No, not at all. It’s a joke post, abusing the in-memory representation of the Option type to construct numbers. When nesting the Option type, it turns into a densely packed bit vector…
And if I understand the purpose of Fin correctly, you’re picking on the one ‘peasant language’ that actually has something like that built-in.
In Rust, you can specify the type of an array as e.g [u8; 3]. Which is an array containing values of type u8 (unsigned 8-bit integer) with a fixed, compile-time-guaranteed length of 3. So, [u8; 3] could be used to represent an RGB color, for example.
It is an array, not a set, but well, close enough.
Fin is a type of finite oridinals bounded by a nat. For example the WTF type in there is the same type as Fin 8.
Of course every language can have Fin with a fixed integer, like the post suggest, by just stacking options.
However for a properly defined Fin type, the input number is dynamic, serves as a bound for the element of the type. For example, Adga was able to type the fact that nth fibonacci number is a finite ordinal bounded by a function of n. Which I believe is not typable in rust?
Is this how you do Fin in peasant languages?
No, not at all. It’s a joke post, abusing the in-memory representation of the
Optiontype to construct numbers. When nesting theOptiontype, it turns into a densely packed bit vector…And if I understand the purpose of
Fincorrectly, you’re picking on the one ‘peasant language’ that actually has something like that built-in.In Rust, you can specify the type of an array as e.g
[u8; 3]. Which is an array containing values of typeu8(unsigned 8-bit integer) with a fixed, compile-time-guaranteed length of3. So,[u8; 3]could be used to represent an RGB color, for example.It is an array, not a set, but well, close enough.
Finis a type of finite oridinals bounded by a nat. For example theWTFtype in there is the same type asFin 8.Of course every language can have
Finwith a fixed integer, like the post suggest, by just stacking options.However for a properly defined
Fintype, the input number is dynamic, serves as a bound for the element of the type. For example, Adga was able to type the fact thatnth fibonacci number is a finite ordinal bounded by a function ofn. Which I believe is not typable in rust?