still want this:
https://forum.dlang.org/thread/lmvyzfatklcvrijcy...@forum.dlang.org
I dont think it will magicly appear in a few hours but maybe
someone wants to write the templated opApply code
some active code:
```d
auto takewhilecmp(string op="<",R,T)(R r,ref T senti){
struct range{
R r;
T* senti;
auto front()=>r.front;
void popFront()=>r.popFront;
bool empty()=>mixin(" ! (r.front"~op~"*senti)") || r.empty;
}
return range(r,&senti);
}
unittest{
int i=100;
foreach(e;iota(0,1000).takewhilecmp(i)){
i-=e;
//e.writeln;
}
}
ref T reintupitive(T,S)(ref S t)=>*cast(T*)&t;
auto indexs(T)(ref T[] r){
struct slicesimple{
ulong length;
T* data;
}
return
iota(0,int.max).takewhilecmp!"<"(r.reintupitive!(slicesimple).length);
}
unittest{
int[] foo=[1,2,5,7];
foreach(i;foo.indexs){
if(foo[i]%2){
foo~=foo[i]*2;
}
if(i==3){
foo~=25;
}}
//foo.writeln;
}
void printarray(A)(A a){
foreach(i;a.indexs){
writeln(i,":",a[i]);
}}
auto indexs(T,S)(ref T[S] a)=>a.byKey;
auto indexs(T,int N)(ref T[N] a)=>iota(0,N);
//unittest{
// printarray([1,2,5,7]);
// printarray([1:"foo",2:"bar"]);
// int[5] foo=[1,2,3,4,5];
// printarray(foo);
//}
auto iteratebyindex(A)(ref A a){
alias R=typeof(a.indexs);
struct range{
A* a;
R r;
auto ref front()=>(*a)[r.front];
auto ref index()=>r.front;
void popFront()=>r.popFront;
bool empty()=>r.empty;
}
return range(&a,a.indexs);
}
auto iteratebyindex(A,R)(ref A a,R r){
struct range{
A* a;
R r;
auto ref front()=>(*a)[r.front];
auto ref index()=>r.front;
void popFront()=>r.popFront;
bool empty()=>r.empty;
}
return range(&a,r);
}
unittest{
int[] foo=[1,2,5,7];
foreach(e;foo.iteratebyindex){
if(e%2){
foo~=e*2;
}
}
//foo.writeln;
}
```
I will want an foreach with access to an index generated by
`iteratebyindex` after a split(which is one of the functions that
breaks countUntil, also see filter and unicode handling)
