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Imaginary type
--------------
Can be implemented with a suffix.
1i
1.2i
3 - 1i
1ie9
// This should probably not be allowed
2e3i // 2*10^(3i)
TOOD: how should complex arithmetic work?
Floating point exceptions
-------------------------
Problem 1: fp flags
Solution 1a. Have a pop_exception function
double z = (3*x-i) / y;
fp:pop_exception();
// Problem: Any function might pop the fp flags!
Solution 1b. Save and restore flags
using (fp:flags) { // fp flags are saved
double z = (3*x-i) / y;
if (fp:flags.bad()) leave;
} // fp flags are restored
Problem 2: fp traps
Solution 2a. Change behaviour with a function
fp:trap:make_abort();
fp:trap:make_ignore();
Solution 2a. Use "using"
using (fp:trap) {
// ...
using (fp:notrap) {
// ...
}
}
Integer exceptions
------------------
Same problems as with fp exceptions. The integer exceptions are:
* Overfow/underflow
- from aritmetic operations
- from negation
- from conversion from floating point
* Division by zero
* More?
Links
-----
* http://www.cs.berkeley.edu/~wkahan/JAVAhurt.pdf
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