'any' for return param instead of '_'?

[renlite]

You replaced #aute with _.
There exists already a primitive keyword any. Wouldn't be any more meaningful?
_ could be used for unused variables on the left.

[brendanfh]

Good question!

any is actually not a keyword. It is just a builtin type that is available in to all Onyx programs. You can find its definition in core/builtin.onyx and it will look something like this:

any :: struct {
    data: rawptr
    type: type_expr
}

any is used where there is a runtime-known dynamic return type. When writing a function that returns any, you have to allocate a buffer for the data of the any, and the return an instance of the any structure. In other words, any is just like other structures; it just has special syntax highlighting and a name akin to the idea of any in TypeScript or similar languages.

I like to think of the _ as a "hole" that the compiler will fill. It is also allowed as the type of a local variable, that the compiler will figure out when the variable is first assigned to.

main :: () {
    x: _
    x = 10
}