Re: std.container.array: Error: unable to determine fields of Test because of forward references

[Tobias Pankrath via Digitalmars-d-learn]

On Thursday, 31 October 2019 at 12:37:55 UTC, user1234 wrote:

struct S
{
 S*[] children;
}

because otherwise when you declare the array the compiler has 
not finished the semantic ana of S.


---
struct Test
{
Test[] t;
}
---

Works today. Putting pointers into the container (and thus having 
another indirection) is not an option, though.

Re: std.container.array: Error: unable to determine fields of Test because of forward references

[user1234 via Digitalmars-d-learn]

On Thursday, 31 October 2019 at 12:37:55 UTC, user1234 wrote:
On Thursday, 31 October 2019 at 12:29:28 UTC, Tobias Pankrath 
wrote:

[...]


Try

struct S
{
 S*[] children;
}

because otherwise when you declare the array the compiler has 
not finished the semantic ana of S.


so S size is not known while S* size is known as it's a pointer

Re: std.container.array: Error: unable to determine fields of Test because of forward references

[user1234 via Digitalmars-d-learn]

On Thursday, 31 October 2019 at 12:29:28 UTC, Tobias Pankrath 
wrote:

My Problem:

--- (https://run.dlang.io/is/CfLscj)
import std.container.array;
import std.traits;

struct Test
{
   Test[] t;
}

struct Test2
{
   Array!Test2 t;
}

int main()
{
return FieldTypeTuple!Test.length + FieldTypeTuple!Test2;
}
---

I've found https://issues.dlang.org/show_bug.cgi?id=19407 but I 
am not using separate compilation, just `dmd test.d`.


I want to have a tree structure like

---
struct S
{
S[] children;
}
---

but I do not want to rely on the GC and thus wanted to use a 
custom array type. What's the best way to do this?


Try

struct S
{
 S*[] children;
}

because otherwise when you declare the array the compiler has not 
finished the semantic ana of S.

std.container.array: Error: unable to determine fields of Test because of forward references

[Tobias Pankrath via Digitalmars-d-learn]

My Problem:

--- (https://run.dlang.io/is/CfLscj)
import std.container.array;
import std.traits;

struct Test
{
   Test[] t;
}

struct Test2
{
   Array!Test2 t;
}

int main()
{
return FieldTypeTuple!Test.length + FieldTypeTuple!Test2;
}
---

I've found https://issues.dlang.org/show_bug.cgi?id=19407 but I 
am not using separate compilation, just `dmd test.d`.


I want to have a tree structure like

---
struct S
{
S[] children;
}
---

but I do not want to rely on the GC and thus wanted to use a 
custom array type. What's the best way to do this?