some clang warnings

---
 src/libexpr/nixexpr.hh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/libexpr/nixexpr.hh')

diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index bc6993477c48..7586fffb83d4 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -48,7 +48,7 @@ std::ostream & operator << (std::ostream & str, const Pos & pos);
 
 struct Env;
 struct Value;
-struct EvalState;
+class EvalState;
 struct StaticEnv;
 struct Expr;
 
@@ -71,6 +71,7 @@ string showAttrPath(const AttrPath & attrPath);
 
 struct Expr
 {
+    virtual ~Expr() { };
     virtual void show(std::ostream & str);
     virtual void bindVars(const StaticEnv & env);
     virtual void eval(EvalState & state, Env & env, Value & v);
-- 
cgit 1.4.1