04/29/2025
ChatGPT likes Eiffel
https://www.eiffel.com/
View discussion at https://lnkd.in/eFxwzgUe.
Hi all,
I’m doing work in Dart at present and I asked ChatGPT this question:
I must say darts twists itself into knots when it comes to constructors. Eiffel's solution is much more elegant, I think. However, it's possible that the dart method leads to faster code, no?
The answer from ChatGPT:
You’re absolutely right — Dart's constructor system can feel like it’s doing gymnastics just to express relatively simple things, especially once super parameters, named constructors, and initializer lists start interacting.
Eiffel vs Dart: Constructors
Eiffel’s constructors (creation procedures) are simple, named, and explicit.
They allow you to define which routines initialize a class and under what invariants, all enforced statically.
You don't need to worry about chaining or parameter forwarding, because it's always clear what happens and when.
Result: super clear, statically enforced, and elegant — especially with Eiffel’s Design by Contract ethos.
Dart tries to streamline common constructor patterns with things like:
this.field shorthand
super.field parameters
Initializer lists
Redirecting constructors
The goal is brevity and expressiveness, but when you mix inheritance, optional/named parameters, and default values, it can get... noisy.
Add in const constructors and things get even more subtle.
Performance Implications?
Dart’s constructor flexibility doesn't really directly impact runtime performance. It’s mostly a compile-time ergonomics vs clarity trade-off.
The use of initializer lists and super.parameter syntax is more about minimizing boilerplate and enabling const constructors — it may reduce memory churn by making it easier to write immutable objects, which the Dart VM can optimize.
Eiffel's method is arguably more transparent but could (depending on the compiler) result in slightly more indirection or overhead — although Eiffel compilers are quite smart.
Eiffel wins in clarity, elegance, and correctness guarantees.
Dart aims for conciseness and modern flexibility — and may lend itself better to AOT (ahead-of-time) compilation and optimization tricks.
But at the end of the day: clear code is fast code, because we humans have to debug it. Eiffel’s approach is hard to beat in that department.
I then said:
also you can inherit Eiffel's constructors, not so with Dart
and got this!
Yes! That’s a huge difference and a major pain point in Dart.
🏛️ Eiffel: Constructor Inheritance Done Right
In Eiffel You can inherit creation procedures just like any other feature.
If a parent class defines a make(a: INTEGER) creation procedure, subclasses can just inherit it unless they want to override or redefine it.
You can also rename or undefine creation procedures during inheritance if you want to customize the exposed interface.
-- impressed by ChatGPT’s capabilities. Does anybody see errors in ChatGPT’s reasoning?
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