On Sunday, 2 November 2014 at 11:46:19 UTC, Marc Schütz wrote:
I think DMD doesn't generate good code for it; IIRC it lowers
scope(success) to a strange construct with an invisible
variable and a try/catch. Don't know the reasons for this,
maybe it has changed by now. Theoretically it would just need
to move the contents of the scope(success) after the evaluation
of the returned expression, which is cheap.
Are there cases in LDC where
auto e = r.moveFront;
r.popFront;
return e;
generates code less efficient than
scope(success) r.popFront;
return r.moveFront;
because of the extra assignment?
