On 7/19/17 11:41 AM, Jack Stouffer wrote:
On Wednesday, 19 July 2017 at 13:30:56 UTC, sontung wrote:
Thoughts on this sort of feature?
To be frank, I don't think that helping the programmer reduce the line
count in their program by one line is worth further complicating the
language.
It's 3 lines. One for the extra scope, one for the declaration, and one
for the closing scope.
Hm... just had an idea:
auto propertyCheck(string condition, T)(T val)
{
static struct Result {
T _value;
opCast(B: bool)() {
mixin("return _value " ~ condition ~ ";");
}
alias _value this;
}
return Result(val);
}
if(auto x = someFunc().propertyCheck!" >= 0")
{
// use x as if it was the result of someFunc()
}
Has some drawbacks, for instance you may want to use the true
booleanness of whatever T is inside the function.
-Steve
