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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/EViewPattern.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/EViewPattern.java
new file mode 100644
index 000000000..268ee8ea8
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/EViewPattern.java
@@ -0,0 +1,137 @@
+package org.simantics.scl.compiler.elaboration.expressions;
+
+import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
+import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
+import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
+import org.simantics.scl.compiler.environment.Environment;
+import org.simantics.scl.compiler.errors.Locations;
+import org.simantics.scl.compiler.internal.codegen.references.IVal;
+import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;
+import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+import org.simantics.scl.compiler.types.exceptions.MatchException;
+import org.simantics.scl.compiler.types.util.MultiFunction;
+
+import gnu.trove.map.hash.TObjectIntHashMap;
+import gnu.trove.set.hash.THashSet;
+import gnu.trove.set.hash.TIntHashSet;
+
+public class EViewPattern extends Expression {
+    public Expression expression;
+    public Expression pattern;
+    
+    public EViewPattern(Expression expression, Expression pattern) {
+        this.expression = expression;
+        this.pattern = pattern;
+    }
+
+    @Override
+    public void collectRefs(TObjectIntHashMap<Object> allRefs, TIntHashSet refs) {
+        expression.collectRefs(allRefs, refs);
+        pattern.collectRefs(allRefs, refs);
+    }
+
+    @Override
+    public void collectVars(TObjectIntHashMap<Variable> allVars, TIntHashSet vars) {
+        expression.collectVars(allVars, vars);
+        pattern.collectVars(allVars, vars);
+    }
+
+    @Override
+    public void forVariables(VariableProcedure procedure) {
+        expression.forVariables(procedure);
+        pattern.forVariables(procedure);
+    }
+    
+    @Override
+    public Expression inferType(TypingContext context) {
+        context.setInPattern(false);
+        expression = expression.inferType(context);
+        context.setInPattern(true);
+        MultiFunction mfun;
+        try {
+            mfun = Types.matchFunction(expression.getType(), 1);
+        } catch (MatchException e) {
+            context.getErrorLog().log(expression.location, "Expected a function as a transformation expression.");
+            return new EError(location);
+        }
+        setType(mfun.parameterTypes[0]);
+        pattern.checkType(context, mfun.returnType);
+        return this;
+    }
+
+    @Override
+    protected void updateType() throws MatchException {
+        MultiFunction mfun = Types.matchFunction(expression.getType(), 1);
+        setType(mfun.parameterTypes[0]);
+    }
+
+    @Override
+    public IVal toVal(Environment env, CodeWriter w) {
+        throw new InternalCompilerError(location, "EViewPattern.toVal should not be invoked.");
+    }
+
+    @Override
+    public void collectFreeVariables(THashSet<Variable> vars) {
+        throw new InternalCompilerError(location, "Cannot collect free variables for a pattern.");
+    }
+    
+    @Override
+    public void removeFreeVariables(THashSet<Variable> vars) {
+        expression.collectFreeVariables(vars);
+        pattern.removeFreeVariables(vars);
+    }
+
+    @Override
+    public Expression resolve(TranslationContext context) {
+        context.getErrorLog().log("View pattern cannot occur only in patterns. Maybe you are missing '\\' in front of a lambda experssion?");
+        return new EError(location);
+    }
+
+    @Override
+    public Expression resolveAsPattern(TranslationContext context) {
+        expression = expression.resolve(context);
+        pattern = pattern.resolveAsPattern(context);
+        return this;
+    }
+    
+    @Override
+    public void setLocationDeep(long loc) {
+        if(location == Locations.NO_LOCATION) {
+            location = loc; 
+            expression.setLocationDeep(loc);
+            pattern.setLocationDeep(loc);
+        }
+    }
+
+    @Override
+    public Expression decorate(ExpressionDecorator decorator) {
+        expression = expression.decorate(decorator);
+        return this;
+    }
+
+    @Override
+    public void collectEffects(THashSet<Type> effects) {
+        expression.collectEffects(effects);
+    }
+
+    @Override
+    public void accept(ExpressionVisitor visitor) {
+        visitor.visit(this);
+    }
+
+    @Override
+    public Expression accept(ExpressionTransformer transformer) {
+        return transformer.transform(this);
+    }
+    
+    @Override
+    public Expression simplify(SimplificationContext context) {
+        expression = expression.simplify(context);
+        pattern = pattern.simplify(context);
+        return this;
+    }
+
+}