> Ada's approach to integer overflows is substantially similar to AIR
Isn't Ada's response to overflow implementation-defined?
Sort of.
First, the standard seems to require a Constraint_Error when signed
integer overflow happens. For example, on page 47 of the ADA 2012 standard:
"For a signed integer type, the exception Constraint_Error is raised by
the execution of an operation that cannot deliver the correct result
because it is outside the base range of the type."
http://www.ada-auth.org/standards/12rm/RM-Final.pdf
On the other hand, other parts of the standard provide significant
wiggle room, giving a design that I believe is more or less equivalent
to AIR. The discussion here is the best that I know of:
http://gcc.gnu.org/ml/gcc/2009-07/msg00486.html
I believe that Ada's design point is a solid one.
John Regehr
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