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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/Statement.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/Statement.java
new file mode 100755
index 000000000..19fba69cb
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/block/Statement.java
@@ -0,0 +1,27 @@
+package org.simantics.scl.compiler.elaboration.expressions.block;
+
+import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
+import org.simantics.scl.compiler.elaboration.contexts.EnvironmentalContext;
+import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.internal.parsing.Symbol;
+
+public abstract class Statement extends Symbol {
+
+    public abstract Expression toExpression(EnvironmentalContext context, boolean monadic, Expression in);
+    public abstract void setLocationDeep(long loc);
+    public abstract void resolvePattern(TranslationContext context);
+    public abstract boolean mayBeRecursive();
+    
+    public Statement replace(ReplaceContext context) {
+        throw new InternalCompilerError(getClass().getSimpleName() + " does not support replace.");
+    }
+    
+    public Statement copy() {
+        return replace(new ReplaceContext(null));
+    }
+    
+    public abstract void accept(StatementVisitor visitor);
+    
+}