record: C# like records for D

[Dylan Graham]

On Friday, 16 July 2021 at 13:54:36 UTC, vit wrote:
> On Wednesday, 14 July 2021 at 23:16:05 UTC, Dylan Graham wrote:
>> [DUB](https://code.dlang.org/packages/record)
>> [Github](https://github.com/hmmdyl/record)
>>
>> This is record. It aims to implement records similar to what 
>> C# has by leveraging D's metaprogramming. [C# Example 
>> 1](https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/types/records) [C# Example 2](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/tutorials/records).
>>
>> Future steps are going to be adding a record struct; default 
>> value support; init-only-setters like in C#, wherein at the 
>> end of construction or duplication, the init lambda for the 
>> field is called, and the field can be set that once.
>
> What adventage has record over normal immutable/const class?

In terms of mutability, none.

The duplicate method, however, lets you copy and mutate (once at 
duplication) a record without impacting the integrity of the 
original. You can do this with an immutable class, but then you 
have to roll your own.

Really, it's more a convenience / less typing sort of feature, as 
it implements all the common boilerplate for you, which should 
help with consistency of code.