diff options
Diffstat (limited to 'third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NullLiteralNode.java')
-rw-r--r-- | third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NullLiteralNode.java | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NullLiteralNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NullLiteralNode.java new file mode 100644 index 0000000000..66e67152cd --- /dev/null +++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/NullLiteralNode.java @@ -0,0 +1,51 @@ +package org.checkerframework.dataflow.cfg.node; + +import java.util.Collection; +import java.util.Collections; + +import com.sun.source.tree.LiteralTree; +import com.sun.source.tree.Tree; + +/** + * A node for the null literal. + * + * <pre> + * <em>null</em> + * </pre> + * + * @author Stefan Heule + * @author Charlie Garrett + * + */ +public class NullLiteralNode extends ValueLiteralNode { + + public NullLiteralNode(LiteralTree t) { + super(t); + assert t.getKind().equals(Tree.Kind.NULL_LITERAL); + } + + @Override + public Void getValue() { + return (Void) tree.getValue(); + } + + @Override + public <R, P> R accept(NodeVisitor<R, P> visitor, P p) { + return visitor.visitNullLiteral(this, p); + } + + @Override + public boolean equals(Object obj) { + // test that obj is a NullLiteralNode + if (obj == null || !(obj instanceof NullLiteralNode)) { + return false; + } + // super method compares values + return super.equals(obj); + } + + @Override + public Collection<Node> getOperands() { + return Collections.emptyList(); + } +} |