ok, thanks.
2013/10/4 Rick McGuire <object.r...@gmail.com>
> This is seriously not going to work. The code that handles the raising of
> the exception changes an awful lot of the internal state of the
> interpreter.
>
> Rick
>
>
> On Fri, Oct 4, 2013 at 7:59 AM, Jean-Louis Faucher
> <jfaucher...@gmail.com>wrote:
>
>> ExpressionOperator.cpp
>> Is it possible to catch an exception during the evaluation of operator,
>> and try something else with the same arguments ?
>>
>> According to my tests, surrounding by catch/try is not enough.
>> The evaluation stack is probably in a bad state in the catch{}, I don't
>> know how to bring it back to a good state.
>> I tried to do like the catch in RexxActivation::run, but without success
>> (unwindToFrame and stack.clear).
>>
>> The "something else" is an alternate way to find a candidate
>> implementation, where the dispatching is not limited to the first argument.
>>
>> Thanks.
>> Jean-Louis
>>
>>
>> RexxObject *RexxBinaryOperator::evaluate(
>> RexxActivation *context, /* current activation
>> context */
>> RexxExpressionStack *stack ) /* evaluation
>> stack */
>>
>> /******************************************************************************/
>> /* Function: Execute a REXX binary
>> operator */
>>
>> /******************************************************************************/
>> {
>> /* evaluate the target */
>> RexxObject *left = this->left_term->evaluate(context, stack);
>> /* evaluate the right term */
>> RexxObject *right = this->right_term->evaluate(context, stack);
>> * try
>> {
>> * /* evaluate the message */
>> RexxObject *result = callOperatorMethod(left, this->oper, right);
>> /* replace top two stack elements */
>> stack->operatorResult(result); /* with this
>> one */
>> /* trace if
>> necessary */
>> context->traceOperator(operatorName(), result);
>> return result; /* return the
>> result */
>> * }
>> catch (RexxActivation *t)
>> {
>> // try something else with the same arguments left and right
>> }
>> *}
>>
>>
>>
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>
>
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