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$include <flow.sail>
val print = "print_endline" : string -> unit
val print_int = "print_int" : (string, int) -> unit
union exception = {
Epair : (range(0, 255), range(0, 255)),
Eunknown : unit,
Estring : string
}
val f : unit -> unit effect {escape}
function f () = throw(Estring("test"))
val g : unit -> string effect {escape}
function g () = {
print("in g()");
return("g return");
throw(Estring("never thrown from g"));
}
val main : unit -> unit effect {escape}
function main () = {
try {
print(g());
f(); // will throw Estring
throw(Epair(42, 24));
throw(Eunknown());
} catch {
Eunknown() => print("Caught Eunknown"),
Epair(x, y) => print("Caught Epair"),
Estring(str) => {
print("Caught Estring");
print(str)
}
};
try () catch {
_ => print("Unreachable!")
};
try throw(Epair(33, 1)) catch {
Epair(x, _) => {
print("2nd try Caught Epair");
print_int("x = ", x);
},
_ => ()
};
try throw(Eunknown()) catch {
_ => try let _ = g() in () catch {
_ => print("caught old exception")
}
};
try
try throw Eunknown() catch {
Estring(_) => ()
}
catch {
Eunknown() => print("Fall through OK"),
_ => ()
};
f();
()
}
|
