1 files changed, 9 insertions, 9 deletions
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index d6e088c41661..725f9fe88e52 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -35,11 +35,8 @@ struct EvalState;
 
 struct Expr
 {
-    virtual void show(std::ostream & str) = 0;
-    virtual void eval(EvalState & state, Env & env, Value & v)
-    {
-        throw Error("not implemented");
-    }
+    virtual void show(std::ostream & str);
+    virtual void eval(EvalState & state, Env & env, Value & v);
 };
 
 std::ostream & operator << (std::ostream & str, Expr & e);
@@ -62,6 +59,13 @@ struct ExprString : Expr
     COMMON_METHODS
 };
 
+/* Temporary class used during parsing of indented strings. */
+struct ExprIndStr : Expr
+{
+    string s;
+    ExprIndStr(const string & s) : s(s) { };
+};
+
 struct ExprPath : Expr
 {
     string s;
@@ -206,10 +210,6 @@ struct TermFun
 ATerm bottomupRewrite(TermFun & f, ATerm e);
 
 
-/* Create an attribute set expression from an Attrs value. */
-Expr makeAttrs(const ATermMap & attrs);
-
-
 /* Check whether all variables are defined in the given expression.
    Throw an exception if this isn't the case. */
 void checkVarDefs(const ATermMap & def, Expr e);