raw.runtime.truffle.ast.expressions.binary.OrNode Maven / Gradle / Ivy
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/*
* Copyright 2023 RAW Labs S.A.
*
* Use of this software is governed by the Business Source License
* included in the file licenses/BSL.txt.
*
* As of the Change Date specified in that file, in accordance with
* the Business Source License, use of this software will be governed
* by the Apache License, Version 2.0, included in the file
* licenses/APL.txt.
*/
package raw.runtime.truffle.ast.expressions.binary;
import com.oracle.truffle.api.frame.VirtualFrame;
import raw.runtime.truffle.ExpressionNode;
import raw.runtime.truffle.runtime.option.BooleanOption;
import raw.runtime.truffle.runtime.option.OptionLibrary;
public final class OrNode extends ExpressionNode {
@Child private ExpressionNode leftNode;
@Child private ExpressionNode rightNode;
public OrNode(ExpressionNode leftNode, ExpressionNode rightNode) {
this.leftNode = leftNode;
this.rightNode = rightNode;
}
@Override
public Object executeGeneric(VirtualFrame virtualFrame) {
Boolean left = getOperand(leftNode, virtualFrame);
if (left != null && left) {
// if left is false, OR evaluates to true
return new BooleanOption(true);
} else {
// left is either null or false (in which cases we need to check right)
Boolean right = getOperand(rightNode, virtualFrame);
if (left == null) {
// if left is null, we need to check if right is true or not
if (right != null && right) return new BooleanOption(true);
else return new BooleanOption();
} else {
// left is false, the result of OR is right
if (right != null) return new BooleanOption(right);
else return new BooleanOption();
}
}
}
private Boolean getOperand(ExpressionNode node, VirtualFrame frame) {
Object value = node.executeGeneric(frame);
OptionLibrary option = OptionLibrary.getFactory().create(value);
assert (option.isOption(value));
if (option.isDefined(value)) {
return (Boolean) option.get(value);
} else {
return null;
}
}
}