--- /dev/null
+package org.simantics.scl.compiler.elaboration.java;
+
+import org.simantics.scl.compiler.elaboration.expressions.EApply;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.elaboration.expressions.Expressions;
+import org.simantics.scl.compiler.elaboration.expressions.Variable;
+import org.simantics.scl.compiler.elaboration.query.compilation.EnforcingContext;
+import org.simantics.scl.compiler.elaboration.query.compilation.QueryCompilationContext;
+import org.simantics.scl.compiler.elaboration.relations.AbstractRelation;
+import org.simantics.scl.compiler.types.TVar;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+import org.simantics.scl.compiler.types.kinds.Kinds;
+
+public class ExecuteRelation extends AbstractRelation {
+ int phase;
+
+ public ExecuteRelation(int phase) {
+ this.phase = phase;
+ }
+
+ private static TVar A = Types.var(Kinds.STAR);
+ private static TVar E = Types.var(Kinds.EFFECT);
+ private static TVar[] TYPE_VARIABLES = new TVar[] {A, E};
+
+ @Override
+ public TVar[] getTypeVariables() {
+ return TYPE_VARIABLES;
+ }
+
+ private static final Type[] PARAMETER_TYPES = new Type[] {Types.functionE(Types.PUNIT, E, A)};
+
+ @Override
+ public Type[] getParameterTypes() {
+ return PARAMETER_TYPES;
+ }
+
+ @Override
+ public int getPhase() {
+ return phase;
+ }
+
+ @Override
+ public double getSelectivity(int boundVariables) {
+ return Double.POSITIVE_INFINITY;
+ }
+
+ @Override
+ public int getRequiredVariablesMask() {
+ return B;
+ }
+
+ @Override
+ public void generate(long location,
+ QueryCompilationContext context,
+ Type[] typeParameters, Variable[] parameters, int boundVariables) {
+ throw new IllegalArgumentException();
+ }
+
+ @Override
+ public Expression generateEnforce(long location, EnforcingContext context,
+ Type[] typeParameters,
+ Variable[] parameters) {
+ return new EApply(
+ Expressions.var(parameters[0]),
+ Expressions.punit());
+ }
+
+ @Override
+ public String toString() {
+ return "Execute";
+ }
+
+}