protected void evaluateArrayAssignmentWithOperator(
String method, BinaryExpression expression, BinaryExpression leftBinExpr) {
CompileStack compileStack = getController().getCompileStack();
AsmClassGenerator acg = getController().getAcg();
OperandStack os = getController().getOperandStack();
// e.g. x[a] += b
// to avoid loading x and a twice we transform the expression to use
// ExpressionAsVariableSlot
// -> subscript=a, receiver=x, receiver[subscript]+b, =, receiver[subscript]
// -> subscript=a, receiver=x, receiver#getAt(subscript)#plus(b), =, receiver#putAt(subscript)
// -> subscript=a, receiver=x, receiver#putAt(subscript, receiver#getAt(subscript)#plus(b))
// the result of x[a] += b is x[a]+b, thus:
// -> subscript=a, receiver=x, receiver#putAt(subscript, ret=receiver#getAt(subscript)#plus(b)),
// ret
ExpressionAsVariableSlot subscript =
new ExpressionAsVariableSlot(controller, leftBinExpr.getRightExpression(), "subscript");
ExpressionAsVariableSlot receiver =
new ExpressionAsVariableSlot(controller, leftBinExpr.getLeftExpression(), "receiver");
MethodCallExpression getAt =
new MethodCallExpression(receiver, "getAt", new ArgumentListExpression(subscript));
MethodCallExpression operation =
new MethodCallExpression(getAt, method, expression.getRightExpression());
ExpressionAsVariableSlot ret = new ExpressionAsVariableSlot(controller, operation, "ret");
MethodCallExpression putAt =
new MethodCallExpression(receiver, "putAt", new ArgumentListExpression(subscript, ret));
putAt.visit(acg);
os.pop();
os.load(ret.getType(), ret.getIndex());
compileStack.removeVar(ret.getIndex());
compileStack.removeVar(subscript.getIndex());
compileStack.removeVar(receiver.getIndex());
}
private void evaluatePostfixMethod(
int op, String method, Expression expression, Expression orig) {
CompileStack compileStack = controller.getCompileStack();
final OperandStack operandStack = controller.getOperandStack();
// load Expressions
VariableSlotLoader usesSubscript = loadWithSubscript(expression);
// save copy for later
operandStack.dup();
ClassNode expressionType = operandStack.getTopOperand();
int tempIdx = compileStack.defineTemporaryVariable("postfix_" + method, expressionType, true);
// execute Method
execMethodAndStoreForSubscriptOperator(op, method, expression, usesSubscript, orig);
// remove the result of the method call
operandStack.pop();
// reload saved value
operandStack.load(expressionType, tempIdx);
compileStack.removeVar(tempIdx);
if (usesSubscript != null) compileStack.removeVar(usesSubscript.getIndex());
}
