Preferred Alias Declaration Style
Basile B.
b2.temp at gmx.com
Wed Jun 27 14:01:06 UTC 2018
On Wednesday, 27 June 2018 at 12:25:26 UTC, Uknown wrote:
> On Wednesday, 27 June 2018 at 10:22:38 UTC, Vijay Nayar wrote:
>> Most of the documentation at
>> https://dlang.org/spec/declaration.html#alias uses examples of
>> the form: `alias aliasName = other;`, where `aliasName`
>> becomes the new name to reference `other`. Alternatively, one
>> may write `alias other aliasName;`. My understanding is that
>> the syntax with `=` is the preferred one stylistically.
>>
>> However, when it comes to `alias this` declarations, the only
>> syntax supported is `alias other this;`, and one cannot write
>> `alias this = other;`.
>>
>> Does this mean that the `alias other aliasName;` syntax is
>> preferred, or does it simply mean that this is a low priority
>> issue that hasn't been addressed yet?
>
> `alias Alias = SomeType;` is preferred. It is the new style,
> and is more clear on what is the alias and what is the new
> type, especially when complex types come into play. For `alias
> this` though, there is only one syntax, `alias other this;`,
> since it does something conceptually different from regular
> aliases.
aliasing a function type only works with the old syntax too:
alias void proto_identifier();
Very unfriendly syntax. Impossible to express with
AliasDeclarationY (aka "the new alias syntax").
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