Enum member none

symbolic value that constructs an Option in none state


						
				enum none(T)
				 = Option!T.init;

Example

Check that init value yields a none


auto vopt = none!int;
assert(vopt.isNone);
vopt = 12;
assert(vopt.isSome);
assert(vopt.front == 12);

// auto ropt = none!CTest;
// assert(ropt.isNone);
// assert(ropt._val is null);
// ropt = new CTest;
// assert(vopt.isSome);