Circular Aliases

[Francis Lalonde]

Coming back to ceylon after a year for a first real project, I've decided to write a TOML parser using parcey.

I'm trying to define the TOML model top-down using aliases, but I've hit my first bump trying to define the recursive structure of TOML values :

alias TOMLKey => String;

alias TOMLValue => String | Integer | Float | Boolean | Date | Time | DateTime | TOMLArray | TOMLMap;

alias TOMLMap => Map<TOMLKey, TOMLValue>;

alias TOMLArray => List<TOMLValue>;

I think I understand why, but I dont know know how to specify it another way.

[John Vasileff]

Yes, it's true that type aliases cannot be recursively defined. They are a compile time fiction and must ultimately simplify to non-alias types.

But, you should be able to use classes or interfaces to define TOMLMap and TOMLArray.

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[Lisi]

Investigate ceylon.json as example:

https://modules.ceylon-lang.org/repo/1/ceylon/json/1.3.2/module-doc/api/index.html

https://github.com/ceylon/ceylon-sdk/tree/master/source/ceylon/json

суббота, 27 мая 2017 г., 16:11:29 UTC+3 пользователь Francis Lalonde написал:

[Nikolay Rychkov]

Ты что на цейлоне кодишь до сих пор?

воскресенье, 28 мая 2017 г., 15:45:58 UTC+3 пользователь Lisi написал: