94 lines
3.2 KiB
Plaintext
94 lines
3.2 KiB
Plaintext
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.InnerTypeScope;
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import slangc.model.MemberModel;
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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 CountExpression extends ExpressionModel implements ExpressionOwner {
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ExpressionModel leftHandSide;
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String operator;
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public CountExpression(ExpressionOwner owner, Node source) {
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super(owner, source);
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leftHandSide = ExpressionModel.construct(this, ((Branch)source).getSubnode(0));
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operator = BinaryExpression.getOpName(((Branch)source).getSubnode(1));
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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 + "> Count expression (" + getSource().getNodeType() + ")");
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dumpResolved(reporter, indent + incr, incr);
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leftHandSide.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[] {leftHandSide};
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}
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@Override
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public TypeModel getExpectedResult(ExpressionModel e) {
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// TODO not sure if relevant here
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return null;
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}
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@Override
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public InnerTypeScope getTypeScope() {
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return getOwner().getTypeScope();
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}
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@Override
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public TypeModel resolveType(Node subnode) {
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return getOwner().resolveType(subnode);
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}
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@Override
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public MemberModel getMethodOrField() {
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return getOwner().getMethodOrField();
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}
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@Override
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protected ExpressionResult resolveResult() {
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if (leftHandSide.getResult().resolvesToValue()) {
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return new ExpressionResult.TypedValue(leftHandSide.getResult().getValueType());
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} else {
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return ExpressionResult.INVALID;
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}
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}
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@Override
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public TypeSignature innerGenerate(BytecodeInstructionWriter w) {
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TypeSignature lhsType = leftHandSide.generate(w);
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w.genDup(lhsType);
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w.genConst(w.getTarget().getHeap().getConstInt32("1"));
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if (operator.equals("++")) {
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TypeModel rt = BinaryExpression.generateALUOp(w, leftHandSide.getResult().getValueType(), "+", getSystem().getDefaultInt32Type());
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if (!rt.getTypeSignature().mappableEquals(leftHandSide.getResult().getValueType().getTypeSignature())) {
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w.genConvert(rt.getTypeSignature(), leftHandSide.getResult().getValueType().getTypeSignature());
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}
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leftHandSide.generateStore(w, leftHandSide.getResult().getValueType().getTypeSignature());
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return lhsType;
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} else if (operator.equals("--")) {
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TypeModel rt = BinaryExpression.generateALUOp(w, leftHandSide.getResult().getValueType(), "-", getSystem().getDefaultInt32Type());
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if (!rt.getTypeSignature().mappableEquals(leftHandSide.getResult().getValueType().getTypeSignature())) {
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w.genConvert(rt.getTypeSignature(), leftHandSide.getResult().getValueType().getTypeSignature());
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}
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leftHandSide.generateStore(w, leftHandSide.getResult().getValueType().getTypeSignature());
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return lhsType;
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} else {
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w.genError("TODO: innerGenerate for " + Type.of(this) + " with '" + operator + "'");
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return null;
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}
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}
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}
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