Am 22.08.2010 21:45, schrieb bearophile:
(...)
import std.stdio: writeln;
import std.typecons: Tuple, tuple;
import std.traits: ReturnType, ParameterTypeTuple;
struct Memoize(alias F) {
ReturnType!F opCall(ParameterTypeTuple!F args) {
alias ReturnType!F ResultType;
static
Hey,
I've written some caching template which should cache the return values.
It looks like this:
//
template cached(F : R function(P), R, P...) {
R cached(P p) {
static R[Tuple!(P)] cache = [];
R* pointer = Tuple!(P)(p) in cache;
if(pointer !is null) {
Mafi:
I am not able to instatiate ths template in any way.
You are doing it wrong. Such template tricks are not easy to get right, so
probably the best thing you may do is to start from an empty program that
works, and then keep adding to it, and keep it working, until you reach
something
but it's not nice, maybe you can improve it, I have had to use a delegate
because
I have found a forward reference problem (I am not sure if it's worth for
Bugzilla):
This was one problem, but maybe there are other ones:
struct Foo(alias f) {}
Foo!main baz;
void main() {}
I have added it
