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.comwrote:
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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