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package org.zwobble.couscous.ast;
import org.zwobble.couscous.ast.visitors.NodeTransformer;
import org.zwobble.couscous.types.ScalarType;
import org.zwobble.couscous.types.Type;
import org.zwobble.couscous.util.ExtraIterables;
import org.zwobble.couscous.values.PrimitiveValue;
import org.zwobble.couscous.values.PrimitiveValues;
import org.zwobble.couscous.values.TypeValue;
import static org.zwobble.couscous.values.PrimitiveValues.value;
public class LiteralNode implements ExpressionNode {
public static final ExpressionNode UNIT = literal(PrimitiveValues.UNIT);
public static LiteralNode literal(PrimitiveValue value) {
return new LiteralNode(value, value.getType());
}
public static LiteralNode literal(String value) {
return literal(value(value));
}
public static LiteralNode literal(char value) {
return literal(value(value));
}
public static LiteralNode literal(int value) {
return literal(value(value));
}
public static LiteralNode literal(boolean value) {
return literal(value(value));
}
public static LiteralNode literal(ScalarType type) {
return literal(value(type));
}
public static LiteralNode of(PrimitiveValue value, Type type) {
return new LiteralNode(value, type);
}
private final PrimitiveValue value;
private final Type type;
private LiteralNode(PrimitiveValue value, Type type) {
this.value = value;
this.type = type;
}
public Type getType() {
return type;
}
public PrimitiveValue getValue() {
return value;
}
@Override
public int nodeType() {
return NodeTypes.LITERAL;
}
@Override
public Iterable<Node> childNodes() {
return ExtraIterables.empty();
}
@Override
public ExpressionNode transformSubtree(NodeTransformer transformer) {
return new LiteralNode(transformValue(transformer), transformer.transform(type));
}
private PrimitiveValue transformValue(NodeTransformer transformer) {
if (value instanceof TypeValue) {
return new TypeValue(transformer.transform(((TypeValue)value).getValue()));
} else {
return value;
}
}
@Override
public String toString() {
return "LiteralNode(value=" + value + ", type=" + type + ")";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((type == null) ? 0 : type.hashCode());
result = prime * result + ((value == null) ? 0 : value.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
LiteralNode other = (LiteralNode) obj;
if (type == null) {
if (other.type != null)
return false;
} else if (!type.equals(other.type))
return false;
if (value == null) {
if (other.value != null)
return false;
} else if (!value.equals(other.value))
return false;
return true;
}
}
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