@Override
protected void assignToArray(
Expression orig, Expression receiver, Expression index, Expression rhsValueLoader) {
ClassNode current = getController().getClassNode();
ClassNode arrayType = getController().getTypeChooser().resolveType(receiver, current);
ClassNode arrayComponentType = arrayType.getComponentType();
int operationType = getOperandType(arrayComponentType);
BinaryExpressionWriter bew = binExpWriter[operationType];
AsmClassGenerator acg = getController().getAcg();
if (bew.arraySet(true) && arrayType.isArray()) {
OperandStack operandStack = getController().getOperandStack();
// load the array
receiver.visit(acg);
operandStack.doGroovyCast(arrayType);
// load index
index.visit(acg);
operandStack.doGroovyCast(int_TYPE);
// load rhs
rhsValueLoader.visit(acg);
operandStack.doGroovyCast(arrayComponentType);
// store value in array
bew.arraySet(false);
// load return value && correct operand stack stack
operandStack.remove(3);
rhsValueLoader.visit(acg);
} else {
super.assignToArray(orig, receiver, index, rhsValueLoader);
}
}
private void execMethodAndStoreForSubscriptOperator(
int op,
String method,
Expression expression,
VariableSlotLoader usesSubscript,
Expression orig) {
final OperandStack operandStack = controller.getOperandStack();
writePostOrPrefixMethod(op, method, expression, orig);
// we need special code for arrays to store the result (like for a[1]++)
if (usesSubscript != null) {
CompileStack compileStack = controller.getCompileStack();
BinaryExpression be = (BinaryExpression) expression;
ClassNode methodResultType = operandStack.getTopOperand();
final int resultIdx =
compileStack.defineTemporaryVariable("postfix_" + method, methodResultType, true);
BytecodeExpression methodResultLoader =
new VariableSlotLoader(methodResultType, resultIdx, operandStack);
// execute the assignment, this will leave the right side
// (here the method call result) on the stack
assignToArray(be, be.getLeftExpression(), usesSubscript, methodResultLoader);
compileStack.removeVar(resultIdx);
}
// here we handle a.b++ and a++
else if (expression instanceof VariableExpression
|| expression instanceof FieldExpression
|| expression instanceof PropertyExpression) {
operandStack.dup();
controller.getCompileStack().pushLHS(true);
expression.visit(controller.getAcg());
controller.getCompileStack().popLHS();
}
// other cases don't need storing, so nothing to be done for them
}
public void evaluateEqual(BinaryExpression expression, boolean defineVariable) {
AsmClassGenerator acg = controller.getAcg();
CompileStack compileStack = controller.getCompileStack();
OperandStack operandStack = controller.getOperandStack();
Expression rightExpression = expression.getRightExpression();
Expression leftExpression = expression.getLeftExpression();
ClassNode lhsType =
controller.getTypeChooser().resolveType(leftExpression, controller.getClassNode());
if (defineVariable
&& rightExpression instanceof EmptyExpression
&& !(leftExpression instanceof TupleExpression)) {
VariableExpression ve = (VariableExpression) leftExpression;
BytecodeVariable var =
compileStack.defineVariable(
ve, controller.getTypeChooser().resolveType(ve, controller.getClassNode()), false);
operandStack.loadOrStoreVariable(var, false);
return;
}
// let's evaluate the RHS and store the result
ClassNode rhsType;
if (rightExpression instanceof ListExpression && lhsType.isArray()) {
ListExpression list = (ListExpression) rightExpression;
ArrayExpression array =
new ArrayExpression(lhsType.getComponentType(), list.getExpressions());
array.setSourcePosition(list);
array.visit(acg);
} else if (rightExpression instanceof EmptyExpression) {
rhsType = leftExpression.getType();
loadInitValue(rhsType);
} else {
rightExpression.visit(acg);
}
rhsType = operandStack.getTopOperand();
boolean directAssignment = defineVariable && !(leftExpression instanceof TupleExpression);
int rhsValueId;
if (directAssignment) {
VariableExpression var = (VariableExpression) leftExpression;
if (var.isClosureSharedVariable() && ClassHelper.isPrimitiveType(rhsType)) {
// GROOVY-5570: if a closure shared variable is a primitive type, it must be boxed
rhsType = ClassHelper.getWrapper(rhsType);
operandStack.box();
}
// ensure we try to unbox null to cause a runtime NPE in case we assign
// null to a primitive typed variable, even if it is used only in boxed
// form as it is closure shared
if (var.isClosureSharedVariable()
&& ClassHelper.isPrimitiveType(var.getOriginType())
&& isNull(rightExpression)) {
operandStack.doGroovyCast(var.getOriginType());
// these two are never reached in bytecode and only there
// to avoid verifyerrors and compiler infrastructure hazzle
operandStack.box();
operandStack.doGroovyCast(lhsType);
}
// normal type transformation
if (!ClassHelper.isPrimitiveType(lhsType) && isNull(rightExpression)) {
operandStack.replace(lhsType);
} else {
operandStack.doGroovyCast(lhsType);
}
rhsType = lhsType;
rhsValueId = compileStack.defineVariable(var, lhsType, true).getIndex();
} else {
rhsValueId = compileStack.defineTemporaryVariable("$rhs", rhsType, true);
}
// TODO: if rhs is VariableSlotLoader already, then skip crating a new one
BytecodeExpression rhsValueLoader = new VariableSlotLoader(rhsType, rhsValueId, operandStack);
// assignment for subscript
if (leftExpression instanceof BinaryExpression) {
BinaryExpression leftBinExpr = (BinaryExpression) leftExpression;
if (leftBinExpr.getOperation().getType() == Types.LEFT_SQUARE_BRACKET) {
assignToArray(
expression,
leftBinExpr.getLeftExpression(),
leftBinExpr.getRightExpression(),
rhsValueLoader);
}
compileStack.removeVar(rhsValueId);
return;
}
compileStack.pushLHS(true);
// multiple declaration
if (leftExpression instanceof TupleExpression) {
TupleExpression tuple = (TupleExpression) leftExpression;
int i = 0;
for (Expression e : tuple.getExpressions()) {
VariableExpression var = (VariableExpression) e;
MethodCallExpression call =
new MethodCallExpression(
rhsValueLoader, "getAt", new ArgumentListExpression(new ConstantExpression(i)));
call.visit(acg);
i++;
if (defineVariable) {
operandStack.doGroovyCast(var);
compileStack.defineVariable(var, true);
operandStack.remove(1);
} else {
acg.visitVariableExpression(var);
}
}
}
// single declaration
else if (defineVariable) {
rhsValueLoader.visit(acg);
operandStack.remove(1);
compileStack.popLHS();
return;
}
// normal assignment
else {
int mark = operandStack.getStackLength();
// to leave a copy of the rightExpression value on the stack after the assignment.
rhsValueLoader.visit(acg);
TypeChooser typeChooser = controller.getTypeChooser();
ClassNode targetType = typeChooser.resolveType(leftExpression, controller.getClassNode());
operandStack.doGroovyCast(targetType);
leftExpression.visit(acg);
operandStack.remove(operandStack.getStackLength() - mark);
}
compileStack.popLHS();
// return value of assignment
rhsValueLoader.visit(acg);
compileStack.removeVar(rhsValueId);
}