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digitalmars.dip.ideas - The RangeExpression

reply user1234 <user1234 12.de> writes:
Simple as

     Expression ".." Expression

Would simplify the grammar of the SwitchStatement, the 
ForeachStatement. Would open possibilities for operator 
overloading.
Nov 12
next sibling parent reply user1234 <user1234 12.de> writes:
On Wednesday, 12 November 2025 at 18:34:01 UTC, user1234 wrote:

 Simple as

     Expression ".." Expression

 Would simplify the grammar of the SwitchStatement, the 
 ForeachStatement. Would open possibilities for operator 
 overloading.


It's about https://wiki.dlang.org/DIP58 actually.
Nov 12
parent reply ltdk <khoa.alter.acc gmail.com> writes:
On Wednesday, 12 November 2025 at 18:38:06 UTC, user1234 wrote:

 On Wednesday, 12 November 2025 at 18:34:01 UTC, user1234 wrote:

 Simple as

     Expression ".." Expression

 Would simplify the grammar of the SwitchStatement, the 
 ForeachStatement. Would open possibilities for operator 
 overloading.


 It's about https://wiki.dlang.org/DIP58 actually.


Oh, I really like it. Make tensor manipulation (pretty much 
anything related to ML/DL) more convenient.
Nov 12
parent reply Serg Gini <kornburn yandex.ru> writes:
On Thursday, 13 November 2025 at 03:11:36 UTC, ltdk wrote:

 Oh, I really like it. Make tensor manipulation (pretty much 
 anything related to ML/DL) more convenient.


Do you use D for tensor manipulations?
Nov 13
next sibling parent ltdk <khoa.alter.acc gmail.com> writes:
On Thursday, 13 November 2025 at 08:10:41 UTC, Serg Gini wrote:

 On Thursday, 13 November 2025 at 03:11:36 UTC, ltdk wrote:

 Oh, I really like it. Make tensor manipulation (pretty much 
 anything related to ML/DL) more convenient.


 Do you use D for tensor manipulations?


recently, no .... I switched to Julia.
Nov 14
prev sibling parent jmh530 <john.michael.hall gmail.com> writes:
On Thursday, 13 November 2025 at 08:10:41 UTC, Serg Gini wrote:

 On Thursday, 13 November 2025 at 03:11:36 UTC, ltdk wrote:

 Oh, I really like it. Make tensor manipulation (pretty much 
 anything related to ML/DL) more convenient.


 Do you use D for tensor manipulations?


Doesn't have to mean tensors per se. D's built-in arrays and 
mir's ndslice and any other similar projects would benefit from 
something like this.
Nov 14
prev sibling parent user1234 <user1234 12.de> writes:
On Wednesday, 12 November 2025 at 18:34:01 UTC, user1234 wrote:

 Simple as

     Expression ".." Expression

 Would simplify the grammar of the SwitchStatement, the 
 ForeachStatement. Would open possibilities for operator 
 overloading.


foreach over ranges is really special:

```d
int[] a;
foreach( i; mixin("a") ) {}

foreach( i; mixin("0 .. 100") ) {} // whoops
```

The problem however would be that the RangeExpression is an 
internal compiler thing because it has no storage, example of 
problematic uses:

```d
auto b = a .. c;
call(a .. z);
```

But you want them to be expressions anyway

```d
void v(alias T)(a)
{
     switch (a){
        case T: break;
        default: assert(0);
     }
}

v!(0..10)(rand());
```

So you're a bit between a macro and an expression. The D way for 
macro is mixin, but here that does not work.
Nov 12