--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trunk/src/dil/semantic/Interpreter.d	Tue Jan 22 14:00:08 2008 +0100
@@ -0,0 +1,62 @@
+/++
+  Author: Aziz Köksal
+  License: GPL3
++/
+module dil.semantic.Interpreter;
+
+import dil.ast.Visitor;
+import dil.ast.Node,
+       dil.ast.Declarations,
+       dil.ast.Expressions,
+       dil.ast.Statements,
+       dil.ast.Types,
+       dil.ast.Parameters;
+
+import dil.semantic.Symbol,
+       dil.semantic.Symbols,
+       dil.semantic.Scope,
+       dil.semantic.Types;
+import dil.Information;
+
+class Interpreter : Visitor
+{
+  Scope scop;
+  InfoManager infoMan;
+
+  static class Result : Expression
+  {
+  }
+
+  static const Result CantInterpret;
+
+  static this()
+  {
+    CantInterpret = new Result;
+    CantInterpret.type = Types.Error;
+  }
+
+  this(InfoManager infoMan)
+  {
+    this.infoMan = infoMan;
+  }
+
+  /// Start interpretation.
+  Expression start(Expression e)
+  {
+    return e;
+  }
+
+  bool isImmutable(Expression e)
+  {
+    switch (e.kind)
+    {
+    alias NodeKind NK;
+    case NK.IntExpression, NK.RealExpression,
+         NK.ComplexExpression, NK.CharExpression,
+         NK.BoolExpression, NK.StringExpression:
+      return true;
+    default:
+      return false;
+    }
+  }
+}

--- a/trunk/src/main.d	Tue Jan 22 13:56:21 2008 +0100
+++ b/trunk/src/main.d	Tue Jan 22 14:00:08 2008 +0100
@@ -15,7 +15,8 @@
 import dil.semantic.Module;
 import dil.semantic.Symbols;
 import dil.semantic.Pass1,
-       dil.semantic.Pass2;
+       dil.semantic.Pass2,
+       dil.semantic.Interpreter;
 import dil.translator.German;
 import dil.doc.Doc;
 import dil.Messages;