package org.jruby.ir.instructions;
import org.jruby.ir.*;
import org.jruby.ir.operands.Boolean;
import org.jruby.ir.operands.Operand;
import org.jruby.ir.operands.StringLiteral;
import org.jruby.ir.operands.Variable;
import org.jruby.ir.transformations.inlining.CloneInfo;
import org.jruby.ir.transformations.inlining.InlineCloneInfo;
import org.jruby.ir.transformations.inlining.SimpleCloneInfo;
public class NonlocalReturnInstr extends ReturnBase implements FixedArityInstr {
public final String methodName; // Primarily a debugging aid
public NonlocalReturnInstr(Operand returnValue, String methodName) {
super(Operation.NONLOCAL_RETURN, returnValue);
this.methodName = methodName;
}
@Override
public Operand[] getOperands() {
return new Operand[] { returnValue, new StringLiteral(methodName) };
}
@Override
public String toString() {
return getOperation() + "(" + returnValue + ", <" + methodName + ">" + ")";
}
public boolean computeScopeFlags(IRScope scope) {
scope.getFlags().add(IRFlags.HAS_NONLOCAL_RETURNS);
return true;
}
@Override
public Instr clone(CloneInfo info) {
if (info instanceof SimpleCloneInfo) return new NonlocalReturnInstr(returnValue.cloneForInlining(info), methodName);
InlineCloneInfo ii = (InlineCloneInfo) info;
if (ii.isClosure()) {
if (ii.getHostScope() instanceof IRMethod) {
// Treat like inlining of a regular method-return
Variable v = ii.getCallResultVariable();
return v == null ? null : new CopyInstr(v, returnValue.cloneForInlining(ii));
}
return new NonlocalReturnInstr(returnValue.cloneForInlining(ii), methodName);
} else {
throw new UnsupportedOperationException("Nonlocal returns shouldn't show up outside closures.");
}
}
@Override
public void visit(IRVisitor visitor) {
visitor.NonlocalReturnInstr(this);
}
}