65 lines
1.9 KiB
Plaintext
65 lines
1.9 KiB
Plaintext
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package slangc.model.expressions;
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import slangc.api.BytecodeInstructionWriter;
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import slangc.api.Reporter;
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import slangc.bytecode.TypeSignature;
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import slangc.model.ExpressionModel;
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import slangc.model.ExpressionOwner;
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import slangc.model.ExpressionResult;
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import slangc.model.TypeModel;
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import slangc.parser.Branch;
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import slangc.parser.Node;
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public class InstanceofExpression extends ExpressionModel implements ExpressionOwner {
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TypeModel type;
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ExpressionModel valueExpression;
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public InstanceofExpression(ExpressionOwner owner, Node source) {
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super(owner, source);
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valueExpression = ExpressionModel.construct(this, ((Branch)source).getSubnode(0));
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type = owner.resolveType(((Branch)source).getSubnode(2));
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}
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public TypeModel getType() {
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return type;
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}
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public ExpressionModel getValueExpression() {
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return valueExpression;
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}
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@Override
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public void dump(Reporter reporter, String indent, String incr) {
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reporter.note("DUMP", indent + "> Instanceof '" + type + "':");
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dumpResolved(reporter, indent + incr, incr);
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valueExpression.dump(reporter, indent + incr, incr);
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}
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@Override
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public ExpressionModel[] getSubexpressions() {
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return new ExpressionModel[] {valueExpression};
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}
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@Override
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public TypeModel getExpectedResult(ExpressionModel e) {
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// TODO: I'm not sure if there are cases where cast influences decoding of right-hand-side
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return null;
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}
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@Override
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protected ExpressionResult resolveResult() {
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return new ExpressionResult.TypedValue((TypeModel)lookupSimpleName("boolean"));
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}
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@Override
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public TypeSignature innerGenerate(BytecodeInstructionWriter w) {
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TypeSignature incoming = valueExpression.generate(w);
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w.genTypeCheck(incoming, getType().getTypeSignature());
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return getSystem().getDefaultBooleanType().getTypeSignature();
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}
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public TypeModel resolveType(Node n) {
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return super.resolveType(n); // TODO: Better support for interfaces
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}
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}
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