Function std.experimental.checkedint.Checked.opCast
Casting operator to integral, bool, or floating point type. If Hook
defines hookOpCast, the call immediately returns
hook. Otherwise, casting to bool yields get != 0 and casting to another integral that can represent all
values of T returns get promoted to U.
U opCast(U, _)()
if (isIntegral!U || isFloatingPoint!U || is(U == bool));
If a cast to a floating-point type is requested and Hook defines
onBadCast, the cast is verified by ensuring get == cast(T)
U(get). If that is not true, hook is returned.
If a cast to an integral type is requested and Hook defines onBadCast,
the cast is verified by ensuring get and cast(U)
get are the same arithmetic number. (Note that int(-1) and
uint(1) are different values arithmetically although they have the same
bitwise representation and compare equal by language rules.) If the numbers
are not arithmetically equal, hook is
returned.
Example
writeln(cast(uint)checked(42)); // 42
writeln(cast(uint)checked!WithNaN(-42)); // uint.max