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Re: [ANN] Cratera Compiler v1.0.0

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On 2019年08月02日 2:47 a.m., Egor Skriptunoff wrote:

On Fri, Aug 2, 2019 at 12:19 AM Soni "They/Them" L. wrote:
 > On 2019年08月01日 6:05 p.m., Egor Skriptunoff wrote:
 >> Could you provide an example to show benefits of traits?
 >> What kinds of tasks traits solve better than conventional
 >> 'objects-and-methods' approach?
 >>
 >
 > I recommend reading
 https://en.wikipedia.org/wiki/Entity_component_system
 (Well, besides reading that, I recommend actually checking out
 Rust and
 using it for a while. You'll see what I mean.)
Could you just show a simple example from real-life programming where using traits is better than not using them? Such example should be understandable by any Lua programmer (without Rust knowledge). If you can't provide such example then why Lua users might want to use Cratera?
Let's say you have a trait Foo, with perhaps some methods (or all methods) depending on the object also being a Bar. With inheritance, your Foo would be a Bar, probably, which makes it an all-or-nothing situation. Take a look at e.g. https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.rev Additionally, names don't matter. You can have both Foo and Bar have a reverse method and it works fine. (this is also the case in Rust)

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