On 3/26/11 5:33 PM, Kagamin wrote:
Kagamin Wrote:
Kagamin Wrote:
Robert Jacques Wrote:
Should be Algebraic!(T, void). If that doesn't currently compile, we
should make it compile.
Andrei
For what it's worth, both Algebraic!(T, void*) and Algebraic!(T, void)
compile on my branch of std.variant.
can't assign null
alias Algebraic!(int,void) nint;
nint n1=5;
assert(n1==5);
n1=null;
\std\variant.d:497: Error: static assert "Cannot store a void* in a
VariantN!(maxSize,int,void). Valid types are (int, void)"
test.d:45: instantiated from here: opAssign!(void*)
Ahh, there's a workaround:
alias Algebraic!(int,void) nint;
nint n1=5;
assert(n1.get!(int)==5);
n1=nint(); //uninitialized Variant, sort of null
assert(!n1.hasValue);
assert(n1.peek!(int)==null);
writeln("error here:");
assert(n1.get!(int)==0);
this also works without allowing void!
alias Algebraic!(int) nint;
nint n1=5;
assert(n1.get!(int)==5);
n1=nint(); //still null
assert(!n1.hasValue);
assert(n1.peek!(int)==null);
writeln("error:");
assert(n1.get!(int)==0);
Awesome. Talk about forgetting my own code :o).
Andrei
