Re: Template not seeming to instantiate a second time with default alias parameter
On Tuesday, 30 August 2016 at 21:35:29 UTC, ag0aep6g wrote:
On 08/30/2016 11:28 PM, wobbles wrote:
I'll have to try find a workaround for now :/
This seems to work and isn't too ugly:
class Node(T, alias func) {/*...*/}
alias Node(T) = Node!(T, (T t) => t*t);
Excellent - thanks for these.
This one will work for me :)
I was going to do something messy with a nested template and some
static ifs. But, complicated things are complicated. This is much
easier.
Thanks!
Re: Template not seeming to instantiate a second time with default alias parameter
On 08/30/2016 11:28 PM, wobbles wrote:
I'll have to try find a workaround for now :/
This also seems to work, but has a slightly different meaning:
class Node(T, alias func = t => t*t) {/* ... */}
The default func is a template here. Equivalent to this:
auto square(T)(T t) { return t*t; }
class Node(T, alias func = square) {/* ... */}
Re: Template not seeming to instantiate a second time with default alias parameter
On 08/30/2016 11:28 PM, wobbles wrote:
I'll have to try find a workaround for now :/
This seems to work and isn't too ugly:
class Node(T, alias func) {/*...*/}
alias Node(T) = Node!(T, (T t) => t*t);
Re: Template not seeming to instantiate a second time with default alias parameter
On Tuesday, 30 August 2016 at 20:55:20 UTC, ag0aep6g wrote:
On 08/30/2016 10:41 PM, wobbles wrote:
class Node(T, alias func = (T t => t*t))(){
//whatever
}
//instantiate
Node!(int) intNode;
Node!(float) floatNode; // fails as lambda func expects an
int.
Am I doing something wrong or is this a bug?
Proper test case:
class Node(T, alias func = (T t) => t*t)
{
void method() { func(T.init); }
}
//instantiate
Node!(int) intNode;
Node!(float) floatNode; // fails as lambda func expects an
int.
Looks like a bug to me. Similar to this:
https://issues.dlang.org/show_bug.cgi?id=14501
Yeah. Looks related.
I'll have to try find a workaround for now :/
Re: Template not seeming to instantiate a second time with default alias parameter
On 08/30/2016 10:41 PM, wobbles wrote:
class Node(T, alias func = (T t => t*t))(){
//whatever
}
//instantiate
Node!(int) intNode;
Node!(float) floatNode; // fails as lambda func expects an int.
Am I doing something wrong or is this a bug?
Proper test case:
class Node(T, alias func = (T t) => t*t)
{
void method() { func(T.init); }
}
//instantiate
Node!(int) intNode;
Node!(float) floatNode; // fails as lambda func expects an int.
Looks like a bug to me. Similar to this:
https://issues.dlang.org/show_bug.cgi?id=14501
Template not seeming to instantiate a second time with default alias parameter
Hi,
Code here:
https://gist.github.com/grogancolin/066a8a8c105fa473dfee961e2481a30e
Basically, it seems when a template has an alias parameter like
class Node(T, alias func = (T t => t*t))(){
//whatever
}
//instantiate
Node!(int) intNode;
Node!(float) floatNode; // fails as lambda func expects an int.
Am I doing something wrong or is this a bug?
