On Friday, 15 July 2016 at 08:11:13 UTC, nik wrote:
//unittest
//{
// auto result_1 = Result!(void, string)(void);
// auto result_2 = Result!(void, string)(void);
// assert(result_1.is_result);
// assert(result_1 == result_2);
//}
You wanted to handle the void case?
Because there are no void type you have to check the type at
compile time.
Enter static if...
static if(!is(T == void)) {
T result() const pure nothrow @safe @property
{
return _result;
}
}
static if(!is(T == void))
T _result;
static if(!is(T == void)) {
this(inout T result) inout
{
_result = result;
_is_result = true;
}
} else {
this() {
_is_result = true;
//Or whatever semantics Rust use for void result
}
}
And about conditional compilation (static if, version etc...):
https://dlang.org/spec/version.html
