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Functions
Wu functions are expressions, but can also be declared using the same notation as
struct. For example we can declare functions like this:add_two: fun(a: int) {
a += 2
}
The following is just as valid, but more ugly:
add_two := fun(a: int) {
a += 2
}
They are the exact same behind the scenes. No difference at all.
Functions return the last expression in their body implicitly(like in Rust) like so:
ten: fun {
10
}
print(ten()) # 10
Why have parentheses if they're empty anyways?
You are still able to use explicit returns:
twenty: fun {
return ten() + ten()
}
Of course, as we're dealing with a decent language, higher order functions are a thing:
apply: fun(f: fun(int) -> int, a: int) -> int {
f(a)
}
# 12
apply(fun(a: int) { a + 2 }, 10)
Now for something vaguely interesting. Splats are basically a catchall parameter, that binds as many arguments you throw at it into an array:
choose_first: fun(things: ...) -> any {
things[0]
}
a := choose_first(1, 2, 3, 4, 5, 6)
print(a) # 1
Of course we can type the splats:
choose_second: fun(floats: ...float) -> float {
floats[1]
}
a := choose_second(1.0, 2.1, 3.8)
print(a) # 2.1
Last modified 4yr ago