• mw (5/5) Jun 20 2020 Are their returned value, i.e the field names and their types are
• Stanislav Blinov (7/12) Jun 20 2020 Yes, in the same order and of the same length. You need two
• mw (4/13) Jun 22 2020 Can we add this information to the doc? to make it clear to the
• Stanislav Blinov (7/11) Jun 22 2020 It's pretty clear in that doc already:
• mw (5/7) Jun 23 2020 Just-Did-It:

mw <mingwu gmail.com> writes:

Are their returned value, i.e the field names and their types are 
always in the same order, and of the same length?

If they are not, how to get sync-ed pairs (name, type)?

If they are, why we need two separate calls, which cause 
confusion.

Stanislav Blinov <stanislav.blinov gmail.com> writes:

On Saturday, 20 June 2020 at 20:17:54 UTC, mw wrote:
 Are their returned value, i.e the field names and their types 
 are always in the same order, and of the same length?

 If they are not, how to get sync-ed pairs (name, type)?

 If they are, why we need two separate calls, which cause 
 confusion.

Yes, in the same order and of the same length. You need two 
because they're not calls (and the results are not "return 
values"), they're tuples constructed out of compile-time type 
information, and the former (FieldNameTuple) has to generate new 
symbols, which may not be desirable in cases when you don't need 
the names.

mw <mingwu gmail.com> writes:

On Saturday, 20 June 2020 at 20:42:03 UTC, Stanislav Blinov wrote:
 On Saturday, 20 June 2020 at 20:17:54 UTC, mw wrote:
 Are their returned value, i.e the field names and their types 
 are always in the same order, and of the same length?

 If they are not, how to get sync-ed pairs (name, type)?

 If they are, why we need two separate calls, which cause 
 confusion.


 Yes, in the same order and of the same length.

Can we add this information to the doc? to make it clear to the 
user:

https://dlang.org/library/std/traits.html

Stanislav Blinov <stanislav.blinov gmail.com> writes:

On Monday, 22 June 2020 at 19:55:29 UTC, mw wrote:

 Yes, in the same order and of the same length.

 Can we add this information to the doc? to make it clear to the 
 user:

 https://dlang.org/library/std/traits.html

It's pretty clear in that doc already:

alias FieldNameTuple(T) = 
staticMap!(NameOf,T.tupleof[0..__dollar-isNested!T]);
alias Fields(T) = typeof(T.tupleof[0..__dollar-isNested!T]);

But if you'd like it spelled out in text as well, you can make a 
PR for the Phobos repository.

mw <mingwu gmail.com> writes:

On Monday, 22 June 2020 at 20:08:37 UTC, Stanislav Blinov wrote:
 But if you'd like it spelled out in text as well, you can make 
 a PR for the Phobos repository.

Just-Did-It:

https://github.com/dlang/phobos/pull/7540


The point of doc is that the user don't have to dive into the 
code to know it's usage.