On Sunday, 24 August 2025 at 14:40:36 UTC, Steven Schveighoffer
wrote:
```d
// solution 1: (preferred)
if(auto r = cast(MyInt)result){
writeln(r);
}else if(auto r = cast(MyFloat)result){
writeln(r);
}
// solution 2:
if(typeid(result) is typeid(MyInt)){
writeln(cast(MyInt)result);
}el
On Sunday, 24 August 2025 at 08:25:56 UTC, H. S. Teoh wrote:
On Sun, Aug 24, 2025 at 05:20:06AM +, David T. Oxygen via
Digitalmars-d-learn wrote: [...]
But I still don't know how to use `is` `__traits`.
[...]
Operations involving types, such as type comparisons, are
usually done
On Sunday, 24 August 2025 at 08:35:57 UTC, Per Nordlöw wrote:
Which are the pros and cons of foreach vs static foreach on a
compile time tuple in D in terms of compiler performance and
resource usage? Does static foreach generate more ast
duplications?
--
Yes, it will make the compile-time lo
On Sunday, 24 August 2025 at 03:29:30 UTC, Paul Backus wrote:
On Sunday, 24 August 2025 at 03:13:38 UTC, David T. Oxygen
wrote:
Hello every kind and helpful D programmers, I need your help.
I've met two problems about getting types.
In D, we can use many keywords to get the type of an object,
Hello every kind and helpful D programmers, I need your help.
I've met two problems about getting types.
In D, we can use many keywords to get the type of an object, such
as `typeof`,`typeid`,`is`.
However, I don't know the differences between them well. I also
don't know how to use them in D..
On Monday, 28 July 2025 at 18:02:45 UTC, H. S. Teoh wrote:
On Sun, Jul 27, 2025 at 05:02:35PM +, user1234 via
Digitalmars-d-learn wrote: [...]
Simply because because if OP writes
```
class Person{
string name;
this(string name){this.name=name;}
}
class Someone:Person{
}
void main(){
I wrote a piece of code like this:
```d
class Person{
string name;
this(string name){this.name=name;}
}
class Someone:Person{
alias super this;
}
void main(){
Someone x=new Someone("Bob");
}
```
And then,I got a Error-Message:
```
ab.d(6): Error: variable name expe
