func Test_validIPSetType(t *testing.T) {
	testCases := []struct {
		setType   Type
		expectErr bool
	}{
		{ // case[0]
			setType:   Type("foo"),
			expectErr: true,
		},
		{ // case[1]
			setType:   HashIPPortNet,
			expectErr: false,
		},
		{ // case[2]
			setType:   HashIPPort,
			expectErr: false,
		},
		{ // case[3]
			setType:   HashIPPortIP,
			expectErr: false,
		},
		{ // case[4]

		n.SetType(nil)
		return n
	}
	if !n.Y.Type().IsInteger() {
		n.SetType(nil)
		return n
	}
	n.SetType(n.X.Type())
	return n
}

// tcUnsafeSlice typechecks an OUNSAFESLICE node.
func tcUnsafeSlice(n *ir.BinaryExpr) *ir.BinaryExpr {
	n.X = Expr(n.X)
	n.Y = Expr(n.Y)
	if n.X.Type() == nil || n.Y.Type() == nil {
		n.SetType(nil)
		return n
	}

	if t == nil || r.Type() == nil {
		n.SetType(nil)
		return n
	}
	switch t.Kind() {
	default:
		base.Errorf("invalid operation: %v (type %v does not support indexing)", n, t)
		n.SetType(nil)
		return n

	case types.TSTRING, types.TARRAY, types.TSLICE:
		n.Index = indexlit(n.Index)
		if t.IsString() {
			n.SetType(types.ByteType)
		} else {
			n.SetType(t.Elem())
		}
		why := "string"

	args := []string{"create", set.Name, string(set.SetType)}
	if set.SetType == HashIPPortIP || set.SetType == HashIPPort || set.SetType == HashIPPortNet || set.SetType == HashIP {
		args = append(args,
			"family", set.HashFamily,
			"hashsize", strconv.Itoa(set.HashSize),
			"maxelem", strconv.Itoa(set.MaxElem),
		)
	}
	if set.SetType == BitmapPort {
		args = append(args, "range", set.PortRange)
	}

            replaceExpr(expr.getExpression()));
        result.setType(expr.getType());
        result.setSourcePosition(expr);
        replaceVisitedExpressionWith(result);
    }

    @Override
    public void visitNotExpression(NotExpression expr) {
        NotExpression result = new NotExpression(
            replaceExpr(expr.getExpression()));
        result.setType(expr.getType());
        result.setSourcePosition(expr);

			break
		}
		n = ir.NewConstExpr(v, n)
		n.SetType(t)
		return n

	case ir.OPLUS, ir.ONEG, ir.OBITNOT, ir.ONOT, ir.OREAL, ir.OIMAG:
		ot := operandType(n.Op(), t)
		if ot == nil {
			n = DefaultLit(n, nil)
			break
		}

		n := n.(*ir.UnaryExpr)
		n.X = convlit(n.X, ot)
		if n.X.Type() == nil {
			n.SetType(nil)
			return n
		}
		n.SetType(t)
		return n

        toolchain.setType("TYPE");
        toolchain.setProvides(props);
        PersistedToolchains userResult = new PersistedToolchains();
        userResult.setToolchains(Collections.singletonList(toolchain));

        props = new Properties();
        props.put("key", "global_value");
        toolchain = new ToolchainModel();
        toolchain.setType("TYPE");
        toolchain.setProvides(props);

	}
	ptr = ir.NewUnaryExpr(base.Pos, ir.OSPTR, n)
	if n.Type().IsString() {
		ptr.SetType(types.Types[types.TUINT8].PtrTo())
	} else {
		ptr.SetType(n.Type().Elem().PtrTo())
	}
	ptr.SetTypecheck(1)
	length = ir.NewUnaryExpr(base.Pos, ir.OLEN, n)
	length.SetType(types.Types[types.TINT])
	length.SetTypecheck(1)
	return ptr, length
}

		// if res != nil {
		//    res = res.type
		// }

		// Grab its parts.
		itab := ir.NewUnaryExpr(base.Pos, ir.OITAB, c)
		itab.SetType(types.Types[types.TUINTPTR].PtrTo())
		itab.SetTypecheck(1)
		data := ir.NewUnaryExpr(n.Pos(), ir.OIDATA, c)
		data.SetType(types.Types[types.TUINT8].PtrTo()) // Type is generic pointer - we're just passing it through.
		data.SetTypecheck(1)

			n.SetType(nil)
			return n
		}
		if !n.Y.Type().IsBoolean() {
			base.Errorf("invalid operation: %v (operator %v not defined on %s)", n, n.Op(), typekind(n.Y.Type()))
			n.SetType(nil)
			return n
		}
		l, r, t := tcArith(n, n.Op(), n.X, n.Y)
		n.X, n.Y = l, r
		n.SetType(t)
		return n

	// shift operators
	case ir.OLSH, ir.ORSH: